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Chapter

-1

7088-8000

June 1998

DCT-7088 PortableDigital Correlation Transit TimeUltrasonic Flowmeter

Software Version 3.23 POLYSONICSPOLYSONICSPOLYSONICSPOLYSONICS ®

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INSTRUCTION MANUAL

DCT-7088 PORTABLEDIGITAL CORRELATION

TRANSIT TIME FLOWMETER

Notice

This manual is designed to promote personal and systemsafety and to optimize product performance. It should beread carefully before installing, using, or maintaining theflowmeter.

If a problem occurs that is not resolved in the manual, referto Chapter 7 for more information on additional service andsupport.

USAPeek Measurement, Inc.10335 Landsbury, Suite 300Houston, Texas 77099-3407 USATelephone: (713) 879-3700Facsimile: (713) 498-7721

EuropePeek Measurement, Ltd.King's WorthyWinchester, Hampshire SO23 7QA UKTelephone: (01962) 883200Facsimile: (01962) 885530

Publication Number 7088-8000

© Peek Measurement Inc. 6/98

Printed in the U.S.A.POLYSONICSPOLYSONICSPOLYSONICSPOLYSONICS®

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Table of Contents

DCT-7088 PortableDigital Correlation Transit Time

Ultrasonic Flowmeter

CHAPTER 1:PRODUCT OVERVIEW ................................................................... 1-1

1.1 INTRODUCTION ............................................................................................................ 1-1

1.2 THEORY OF OPERATION ........................................................................................... 1-1

1.3 TRANSIT TIME ACCURACY....................................................................................... 1-3

1.4 OPERATING THE FLOWMETER............................................................................... 1-31.4.1 RS232 PORT .............................................................................................................................................1-3

1.5 POWER ............................................................................................................................. 1-41.5.1 FUSES .......................................................................................................................................................1-4

1.6 EXTERNAL FEATURES................................................................................................ 1-6

1.7 SOFTWARE UPGRADES .............................................................................................. 1-7

1.8. STANDARD CONFIGURATION AND OPTIONS .................................................... 1-8

1.9 TECHNICAL SPECIFICATIONS................................................................................. 1-9

CHAPTER 2:SYSTEM COMPONENTS................................................................. 2-1

2.1 BREAKOUT BOX COMPONENTS.............................................................................. 2-12.1.1 BATTERY CHARGER/AC ADAPTER...................................................................................................2-22.1.2 PRINTER ..................................................................................................................................................2-2

2.2 SLIDE TRACK................................................................................................................. 2-3

2.3 CURRENT LOOP WIRING AND CURRENT LOOP POWERING OPTION........ 2-4

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CHAPTER 3:CONFIGURING AND OPERATING THE FLOWMETER 3-1

3.1 KEYPAD AND DISPLAY ............................................................................................... 3-23.1.1 KEYPAD AND DISPLAY COMPONENTS............................................................................................3-23.1.2 DISPLAY CONTRAST AND BACKLIGHT...........................................................................................3-3

3.2 DIRECT MENU ACCESS............................................................................................... 3-3

3.3 ACCESSING THE MENUS BY SCROLLING ............................................................ 3-53.3.1 SCROLLING THROUGH THE MAIN MENU AND SUB-MENUS......................................................3-53.3.2 SCROLLING THROUGH PRIMARY DISPLAYS, SETUP MENUS, AND DIAGNOSTIC MENUS ..................................................................................................................3-6

3.4 ENTERING DATA IN THE SETUP MENUS .............................................................. 3-6

3.5 QUICK SETUP................................................................................................................. 3-7

3.6 PRIMARY DISPLAYS, SETUP MENUS, AND DIAGNOSTIC MENUS................. 3-83.6.1 PRIMARY DISPLAYS .............................................................................................................................3-83.6.2 PIPE SETUP MENUS...............................................................................................................................3-93.6.3 LINER SETUP MENUS .........................................................................................................................3-113.6.4 FLUID SETUP MENUS .........................................................................................................................3-133.6.5 TRANSDUCER SETUP MENUS...........................................................................................................3-143.6.6 FLOW SETUP MENUS..........................................................................................................................3-153.6.7 TOTALIZER SETUP MENUS ...............................................................................................................3-183.6.8 OPTIONS SETUP MENUS ....................................................................................................................3-213.6.9 CALIBRATION SETUP MENUS ..........................................................................................................3-253.6.10 CURRENT LOOP SETUP MENUS .....................................................................................................3-273.6.11 ALARMS SETUP MENUS ..................................................................................................................3-283.6.12 DATA LOG SETUP MENUS...............................................................................................................3-303.6.13 DIAGNOSTICS DISPLAY MENUS....................................................................................................3-333.6.14 PRINT SETUP AND PRINT COMMANDS ........................................................................................3-34

3.7 MASTER ERASE FUNCTION AND EMERGENCY OVERRIDE PASSWORDS ............................................................... 3-37

3.7.1 EMERGENCY OVERRIDE PASSWORDS...........................................................................................3-373.7.2 MASTER ERASE FUNCTION ..............................................................................................................3-37

CHAPTER 4:INSTALLING THE TRANSDUCERS .................................... 4-1

4.1 MEASUREMENT SITE SELECTION.......................................................................... 4-1

4.2 SPACING AND MOUNTING THE TRANSDUCERS ................................................ 4-34.2.1 USING THE SLIDE TRACK....................................................................................................................4-4

4.3 ALIGNING THE TRANSDUCERS ............................................................................... 4-5

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4.4 TRANSDUCER MOUNTING METHODS ................................................................... 4-64.4.1 V METHOD ..............................................................................................................................................4-64.4.2 W METHOD .............................................................................................................................................4-74.4.3 Z METHOD...............................................................................................................................................4-8

4.5 HIGH TEMPERATURE TRANSDUCER BLOCKS................................................. 4-14

4.6 SONIC COUPLING COMPOUND.............................................................................. 4-14

4.7 NYLON (CLOTH) TIE-DOWN STRAPS ................................................................... 4-15

CHAPTER 5:CALIBRATION ......................................................................... 5-1

5.1 ZERO SET CALIBRATION........................................................................................... 5-15.1.1 PRELIMINARY STEPS FOR ZERO SET CALIBRATIONS .................................................................5-25.1.2 ZERO FLOW SET METHOD ..................................................................................................................5-25.1.3 MANUAL ZERO SET ..............................................................................................................................5-2

5.2 SCALE FACTOR CALIBRATION ............................................................................... 5-35.2.1 SCALE FACTOR PRECAUTIONS .........................................................................................................5-45.2.2 CHANGING THE SCALE FACTOR.......................................................................................................5-4

CHAPTER 6:CONFIGURING THE CURRENT LOOP.............................. 6-1

CHAPTER 7:SERVICE SUPPORT AND WARRANTY.............................. 7-1

7.1 RESOLVING THE PROBLEM ..................................................................................... 7-1

7.2 LOCAL REPRESENTATIVE SUPPORT..................................................................... 7-1

7.3 CONTACTING POLYSONICS BY PHONE................................................................ 7-1

7.4 FACTORY SERVICE...................................................................................................... 7-2

7.5 FIELD SERVICE ............................................................................................................. 7-2

7.6 WARRANTY .................................................................................................................... 7-3

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APPENDIX A:POLYLINK FLOWMETER DATA LINK UTILITY...........A-1

A.1 HARDWARE REQUIREMENTS ................................................................................ A-2A.1.1 PLANTCOM AND PLANTCOM PLUS ................................................................................................A-2

A.2 INSTALLING AND RUNNING POLYLINK ............................................................. A-3A.2.1 RUNNING POLYLINK FROM AN IBM-COMPATIBLE PC ..............................................................A-3A.2.2 RUNNING POLYLINK FROM A DDF3088 .........................................................................................A-6

A.3 REMOTE MONITORING AND CONFIGURING (VT100 MODE) ....................... A-8A.3.1 DIAGNOSTIC DISPLAY MODE...........................................................................................................A-8

A.4 RS232 SETUP ............................................................................................................... A-10

A.5 DATA LOGGER .......................................................................................................... A-11A.5.1 TRANSFERRING A DATA LOG FILE...............................................................................................A-12A.5.2 VIEWING A DATA LOG FILE IN STRIP CHART FORMAT ..........................................................A-12A.5.3 DELETING A DATA LOG FILE .........................................................................................................A-13

A.6 UPLOADING SOFTWARE ON THE DDF4088 AND DDF4488 ........................... A-13A.6.1 UPGRADING THE FLOWMETER SOFTWARE WITH POLYLINK...............................................A-14A.6.2 INITIAL UPGRADES OF THE DDF4088 (NON-POLYLINK UPGRADE)......................................A-17A.6.3 ENTERING THE SERIAL NUMBER FOR DDF4088 UPGRADES ..................................................A-22

A.7 GRAPHICAL SIGNAL ANALYSIS FOR THE DDF4088 AND DDF4488 ........... A-22

APPENDIX B:PIPE SCHEDULES....................................................................B-1

APPENDIX C:RELATIONSHIP BETWEEN SPECIFIC GRAVITY, VISCOSITY,AND SOUND VELOCITY FOR PETROLEUM PRODUCTS ...C-1

APPENDIX D:FLUID SOUND VELOCITIESAND KINEMATIC VISCOSITIES ........................................D-1

APPENDIX E:GLOSSARY ................................................................................E-1

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APPENDIX F:CONFIGURING THE DCT SERIES FLOWMETERWITH TimeGATE ™..................................................................F-1

F.1 THE TimeGATE ™ ENVIRONMENT ...........................................................................F-1F.1.1 DEFINITIONS ......................................................................................................................................... F-1F.1.2 MOUSE OPERATION ............................................................................................................................ F-4F.1.3 KEYBOARD OPERATION .................................................................................................................... F-4

F.2 INSTALLING TimeGATE ™ ..........................................................................................F-4

F.3 RUNNING TimeGATE ™ ................................................................................................F-5

F.4 CONFIGURING THE FLOWMETER .........................................................................F-6F.4.1 PIPE OPTION GROUP............................................................................................................................ F-9F.4.2 LINER OPTION GROUP ...................................................................................................................... F-11F.4.3 FLUID OPTION GROUP ...................................................................................................................... F-13F.4.4 TRANSDUCER OPTION GROUP ....................................................................................................... F-14F.4.5 CALIBRATION OPTION GROUP....................................................................................................... F-15F.4.6 FLOW OPTION GROUP....................................................................................................................... F-19F.4.7 TOTALIZER OPTION GROUP ............................................................................................................ F-22F.4.8 4-20 mA CURRENT LOOP OPTION GROUP.................................................................................... F-24F.4.9 RELAYS OPTION GROUP .................................................................................................................. F-27F.4.10 OPTIONS GROUP............................................................................................................................... F-29F.4.11 DISPLAY OPTION GROUP ............................................................................................................... F-30

F.5 VIEWING THE FLOW DATA IN THE GRAPH TAB ............................................F-31

F.6 RS232 COMMUNICATIONS ......................................................................................F-34F.6.1 WHEN TimeGATE™ CANNOT CONNECT ...................................................................................... F-34F.6.2 CHANGING THE BAUD RATE ON THE FLOWMETER ................................................................. F-35F.6.3 RUNNING TimeGATE™ IN AN OFFLINE SESSION ....................................................................... F-36F.6.4 COMMUNICATIONS TEST MESSAGE ............................................................................................. F-36

F.7 MANUFACTURING DATA.........................................................................................F-37

F.8 MASTER ERASE FUNCTION....................................................................................F-38

F.9 UPGRADING THE FLOWMETER SOFTWARE....................................................F-40

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PRODUCT OVERVIEW

1.1 IntroductionThe DCT-7088 Digital Correlation Transit Time Flowmeter is a member of the Polysonicsseries of Tyme Flyte ultrasonic instruments. This microprocessor-based instrument is usedto measure the flow of clean, homogeneous liquids (liquids without large concentrations ofsuspended particles or gasses such as air bubbles.) The flowmeter is non-invasive, whichmeans that it measures flow from outside the pipe. Its transducers can be mounted to a pipewithin a matter of minutes, and flow measurements may be made without stopping theflow or physically contacting it in any way.

The flowmeter is configured using an integrated keypad and display for entering variablessuch as pipe size, material, wall thickness, and fluid type (Chapter 3). The flowmeterdisplays the flow rate and the totalized volume is either English or metric engineeringunits. In addition, it can be remotely configured and monitored via the RS232 interfacemode using the PolyLink flowmeter data link utility (Appendix A). Alternatively, theflowmeter can be configured and the signal can be graphically analyzed in a MicrosoftWindows® environment using the Polysonics TimeGATE ™ utility (Appendix F).

1.2 Theory of OperationSound waves travel in fluids at a specific velocity depending on the type of fluid. If thefluid is moving, the sound wave travels at a velocity equal to the sum of the speed of soundin the fluid and the velocity of the fluid itself. A sound wave traveling in the samedirection as the fluid flow (downstream) will arrive sooner than a sound wave travelingagainst the flow (upstream). The DCT-7088 transit time flowmeter operates by measuringthe difference in time required for sound waves to travel between externally mounteddownstream and upstream transducers (Figure 1-1). Based on the transit time of the twosound waves, the flowmeter calculates the average fluid velocity.

Several variables must be taken into consideration, however. The overall velocity of thefluid is actually made up of many individual local velocities that vary according to theirdistance from the pipe wall. The velocities in the center of the pipe are higher than thevelocities near the pipe wall. The combination of these individual velocities for a specifictype of fluid within a specific pipe yield a velocity distribution known as the flow profile(Figure 1-2). By properly configuring the flowmeter, the effects of the flow profile aretaken into consideration when calculating the mean fluid velocity. The flowmeter thenmultiplies this velocity by the pipe’s cross-sectional area to obtain volumetric flow.

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Figure 1-1 Typical Transit Time System

Figure 1-2 Flow Profiles

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1.3 Transit Time AccuracyNon-invasive ultrasonic measurements are subject to a variety of effects that can influencemeasurement accuracy. All ultrasonic instruments are velocity measuring devices and onlyinfer volumetric flow from the operator entered parameter of pipe inside diameter (ID). Asthis value is squared to get cross-sectional area, a 1% error yields a 2% error in volumetricflow. In practice, commercially fabricated pipe seldom has ID consistency much tighterthan 1% and, unless the pipe to be measured has been miked recently, this uncertainty isnot reducible through instrument calibration.

The more sophisticated transit time flowmeters incorporate flow profile corrections tocompensate for the pipe's cross-sectional velocity profile with changing Reynolds number.This requires, however, that the roughness of the inside of the pipe to be measured isknown. The instrument may well infer a roughness if none is entered by the operator, butthat is only a guess based on the characteristics of new pipe. Pipes can, of course,accumulate deposits which may not only reduce the ID, but affect the roughness as well.Errors on the order of 2% as a result of this phenomenon are not uncommon.

While other factors may influence instrument accuracy to a lesser extent, the issuesdescribed above are the major elements of the pipe dependency of absolute instrumentaccuracy. While calibration on a reference flow loop under known conditions is a usefulexercise to determine the accuracy potential of an instrument, it is not a guarantee ofabsolute accuracy on different pipes under field conditions.

1.4 Operating the FlowmeterThe flowmeter must be configured and the transducers must be properly spaced andinstalled in order for the flowmeter to detect ultrasonic signals and measure flow. Theflowmeter can be quickly set up for operation by following the minimal steps listed in theQuick Setup procedure (Section 3.5). The flowmeter should also be calibrated for thespecific site if accuracy at very low flow rates is important (Chapter 5).

1.4.1 RS232 PORT

The flowmeter can be configured and monitored locally with the integrated keypad anddisplay or remotely through the RS232 port. RS232 communications with the flowmeterrequires an IBM-compatible PC and the PolyLink or TimeGATE ™ flowmeter utilities. Inaddition to remote monitoring and configuring functions, PolyLink allows data log files tobe transferred to the PC. These files can then be imported into a word processor, aspreadsheet, or simply printed out. Refer to Appendix A for more information on PolyLinkand to Appendix F for more information on TimeGATE ™.

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1.5 PowerThe DCT-7088 is a DC powered instrument that normally operates from an internal 12 voltbattery supplied with the unit. It may also be powered by one of the following sourceswhich connect to the 12-15 volt DC input on the breakout box:

! Battery charger/AC adapter (converts a 90 to 264 volt AC, 50/60 Hertz, 15 watt inputto a 15 volt DC output)

! Automobile cigarette lighter adapter (provides a 12 volt DC output from an automobilecigarette lighter jack)

If the battery charger/AC adapter is connected, it simultaneously powers the flowmeter andrecharges (or maintains the charge) on the internal battery. The battery charges at a slowerrate when the battery charger/AC adapter is used to both power the unit and charge thebattery.

For more information on the breakout box, refer to Section 2.1.

1.5.1 FUSES

The design of the flowmeter includes the following 3-ampere fuses:

! One located on the front panel of the flowmeter in the upper right corner

(Figure 1-3) to protect against overcurrent or short circuits from the internal battery

! One located in the breakout box to protect against overcurrent from the output of thebattery charger/AC adapter

The fuse inside the breakout box is accessible by removing the four screws securing itscover. Power should be disconnected prior to replacing any fuse.

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Figure 1-3 External Features of the DCT-7088

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1.6 External FeaturesThe following is a description of the external features of the DCT-7088 (Figure 1-3):

Printer Port

The printer port provides an output for the optional external thermal printer for printingflow data, diagnostic messages, etc. The printer port connects to a special printer cablewhich has a 3-pin round connector on the flowmeter end and a DB9 connector on theprinter end. For more information on the printer, refer to Section 2.1.2.

ON/OFF Keys

The flowmeter is turned on or off by pressing these keys.

Battery Low Light

If the flowmeter is not connected to the battery charger/AC adapter, the red Battery Lowlight comes on after approximately 7 or 14 hours of operation depending upon the size ofthe internal battery. To protect the battery from excessive discharging, the flowmeterautomatically shuts down after approximately one additional hour. The battery must thenbe recharged.

Charging Light

The yellow Charging light indicates when the battery is charging. (The flowmeter must beconnected to the battery charger/AC Adapter.) The battery charges at a slower rate whenthe flowmeter is in operation. The battery cannot be overcharged.

Instrument On Light

The green Instrument On light comes on whenever the flowmeter is on (after the ON key ispressed).

Fuse

The 3 ampere, 250 volt fuse located on the front panel protects the flowmeter from batteryovercurrent and short circuits. Another fuse with the same rating is located in the breakoutbox (Section 1.5.1).

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Display

The display is a 40-character liquid crystal display (LCD). All messages, menu data, andalarms are shown on the display. It is readable in direct sunlight and has a backlight forviewing in low-light conditions. In addition, the contrast is adjustable. The backlightremains on for approximately 2 minutes after the last key is pressed, then turns off toconserve battery power. Refer to Section 3.1 for more information on the display.

Keypad

The flowmeter has a pressure-sensitive membrane keypad, which is used to access menus,enter configuration parameters, and control the functions of the flowmeter. Refer toSection 3.1 for more information on the keypad.

Downstream Transducer Connector and Upstream Transducer Connector

There are two BNC connectors located on the right side of the flowmeter that connect tothe upstream and downstream transducer cables. When viewing the case in the normalopened position (Figure 1-3), the upstream connector is in the upper position and thedownstream connector is beneath it.

Breakout Box Interface Connector

The breakout box interface connector connects the flowmeter to the breakout box. Thebreakout box provides a variety of functions including connecting DC voltage from thebattery charger/AC adapter to the flowmeter to charge the battery. Refer to Section 2.1 formore information on the breakout box functions.

1.7 Software UpgradesThe flowmeter can be upgraded in the field by downloading new software into its FLASHmemory (Appendices A and F). The software version number that is installed in theflowmeter is displayed in Menu 94. Contact the local Polysonics representative or thefactory to determine the current version available. Software updates are provided either bynotification from the factory or at the request of the user.

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1.8. Standard Configuration and OptionsThe standard configuration and options for the DCT-7088 flowmeter are designated by themodel code numbers listed in Table 1-1. For example, the model code DCT7088 1 B 16Adescribes a flowmeter with the following options:

! 8-hour battery

! Windows 95® version of the TimeGATE ™ configuration and analysis program

! 16 feet of transducer cable

Table 1-1DCT-7088 Flowmeter Standard Configuration and Options

DescriptionModel CodeNumber

Portable Digital Correlation Transit Time Flowmeter 1 DCT-7088

TimeGATE ™ Configuration and Analysis Program 1

! Windows® 3.11 version 2

! Windows 95® version

A

B

Battery Duration

! 8 hours 1

! 16 hours

1

2

Transducer Cable Length

! 16 ft (5 m) 1

! Additional cable length 316A

XXXA

Additional Options

! Ultrasonic Thickness Gauge (UTG), English units

! Ultrasonic Thickness Gauge (UTG), Metric units

! Thermal printer kit

! High temperature transducer block 4

0704/0188

0704/0187

22334-0001

20739-0001

1 Standard items.

2 The Windows® 3.11 version of TimeGATE ™ is compatibles with Windows® versions 3.1 and higher.

3 Additional cable is available in increments of 10 feet to a maximum length of 1,000 feet.

4 High temperature transducer blocks allow transducer mounting with pipe skin temperatures of-40 to +470°F (-40 to +243°C).

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1.9 Technical SpecificationsTable 1-2 lists the physical, performance, and functional specifications of the DCT-7088:

Table 1-2DCT-7088 Flowmeter Specifications

Performance specifications 1

Flow range ±0 to 50 FPS (±0 to 15 MPS).

Accuracy ±0.5% of velocity or ±0.05 FPS (0.0152 MPS), typical on a calibratedsystem/digital output

Sensitivity 0.001 FPS (0.3 mm per sec) at any flow rate including zero.

Linearity 0.1% of scale, digital output

Pipe size 1 to 200 in (25 mm to 5 m).

Fluid Homogeneous liquids without gas bubbles.

Functional specifications

Outputs ! 4 to 20 mA (into 1,000 ohms), 12 bit, isolated.

! RS232 serial interface.

Power supply Built-in lead acid gel battery, providing:

! 8 hours continuous operation (standard).

! 16 hours continuous operation (optional).

Keypad 19-key with tactile action.

Display 40-character, 2-line, alphanumeric, backlit LCD.

Screens include present and total flow, velocity, signal strength, anddelta T.

Data logger " 65,000 data points, time stamped.

Programmable in 1-second intervals.

Temperature 2 Instrument: -5 to +140°F (-20 to +60°C).

Transducers: ! -40 to +300°F (-40 to +150°C), standard.

! -40 to +470°F (-40 to +243°C, when using optional high-temperature transducer blocks.

Physical specifications

Transmitter NEMA 6 (IP67), waterproof against accidental immersion and splashproofwith lid open.

Transducers Encapsulated design.

Standard cable length: 16 ft (5 m).

Transmitter weight Approximately 11 lbs (4.9 kg) with standard 8-hour battery.

Approximately 15 lbs (6.8 kg) with optional 16-hour battery.

1 Performance specifications are established under reference conditions.

2 Consult factory for higher operating temperatures than those listed.

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SYSTEM COMPONENTS

2.1 Breakout Box ComponentsThe breakout box components are illustrated in Figure 2-1. The breakout box connects theflowmeter through the 7-pin circular breakout box connector . The breakout boxprovides an interface for the following connections:

! 15 volt DC power input from the battery charger/AC adapter (Section 1.5)

! 6 volt DC output cable for charging the printer battery (Section 2.1.2)

! RS232 serial port for transferring data log files, for providing connection to a remoteterminal, and for other computer applications (Appendices A and F)

! 4-20 milliampere current loop output terminals (Chapter 6)

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Figure 2-1 Breakout Box Components

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2.1.1 BATTERY CHARGER/AC ADAPTER

The battery charger/AC adapter has a removable AC power cable and converts 110-250volt AC to 15 volts DC. The DC power output cable connects to the breakout box at theDC input connector .

When connected to the breakout box, the battery charger/AC adapter performs thefollowing functions:

! Charges the flowmeter battery through the 7-pin circular connector

! Provides immediate power to operate the unit if the battery is discharged

! Provides voltage to charge/power the printer as required

! Provides the driving voltage for the 4 to 20 mA current output if configured to drive theloop.

2.1.2 PRINTER

An optional external thermal printer is available for use with the flowmeter for printingflow data, diagnostic messages, etc. For complete printer operating instructions, refer tothe instruction manual supplied with the printer.

Charging the Printer Battery

The printer battery is charged by connecting the printer to the printer power cable on thebreakout box (when the battery charger/AC adapter is connected).

CAUTION:

Note the following precautions:!The printer battery charge time for a fully discharged battery is 15

hours. To avoid damage to the battery, do not charge for more than24 hours.

!Do not connect the battery charger/ac adapter directly to the printerto charge the printer battery. The voltage and polarity output of thecharger do not match the required input of the printer. If they aredirectly connected, the printer battery can explode or the printer canbe seriously damaged.

Printing Procedure

To print from the flowmeter:

1. Connect the printer cable from the serial port on the printer to the printer port on theupper left of the flowmeter’s control panel (Figure 1-3).

NOTE: The printer port on the panel is covered with a protective metal cap.)

2. Follow the procedures for using the print menus in Section 3.6.14.

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2.2 Slide TrackThe transducer slide track (Figure 2-2) comes standard with the DCT-7088. In manyapplications, the slide track allows the user to accurately space the transducers beforemounting them as a single assembly on the pipe. Refer to Section 4.2.1 for procedures andlimitations related to the slide track.

Figure 2-2 Slide Track

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2.3 Current Loop Wiring and Current Loop Powering OptionThe flowmeter has a 4 to 20 milliampere (4 to 20 mA) current loop output. The currentloop can be selected to be self-powered or loop-powered. The wiring connections to thecurrent loop vary depending on which powering option is selected.

NOTE: For information on calibrating and testing the current loop and setting the currentloop span, refer to Chapter 6.

The flowmeter comes shipped with the current loop self-powered. For loop-poweredoperation, the current loop must be driven from an external supply. In this case theflowmeter acts as a passive two-wire transmitter. The current loop powering option is setby moving jumpers on the current loop board which is located inside the breakout box.(Four screws must be removed from the back of the breakout box to access the jumpers.)A diagram of the jumper settings is located on the inside cover of the breakout box and isalso illustrated in Figure 2-3.

NOTE: The current loop output is rated for a loop resistance of up to 1000 ohms and isisolated for up to 5 kV when loop powered.

CAUTION:

To avoid possible damage to the flowmeter due to an accidental short,disconnect power before removing the back cover of the breakout box.(Disconnect the breakout box from the flowmeter and from the ACadapter/battery charger.)

Figure 2-3 Current Loop Power Jumper Settings for DCT-7088

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After the loop powering option has been set, the current loop wiring should be connected.The current loop has an input terminal and an output terminal (indicated as IN and OUT onthe outer breakout box label). Connections for the self-powered option are illustrated inFigure 2-4 and connections for the loop-powered option are illustrated in Figure 2-5.

Figure 2-4 Wiring Diagram for Self Powered Current Loop

Figure 2-5 Wiring Diagram for Loop Powered Current Loop

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CONFIGURING AND OPERATING THEFLOWMETER

This chapter provides step by step procedures for configuring and operating the instrumentwith the keypad and display. The configuration settings are stored in non-volatile memoryto protect them in the event of a power failure.

After the flowmeter has been configured, the transducers are spaced and installed on thepipe (Chapter 4). If accuracy at low flows is important, the flowmeter should also becalibrated (Chapter 5).

NOTE: The instrument can also be configured through the RS232 interface with an IBM-compatible PC using the PolyLink or TimeGATE ™ utilities (Appendices A

and F).

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3.1 Keypad and Display

The keypad provides access to the microprocessor for configuring the flowmeter. Thekeypad entries are viewed on the instrument’s 40-character LCD display. Duringoperation, the display indicates the flow rate and totalizer values. The display is backlit forease of viewing in low-light conditions and has a variable contrast setting (Section 3.1.2).

3.1.1 KEYPAD AND DISPLAY COMPONENTS

The components of the keypad and display (Figure 3-1) are as follows:

! LCD Display

! Numeric keys , including the 0 through 9 keys and the decimal (.) key.

! UP, DOWN, LEFT, and RIGHT ARROW keys for scrolling.

! ENTER key , which operates like the ENTER key on a computer.

! ERASE key which operates like the BACKSPACE key on a computer. The ERASEkey deletes the last entered value from the keypad. In addition, pressing ERASE frommost setup and diagnostic menus accesses the Main Menu. Pressing ERASE a secondtime accesses Menu 00 (the Flow Rate and Net Totalizer display).

! MENU key , which provides access to the flowmeter’s setup and diagnostic menus(Section 3.3)

Figure 3-1 Keypad and Display

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3.1.2 DISPLAY CONTRAST AND BACKLIGHT

The display is backlit for ease of viewing in low-light conditions. To save battery life, thebacklight shuts off automatically after several minutes have passed without a keypad entry.The display has a variable contrast setting. Contrast may need to be adjusted as theambient temperature changes from very hot to very cold.

To adjust the contrast:

1. Press MENU.

2. Press the +/- key.

The following is displayed:

LCD Contrast

3. Press the RIGHT or LEFT ARROW keys to adjust the contrast.

4. Press ENTER when complete.

3.2 Direct Menu AccessEach setup and diagnostic menu has a unique two-digit address allowing the menus to bedirectly accessed.

To directly access a menu:

1. Press MENU.

The letter M appears in the lower right corner of the display:

M

2. Enter the desired menu’s two-digit address.

NOTE: The address must be entered while the M is displayed (approximately 4seconds). If the M is no longer displayed, MENU must be pressed again beforeentering the address.

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Table 3-1 provides a list of the menu addresses:

Table 3-1Menu Addresses

PRIMARY DISPLAYS:Flow/Net Totalizer (Menu 00)Flow/Velocity (Menu 01)Flow/Positive Totalizer (Menu 02)Flow/Negative Totalizer (Menu 03)Signal Strength/Low Signal Cutoff (Menu 04)

PIPE:Pipe OD (Menu 10)Pipe Wall Thickness (Menu 11)Pipe ID (Menu 12)Pipe Material (Menu 13)Pipe Sound Speed (Menu 14)Pipe Inside Roughness (Menu 15)

LINER:Liner Material (Menu 16)Liner Thickness (Menu 17)Liner Sound Speed (Menu 18)Liner Inside Roughness (Menu 19)

FLUID:Fluid Type (Menu 20)Fluid Sound Speed (Menu 21)Fluid Viscosity (Menu 22)

TRANSDUCER:Transducer Type (Menu 23)Transducer Mounting (Menu 24)Transducer Spacing (Menu 25)

FLOW:Flow Units (Menu 30)Max Flow Range (Menu 31)Min Flow Range (Menu 32)Damping (Menu 33)Low Flow Cutoff (Menu 34)Low Signal Cutoff (Menu 35)

TOTALIZER:Totalizer Units (Menu 36)Totalizer Multiplier (Menu 37)Net Totalizer (Menu 38)Positive Totalizer (Menu 39)Negative Totalizer (Menu 40)Totalizer Reset (Menu 41)

OPTIONS:Measurement Units (Menu 42)Site Parameters (Menu 43)RS232 Configuration (Menu 46)Change System Password (Menu 47)Change Scale Factor Password (Menu 48)Unit ID (Menu 49)

CALIBRATION (Menu 50):Zero Set (Menu 51)Scale Factor (Menu 52)Sound Speed Compensation (Menu 53)Date and Time (Menu 54)

CURRENT LOOP (Menu 56):Current Loop Span (Menu 57)Current Loop Calibration (Menu 58)Current Loop Test (Menu 59)

ALARMS (Menu 70):Program Alarms (Menu 71)View Alarms (Menu 72)

DATA LOGData Log Setup (Menu 80)Data Log Interval (Menu 81)

DIAGNOSTICS:Signal Strength/Margin (Menu 90)Delta Time/Fluid Sound Speed (Menu 91)Reynolds #/Profile Factor (Menu 92)Current Loop Output (Menu 93)Software/Firmware Rev. Level (Menu 94)

PRINT:Print Log Setup (Menu 96)Prints Settings (Menu 97)Prints Diagnostics (Menu 98)Prints Current Screen (Menu 99)

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3.3 Accessing the Menus by ScrollingA menu can be accessed directly with a two digit address (Section 3.2) or by scrollingthrough the flowmeter’s menu structure. The menus are organized into the following basiclevels:

! Main Menu

! Sub-menus

! Primary Displays, setup menus, and diagnostic menus

The Main Menu displays various sub-menus. The sub-menus contain the individual setupand diagnostic menus.

3.3.1 SCROLLING THROUGH THE MAIN MENU AND SUB-MENUS

To access the Main Menu from any screen:

1. Press the MENU key twice.

The Main Menu is displayed. The Main Menu contains sub-menus, which are precededby a solid square !, as follows:

Main Menu

!!!!Pipe !!!!Liner

The following additional sub-menus are displayed in the Main Menu by scrolling with theUP or DOWN ARROW keys:

!!!!Pipe !!!!Liner

!!!!Fluid !!!!Xducer

!!!!Flow !!!!Total.

!!!!Options !!!!Calibr.

!!!!4-20mA !!!!Alarms

!!!!DataLog. !!!!Diagn

2. Move the cursor in the Main Menu using the UP or DOWN ARROW keys.

3. When the desired sub-menu is highlighted, press ENTER.

The first menu of the selected sub-menu is displayed. For example, if the sub-menuFLOW were selected, the following menu would be displayed:

Flow Units

*Gallons

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3.3.2 SCROLLING THROUGH PRIMARY DISPLAYS, SETUP MENUS, ANDDIAGNOSTIC MENUS

The user can move from one Primary Display, setup menu, or diagnostic menu to anotherwithin the same sub-menu by scrolling. Pressing the DOWN ARROW key displays the nextdisplay or menu, while pressing the UP ARROW key displays the previous one.

3.4 Entering Data in the Setup MenusThis section provides basic procedures for entering configuration data which is done in thesetup menus. Some setup menus allow a numeric value to be entered, while others offernon-numeric selections. Refer to Section 3.6 for more detailed information on specificmenus.

The following is an example of a setup menu which requires a numeric entry:

PIPE ID

4.02 INCHES

In a non-numeric selection menu, an asterisk is displayed to the left of the selectioncurrently entered in the flowmeter. The following is an example of a non-numeric selectionsetup menu:

Pipe Material

*CARBON STEEL

To use the setup menus to configure the flowmeter:

1. Access the setup menus one at a time using the direct menu access method(Section 3.2) and/or the scrolling method (Section 3.3).

IMPORTANT: As a minimal requirement, the setup menus that are listed in the QuickSetup procedure (Section 3.5) must be configured.

2. If the setup menu requires a numeric entry, use the numeric keys and press ENTERwhen complete. (If an error is made while entering a numeric value, use the ERASEkey to delete it.)

3. If the setup menu offers a non-numeric selection:

! Press ENTER.

The asterisk changes to a flashing cursor.

! Use the arrow keys to scroll through the available selections.

! When the cursor is to the left of the desired selection, press ENTER to select it.

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4. Complete the configuration process by accessing one of the Primary Displays(Menu 00 through 04).

IMPORTANT: The flowmeter will not use the new parameters until one of the PrimaryDisplays is accessed.

3.5 Quick SetupThe Quick Setup procedure provides the minimal steps required for configuring theflowmeter to enable it to calculate transducer spacing, acquire ultrasonic signal, andmeasure flow. The Quick Setup procedure is also provided on the Quick Setup Card.

The Quick Setup procedure is as follows:

1. Select a proper transducer site, following the guidelines in Section 4.1.

2. Enter the pipe OD (Menu 10).

3. Enter the pipe ID (Menu 12).

4. Enter the pipe material (Menu 13).

5. Enter the liner material if any (Menu 16).

6. Enter the liner thickness if any (Menu 17).

7. Enter the fluid type (Menu 20).

8. Enter the transducer type (Menu 23).

9. Enter the transducer mounting method (Menu 24).

Once these critical setup parameters are entered, the flowmeter calculates the propertransducer spacing. The spacing is displayed in Menu 25.

10. Enter the flow rate units (Menu 30).

11. Install the transducers on the pipe, using the spacing measurement provided by theflowmeter (Section 4.2) and connect the transducer cables to the flowmeter.

12. Access one of the Primary Displays (Menu 00 through 04) to complete theconfiguration process.

The flowmeter is now capable of measuring velocity and flow.

IMPORTANT: If any of the above setup parameters are changed, the flowmeter stopsmeasuring flow until the new value is entered and until one of the PrimaryDisplays (Menu 00 through 04) is accessed to accept the new value.

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3.6 Primary Displays, Setup Menus, and Diagnostic MenusThis section describes the functions of the Primary Displays, the setup menus, and thediagnostic menus. These displays and menus are described in numerical order according totheir menu addresses. The menus are also are listed under their appropriate sub-menus (forexample PIPE or LINER). These displays and menus can be accessed using cursor scrolling(Section 3.3) or direct access (Section 3.2).

The Primary Displays are for viewing only and are not configurable. The setup menus areused primarily to enter configuration data or to view the flowmeter’s current configurationsettings. Diagnostic menus are used for viewing various diagnostic parameters and are notconfigurable. In addition, certain data may be printed by entering one of three availableprint commands (Section 3.6.14).

IMPORTANT: The flowmeter ships from the factory with the system password and scalefactor password disabled. To maximize security, new passwords should beentered immediately. Refer to Menus 47 and 48 in Section 3.6.8.

3.6.1 PRIMARY DISPLAYS

This section describes the Primary Displays whichdisplay the values for the flow rate, totalizers, velocity,signal strength, or low signal cutoff (Menu 00through 04). These displays are for viewing only.(They are not configurable.)

NOTE: Refer to Section 3.6.7 for information onenabling and configuring the totalizers.

Flow/Net Totalizer (Menu 00)

The Flow/Net Totalizer display is the standard displayused under normal operating conditions. It displays theflow rate and the net totalizer value. If the net totalizeris not currently enabled, this display indicates the lastnet totalized value.

Flow/Velocity (Menu 01)

The Flow/Velocity display indicates the flow rate andfluid velocity. Velocity is displayed in feet per second(FPS) if ENGLISH is selected as the measurement unitin Menu 42 and in meters per second if METRIC isselected.

Flow= 0.00 GPM

Net 0 x0.1Gal

Flow= 0.00 GPM

Vel = 0.00 FPS

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Flow/Positive Totalizer (Menu 02)

The Flow/Positive Totalizer display indicates the flowrate and the totalized flow in the positive flowdirection. This display is available only if the positivetotalizer is enabled in Menu 39.

Flow/Negative Totalizer (Menu 03)

The Flow/Negative Totalizer display indicates the flowrate and the totalized flow in the negative flowdirection. This display is available only if the negativetotalizer is enabled in Menu 40.

Signal Strength/Low Signal Cutoff (Menu 04)

The Signal Strength/Low Signal Cutoff displayindicates the values for signal strength and low signalcutoff.

NOTE: Refer to Menu 35 for information on settingthe low signal cutoff.

3.6.2 PIPE SETUP MENUS

The PIPE sub-menu contains the setup menus relatedto the pipe parameters such as pipe inner diameter (ID)and pipe material.

The pipe inner diameter (ID), outside diameter (OD),and pipe wall thickness parameters are entered in thissub-menu. If any two of these three parameters areentered, the flowmeter calculates the third remainingparameter automatically. Actual measurements (notnominal) must be entered, and precision is important;accuracy is directly affected by the square of any errorin pipe dimensions.

Pipe OD (Menu 10)

This menu is used to enter the pipe outside diameter(OD). Alternatively, the pipe circumference can beentered and the flowmeter will calculate the pipe ODautomatically.

Flow= 0.00 GPM

Pos 0 x0.1Gal

Flow= 0.00 GPM

Neg 0 x0.1Gal

SigStr = 0

Cutoff = 2

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To enter the pipe OD:

1. Access Menu 10.


2. Enter the value for the pipe OD and press ENTER.

3. Press the DOWN ARROW key.


4. Select one of the following:

! ACTUAL if the value entered for the pipe OD isan actual measurement

! CIRCUM if the value entered is the pipecircumference

Pipe Wall Thickness (Menu 11)

This menu is used to enter the wall thickness of thepipe.

Pipe ID (Menu 12)

This menu is used to enter the pipe inner diameter(ID).

Pipe Material (Menu 13)

This menu is used to select one of the following pipematerials:! CARBON STEEL! STAINLESS STEEL! CAST IRON! DUCTILE IRON! COPPER! PVC! PVDF LOW DENSITY! PVDF HI DENSITY! ALUMINUM! ASBESTOS! FIBERGLASS-EPOXY! OTHER

Pipe OD

13.87 inches

Select Option

!!!!Actual !!!!Circum

Pipe Wall Thickness

0.38 inches

Pipe ID

13.12 inches

Pipe Material

*CARBON STEEL

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NOTE: The selection OTHER denotes any materialnot listed. If OTHER is selected, the pipesound speed (Menu 14) and pipe insideroughness (Menu 15) must be entered.

Pipe Sound Speed (Menu 14)

This menu is configurable only if OTHER was selectedfor the pipe material in Menu 13. The pipe sound speedof the OTHER material should be entered in this menu.If OTHER was not selected, this menu is available onlyby the direct access method and not by scrolling. Inthis case, this menu functions as a view-only display toindicate the pipe sound speed from the flowmeter’sdata base.

Pipe Inside Roughness (Menu 15)

This menu is configurable only if OTHER was selectedfor the pipe material in Menu 13. The pipe insideroughness of the OTHER material should be entered inthis menu. Data on this parameter is available from theCameron Hydraulic Data Book published by Ingersoll-Rand. If OTHER was not selected, this menu isavailable only by the direct access method and not byscrolling. In this case, this menu functions as a view-only display to indicate the pipe inside roughness fromthe flowmeter’s data base.

NOTE: The number entered for pipe roughness is notimportant on lined pipes. In this case, the linerinside roughness should be entered inMenu 19.

3.6.3 LINER SETUP MENUS

The LINER sub-menu contains the setup menus relatedto the liner, such as material and thickness.

Pipe Sound Speed

10440 FPS

Pipe Roughness

0.000150 Ft

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Liner Material (Menu 16)

This menu is used to select one of the following linermaterials:

! NONE (no liner)

! TAR EPOXY

! RUBBER

! MORTAR

! POLYPROPYLENE

! POLYSTYROL

! POLYSTYRENE

! POLYESTER

! POLYETHYLENE

! EBONITE

! TEFLON

! OTHER

NOTE: The selection OTHER denotes a material notlisted. If OTHER is selected, the liner soundspeed (Menu 18) and liner inside roughness(Menu 19) must be entered.

Liner Thickness (Menu 17)

This menu is used to enter the thickness of the liner.

Liner Sound Speed (Menu 18)

This menu is configurable only if OTHER was selectedfor the liner material in Menu 16. The liner soundspeed of the OTHER material should be entered in thismenu. If OTHER was not selected, this menu isavailable only by the direct access method and not byscrolling. In this case, this menu functions as a view-only display to indicate the liner sound speed from theflowmeter’s data base.

Liner Material

*POLYETHYLENE

Liner Thickness

0.00 Inches

Liner Sound Speed

8203.00 FPS

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Liner Inside Roughness (Menu 19)

This menu is available only if OTHER was selected forthe liner material in Menu 16. The liner insideroughness of the OTHER material should be entered inthis menu. Data on this parameter is available from theCameron Hydraulic Data Book published by Ingersoll-Rand. If OTHER was not selected, this menu isavailable only by the direct access method and not byscrolling. In this case, this menu functions as a view-only display to indicate the liner inside roughness fromthe flowmeter’s data base.

3.6.4 FLUID SETUP MENUS

The FLUID sub-menu contains the setup menus relatedto the fluid being measured.

Fluid Type (Menu 20)

This menu is used to select one of the following fluidtypes:

! WATER

! SEA WATER

! KEROSENE

! GASOLINE

! FUEL OIL #2

! CRUDE OIL

! PROPANE (-45°C)

! BUTANE (0°C)

! OTHER

NOTE: The selection OTHER denotes a fluid type notlisted. If OTHER is selected, the fluid soundspeed (Menu 21) and fluid viscosity(Menu 22) must next be entered for this fluidtype.

Liner Roughness

0.001000

Fluid Type

*GASOLINE

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Fluid Sound Speed (Menu 21)

This menu is configurable only if OTHER was selectedfor the fluid type in Menu 20. The fluid sound speed ofthe OTHER fluid type should be entered in this menu.(Refer to Appendices C and D for information on fluidsound speeds.) If OTHER was not selected, this menuis available only by the direct access method and notby scrolling. In this case, this menu functions as aview-only display to indicate the fluid sound speedfrom the flowmeter’s data base.

Fluid Viscosity (Menu 22)

This menu is configurable only if OTHER was selectedfor the fluid type in Menu 20. The kinematic viscosityof the OTHER fluid type should be entered in thismenu. (Refer to Appendices C and D for informationon fluid viscosities.) If OTHER was not selected, thismenu is available only by the direct access method andnot by scrolling. In this case, this menu functions as aview-only display to indicate the viscosity of theselected fluid from the flowmeter’s data base.

3.6.5 TRANSDUCER SETUP MENUS

The XDUCER sub-menu contains the setup menusrelated to transducer type, mounting method, andspacing requirements.

Transducer Type (Menu 23)

This menu is used to enter the type of transducerconnected to the flowmeter. The selections are:

! STANDARD

! HI-TEMP

STANDARD should be selected unless the optionalhigh-temperature transducer blocks are used(Section 4.5).

Fluid Sound Speed

4863.33 FPS

Fluid Viscosity

1.130 cSt

Transducer Type

*Standard Hi-Temp

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Transducer Mounting (Menu 24)

This menu is used to select one of the followingtransducer mounting methods:

! V

! W

! Z

Refer to Section 4.4 for more information on thetransducer mounting methods.

Transducer Spacing (Menu 25)

This view-only menu indicates the required spacingbetween the transducers. This spacing is calculated bythe flowmeter once the parameters listed in the QuickSetup procedure have been entered. Refer toSection 4.2 for more information on transducerspacing.

3.6.6 FLOW SETUP MENUS

The FLOW sub-menu contains the setup menus relatedto flow.

Flow Units (Menu 30)

This menu is used to select the flow rate units.Volumetric units are displayed first, followed by theassociated time (per) units.

To select the flow rate units:

1. Select one of the following volumetric units:

! GALLONS

! LITERS

! MGAL (million gallons)

! CUBIC FT

! CUBIC METERS

! ACRE FT

! OIL BARRELS

! LIQUOR BARRELS

! FEET

! METERS

Transducer Mount

*V Mt. Z Mt. W Mt.

Transducer Spacing

5.93 Inches

Flow Units

*Gallons

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4. Select one of the following time unit (per) options:

! SEC

! MIN

! HR (million gallons)

! DAY

Max Flow Range (Menu 31) andMin Flow Range (Menu 32)

These menus are used to enter the minimum andmaximum flow values for setting the volumetric flowrange. Setting the optimum flow range generallyimproves the flowmeter’s response time.

NOTE: Whenever the pipe ID is changed, theflowmeter returns the volumetric flow rangeto its default settings. The default settings arethe minimum and maximum flows for thenew pipe ID that occur at +32 and -32 FPS(+9.76 and -9.76 MPS).

Damping (Menu 33)

This menu is used to enter the value for the dampingcoefficient. The damping coefficient suppresses shortterm fluctuations in the indicated flow rate. Thedisplayed flow rate and the 4 to 20 mA current loopoutput is a moving average of the last n seconds wheren is the damping value. Increasing the coefficientincreases the response time to changes. The coefficientis adjustable from 1 to 99 seconds in 1-secondincrements. Damping should be kept at a minimumunless the velocity fluctuates wildly. If so, dampingshould be increased just enough to reduce thefluctuation to an acceptable degree.

Flow Units Per

Sec *Min Hour

Max Flow

2000.00 GPM

Min Flow

-2000.00 GPM

Damping

5 secs

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Low Flow Cutoff (Menu 34)

When a zero flow condition occurs (for example, asthe result of a pump being shut off), internal sloshing,check valve leakage, and other fluid movement canprevent the flowmeter from reading total zero. Thisphenomenon can result in totalizer errors.

These errors can be minimized by entering a low flowcutoff (a minimum acceptable value for flow) in thismenu. Setting a low flow cutoff drives the flowmeterto zero for flow rates at or below that value. If the flowrate (regardless of direction) falls below the low flowcutoff value, the instrument’s indicated flow is drivento zero and the totalizers stop incrementing.

For example, if a low flow cutoff of 0.1 foot persecond (.03 meters per second) is entered, theinstrument would be driven to zero for flow rates lessthan 0.1 foot per second in the positive direction andgreater than -0.1 foot in the negative direction(Figure 3-2).

-0.3 -0.2 -0.1 0 +0.1 +0.2 +0.3

Zero flow displayed here

Figure 3-2 Low Flow Cutoff (example)

NOTE: The default setting for the low flow cutoff is1.0.

Low Signal Cutoff (Menu 35)

Empty pipes or solids, bubbles, or voids in the flowstream may cause temporary drops in signal strengthand erroneous readings. The effect of these dropoutscan be minimized by setting a low signal cutoff.Setting a low signal cutoff (a minimum acceptablesignal amplitude), drives the flowmeter to theloss-of-signal (LOS) condition.

Low Flow Cutoff

0.00 GPM

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The flowmeter’s response to the LOS condition maybe programmed as follows:

! Drop the reading to zero

! Hold the last valid reading (but continue to totalize)

In addition to these two options, an alarm can beactuated based on the low signal cutoff(Section 3.6.11).

To set the low signal cutoff:

1. Access Menu 35:

2. Enter the low signal cutoff and press ENTER.


3. Select one of the following:

! ZERO (to drop the reading to zero during anLOS condition)

! HOLD (to hold the last valid reading during anLOS condition)

3.6.7 TOTALIZER SETUP MENUS

The TOTAL sub-menu contains the setup menus forconfiguring and resetting the totalizers. There are threetotalizers which may be enabled:

! Positive totalizer

! Negative totalizer

! Net totalizer.

NOTE: If a totalizer is merely disabled, it stopstotalizing but is not reset to zero. The totalizerreset function is available in Menu 41.

Low Signal Cutoff

0%

Low Signal Action

*Zero Hold

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Totalizer Units (Menu 36)

This menu is used to select one of the following flowunits used by the totalizers:

! GALLONS

! LITERS


! CUBIC FT

! CUBIC METERS

! ACRE FT

! OIL BARRELS

! LIQUOR BARRELS

NOTE: The flow unit selected for the totalizer displaymay be different from the flow unit selectedfor the flow rate display.

Totalizer Multiplier (Menu 37)

The totalizer value can be displayed with one ofseveral multiplier values. For example, 700 liters canbe displayed as 700 “single liters” (if the multipliervalue is X1) or 7 “hundreds of liters” (if the multipliervalue is X100).

The following totalizer multiplier values can beselected:

! X 0.01

! X 0.1

! X 1

! X 10

! X 100

! X 1000

! X 10000

Totalizer Units

*Gallons

Totalizer Mult.

*x0.01 x0.1

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Net Totalizer (Menu 38)

This menu is used to enable or disable the net totalizer.The net totalizer provides the difference between thepositive and negative flow values. For example, ifthere are 1000 gallons of flow in the negative directionand 3000 gallons of flow in the positive direction, thenet totalizer indicates 2000 gallons of net flow.Selecting ON enables the net totalizer, while selectingOFF disables it.

Positive Totalizer (Menu 39)

This menu is used to enable or disable the positivetotalizer. The positive totalizer tracks the flow thatmoves in the positive direction (from the upstreamtransducer to the downstream transducer). It is notaffected by flow in the opposite (downstream)direction. Selecting ON enables the positive totalizer,while selecting OFF disables it.

Negative Totalizer (Menu 40)

This menu is used to enable or disable the negativetotalizer. The negative totalizer tracks the flow thatmoves in the negative direction (from the downstreamtransducer to the upstream transducer). It is notaffected by flow in the opposite (upstream) direction.Selecting ON enables the negative totalizer, whileselecting OFF disables it.

Totalizer Reset (Menu 41)

This menu is used to reset one or all of the totalizers.

To reset a totalizer, select one of the following andpress ENTER:

! ALL (all totalizers)

! NET (net totalizer only)

! POS (positive totalizer only)

! NEG (negative totalizer only)

Net Totalizer

*Off On

Pos. Totalizer

*Off On

Neg. Totalizer

*Off On

Totalizer Reset

!!!!All !!!!Net !!!!Pos !!!!Neg

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3.6.8 OPTIONS SETUP MENUS

The OPTIONS sub-menu contains the setup menus forseveral miscellaneous functions, such as selection ofEnglish or metric flow units, changing the system andscale factor passwords, and RS232 settings.

Measurement Units (Menu 42)

This menu is used to select one of the following typesof measurement units for the flowmeter:

! ENGLISH

! METRIC

If ENGLISH is selected, pipe dimensions are displayedin inches and velocities are displayed in feet persecond (FPS), where appropriate. If METRIC isselected, the measurements are displayed inmillimeters (mm) or meters per second (MPS).

Site Parameters (Menu 43)

This menu saves the parameters for the pipe, liner,fluid, transducer, and flow setup menus to allow theseparameters to be recalled later for a specificmeasurement site. Up to 16 different sites areavailable, and are numbered from 1 through 16. Thesite number is displayed in Menu 43 in the lower leftcorner of the screen and is followed by a colon (:). (Forexample 1: represents site number 1.)

As the setup parameters are entered in their respectivemenus during normal configuration, the sameparameters are saved simultaneously in the SiteParameters function. These site parameters are storedin whichever site is currently active (in whichever sitehas the asterisk displayed in Menu 43).

Access a different site to automatically re-enter thatsite’s stored parameters into the flowmeter formeasuring flow. To access a different site, pressENTER, scroll to the desired site, and press ENTERagain.

Measurement Units

*English Metric

Site Parameters

1:3.507 In, PVC

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NOTE: To avoid entering parameters “on top of” apreviously stored set and losing the old data,ensure that the desired site is active in Menu43 before entering the new set of parameters.

RS232 Configuration (Menu 46)

This menu is used to configure the flowmeter’s RS232port. The RS232 port allows the flowmeter to connectto an IBM-compatible PC using the PolyLink orTimeGATE ™ data link utilities (Appendices A and F).

These utilities provide features such as data log filedownloads, remote configuration and monitoring, andsoftware upgrades.

To configure the RS232 port:

1. Access Menu 46:

2. Select one of the following modes:

! TIMEGATE

! POLYLINK

3. Press the DOWN ARROW key to display the baudrate selections:

The baud rate is the only RS232 parameter that canbe selected. Parity is preset at none, the charactersize is preset at 8, and the stop bits are preset at 1.(All selections are N,8,1.)

Select one of the following baud rates:

! 1200

! 2400

! 4800

! 9600

! 19200

Change System Password (Menu 47)

This menu is used to change the system password. Thesystem password is designed to protect the flowmeter’sconfiguration parameters from unauthorized oraccidental changes. The system password may beenabled or disabled. The flowmeter ships from thefactory with the system password disabled.

RS232 Mode

*TimeGate PolyLink

RS232 Config

9600,N,8,1

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NOTE: In addition to the system password, theflowmeter utilizes a scale factor password(Menu 48) to protect only the scale factorsetting.

If the system password is enabled, the flowmeterrequests the system password when the user attemptsto enter any configuration data. Entering the correctsystem password temporarily unlocks the system,allowing the user to make configuration changes. Thesystem is locked again by accessing Menu 00.

To change or disable the system password:

1. Access Menu 47:

2. Enter the new system password and press ENTER.

NOTE: To disable the system password function(to allow configuration data to be changedwithout entering a password), enter0 (zero) as the system password. Thepassword function can be enabled againby changing the password back to a non-zero number.


3. Enter the old system password and press ENTER.

If the old system password was correctly entered,the following is displayed:

If the old system password was incorrectly entered,the following is displayed:

NOTE: After the system password is accepted orrejected, Menu 48 is displayed, enablingthe scale factor password to be changed.Refer to Menu 48.

4. Access Menu 00 to lock the system with the newpassword.

Password?

New Sys Password?

?

Old Syst. Password?

?

Password

Accepted

Password

*** Rejected ***

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Change Scale Factor Password (Menu 48)

This menu is used to change the scale factor password.The scale factor password is designed to protect thescale factor from unauthorized or accidental changes.The scale factor password may be enabled or disabled.The flowmeter ships from the factory with the scalefactor password disabled.

NOTE: In addition to the scale factor password, theflowmeter utilizes a system password(Menu 47) to protect all configuration dataother than the scale factor.

If the scale factor password is enabled, the flowmeterrequests the scale factor password whenever the userattempts to change the scale factor (Menu 52).

To change or disable the scale factor password:

1. Access Menu 48:

2. Enter the new scale factor password and pressENTER.

NOTE: To disable the system password function(to allow the scale factor to be changedwithout entering a password), enter0 (zero) as the scale factor password. Thepassword function can be enabled againby changing the password back to a non-zero number.


3. Enter the old scale factor password and pressENTER.

If the old scale factor password was correctlyentered, the following is displayed:

If the old scale factor password was incorrectlyentered, the following is displayed:

New Sc Fact Passwrd?

?

Old Scale Password?

?

Scale Password

Accepted

Scale Password

*** Rejected ***

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Unit ID (Identification) Number (Menu 49)

This menu is used to set the ID (identification) numberof the flowmeter. This number is determined by theoperator and is used to identify the specific instrumentor site. Any whole number between 1 and 60,000 maybe entered with the numeric keypad.

3.6.9 CALIBRATION SETUP MENUS

The CALIBRATION sub-menu contains the setupmenus for calibrating the flowmeter, setting the timeand date, and enabling or disabling the sound speedcompensation function.

NOTE: For information on calibrating the currentloop, refer to Chapter 6.

Calibration Group Menu (Menu 50)

The Calibration Group Menu can be accessed byscrolling to CALIBR on the Main Menu or by directlyaccessing Menu 50. This menu is used as a convenientway to access the individual calibration menus(Menus 51 through 54). To access the individualcalibration menus, scroll to one of the followingselections in Menu 50 and press ENTER:

! SET ZERO

! SCALE

! SS COMP

! DATE

NOTE: Menus 51 through 54 can also be directlyaccessed by pressing MENU and the two digitaddress.

Refer to Chapter 5 for detailed information oncalibration.

Unit ID

0

Calibration

!!!!Set Zero !!!!Scale

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Zero Set (Menu 51)

This menu is used to select one of the followingzeroing (calibration) methods:

! NO FLOW (zero set calibration)

! MANUAL (manual zero set calibration)

Refer to Section 5.1 for detailed information on thezero set calibration methods.

Scale Factor (Menu 52)

This menu provides a means for the operator to adjustthe instrument-displayed flow. The flow measured bythe instrument is multiplied by this value. Refer toSection 5.2 for detailed information on the scale factor.

Sound Speed Compensation (Menu 53)

This menu is used to turn on or off the flowmeter'ssound speed compensation. Temperature variations inthe fluid and other factors may cause variations in thefluid’s sound speed. Typically, the flowmeter candetermine the sound speed more accurately whensound speed compensation is enabled.

Date and Time (Menu 54)

This menu is used to set the date and time in theinternal clock of the flowmeter. The time is expressedin military time (24 hour format) and the date is in themonth-day-year format.

To set the date and time:

1. Access Menu 54.

2. Press ENTER.

Prompts are displayed one screen at a timerequesting month, day, and year entries for the dateand hour, minute, and second entries for the time:

3. Enter the requested date and time parameters foreach screen, pressing ENTER after each entry.

Set Zero

!!!!No Flow !!!!Manual

Scale Factor

0.9850

Sound Speed Comp.

*Enabled Disabled

Date and Time

12-01-96 14:07:17

Date and Time?

Month? 12

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NOTE: To keep the current value displayed in anyscreen, scroll to the next screen with theDOWN ARROW key instead of pressingENTER.

Once all time parameters have been entered, thenew programmed date and time is displayed:

3.6.10 CURRENT LOOP SETUP MENUS

The 4-20mA sub-menu contains the setup menus forthe 4 to 20 mA current loop. The span for the currentloop can be set and the output of the current loop canbe calibrated and tested.

Current Loop Group Menu (Menu 56)

The Current Loop Group Menu can be accessed byscrolling to 4-20mA on the Main Menu or by directlyaccessing Menu 56. This menu is used as a convenientway to access the three current loop setup menus(Menus 57, 58, and 59). To access the current loopsetup menus, scroll to one of the following selectionsin Menu 56 and press ENTER:

! SPAN

! CAL.

! TEST

NOTE: Menus 57, 58, and 59 can also be directlyaccessed by pressing MENU and the two digitaddress.

Current Loop Span (Menu 57)

This menu is used to set the span for the current loop.Refer to Chapter 6 for detailed information andprocedures on current loop functions.

Current Loop Calibration (Menu 58)

This menu is used to calibrate the current loop. Referto Chapter 6 for detailed information and procedureson current loop functions.

Current Loop

!!!!Span !!!!Cal. !!!!Test

Span? 4 mA

0.00 Gal/S

4 mA Calibrate

<-- -->

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Current Loop Test (Menu 59)

This menu is used to test the calibration of the currentloop and/or the devices connected to it. Refer toChapter 6 for detailed information and procedures oncurrent loop functions.

3.6.11 ALARMS SETUP MENUS

The ALARMS sub-menu contains the setup menus forprogramming and viewing the flowmeter’s alarmparameters. The DCT-7088 has four alarms which maybe programmed ON or OFF based on flow rate orsignal strength values. If the measured value of theselected condition falls outside the alarm parameters,the alarm is activated, causing the optional printer toprint the flow data and/or the alarm status.

Alarms Group Menu (Menu 70)

The Alarms Group Menu can be accessed by scrollingto ALARMS on the Main Menu or by directly accessingMenu 70. This menu is used as a convenient way toaccess the two alarm setup menus (Menus 71 and 72).To access the alarm setup menus, scroll to one of thefollowing selections in Menu 70 and press ENTER:

! PROG

! VIEW

NOTE: Menus 71 and 72 can also be directlyaccessed by pressing MENU and the two digitaddress.

Program Alarms (Menu 71)

This menu is used to program the four alarms for theDCT-7088. Each alarm is independently programmed.

To program the alarms:

1. Access Menu 71:

2. Select an alarm. (The alarms are displayed as !1through !4.)

The Alarm On Condition screen is displayed:

Current Loop Test

<-- 4 mA -->

Alarms

!!!!Program !!!!View

Prog Alarm #

!!!!1 !!!!2 !!!!3 !!!!4

Alarm 1 On Condition

*Flow <

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3. Select one of the following alarm ON conditions:

! NOT PROGRAMMED (OFF)

! FLOW > (The relay actuates when the flow rateis greater than the ON condition value.)

! FLOW < (The relay actuates when the flow rateis less than the ON condition value.)

! SIGNAL > (The relay actuates when the signalstrength value is greater than the ON conditionvalue.)

! SIGNAL < (The relay actuates when the signalstrength value is less than the ON conditionvalue.)


The Alarm On Condition Value screen isdisplayed:

5. Enter the value for the alarm ON condition andpress ENTER.

NOTE: The flow units used for the alarms are thesame as the flow units selected formeasuring flow in Menu 30.


The Alarm Off Condition screen is displayed:

7. Select an alarm OFF condition.

The selections available for the OFF condition arethe same as those for the ON condition. The OFFcondition value should be entered in conjunctionwith the ON condition value to establish a “deadband”. This prevents the alarm from continuouslycycling on and off when the flow is close to the ONor OFF value. For example, if the ON condition isFLOW > 250 gallons per minute, the OFF conditionmay be set as FLOW < 240 gallons per minute. Atthese settings, the alarm turns on when the flowexceeds 250 gallons per minute and does not turnoff until the flow falls below 240 gallons perminute.

On Cond. Value

16.00 Gal/S

Alarm 1 Off Cond.

*Flow >

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The Alarm Off Condition Value screen isdisplayed:

9. Enter the value for the alarm OFF condition andpress ENTER.

10. Repeat steps 1 through 9 for all alarms that are tobe programmed.

View Alarms (Menu 72)

This menu is used to display the current ON and OFFconditions of the alarms.

To view the current alarm conditions:

1. Access Menu 72:

2. Select an alarm. (The alarms are displayed as !1through !4.)

The ON and OFF conditions for the selected alarmare displayed:

3.6.12 DATA LOG SETUP MENUS

The DATA LOG sub-menu contains the setup menusfor the data logger.

Data Log Setup (Menu 80)

This menu is used to set up the data logger. The datalogger provides the ability of continuously recordingflow data at preset intervals for long time periods.There are approximately 65,000 data points availableto the data logger memory. This allows considerabledata to be collected. For instance, collecting at60-second intervals, the flowmeter could store data forapproximately 44 days. The data logger can be startedand stopped manually or can be programmed to runautomatically for a future start and stop time.

Once a data log file is complete, it is stored in theflowmeter for future retrieval. The file is automaticallyassigned a unique file number, allowing additional datalogs to be recorded and retrieved. (The file number isbased on the record date plus a sequence number.) The

Off Cond. Value

24.00 Gal/S

Show Alarm #

!!!!1 !!!!2 !!!!3 !!!!4

On = Flow <16

Off = Flow >24

Log Menu

!!!!Start !!!!Auto

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file numbers can be viewed to determine which datalog files are present. These files can be deleted fromthe flowmeter or can be transferred in ASCII format toan IBM-compatible PC for record keeping or analysis.The files are transferred using the PolyLink flowmeterdata link utility (Appendix A).

The following selections are available in Menu 80:

! START (or STOP)

! AUTO

! INTERVAL

! VIEW

The START (or STOP) selection provides control formanually starting or stopping the data logger. (Theappropriate selection is displayed depending on thewhether the data logger is currently recording.)

To manually start the data logger, select START.

To manually stop the data logger:

1. Access Menu 80.

2. Select STOP.


3. Press the 5 key.

The AUTO selection allows the data logger to beprogrammed for a future start and stop time.

To use the AUTO function:

1. Access Menu 80.

2. Select AUTO.

The current programmed start and stop times aredisplayed:

3. Press ENTER.

Stop Log

Are you sure?(5=Yes)

Start: 5 7:08:30

Stop: 6 23:15:00

Start Log?

Day? 5

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Prompts are displayed one screen at a timerequesting day hour, minute, and secondinformation for the start and stop times:fr

4. Enter the requested time parameters for eachscreen, pressing ENTER after each entry.

NOTE: To keep the current value displayed in anyscreen, scroll to the next screen with theDOWN ARROW key instead of pressingENTER.

Once all time parameters have been entered, thenew programmed start and stop times aredisplayed:

The data logger will start and stop automatically at thepreset times. In addition, while the data logger isrunning, the preset stop time can be canceled bystopping the data logger manually (selecting STOP).

IMPORTANT: Ensure that the flow measurementunits, time, and date are correctly seton the flowmeter prior to beginning thelog. Do not alter any of theseparameters during the log or beforetransfer of the data.

Any power interruption causes a zeroto be written in the data log stream.This feature is useful to determine if aninterruption in the time sequence hasoccurred or if the instrument has beenmoved or tampered with during datalogging.

The INTERVAL selection sets the interval for the datalog. Refer to Menu 81.

The VIEW selection shows which data log files arestored in memory, and indicates the size of each fileand the amount of data log memory still available. Thefiles may be scrolled through one at a time. In addition,a data log file can be deleted.

Start: 8 8:09:00

Stop: 9 11:45:30

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To delete a data log file:

1. Access Menu 80.

2. Select VIEW.

3. Scroll through the data log files with the UP orDOWN ARROW keys to display the file that is tobe deleted.

4. Press ENTER.


5. Press the 5 key.


6. Press the decimal point (.) key.


Data Log Interval (Menu 81)

Menu 81 is used to set the interval for the data log.This menu can be accessed directly (by pressingMENU and 81) or by selecting INTERVAL in Menu 80.The data log interval must be entered in whole secondswith a minimum interval of 1 second.

3.6.13 DIAGNOSTICS DISPLAY MENUS

The DIAGNOSTICS sub-menu contains various view-only menus. These menus display important diagnosticparameters that are currently used or calculated by theflowmeter. These parameters are helpful whenconfiguring or troubleshooting the instrument.

Signal Strength/Margin (Menu 90)

This menu displays the signal strength and the margin.The signal strength value displayed in this menu is theaverage of the signal strengths for the upstream anddownstream transducers. Margin is an indicator ofsignal quality. Margin is generally greater than 5% andsignal strength is generally greater than 3% under goodmeasurement conditions.

Erase Log File?

Are you sure?(5=Yes)

Erase Log File?

Really sure?(.=Yes)

Data log

Erased

Log Interval

60 secs

SigStr = 0%

Margin = 0%

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Delta Time/Fluid Sound Speed (Menu 91)

This menu displays the value for DeltaT and the fluidsound speed as measured by the flowmeter. DeltaT isthe difference between the upstream and downstreamtravel time, expressed in nanoseconds.

Reynolds #/Profile Factor (Menu 92)

This view-only menu displays the Reynolds numberand flow profile factor currently being used by theflowmeter. The flow profile factor is calculated by theflowmeter and is used to determine the effect of theflow profile on mean measured fluid velocity.

Current Loop Output (Menu 93)

This view-only menu displays the value of the currentin milliamperes that the flowmeter is presentlyproviding to the current loop output.

Software/Firmware Rev. Level (Menu 94)

This view-only menu displays the version of software(SOFT VERS.) and firmware (FPGA VERS.) that areinstalled in the flowmeter.

NOTE: Refer to Chapter 1 for information onsoftware upgrades.

3.6.14 PRINT SETUP AND PRINT COMMANDS

The optional printer can be configured in the PRINTsub-menu in Menu 96. In addition, certain data may beprinted by pressing MENU plus 97, 98, or 99 from anyscreen. (There are no specific screens displayed on theflowmeter for these three print commands.)

Print Log Setup (Menu 96)

This menu is used to set up the optional printer. Theprinter can be configured to print out flow data at apreset interval and/or whenever an alarm is activated.The flow data that is printed includes the data from allenabled totalizers.

DeltaT = 0.00 ns

SSpeed = 4863.33 FPS

Reynolds= 0

Factor =0.750000

Current Loop

Output = 4.57 mA

Soft Vers. = 1.00

FPGA Vers. = A0

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The flow data is printed in minimum, maximum, andaverage flow rates. The minimum and maximum ratesare automatically reset at the end of each print period.The average flow rate is the average over the printinterval.

To configure the printer:

1. Access Menu 96:

2. Select one of the following options:

! NONE (disables the printer)

! FLOW (configures the printer to print out flowdata at the preset log interval)

! ALARM (configures the printer to print out flowdata when an alarm is activated)

! BOTH (configures the printer to print out flowdata at the preset log interval and when analarm is activated)

3. If FLOW or BOTH was selected, press the DOWNARROW key to set the print interval.


4. Enter the print interval in whole seconds and pressENTER.

NOTE 1: If the log interval is too short to allowthe selected data to be printed, erraticoperation may result.

NOTE 2: If the print interval is interrupted by apower loss, the printer resumes printingat the prescribed interval after power isrestored.

Prints Settings (Menu 97)

All parameters associated with the pipe, liner, fluid,transducer, and flow menus (Menus 10 through 35) canbe printed out by pressing MENU and 97.

Print Select

*None Flow Alarm

Print Interval

30 sec.

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Prints Diagnostics (Menu 98)

All parameters associated with the diagnostics menus(Menus 90 through 94) can be printed out by pressingMENU and 98.

Prints Current Screen (Menu 99)

Any screen which is currently displayed on theflowmeter can be printed out by pressing MENUand 99.

Appendix

-59

3.7 Master Erase Function and Emergency Override PasswordsThis section covers the emergency override passwords and the procedure for performing amaster erase of all configuration data on the flowmeter. Since these two procedures allowcritical data to be accessed and changed, this page may be removed from the instructionmanual to prevent unauthorized use of these features.

3.7.1 EMERGENCY OVERRIDE PASSWORDS

In the event that a user-entered password is forgotten, the following emergency overridepasswords may be used:

! 42 (system password)

! 43 (scale factor password)

The emergency override passwords cannot be changed or disabled.

3.7.2 MASTER ERASE FUNCTION

All user-entered data in the flowmeter can be erased with the master erase function.

To perform a master erase:

1. Turn the flowmeter off and back on again.

2. When the message INITIALIZING...is displayed, press ERASE immediately (within 3to 5 seconds).

The Master Erase screen is displayed:

3. Press the 5 key to continue with the master eraseprocedure (must be pressed within 3 to 5 seconds or the procedure is aborted).


4. Press the # (period) key to continue with the mastererase procedure (must be pressed within 3 to 5 seconds or the procedure is aborted).

If the master erase function is completed, the following isdisplayed and the flowmeter initializes:

If the master erase function is aborted, the following isdisplayed and the flowmeter initializes:

Master Erase.

Are you sure?(5=yes)

Master Erase.Are youreally sure? (.=yes)

Master Erase

Completed

Master Erase

Aborted

Appendix C

A-60

INSTALLING THE TRANSDUCERSThis chapter covers the procedures for installing the transducers. It covers guidelines forselecting a measurement site (Section 4.1) and describes the procedures for spacing andmounting the transducers (Section 4.2). Three different mounting methods are described:the V method, Z method, and W method (Section 4.4).

4.1 Measurement Site SelectionPrior to installing the transducers, a proper site must be selected to ensure accuratemeasurement. Examples of site recommendations are illustrated in Figure 4-1.

Use the following guidelines when selecting the transducer site:

! Choose a section of pipe which is always full of liquid, such as a vertical pipe withup flow or a full horizontal pipe.

! The site should have a straight run equivalent to at least 10 pipe diameters upstreamand 5 pipe diameters downstream from any elbows, tees, throttling valves, orifices,reduced sections, or other flow disturbances.

! After a pump, control valve, or double piping bend, up to 30 diameters of straight runmay be required upstream from the flowmeter for greater accuracy. A distance of5 diameters downstream is usually sufficient under all circumstances.

! On horizontal pipes, always mount the transducers on the sides of the pipe, in the3 o'clock or 9 o'clock positions. (This avoids sediment along the bottom of the pipe andgas bubbles or air pockets along the top of the pipe, which can cause signal loss.)

! Ensure that the pipe skin temperature is within the transducer temperature rating. Thetransducers are rated for -40 to +300°F (-40 to +150°C), at 77°F (25°C) ambienttemperature. Higher ranges are available with optional high temperature transducerblocks (Section 4.5).

! If possible, select a section of pipe where the inside is free from excessive corrosion orscaling. Such conditions can make accurate measurement difficult or impossible.

If any or all of the above guidelines cannot be followed completely, it is still possible toobtain meaningful flow measurements, often with little or no loss of accuracy.

Appendix C

A-61

Figure 4-1 Site Recommendations

Appendix C

A-62

4.2 Spacing and Mounting the TransducersIn order to maximize signal strength and accuracy, it is essential to properly space andmount the transducers as follows:

1. Select a proper transducer site, following the guidelines in Section 4.1.

2. Configure the flowmeter (Chapter 3). As a minimum, enter the critical parameterslisted in the quick setup procedure (Section 3.5).

NOTE: For more information on which transducer mounting method to select whenconfiguring the flowmeter, refer to Section 4.4.

Once the flowmeter has been configured, the flowmeter calculates the requiredtransducer spacing and stores it in Menu 25.

3. Access Menu 25 and note the value for the transducer spacing.

NOTE: If the pipe outer diameter (OD) is between 1 and approximately 16 inches (25and 406 millimeters), the slide track assembly may be used to simplify themounting procedure. Refer to Section 4.2.1.

4. Refer to the installation instructions for the selected mounting method, as follows:

! V method: Section 4.4.1

! W method : Section 4.4.2

! Z method: Section 4.4.3

5. Clean the area of the pipe where the transducers are to be installed. Remove any rust,scale, or loose paint. (Well-bonded paint need not be removed.)

IMPORTANT: On horizontal pipes, the transducers should be mounted in the 3 o’clockand 9 o’clock positions. This avoids sediment along the bottom and gasbubbles or air pockets along the top of the pipe, which can cause signalloss.

6. Apply a wide bead of PolyGlide™ sonic coupling compound lengthwise down thecenter of the face of each transducer.

IMPORTANT: The coupling compound should squeeze out from around the edges ofthe transducer when it is placed against the pipe. There should be no airgaps between the transducer and the pipe. Refer to Section 4.6 for moreinformation on applying and replacing PolyGlide™ and for informationon the use of other sonic coupling compounds for high temperature,underground, or submerged installations.

7. Attach the transducers to the pipe using the stainless steel pipe clamps or the nylon(cloth) tie down straps (Section 4.7). Tighten both straps securely, ensuring that thetransducers are aligned normal to the pipe (Section 4.3).

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A-63

The flowmeter has two transducer cables: the upstream transducer cable, which hasred-banded ends and the downstream transducer cable which has blue-banded ends.There are two BNC connectors for the transducer cables on the right side of theflowmeter. The upstream connector is in the uppermost position and the downstreamconnector is in the lower position when the case is opened (Figure 4-2). Reversing thecables on either the instrument or transducer ends will result in flow measurement inthe reverse direction of actual flow.

8. Connect the transducer cables.

9. Calibrate the flowmeter if maximum possible accuracy is important (Chapter 5).

10. Access Menu 00.

The flowmeter is now capable of accurately measuring velocity and flow.

4.2.1 USING THE SLIDE TRACK

The transducer slide track (Figure 4-2) comes standard with the DCT-7088. It may be usedfor mounting transducers with the V or W mounting method, but cannot be used for the Zmethod. It is limited to pipe sizes with outer diameters of 1 to approximately 16 inches (25to 406 millimeters). Although not required, the slide track is convenient for mounting thetransducers since it has spacing measurements printed on its two rails. The top rail ismarked off in inches (in 0.1 and 0.05 increments) and the bottom rail is marked off inmillimeters.

Figure 4-2 Using the Slide Track

Appendix C

A-64

To use the slide track:

1. Complete steps 1 through 3 in Section 4.2 to determine the transducer spacing.

2. Ensure that the inside face of the left transducer is aligned to the 0 (zero) spacing mark.If not, loosen the thumb screws and adjust its position accordingly.

3. Loosen the thumb screws on the right transducer.

4. Move the right transducer until the inside face of the transducer lines up with thespacing measurement provided in Menu 25.

5. Tighten the thumbscrews to lock the transducers in place.

6. Follow steps 4 through 10 in Section 4.2 to complete the installation.

NOTE: The slide track is mounted to the pipe as a single assembly.

4.3 Aligning the TransducersThe most critical requirement of transducer alignment is that the transducer face be alignednormal to the pipe. This is particularly critical on small pipes due to pipe curvature. Figure4-3 shows a properly installed transducer and a one that has been installed improperly.Notice that the properly installed transducer contacts the pipe at the pipe’s centerline andthat the gaps on either side of the centerline are equal.

Figure 4-3 Aligning the Transducers

The easiest method of aligning transducers on small pipes is as follows:

1. Secure both transducers to the pipe with the metal bands, tightening the bands until thetransducers are just snug.

2. Adjust the transducers until the gaps on both sides of the transducers are equal.

3. While holding the transducers in place, tighten the bands sufficiently to prevent thetransducers from slipping and to allow proper operation of the flowmeter.

Appendix C

A-65

4.4 Transducer Mounting MethodsThere are three methods of mounting the transducers, which are available in Menu 24. Thebest method is determined by the specific application.

The mounting methods are as follows:

! V method (Section 4.4.1)

! W method (Section 4.4.2)

! Z method (Section 4.4.3

4.4.1 V METHOD

The V method (Figure 4-4) is considered the standard method. It usually yields a moreaccurate reading than the Z method since it utilizes a longer measurement path. To mountthe transducers with the V method, follow the procedures for spacing and mounting thetransducers in Section 4.2. Ensure that the V method is selected during the configurationstep.

Figure 4-4 Mounting the Transducers with the V Method

Appendix C

A-66

4.4.2 W METHOD

In many instances, flowmeter performance on small metallic pipes with outer diameters of2 inches (51 millimeters) or less can be improved by using the W mounting method(Figure 4-5). With the W method, the sound wave traverses the fluid four times andbounces three times off the pipe walls. Like the V method, both transducers are mountedon the same side of the pipe. To mount the transducers with the W method, follow theprocedures for spacing and mounting the transducers in Section 4.2. Ensure that theW method is selected during the configuration step.

Figure 4-5 Mounting the Transducers with the W Method

Appendix C

A-67

4.4.3 Z METHOD

The signal transmitted in a Z method installation has less attenuation than a signaltransmitted in a V method installation. This is because the Z method utilizes a directlytransmitted (rather than reflected) signal which transverses the liquid only once. TheZ method (Figure 4-6) is used primarily in applications where the V method cannot workdue to signal attenuation from excessive air or solids in the liquid, thick scale, poorlybonded linings, or very large pipes. In addition, the Z method generally works better onlarger diameter pipes, where less pipe length is required for mounting.

Figure 4-6 Mounting the Transducers with the Z Method

Appendix C

A-68

To mount the transducers using the Z-method:

1. Complete steps 1 through 4 in Section 4.2.

2. Establish a reference at both the 3 o’clock and 9 o’clock positions of the pipe (Figure 4-7).

Figure 4-7 Establishing a 3 O’clock and 9 O’clock Reference (Z Method)

3. Place one of the transducers at the 3 o’clock position (Figure 4-8).

4. Trace the shape of the 3 o’clock transducer along its inside edge (opposite the cableconnection) and draw a horizontal line at its center (Figure 4-8). Remove thetransducer.

NOTE: If the pipe is painted and can be marked, use a pipe marker or felt-tip marker.If it is not painted, scratch the outline on the pipe with a screwdriver, knife, orpaint scraper.

Figure 4-8 Tracing the 3 O’clock Transducer (Z Method)

5. Obtain a continuous sheet of paper longer than the circumference of the pipe.

NOTE: Calculator paper tape or thermal printer paper works well for this.

Appendix C

A-69

6. Fold one end of the paper across its width to produce a clean, straight edge (Figure4-9).

7. Line the fold of the paper up with the horizontal center line of the 3 o’clock transducer(Figure 4-9).

Figure 4-9 Wrapping the Gauging Paper Around the Pipe (Z Method)

8. Wrap the paper firmly around the pipe and mark the intersection point where the foldcomes in contact with the rest of the paper (Figure 4-10).

Figure 4-10 Marking the Intersection Point on the Paper (Z Method)

9. Take the paper off of the pipe. Placing the fold and the intersection mark togetheragain, fold the paper evenly in half (Figure 4-11).

Figure 4-11 Folding the Gauging Paper in Half (Z Method)

Appendix C

A-70

10. Mark along the new fold (Figure 4-12).

Figure 4-12 Marking Along the Fold (Z Method)

11. Draw a horizontal line along the pipe from the center line of the 3 o'clock transducerposition (Figure 4-13). Use a level to ensure that the line is level with the top of thepipe. This line should be at least 3 inches (76 millimeters) longer than the transducerspacing calculated in Menu 25. For example, if the spacing is calculated to be 14 inches(356 millimeters), draw a 17 inch (432 millimeter) line.

Figure 4-13 Drawing a Horizontal Line at the 3 O’clock Position (Z Method)

12. Measure the spacing (obtained from Menu 25) from the inside edge of the 3 o'clocktransducer, and mark this on the pipe (Figure 4-14).

Figure 4-14 Marking the Transducer Spacing (Z Method)

Appendix C

A-71

13. Wrap the paper firmly back on the pipe. Have the point where the ends of the papercome together line up with the horizontal line on the 3 o’clock side of the pipe. Ensurethat the inside corner of the straight edge is aligned with the mark made for thetransducer spacing. Tape the paper down or have someone hold it in place (Figure4-15).

Figure 4-15 Replacing and Aligning the Gauging Paper (Z Method)

14. Go to the other side of the pipe (9 o’clock position) and mark the pipe at the pointwhere the marked fold and the inside edge of the paper length intersect (Figure 4-16).

Figure 4-16 Marking the Intersection Point on the 9 O’clock Side of the Pipe (Z Method)

15. Take the paper off of the pipe and trace the shape of the 9 o’clock transducer(Figure 4-17), as was done for the 3 o’clock transducer. Ensure that the inside edge ofthe transducer (opposite the cable connection) is even with the point just marked on the9 o’clock side of the pipe.

Figure 4-17 Tracing the 9 O’clock Transducer (Z Method)

Appendix C

A-72

16. Mount the transducers with pipe straps by following steps 5 through 10 in Section 4.2(Figure 4-18).

Figure 4-18 Mounting the Transducers with Straps (Z Method)

Figure 4-19 illustrates the final Z method installation.

Figure 4-19 Final Z Mounting Method Installation

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A-73

4.5 High Temperature Transducer BlocksOptional high temperature blocks are available for applications with pipe temperaturesranging from 300 to 470$F (150 to 243$C). The blocks are installed between thetransducer face and the pipe.

NOTE: Do not use PolyGlide™ sonic coupling compound in applications wheretemperatures exceed 250°F (121°C).

To use the high temperature blocks:

1. Configure the instrument as usual and select HI TEMP BLOCKS as the transducer typein Menu 23.

2. Apply a high temperature couplant (Dow Corning 111® or similar) to the face of thetransducers. (Silicon RTV may be substituted if a more permanent bond is desired.)

3. Press the face of the transducers to the blocks.

4. Apply high temperature couplant to the other side of the blocks.

The transducers are now ready to mount (Section 4.2).

4.6 Sonic Coupling CompoundAny voids or air gaps that exist in the sonic coupling compound between the transducersand the pipe can attenuate the signal. PolyGlide™ sonic coupling compound should beprotected from washout and replaced as required. Annual replacement is recommended formost applications to maintain optimal performance.

To replace the PolyGlide™ compound:

1. Remove the transducers from the pipe.

2. Clean the old compound from the transducers and the pipe.

3. Apply a wide bead of compound lengthwise down the center of the face of eachtransducer.

4. Remount the transducers, verifying that the compound is squeezing out fromunderneath all sides of the transducers and forming a bead along the edges.

Appendix C

A-74

PolyGlide™ sonic coupling compound is in grease form and is made from a mineral oilbase. It is rated for temperatures up to 250°F (121.1 °C). Other coupling compounds arerecommended for the following applications:

! Silicon RTV (GE RTV-108 ® or similar) for underground or submerged transducer sites

or sites where a more permanent bond is required. (The RTV should be completelycured prior to burial or submergence.)

! A high temperature silicone couplant (Dow Corning 111® or similar) for applicationsrequiring the use of high temperature blocks (for pipe skin temperatures up to 470°F[243°C]). High temperature couplant must be placed between the blocks and the pipeas well as between the blocks and the transducers. Silicon RTV may be substitutedbetween the blocks and the transducers if a more permanent bond is desired.

IMPORTANT: Do not bond the transducers with epoxy.

4.7 Nylon (Cloth) Tie-Down StrapsTwo nylon (cloth) tie-down straps are supplied with the flowmeter. The nylon straps aredesigned for quickly installing the transducers on pipes with outer diameters larger than 18inches (457 millimeters). Each strap has a short section and a long section that connecttogether by hooks. The short section is attached to a ratcheting mechanism. The ratchetingmechanism tightens the strap sections to the pipe when the ratchet handle is opened andclosed.

To install transducers with the nylon pipe straps, refer to Figure 4-20 and complete thefollowing steps:

1. With the ratchet handle “A” in the closed position, slip the end of the long strap sectionthrough the slot in the spindle “B”.

2. Connect the hooks together.

3. Place the strap over the transducer and around the pipe.

4. Pull on the end of the long strap section to take up the excess slack between the hooks.

IMPORTANT: To avoid difficulty in releasing the transducers, the excess stack mustbe taken up before tightening the strap with the ratchet handle.

5. Tighten the strap with the ratchet handle by opening and closing the handle repeatedlyuntil the transducer is held firmly in place against the pipe.

6. Lock the ratchet by leaving the ratchet handle in the fully closed position.

Appendix C

A-75

To release the nylon straps:

1. Pull back on the release pawl “C” located on the ratchet handle. (This allows the handleto be opened without tightening the strap.)

2. While holding the release pawl back, open the ratchet handle to the fully open position.

3. Pull the ratcheting mechanism away from the pipe.

Figure 4-20 Nylon Tie Down Straps

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CALIBRATIONAn important step in assuring accurate flow measurement is the proper calibration of theinstrument and the installation. This chapter provides an overview of the calibrationmethods applicable to the DCT series of flowmeters. It covers the reasons why thesecalibration methods are necessary, and the order in which they should be performed. Thecalibration methods are:

! Zero set calibration

! Scale factor calibration

These calibration methods must be performed for the particular pipe that is to be metered.Table 5-1 provides guidelines for selecting a calibration method:

Table 5-1Selecting the Calibration Method

Calibration Method Function Application

Zero set calibration

!Zero flow set

!Manual zero set

Zeros the instrument for anactual no flow condition

Applies a manually entered offsetto all flow readings

Installations where flow can bestopped

Where an offset is required

Scale Factor Compensates for variations inthe inside diameter of the pipe

As required on installationswhere the zero point has alreadybeen set and verified under zeroflow conditions

NOTE: The 4 to 20 milliampere (4 to 20 mA) current loop can also be calibrated forapplications using a current loop. Refer to Chapter 6 for more information.

5.1 Zero Set CalibrationOnce the instrument is operating on the actual pipe to be metered, a small adjustment to thezero point, or zero set calibration, may be required to maximize accuracy at low flow rates.Zero set calibration allows the flowmeter to read very close to zero under zero flowconditions.

There are two zero set calibration methods available in Menu 51: the zero flow set method(Section 5.1.2) and the manual zero set method (Section 5.1.3). The zero point used ineither of these methods is displayed by selecting MANUAL in Menu 51.

NOTE: After the instrument has been properly zeroed, it should display a stable readingwell below 0.05 feet per second (0.015 meters per second) under zero flowconditions with the low flow cutoff disabled.

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5.1.1 PRELIMINARY STEPS FOR ZERO SET CALIBRATIONS

Before performing a zero set calibration, follow these preliminary steps:

1. Ensure that the transducers are connected to the pipe during the zero set calibrationprocedure.

2. Ensure that the instrument is reading flow. (Completing the Quick Setup procedure[Section 3.5] should accomplish this. The instrument must have successfully completedits internal configuration process as indicated on the display by the presence of a flowreading.)

3. Disable the low flow cutoff to allow the zeroing operation to be verified. (To disablethe low flow cutoff, set the low flow cutoff value in Menu 34 to zero.)

5.1.2 ZERO FLOW SET METHOD

The best method of zeroing the instrument is to stop the flow and perform a zero flow set.on the pipe. The purpose of the zero flow set is to zero the instrument for the individualinstallation. This method is used only when the flow in the pipe can be stopped.

To zero the instrument with the zero flow set method:

1. Follow the preliminary steps outlined in Section 5.1.1.

2. Ensure that there is no flow in the pipe.

3. Access Menu 51.


Set Zero

!!!!No Flow !!!!Manual

4. Select NO FLOW.

The following is momentarily displayed, indicating that the flowmeter is nowcalibrated with the zero flow set method:

Zero Cal Ok

Flow = 0.00 GPM

5.1.3 MANUAL ZERO SET

The zero point can be manually entered with the manual zero set method. This methodshould be used infrequently. Manual zero set applies a constant offset entered by the userto all readings.

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Table 5-2 illustrates an example of a manual zero offset of 10 gallons per minute:

Table 5-2Example of Manual Zero Set

Uncalibrated Flow Reading(before manual zero offset)

Manual Zero Offset Calibrated Flow Reading(after manual zero offset)

250 GPM 10 GPM 240 GPM

To zero the instrument with the manual zero set method:

1. Follow the preliminary steps outlined in Section 5.1.1.

2. Minimize the flow occurring in the pipe and determine the value of the required offset.

3. Access Menu 51.

4. Select MANUAL.


Zero Point

0.00 GPM

5. Enter the value of the required offset (for example, 10) and press ENTER.

NOTE: A negative offset can be applied by first pressing the ± key.

The flowmeter is now calibrated with the manual zero set method and the zero pointoffset is displayed:

Zero Point

10.00 GPM

5.2 Scale Factor CalibrationAfter the instrument’s zero point has been set and verified, a scale factor can be set toadjust the measured flow. The flow measured by the instrument is multiplied by this scalefactor. (For example, if the displayed flow is twice the actual flow, a scale factor of 0.5divides the displayed flow by 2. If the displayed flow is one-half of the actual flow, a scalefactor of 2 doubles the displayed flow.) The primary reason for setting the scale factor is tocompensate the instrument for manufacturing variations in the transducers. The scale factorprinted on the transducer set should be entered in Menu 52.

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5.2.1 SCALE FACTOR PRECAUTIONS

Observe the following precautions when setting the scale factor:

! Always determine the scale factor at the highest possible flow rate achievable in orderto maximize the accuracy of the scale factor.

! Use the factory preset scale factor as marked on the transducers in the followingsituations:

- The flow cannot be stopped to verify or set the zero point

- A reasonably high flow rate cannot be achieved

- An accurate secondary flow standard is not available

5.2.2 CHANGING THE SCALE FACTOR

The scale factor is preset at the factory. The factory-set scale factor is displayed inMenu 52 and is imprinted on the transducers. If an additional scale factor is required by theuser, the additional scale factor should be multiplied by the factory scale factor and theresult should be entered.

To enter a new scale factor:

1. Access Menu 52:

Scale Factor

.985

2. Enter the new scale factor and press ENTER.

The following is displayed (if the scale factor password is enabled [Menu 48]):

Scale Fact Password?

?

3. Enter the valid password and press ENTER.

The new scale factor is displayed in Menu 52 and is entered into the flowmeter.

IMPORTANT: The flowmeter ships from the factory with the scale factor passworddisabled. To maximize security, a new scale factor password should beentered immediately. Refer to Menu 48 in Section 3.6.8.

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CONFIGURING THE CURRENT LOOPThe flowmeter has a 4 to 20 milliampere (4 to 20 mA) current loop output. The currentloop can be calibrated and tested and the span for the current loop can be set.

NOTE: The current loop can be selected to be self-powered or loop powered(Section 2.3).

To calibrate, test, and set the span for the current loop:

1. Connect a milliammeter to the 4 to 20 mA terminals on the breakout box of theDCT-7088 (Figure 2-1).

2. Access Menu 58:

4 mA Calibrate

<-- -->

3. Press the RIGHT or LEFT ARROW keys to adjust the 4 mA set point until the valuereads exactly 4.00 mA on the milliammeter and press ENTER.


20 mA Calibrate

<-- -->

4. Repeat step 3 for entering the 20 mA set point.

5. To verify the accuracy of the current loop, access Menu 59:

Current Loop Test

<-- 4 mA -->

The value of the output (in milliamperes) appears on the second line of the display.

6. Change the current loop output in 1 mA increments using the RIGHT or LEFT ARROWkeys.

The values displayed on the display should be the same as the values on themilliammeter. If the values do not match, the current loop output should be recalibratedand retested (steps 2 through 6).

7. To set the current loop span (the span of flow vs. current), access Menu 57:

Span? 4 mA

0.00 Gal/S

Appendix C

A-81

8. Enter a flow rate which equals the 4 mA (minimum anticipated) reading and pressENTER.



Span? 20 mA

0.00 Gal/S

10. Enter a flow rate which equals the 20 mA (full scale) reading and press ENTER.

11. Access Menu 00 to complete the current loop calibration process.

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SERVICE SUPPORT AND WARRANTYThis chapter covers the procedures for obtaining service support and provides warrantyinformation for the DCT-7088. Due to the complex nature of microprocessor basedequipment, it is not feasible to attempt internal repairs or service in the field other thanreplacement of fuses (Section 1.5.1) and software upgrades (Section 1.7).

7.1 Resolving the ProblemIf the unit does not perform satisfactorily, complete the following steps in order until theproblem is resolved:

1. Verify that the flowmeter was properly configured and calibrated and that thetransducer site was suitable. Refer to the following chapters for more information:

! Chapter 3 - configuration

! Chapter 4 - transducer installation

! Chapter 5 - calibration

2. Contact the installation contractor or representative through which the instrument waspurchased (Section 7.2).

3. Contact Polysonics to attempt to resolve the problem over the phone (Section 7.3).

4. Return the unit to Polysonics for repair (Section 7.4) or arrange for Polysonics fieldservice (Section 7.5).

7.2 Local Representative SupportThe local Polysonics representative is the first contact for support and is well equipped toanswer questions and provide application assistance. Your representative has access toproduct information and current software revisions.

7.3 Contacting Polysonics by PhoneBefore contacting Polysonics by phone, make a note of the instrument's model and serialnumber. Have the operating parameters of the application available (type of fluid, pipesize, pipe material, fluid velocity, temperature, etc.). If the problem cannot be remediedover the phone, the service engineer may request that the instrument be returned to thefactory for repair. The address and telephone numbers of the service centers are listed inSection 7.4.

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7.4 Factory ServiceIf Polysonics determines that the problem cannot be resolved over the phone, the entireunit should be returned to Polysonics' service department or arrangements made forPolysonics field service (Section 7.5).

The Polysonics Service Department should be contacted before returning an instrument forrepair. The service department issues an RMA number which must be placed on theoutside of the shipping box in order for the receiving dock to accept the shipment.

A letter should be included with the instrument fully explaining the symptoms of thefailure as well as details regarding the application in which the unit was being operated(type of fluid, pipe size, pipe material, fluid velocity, temperature, etc.). This letter isrequired for all units including those returned for warranty repairs. Service cannot beadequately performed until this written information is received.

To ship an instrument to Polysonics:

1. Ensure that the instrument is well packed (in its original shipping box, if available).

2. Include the letter of explanation.

3. Write the RMA number on the outside of the shipping box.

4. Send the unit freight-paid to one of the following service centers:

North American Service Center (USA)Peek Measurement, Inc.10335 Landsbury, Suite 300Houston, Texas 77099-3407 USATelephone: (713) 879-3700Facsimile: (713) 498-7721

European Service Centre (UK)Peek Measurement, Ltd.King's WorthyWinchester, Hampshire SO23 7QA UKTelephone: (01962) 883200Facsimile: (01962) 885530

Peek Measurement pays the return freight if the unit is under warranty. All repairs aremade in accordance with the Peek Measurement limited warranty (Section 7.6).

7.5 Field ServiceField service is available and is recommended in some instances. All field service calls are tobe scheduled in advance and paid for by the customer. Contact Peek Measurement for rates.

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7.6 WARRANTY

Peek Measurement products are warranted to be free from defects in material andworkmanship at the time of shipment and for one year thereafter. Any claimed defects inPeek Measurement products must be reported within the warranty period. PeekMeasurement shall have the right to inspect such products at buyer's plant or to requirebuyer to return such products to Peek Measurement plant.

In the event Peek Measurement request return of its products, Buyer shall ship withtransportation charges paid by the Buyer to Peek Measurement plant. Shipment ofrepaired or replacement goods from Peek Measurement plant shall be F.O.B. PeekMeasurement plant. A shop charge may apply for alignment and calibration services.Peek Measurement shall be liable only to replace or repair, at its option, free of charge,products which are found by Peek Measurement to be defective in material orworkmanship, and which are reported to Peek Measurement within the warranty periodas provided above. This right to replacement shall be Buyer's exclusive remedy againstPeek Measurement.

Peek Measurement shall not be liable for labor charges or other losses or damages ofany kind or description, including but not limited to, incidental, special or consequentialdamages caused by defective products. This warranty shall be void if recommendationsprovided by Peek Measurement or its Sales Representatives are not followed concerningmethods of operation, usage and storage or exposure to corrosive conditions.

Materials and/or products furnished to Peek Measurement by other suppliers shall carryno warranty except such suppliers' warranties as to materials and workmanship. PeekMeasurement disclaims all warranties, expressed or implied, with respect to suchproducts.

EXCEPT AS OTHERWISE AGREED TO IN WRITING BY PEEK MEASUREMENT, THEWARRANTIES GIVEN ABOVE ARE IN LIEU OF ALL OTHER WARRANTIES,EXPRESSED OR IMPLIED, AND PEEK MEASUREMENT HEREBY DISCLAIMS ALLOTHER WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESSFOR PURPOSE.

10335 Landsbury, Suite 300 ! Houston, Texas 77099-3407 USATelephone: (713) 879-3700 ! Facsimile: (713) 498-7721

King's Worthy ! Winchester, Hampshire SO23 7QA UKTelephone: (01962) 883200 ! Facsimile: (01962) 885530

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POLYLINK FLOWMETER DATA LINKUTILITY

PolyLink is a universal communications utility for Polysonics flowmeters, replacing PXU.It provides the following remote functions (depending on the flowmeter model):

! Monitoring and configuring (Section A.3)! Data log file downloads and deletions (Section A.5)! Software uploads (Section A.6)! Graphical signal analysis (Section A.7)

Table A-1 lists the available PolyLink features by flowmeter model as of the date of this printing:

Table A-1PolyLink Feature Availability

FlowmeterModel

Remote Configuringand Monitoring

Data log Downloadsand Deletions

SoftwareUploads

Graphical SignalAnalysis

DDF3088 No Yes No1 No2

DDF40883 Yes4 Yes Yes Yes

DDF4488 Yes4 Yes Yes Yes

DDF5088 Yes N/A No5 No6

DCT-6088 Yes4 Yes Yes7 No8

DCT-7088 Yes4 Yes Yes7 No8

ISTT Yes4 Yes N/A No

ISTT-P Yes4 Yes N/A No

1 The DDF3088 may be upgraded with the HCOM utility, which is provided on the PlantCom Utility Software diskette.

2 The graphical signal analysis feature is available through the DDF3088’s integrated keypad and display.3 The DDF4088 must have version 1.1 or higher installed to communicate with PolyLink.4 VT100 mode.5 The DDF5088 may be upgraded with the Loader utility, which is provided on the PlantCom Utility

Software diskette.6 The graphical signal analysis feature for the DDF5088 is available with the optional WinFLOW™ utility.7 The DCT series of flowmeters are upgraded with a utility provided with the upgraded software.8 The graphical signal analysis feature for the DCT series of flowmeters is available with the

TimeGATE ™ utility.

PolyLink is available on the PlantCom Utility Software diskette from Polysonics or bymodem download from the Polysonics Bulletin Board System (BBS) at (713) 933-1901.(For procedures on using the BBS, refer to the file BBS.TXT, available on the PlantComUtility Software diskette.) PolyLink is also available in the zipped software upload files forthe flowmeters listed in Table A-1.

NOTE: For information on using PolyLink with a DDF5088, refer to the DDF5088instruction manual.

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A.1 Hardware RequirementsThe flowmeter can be configured with PolyLink using an IBM-compatible PC or aDDF3088 flowmeter. The PC must be a minimum of an XT with 640K RAM. If aDDF3088 is used, the flow program operating in the DDF3088 must be version 2.2 orhigher. The only other hardware requirement is a null modem cable.

The com port of the PC connects to the RS232 port of the flowmeter with a null modemcable. The RS232 port of the flowmeter has a male DB9 or male DB25 connector,depending on the flowmeter model. If the cable length is relatively short, a remote terminalcan connect directly to the flowmeter.

For extended distances, short haul modems must be used and are available with thePlantCom Plus package (Section A.1.1). The short haul modems are supplied with theirown terminal blocks and wiring diagrams for connection to field wiring.

NOTE: If PolyLink is run from a DDF3088, one of the following is required:

! The optional RS232 Com Cable (Rev. B) which is connected directly betweenthe DDF3088 and the flowmeter. (The RS232 Com Cable is a custom nullmodem cable for use with the DDF3088.)

! The optional charging rack which docks with the DDF3088. The charging rackconnects to the flowmeter with a null modem cable through the rack’s DB25male connector (located on the right side of the rack).

Procedures provided in this document are based on connecting the DDF3088with the RS232 Com Cable.

A.1.1 PLANTCOM AND PLANTCOM PLUS

Polysonics offers two optional plant communication packages, PlantCom and PlantComPlus, which provide the following hardware for use with PolyLink:

! PlantCom: a 6 ft (1.83 m) null modem cable (DB25 female to DB25 female) and twoadapters (DB25 male to DB9 female).

! PlantCom Plus: all items provided with the PlantCom version plus two short haulmodems. These modems allow communications over a four-wire line for a distance ofseveral miles.

In addition to the above hardware, PlantCom and PlantCom Plus include the PlantComUtility Software diskette which contains several flowmeter communication and file transferutilities.

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A.2 Installing and Running PolyLinkThe procedures for installing and running PolyLink vary slightly, depending on whetherPolyLink is run from an IBM-compatible PC (Section A.2.1) or a DDF3088 (SectionA.2.2).

PolyLink comes in the self-extracting zipped file PLXXXZ.EXE. The zipped file nameused in these procedures includes the letters XXX and Z. The XXX stands for the currentsoftware version number contained in the file. The Z indicates that it is a self-extractingzipped file. For example, PolyLink software version 2.00 would be in a file namedPL200Z.EXE and would be represented in these procedures by the file namePLXXXZ.EXE. (Wherever a file name in these procedures contains the letters XXX, thecurrent software version number should be substituted for the Xs.)

A.2.1 RUNNING POLYLINK FROM AN IBM-COMPATIBLE PC

To run PolyLink from an IBM-compatible PC:

1. Ensure that the flowmeter is turned on and that the flow program is running.

2. Connect the null modem cable from the flowmeter to the PC.

IMPORTANT: When connecting PolyLink to a DDF4088, DDF4488, or DCT-6088,use the DB25 connector located beneath the keypad. (Do not use theflowmeter’s DB9 connector with PolyLink.)

3. Go to the C: prompt on the PC.

IMPORTANT: If Windows is running on the PC, totally exit Windows before going tothe C: prompt. Do not click on the MS-DOS prompt icon as a means ofgoing to the C: prompt as this may cause connectivity problems.

Use the following procedures for totally exiting Windows to theC: prompt, depending on the version of Windows that is running:

! For Windows 3.1:

- Close all applications.

- Exit the Windows session from the Program Manager window.

! For Windows 95:


- Click on the START button on the Windows 95 taskbar.

- Click on the SHUTDOWN button.

- Click on the button labeled RESTART THE COMPUTER INMS-DOS MODE.

Appendix C

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4. Create a directory called DDF (if the DDF directory does not already exist).

NOTE: To create the DDF directory, enter the following commands at the C: promptone at a time, pressing ENTER after each one:

C:

CD\

MD DDF

5. Copy PLXXXZ.EXE to the DDF directory (substituting the current version number forthe Xs):

If the file was received on diskette, it should be copied from the diskette drive. If thefile was downloaded from the BBS, it should be copied from the directory where themodem software placed it.

NOTE: To copy the file PLXXXZ.EXE to the DDF directory:

! Go to the directory where PLXXXZ.EXE is located. (If PLXXXZ.EXE islocated on diskette, insert the diskette into the diskette drive. Enter the driveletter followed by a colon and press ENTER. For example, if the diskettedrive is drive A, enter A: and press ENTER.)

! Enter the following (substituting the correct version number for the Xs) andpress ENTER:

COPY PLXXXZ.EXE C:\DDF

6. Go to the DDF directory.

NOTE: To go to the DDF directory, enter the following commands one at a time,pressing ENTER after each one:

C:

CD\

CD DDF

7. Unzip PLXXXZ.EXE by typing the file name PLXXXZ (without the extension) andpressing ENTER. (Substitute the correct version number for the Xs):

NOTE: A message may be displayed while PLXXXZ.EXE is unzipping indicatingthat a file with the same name already exists. Enter Y (for YES) forpermission to overwrite the file and press ENTER.

PLXXXZ.EXE produces the unzipped file PL.EXE.

8. Enter PL and press ENTER.

The PolyLink welcome screen is displayed.

9. Press ENTER again.

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A-89

The message CONNECTING....is displayed for several seconds while the PC and theflowmeter attempt to establish communication.

If the units connect, the VT100 screen is displayed (Figure A-1).

If the units do not connect, the RS232 settings may need to be reconfigured (SectionA.4) or Windows may still be running in the background. (Refer to the IMPORTANTcomment appearing after step 3.)

NOTE: If communicating with a DDF5088, VT100 mode is not available, and adifferent screen is displayed instead. Refer to Chapter 4 of the DDF5088manual for more information.

Figure A-1 VT100 Screen

VT100 mode provides the ability to remotely monitor and configure the flowmeter(Section A.3). From the VT100 screen, the following additional functions can beselected by pressing the appropriate function keys displayed at the bottom of thescreen:

! RS232 parameter setup (Section A.4)

! Data log file downloads and deletions (Section A.5)

! Software uploads (Section A.6)

! Graphical signal analysis for the DDF4088 and DDF4488 (Section A.7)

Appendix C

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10. To exit PolyLink from a PC, press F10 to “back out” of the program one screen at atime until the C: prompt is displayed.

A.2.2 RUNNING POLYLINK FROM A DDF3088

To run PolyLink from a DDF3088, the DDF3088 must have software version 2.2 or higherinstalled. Due to the limited size of the DDF3088 display, the PolyLink screens are slightlydifferent than those on a PC. In addition, the PolyLink options on a DDF3088 may requirea different function key. The function key options on a DDF3088 are listed above theassociated function key.

CAUTION:

Before running PolyLink from a DDF3088, note all setup parametersentered in the DDF3088 flow program. When PolyLink is run from aDDF3088, most setup parameters are erased, including those forBattery Setup. After exiting PolyLink, the DDF3088 flow programrestarts, requesting new Battery Setup parameters first.

To run PolyLink from a DDF3088:

1. Ensure that both the DDF3088 and the flowmeter are turned on and that the flowprogram is running on the flowmeter.

2. Screw the round connector of the optional RS232 Com Cable into the RS232 port ofthe DDF3088. (The RS232 port is located on the top left of the instrument farthest fromthe Polysonics logo [Figure A-2].)

Figure A-2 Connecting the RS232 Com Cable to the DDF3088

Appendix C

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3. Connect the other end of the cable to the flowmeter.

IMPORTANT: When connecting PolyLink to a DDF4088 or DDF4488, use the DB25connector located beneath the keypad. (Do not use the flowmeter’sDB9 connector with PolyLink.)

4. Unzip PLXXXZ.EXE on a computer by completing steps 3 through 7 in Section A.2.1.

5. Install PL.EXE in the C:\T directory of the DDF3088 using the HCOM file transferutility (located in the self extracting HCOMZ.EXE file). Exit HCOM when the filetransfer is complete by pressing the ESC key.

NOTE: For instructions on using HCOM, refer to the text file HCOM.TXT on thePolysonics Bulletin Board System (BBS) or on the PlantCom Utility Softwarediskette. It may be necessary to delete some or all of the data log files withHCOM if insufficient disk space is available for installing PL.EXE.

6. From the C: prompt (or C:\T prompt) of the DDF3088, run the DDF3088 flowmeterprogram by entering AUTOEXEC and pressing the YES (ENTER) key.

Answer all the prompts, pressing the YES (ENTER) key until the Battery Setup screenis displayed.

7. Enter the Battery Setup parameters, pressing ENTER after each one until the MainMenu is displayed.

8. Press F1 to select SETUP.

9. Press the DOWN ARROW key twice to scroll through the Setup menus.

10. Press F4 to select RS232 SETUP.

11. Press F3 to select POLYLINK.

The following message is displayed:

WARNING: POLYLINK WILL CAUSEFLOWMETER SETUP PARAMETERSTO BE LOST.

CONTINUE? (Y/N)

12. Press Y to continue or N to return to the SETUP menus.


13. Press ENTER.

14. Refer to the PolyLink connection information that follows step 9 in Section A.2.1.

15. To exit PolyLink from a DDF3088, press the ESC key to “back out” of the programone screen at a time until the Battery Setup screen is displayed.

NOTE: To maximize the space available for data logging, PolyLink (PL.EXE) should bedeleted from the DDF3088 when it is no longer needed. This can be done with theHCOM utility. PolyLink can be reinstalled as necessary.

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A.3 Remote Monitoring and Configuring (VT100 Mode)When PolyLink successfully connects to one of the following flowmeters, the VT100screen is displayed:

! DDF4088 ! DCT-7088

! DDF4488 ! ISTT

! DCT-6088 ! ISTT-P

VT100 mode provides the ability to remotely monitor and configure the flowmeter. Fromthe VT100 screen, additional functions can be selected by pressing the appropriate functionkeys listed at the bottom of the screen (Figure A-1).

In VT100 mode, the remote terminal has the same data displayed as the flowmeter’s LCDdisplay. In addition, the keys on the remote terminal program the flowmeter in the samemanner as the corresponding keys on the flowmeter’s keypad. The corresponding keys arelisted in Table A-2:

Table A-2Corresponding Keys on

Flowmeter and Remote TerminalFlowmeter Keypad Remote Terminal

Keyboard

Arrow keys Arrow keys

Enter key Enter key

Menu key M key

Numeric keys 0-9 Numeric keys 0-9

Period key (.) Period key (.)

+/- key - key

Erase key Delete key orbackspace key

NOTE: VT100 mode is not available if the PC is connected to a DDF3088 or a DDF5088.However, the DDF5088 can be remotely monitored and configured in PolyLinkusing a non-VT100 mode. Refer to Chapter 4 of the DDF5088 manual for moreinformation.

A.3.1 DIAGNOSTIC DISPLAY MODE

If an ISTT or ISTT-P flowmeter is connected to a remote terminal, the VT100 screen canbe displayed in either the normal mode or the Diagnostic Display mode. In the DiagnosticDisplay mode, data is continually being updated on the display to correspond to changes inflow or to changes made in the flowmeter’s setup parameters. The data is updated "inplace" so that the display can be viewed without the data continually scrolling up thescreen.

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To enter the Diagnostic Display mode from the normal VT100 mode, press TAB on theremote terminal keyboard. The following is displayed:

UNIT I.D. #0 ISTT DIAGNOSTIC DISPLAY 00:0000-00-00

UP DOWN SCALEFACTOR....

.09850

WIN_DLY(us).....

54 54 ZERO OFFSET(GPD)

0.00

SE>R.............

1.00

0.98 nsecOFFSET......

2.46

BIAS.............

0.92

0.88 usecOFFSET......

0.35

AGC..............

1.45

1.51 XMT_DET_DLY(us)..

0.0000

SIG.STG.........

7 6 AERATIONFACTOR..

1.0000

MISSED 0 0 TRANSDUCER: STANDARD/V

TIME(us)........

48.2

49.2

FLUID (F/S)......5750.96

DEL TIME(ns)....

-1.94

-1.93 REYNOLDSNO.......

4000

DIFFCOUNT.......

91 PROFILEFACTOR....

0.7500

PZX..............

3699

ACO........(0.00)

-1.93

FLOW: -1351.367GPD

AERATION.........

13.58 11.72 15.794954

SE-U (3) :0.02 0.02 0.02 * 3.95 4.22 4.32 4.22 4.224.36 4.24 SE-D (3) :0.02 0.02 0.02 * 3.85 4.16 4.22 4.14 4.164.14 4.14

Appendix C

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Figure A-3 Diagnostic Display Screen (ISTT/ISTT-P)

Pressing TAB a second time exits the Diagnostic Display mode and returns the display tothe normal VT100 mode.

NOTE: The Diagnostic Display Mode is not available for the ISTT or ISTT-P whenrunning PolyLink on a DDF3088.

Appendix C

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A.4 RS232 SetupIf the remote terminal has difficulty connecting with the flowmeter, the RS232 settingsmay need to be reconfigured. If so, the CONNECTING.... message is displayed forapproximately 30 seconds and the following message is displayed:

COMMUNICATION ERRORPRESS ESC KEY TO EXIT POLYLINK,ANY OTHER KEY TO SETUP RS232...

After pressing a key, the RS232 Setup screen is displayed:

RS232 Setup

Use ↑↑↑↑ ↓↓↓↓ keys to modify item.Use ←←←← →→→→ keys to select item.

PORT: COM1

Figure A-4 RS232 Setup Screen

To configure the RS232 settings:

1. Use the RIGHT and LEFT ARROW keys to select a parameter (com port, baud rate,parity, stop bits, and character size).

2. Use the UP and DOWN ARROW keys to modify the selected parameter.

3. Select SET to save the settings and to exit the RS232 Setup screen.

NOTE: The first time that PolyLink is run on the remote terminal, the RS232 Setupscreen is displayed. This is normal. Verify that the RS232 settings are correctand select SET to save the settings for future PolyLink connections.

Appendix C

A-96

A.5 Data LoggerData log files can be deleted from the flowmeter’s memory or transferred from theflowmeter to a remote terminal for record keeping and analysis. In addition, if PolyLink isrun from a DDF3088, the transferred data log files can be viewed in strip chart format(Section A.5.2).

To display the data logger screen, select DATA LOGGER from the VT100 screen (FigureA-5). The number of data log files available for transfer is displayed in the top left cornerof the screen.

NOTE: The DDF4088 and each channel of the DDF4488 have one data log file each withapproximately 10.000 data points. The DCT-6088 has one data log file withapproximately 50,000 data points. The data logger in these flowmeters is alwaysenabled (always recording data). When all available data points are recorded, thedata logger records over the previous data points one at a time, starting with theoldest points first, in a continuous loop.

5 DATA LOG FILE(S)

Figure A-5 Data Logger Screen

Appendix C

A-97

A.5.1 TRANSFERRING A DATA LOG FILE

To transfer a data log file:

1. From the Data Logger screen, use the arrow keys to select a data log file.

2. Select TRANSFER FILE.


ENTER DESTINATION FILE NAME:

3. Enter the new file name for the transferred file and press ENTER.

NOTE: The following rules apply to the new name selected for the data log file:

! The new file name for the transferred file may have up to eight validcharacters and an extension of up to three valid characters.

! If running PolyLink from a PC and the destination for the file is differentthan the current directory used by PolyLink, a full path file name should beentered.

! If running PolyLink from a DDF3088, the destination for the file ispredetermined and is not selectable. In addition, to be able to view thetransferred file on the DDF3088 in strip chart format, the new file namemust include a .DFM extension.

After the file name is entered, the following is displayed:

DISPLAY XXXXXXXX’S INFORMATION:DATE: 00-00-00TIME: 00:00:00UNITS: XXXCONVF 0.00000000e+00INTERVAL: 0.000SIZE: 0

A rotating cursor is displayed indicating that the transfer is in progress. After thetransfer is finished, the following is displayed:

TRANSFER COMPLETE

A.5.2 VIEWING A DATA LOG FILE IN STRIP CHART FORMAT

If PolyLink is run from a DDF3088 (Section A.2.2), any transferred data log files whichcontain a .DFM extension can be viewed as strip charts in the DDF3088 flow program.

To view a transferred file in strip chart format on a DDF3088:

1. Press the ESC key on the DDF3088 twice to exit PolyLink.

2. Enter the Battery Setup parameters for the DDF3088 flow program, pressing ENTERafter each one.

Appendix C

A-98

The DDF3088 Main Menu is displayed.

3. Press F1 to select SETUP.

4. Press the DOWN ARROW key twice to scroll through the setup menus.

5. Press F3 to select DATA LOG.

6. Press F4 to select VIEW FILES.

7. Use the ARROW keys to move the cursor to the desired file.

8. Press F1 to select the strip chart function.

The selected file is displayed as a strip chart on the display of the DDF3088. Since thefiles are drawn on the screen one data point at a time, large files require more time tobe displayed than small files.

A.5.3 DELETING A DATA LOG FILE

To delete a data log file:

1. From the Data Logger screen, select DELETE FILE.


DELETE ’XXXXXXX’. ARE YOU SURE? [Y/N]

2. Press Y to continue or N to cancel the delete request.

3. Press ENTER.

NOTE: If the delete function is selected for the DDF4088, DDF4488, or DCT-6088, thedata log file itself is not deleted, but the data points in it are cleared (set to zero).

A.6 Uploading Software on the DDF4088 and DDF4488PolyLink can be used to upload software for the DDF4088 and DDF4488. The softwareupgrades are provided in the self-extracting zipped file 4088XXXZ.EXE. The zipped filename used in these procedures includes the letters XXX and Z. The XXX stands for thecurrent software version number contained in the file. The Z indicates that it is aself-extracting zipped file. For example, DDF4088 software version 2.01 would be in a filenamed 4088201Z.EXE and would be represented in these procedures by the file name4088XXXZ.EXE. (Wherever a file name in these procedures contains the letters XXX, thecurrent software version number should be substituted for the Xs.)

The software upgrade file is available on diskette from Polysonics or by modem downloadfrom the Polysonics Bulletin Board System (BBS) at (713) 933-1901. (For procedures onusing the BBS, refer to the file BBS.TXT, available on the PlantCom Utility Softwarediskette.)

Appendix C

A-99

A.6.1 UPGRADING THE FLOWMETER SOFTWARE WITH POLYLINK

This section describes how to upgrade the flowmeter’s software using the PolyLink utility.

IMPORTANT: For initial software upgrades of the DDF4088 (that is, DDF4088 upgradesfrom version 1.0 to any other version), a utility other than PolyLink is used.Refer to Section A.6.2.

To upgrade the flowmeter software using the PolyLink utility:

1. Complete steps 1 through 4 in Section A.2.1 (to prepare to run PolyLink and to createthe DDF directory). Do not run PolyLink yet.

NOTE: If using a DDF3088 to run PolyLink, ensure that the DDF3088 is properlyconnected to the flowmeter with the RS232 Com Cable (Rev B) bycompleting steps 1 through 3 in Section A.2.2.

2. Copy the software upgrade file to the DDF directory.


NOTE: To copy the software upgrade file to the DDF directory:

! Go to the directory where the software upgrade file is located. (If it islocated on diskette, insert the diskette into the diskette drive. Enter the driveletter followed by a colon and press ENTER. For example, if the diskettedrive is drive A, enter A: and press ENTER.)

! Enter the following command (substituting the correct version number forthe Xs) and press ENTER:

COPY 4088XXXZ.EXE C:\DDF



C:

CD\

CD DDF

4. To unzip the software upgrade file, enter the following file name (without theextension) and press ENTER:

4088XXXZ

IMPORTANT: Substitute the correct version number for the Xs.

NOTE: A message may be displayed during the unzipping process indicating that afile with the same name already exists. Enter Y (for yes) for permission tooverwrite the file and press ENTER whenever this occurs.

Appendix C

A-100

Unzipping 4088XXXZ.EXE produces several files, including:

! 4088.EXE

! PLXXXZ.EXE

NOTE: PLXXXZ.EXE is a zipped file containing the file PL.EXE. It should beunzipped by typing PLXXXZ (substituting the correct version number for theXs) and pressing ENTER before continuing.

5. From the DDF directory run PolyLink by entering PL and pressing ENTER.

NOTE: If using a DDF3088, complete the following steps:

! Use the HCOM utility to delete all unnecessary files from the C:\Tdirectory. (For instructions on using HCOM, refer to the text fileHCOM.TXT on the Polysonics Bulletin Board System [BBS] or on thePlantCom Utility Software diskette.)

! Use HCOM to transfer PL.EXE and 4088.EXE to the C:\T directory.

! Exit HCOM by pressing the ESC key on the DDF3088.

! Run PolyLink on the DDF3088 by completing steps 6 through 12 inSection A.2.2.


NOTE: If the units have trouble connecting, refer to the connection informationfollowing step 9 in Section A.2.1.

6. Press ENTER again to display the VT100 screen.

Appendix C

A-101

7. From the VT100 screen select S/W UPLOAD.

The Software Upload Screen is displayed:

Software Upload

ENTER FLOWMETER PROGRAM FILE NAME:

Figure A-6 Software Upload Screen

8. Enter 4088.EXE and press ENTER:

A rotating cursor is displayed indicating that the file is transferring to the flowmeter.After the transfer is complete, the following message is displayed:

UPLOAD COMPLETE.RESTART THE FLOWMETER. (CONSULT CURRENT INSTRUCTION MANUALOR ADDENDUM.)PRESS ANY KEY...

9. Exit PolyLink (before restarting the flowmeter).

10. Restart the flowmeter by turning the power off and back on.

While the flowmeter is initializing, the new software version number momentarilyappears on the flowmeter's display to indicate a successful upgrade. In addition, thesoftware version number can be verified by viewing it in the flowmeter’s softwaredisplay menu.

Appendix C

A-102

NOTE 1: If a prompt is displayed on the DDF4088 requesting a serial number, refer toSection A.6.3.

NOTE 2: If the software upgrade was performed from a DDF3088, the softwareupgrade files should be deleted from the DDF3088 using the HCOM utility.This allows more space for recording data log files. However, if sufficientspace exists for normal data log recording, PL.EXE may be left in place forfuture usage of PolyLink.

A.6.2 INITIAL UPGRADES OF THE DDF4088 (NON-POLYLINK UPGRADE)

There are two separate procedures for upgrading the DDF4088, depending on the versionof software that is currently installed in the flowmeter, as follows:

! Procedure for initial upgrades (that is, upgrades from version 1.0 to any other version)

! Procedure for all subsequent upgrades (that is, all upgrades from version 1.1 or higherto any other version)

Initial upgrades of a DDF4088 do not use the PolyLink utility, but the initial upgradeprocedure is provided in this section for reference. Once the initial upgrade is performed,all subsequent upgrades are handled through PolyLink (Section A.6.1).

To perform an initial upgrade of the DDF4088:

1. Turn off power to the DDF4088.

2. Open the door on the DDF4088 and remove the sheetmetal access cover (attached bytwo screws).

3. Connect a null modem cable to the DB9 connector on the main board of the DDF4088(not to the DB25 connector as is done with PolyLink).

4. Connect the other end of the null modem cable to the PC.

NOTE: If using a DDF3088, skip steps 3 and 4. Connect the round end of the RS232Com Cable to the RS232 port of the DDF3088 (Figure A-2). Connect theother end of the cable to the DB9 connector of the DDF4088.

Appendix C

A-103

5. Go to the C: prompt on the PC.

IMPORTANT: If Windows is running on the PC, totally exit Windows before going tothe C: prompt. Do not click on the MS-DOS prompt icon as a means ofgoing to the C: prompt as this may cause connectivity problems.

Use the following procedures for totally exiting Windows to theC: prompt, depending on the version of Windows that is running:

! For Windows 3.1:


- Exit the Windows session from the Program Manager window.

! For Windows 95:


- Click on the START button on the Windows 95 taskbar.

- Click on the SHUTDOWN button.

- Click on the button labeled RESTART THE COMPUTER INMS-DOS MODE.

6. Create a directory called DDF (if the DDF directory does not already exist).

NOTE: To create the DDF directory, enter the following commands at the C: promptone at a time, pressing ENTER after each one:

C:

CD\

MD DDF

7. Copy 4088XXXZ.EXE to the DDF directory (substituting the current version numberfor the Xs):


NOTE: To copy the file 4088XXXZ.EXE to the DDF directory:

! Go to the directory where 4088XXXZ.EXE is located. (If 4088XXXZ.EXEis located on diskette, insert the diskette into the diskette drive. Enter thedrive letter followed by a colon and press ENTER. For example, if thediskette drive is drive A, enter A: and press ENTER.)

! Enter the following (substituting the correct version number for the Xs) andpress ENTER:

COPY 4088XXXZ.EXE C:\DDF

Appendix C

A-104



C:

CD\

CD DDF

9. Unzip 4088XXXZ.EXE by typing the file name 4088XXXZ (without the extension)and pressing ENTER. (Substitute the correct version number for the Xs).

NOTE: A message may be displayed during the unzipping process indicating that afile with the same name already exists. Enter Y (for yes) for permission tooverwrite the file and press ENTER whenever this occurs.

Unzipping 4088XXXZ.EXE produces several files, including:

! UPGR4088.BAT

! COMM.EXE

! SELECTKB.EXE

! STARTUP.BAT

! 4088.EXE

NOTE: If using a DDF3088, complete the following steps:

! Use the HCOM utility to delete all unnecessary files from the C:\Tdirectory. (For instructions on using HCOM, refer to the text fileHCOM.TXT on the Polysonics Bulletin Board System [BBS] or on thePlantCom Utility Software diskette.)

! Use HCOM to transfer the unzipped files listed above to the C:\T directory.

! Exit HCOM by pressing the ESC key on the DDF3088.

! Enter the following commands, pressing YES (ENTER) after each one, togo to the C:\T directory of the DDF3088:

CD\

CD\T

Appendix C

A-105

10. Enter UPGR4088 and press ENTER if the cable is connected to com port 1.

NOTE: The DDF3088 uses com port 1.

A flashing cursor appears in the upper left corner of the screen.

NOTE: If the cable is connected to a com port other than com port 1, do not enterUPGR4088. Instead enter the following command (substituting the X for thecorrect com port number) and press ENTER:

COMM /B9600 /COMX

Ensure that there is a space after COMM and after B9600.

11. Disconnect power from the DDF4088.

12. Reconnect power to the DDF4088.

13. Press ESCAPE immediately after the displayed memory check has completed andbefore the batch file finishes running.

A series of messages is displayed, including BAD OR MISSING (B:\CONFIG.SYS).This is normal and no corrective actions are necessary. After several seconds, the B:\prompt is displayed.

If the batch file does not run and the B:\ prompt is not displayed, the RS232 settingsmay need to be reconfigured and steps 10 through 13 repeated. (For help inreconfiguring the RS232 settings on a PC, press F1.)

IMPORTANT: If the A: prompt is ever displayed, enter B: and press ENTER beforeproceeding.

14. From the B:\ prompt enter DEL *.* and press ENTER.

A message is displayed indicating that all files in the current directory will be deleted.

15. Enter Y (for yes) for permission to delete the files and press ENTER.

16. Enter TRANSFER -R 4088.EXE and press ENTER.

NOTE: Ensure that there is a space after TRANSFER and after -R. (On a DDF3088,the hyphen character is accessed by simultaneously pressing the SHIFT and Kkeys.)

The message RECEIVING 4088.EXE... is displayed indicating that the B: drive isready to receive the file. Do not wait for the file to be received, but go immediately tothe next step. The transfer may not occur and the program may lock up if too muchtime elapses between keyboard entries. If this occurs, the PC may need to be restarted.

17. Press the PgUp key.


UPLOAD WHICH FILE:

Appendix C

A-106

18. Enter 4088.EXE and press ENTER.


UPLOAD 4088.EXE ASCII OR XMODEM (A OR X):

19. Press X for XMODEM. (Do not press ENTER.)


UPLOADING 4088.EXEXXXXX BYTES, XXX BLOCK(S)TRANSFER TIME: X MIN X SEC

NOTE: If a DDF3088 is used, the LCD cannot display the entire message due to spacelimitations.

After a few seconds the transfer begins, as indicated by a series of Ts. A message isdisplayed indicating when the transfer is complete.

20. Enter 4088 on the PC and press ENTER to run the new software on the flowmeter.(While the flowmeter is initializing, the new software version number momentarilyappears on the flowmeter's display.)

IMPORTANT: Verify that the software on the flowmeter is running properly beforeproceeding to the next step.

21. Enter TRANSFER -R STARTUP.BAT and press ENTER.

The message RECEIVING STARTUP.BAT... is displayed indicating that the B: driveis ready to receive the file. Do not wait for the file to be received, but go immediately tothe next step.

22. Press the PgUp key.


UPLOAD WHICH FILE:

23. Enter STARTUP.BAT and press ENTER.


UPLOAD STARTUP.BAT ASCII OR XMODEM (A OR X):

24. Press X for XMODEM. (Do not press ENTER.)


UPLOADING STARTUP.BATXXXXX BYTES, XXX BLOCK(S)TRANSFER TIME: X MIN X SEC

After a few seconds the transfer begins, as indicated by a series of Ts. A message isdisplayed indicating when the transfer is complete.

Appendix C

A-107

25. Exit from the upgrade procedure by holding down the ALT key while pressing X.

NOTE 1: If a prompt is displayed on the DDF4088 requesting a serial number, refer toSection A.6.3.

NOTE 2: If using a DDF3088, complete the following steps:

! Exit the upgrade procedure by restarting the DDF3088. (To restart theunit, hold down the two shift buttons and the red power button for severalseconds until the screen turns black.)

! After all flowmeters have been upgraded, use HCOM to delete theunzipped software upgrade files from the DDF3088. (This allows morespace for recording data log files.)

A.6.3 ENTERING THE SERIAL NUMBER FOR DDF4088 UPGRADES

If a DDF4088 was upgraded from version 1.1 to any higher version, the following isdisplayed after the flowmeter initializes with the new software:

ENTER SERIAL #

=

Enter the serial number which is located on a label attached to the flowmeter (ignoring anyletters if present) and press ENTER.

IMPORTANT: The serial number must be entered very carefully. The correct serialnumber is essential if the flowmeter is being upgraded to multi-channeloperation. (It defaults to single-channel mode if entered incorrectly.)Special service is required by the factory to remedy an incorrectly enteredserial number.

A.7 Graphical Signal Analysis for the DDF4088 and DDF4488PolyLink can display a graphic representation of the signal received by a DDF4088 andDDF4488. The signal analysis function allows the user to visually observe the signal beingreceived and interpret signal quality, the presence of interference, etc. This feature isavailable whether PolyLink is run from an IBM-compatible PC or from a DDF3088.

Undesirable frequencies may be produced by a variety of sources at the measurement sitesuch as vibration, interference from motor controllers, etc. Special interference frequencyfilters can be set and custom signal processing schemes designed for those difficultapplications where other instruments may not function at all.

The signal can be displayed as a waveform in the frequency (FFT) domain (Figure A-7) orin the time (SIG) domain (Figure A-8).

Appendix C

A-108

Figure A-7 Signal Analysis Screen (Signal Displayed in the Frequency [FFT] Domain)

Figure A-8 Signal Analysis Screen (Signal Displayed in the Time [SIG] Domain)

Appendix C

A-109

To use the signal analysis function:

1. From the VT100 screen, select SIG. ANAL.

The Signal Analysis screen is displayed:

Figure A-9 Signal Analysis Screen (with Interference Present)

In the example displayed in Figure A-9, the desired signal appears as a typical bell-shapedcurve on the left. An isolated peak near the center of the display has been identified as aninterference signal. The median point of the signal appears in the upper right corner of thedisplay and is indicated at the bottom of the display by a small arrow.

2. If the filter is currently disabled, select FILTER ENABLE.

3. Select FILTER.

Two brackets are displayed as thin vertical lines on the screen (Figure A-10). Thesebrackets are used to define filters for eliminating interference frequencies from thesignal spectrum.

NOTE: Select a specific bracket by pressing the UP ARROW key. Move the selectedbracket by pressing the RIGHT and LEFT ARROW keys. Select fine or coarsebracket movement by pressing the DOWN ARROW key.

Appendix C

A-110

4. Position the brackets until the interference signal is enclosed by the brackets (FigureA-10):

Figure A-10 Positioning Brackets around Interference Frequency

Appendix C

A-111

5. Select SET FILTER to set the filter and reject the bracketed frequencies (Figure A-11).

The signal is displayed with the frequencies rejected:

Figure A-11 Signal with Frequencies Rejected

NOTE: Several filters can be in effect simultaneously by repeating steps 4 and 5 foreach desired filter.

6. To re-do the filter setting procedure, select REDO. (All filters are cleared and new datais gathered for another attempt.)

7. Select EXIT to return to the first Signal Analysis screen to view the effects of the filterson the signal.

The signal can now be displayed either with or without the filters in place by selectingFILTER ENABLE or FILTER DISABLE.

Appendix C

A-112

PIPE SCHEDULESThis appendix provides pipe schedules as a convenient reference for the following pipematerials:

! Steel, stainless steel, and PVC (Table B-1)

! Cast iron (Table B-2)

! Ductile iron (Table B-3)

The inside diameters (IDs) listed in the following tables are calculated from the outsidediameter and minimum wall thicknesses as specified in applicable standards. The actualpipe inside diameter may vary from the dimension listed in the tables by as much as 25%of the pipe minimum wall thickness. The accuracy of flow rate measurement is enhanced ifthe pipe ID is actually measured.

Appendix

-113

Table B-1Steel, Stainless Steel, and PVC Pipe Standard SchedulesInside Diameter (ID) and Outside Diameter (OD) in Inches

al Pipe OutsideDiameter (OD)

Sched. 5 Sched. 10(Light wall)

Sched. 20 Sched. 30 Sched. 40 Sched. 60 Sched. 80 Sched. 100 Sched. 120 Sched. 140 Sched. 160 Std. Wall X STG

1.315

1.660

1.900

2.375

2.875

1.185

1.530

1.770

2.245

2.709

1.097

1.442

1.682

2.157

2.635

1.049

1.380

1.610

2.067

2.469

0.957

1.278

1.500

1.939

2.323

0.815

1.160

1.338

1.687

2.125

1.049

1.380

1.610

2.067

2.469

0.957

1.278

1.500

1.939

2.323

3.500

4.000

4.500

5.563

6.625

3.334

3.834

4.334

5.345

6.407

3.260

3.760

4.260

5.295

6.357

3.068

3.548

4.026

5.047

6.065

2.900

3.364

3.826

4.813

5.761

3.624

4.563

5.501

2.624

3.438

4.313

5.187

3.068

3.548

4.026

5.047

6.065

2.900

3.364

3.826

4.813

5.761

8.625

10.750

12.750

14.000

16.000

8.407

10.482

12.438

15.670

8.329

10.420

12.390

13.500

15.500

8.125

10.250

12.250

13.376

15.376

8.071

10.136

12.090

13.250

15.250

7.981

10.020

11.938

13.124

15.000

7.813

9.750

11.626

12.812

14.688

7.625

9.562

11.374

12.500

14.312

7.437

9.312

11.062

12.124

13.938

7.187

9.062

10.750

11.876

13.562

7.001

8.750

10.500

11.500

13.124

6.813

8.500

10.126

11.188

12.812

7.981

10.020

12.000

13.250

15.250

7.625

9.750

11.750

13.000

15.000

18.000

20.000

24.000

30.000

36.000

17.670

19.634

23.564

29.500

17.500

19.500

23.500

29.376

35.376

17.376

19.250

23.250

29.000

35.000

17.124

19.000

22.876

28.750

34.750

16.876

18.812

22.624

28.500

34.500

16.500

18.376

22.062

16.124

17.938

21.562

15.688

17.438

20.938

15.255

17.000

20.376

14.876

16.500

19.876

31.876

14.438

16.062

19.312

31.312

17.250

19.250

23.250

29.250

35.250

17.000

19.000

23.000

29.000

35.000

42.000

48.000

41.000 40.750 40.500

47.250

41.250

47.250

41.000

47.000

7088-8000

-114

Table B-2Cast Iron Pipe Standard Classes

Inside Diameter (ID)1 and Outside Diameter (OD) in InchesClass A Class B Class C Class D Class E Class F Class G Class H

minale OD ID OD ID OD ID OD ID OD ID OD ID OD ID OD ID

3.80

4.80

6.90

9.05

11.10

3.02

3.96

6.02

8.13

10.10

3.96

5.00

7.10

9.05

11.10

3.12

4.10

6.14

8.03

9.96

3.96

5.00

7.10

9.30

11.40

3.06

4.04

6.08

8.18

10.16

3.96

5.00

7.10

9.30

11.40

3.00

3.96

6.00

8.10

10.04

7.22

9.42

11.60

6.06

8.10

10.12

7.22

9.42

11.60

6.00

8.10

10.00

7.38

9.60

11.84

6.08

8.10

10.12

7.38

9.60

11.84

6.00

8.00

10.00

13.20

15.30

17.40

19.50

21.60

12.12

14.16

16.20

18.22

20.26

13.20

15.30

17.40

19.50

21.60

11.96

13.98

16.00

18.00

20.00

13.50

15.65

17.80

19.92

22.06

12.14

14.17

16.20

18.18

20.22

13.50

15.65

17.80

19.92

22.06

12.00

14.01

16.02

18.00

20.00

13.78

15.98

18.16

20.34

22.54

12.14

14.18

16.20

18.20

20.24

13.78

15.98

18.16

20.34

22.54

12.00

14.00

16.00

18.00

20.00

14.08

16.32

18.54

20.78

23.02

12.14

14.18

16.18

18.22

20.24

14.08

16.32

18.54

20.78

23.02

12.00

14.00

16.00

18.00

20.00

25.80

31.74

37.96

44.20

50.50

24.28

28.98

35.98

42.00

47.98

25.80

32.00

38.30

44.50

50.80

24.02

29.94

36.00

41.94

47.96

26.32

32.40

38.70

45.10

51.40

24.22

30.00

35.98

42.02

47.98

26.32

32.74

39.16

45.58

51.98

24.00

30.00

36.00

42.02

48.00

26.90

33.10

39.60

24.28

30.00

36.00

26.90

33.46

40.04

24.00

30.00

36.00

27.76 24.26 27.76 24.00

56.66

62.80

75.34

87.54

53.96

60.02

72.10

84.10

57.10

63.40

76.00

88.54

54.00

60.06

72.10

84.10

57.80

64.20

76.88

54.00

60.20

72.10

58.40

64.82

53.94

60.06

r pipes with cement linings, reduce the pipe inside diameter by two times the lining thickness. Standard and double cement lining thicknesses are listed in ble B-3.

7088-8000

-115

Table B-3Ductile Iron Pipe Standard Classes

Inside Diameter (ID) and Outside Diameter (OD) in InchesInside diameter Cement lining1

minale Size

OutsideDiameter (OD) Class 50 Class 51 Class 52 Class 53 Class 54 Class 55 Class 56

StandardThickness

DoubleThicknes

3.96

4.80

6.90

9.05

11.10

13.20

6.40

8.51

10.52

12.58

3.46

4.28

6.34

8.45

10.46

12.52

3.40

4.22

6.28

8.39

10.40

12.46

3.34

4.16

6.22

8.33

10.34

12.40

3.28

4.10

6.16

8.27

10.28

12.34

3.22

4.04

6.10

8.21

10.22

12.28

3.16

3.98

6.04

8.15

10.16

12.22

0.125 0.250

15.30

17.40

19.50

21.60

25.80

14.64

16.72

18.80

20.88

25.04

14.58

16.66

18.74

20.82

24.98

14.52

16.60

18.68

20.76

24.92

14.46

16.54

18.62

20.70

24.86

14.40

16.48

18.56

20.64

24.80

14.34

16.42

18.50

20.58

24.74

14.28

16.36

18.44

20.52

24.68

0.1875 0.375

32.00

38.30

44.50

50.80

57.10

31.22

37.44

43.56

49.78

55.96

31.14

37.34

43.44

49.64

55.80

31.06

37.06

43.32

49.50

55.64

30.98

37.14

43.20

49.36

55.48

30.90

37.04

43.08

49.22

55.32

30.82

36.94

42.96

49.08

55.16

30.74

36.84

42.84

48.94

55.00

0.250 0.500

r pipes with cement linings, reduce the pipe inside diameter by two times the lining thickness listed above.

7088-8000

-116

RELATIONSHIP BETWEEN SPECIFICGRAVITY, VISCOSITY, AND SOUNDVELOCITY FOR PETROLEUM PRODUCTS

Figure C-1 is a graph showing the approximate relationship between specific gravity,viscosity and sound velocities for aliphatic hydrocarbons (petroleum products).

Appendix

-117

Figure C-1 Approximate Relationship between Specific Gravity Viscosity, and Sound Velocityfor Petroleum Products

7088-8000

-118

FLUID SOUND VELOCITIES ANDKINEMATIC VISCOSITIES

The information in the following "Fluid Sound Velocities and Kinematic Viscosities" tableis based on material from the Cameron Hydraulic Data Book (17th ed., Ingersoll-Rand,1988) and Tables of Physical and Chemical Constants (13th ed., Longmans, 1966).

Appendix

-119

LIQUID t0000C c(m/s) t0000F c(ft/s) cSt

Acetaldehyde CH3CHO 16.120

------

6168

------

0.3050.295

Acetic acid 50 1584 122 5196 ---

10% .................................................. 15 --- 59 --- 1.35

50% .................................................. 15 --- 59 --- 2.27

80% .................................................. 15 --- 59 --- 2.85

Conc.-glacial ................................... 15 --- 59 --- 1.34

Acetic anhydride 2415

1384---

7559

4540---

---0.88

Acetone CH3COCH3 20 1190 68 3903 0.41

Acetylene tetrabromide 28 1007 82 3303 ---

Acetylene tetrachloride 28 1155 82 3788 ---

Alcoholallyl .................................................. 20

40------

68104

------

1.600.90

butyl-n.............................................. 2070

------

68158

------

3.641.17

ethyl (grain) C2H5OH...................... 2037.8

------

68100

------

1.521.2

methyl (wood) CH3OH .................... 150

------

5932

------

0.741.04

propyl ............................................... 2050

------

68122

------

2.81.4

Ammonia -17.8 --- 0 --- 0.30

Amyl acetate 29.2 1173 85 3847 ---

n-Amyl alcohol 28.6 1224 83 4015 ---

iso-Amyl ether 26 1153 79 3782 ---

Aniline 2010

1656---

6850

5432---

4.376.4

Argon -183.0 816.7 -297 2679 ---

7088-8000

-120


Asphalt, blendedRC-0, MC-0, SC-0 ........................... 25

37.8------

77100

------

159 - 32460 - 108

RC-1, MC-1, SC-1 ........................... 37.850

------

100122

------

518 - 1080159 - 324

RC-2, MC-2, SC-2 ........................... 5060

------

122140

------

518 - 1080215 - 430

RC-3, MC-3, SC-3 ........................... 5060

------

122140

------

1295 - 2805540 - 1080

RC-4, MC-4, SC-4 ........................... 6082.8

------

140180

------

1725 - 4315270 - 540

RC-5, MC-5, SC-5 ........................... 6082.8

------

140180

------

6040 - 18340647 - 1295

RS-1, MS-1, SS-1 ............................ 2537.8

------

77100

------

33 - 21619 - 75

Asphalt emulsionsFed #1 .............................................. 25

37.8------

77100

------

215 - 151075 - 367

Fed #2, V, VI ................................... 2537.8

------

77100

------

33 - 21619 - 75

Automotive crankcase oilsSAE-5W........................................... -17.8 --- 0 --- 1295 max

SAE-10W......................................... -17.8 --- 0 --- 1295 - 2590

SAE-20W......................................... -17.8 --- 0 --- 2590 - 10350

SAE-20 ............................................ 98.9 --- 210 --- 5.7 - 9.6

SAE-30 ............................................ 98.9 --- 210 --- 9.6 - 12.9

SAE-40 ............................................ 98.9 --- 210 --- 12.9 - 16.8

SAE-50 ............................................ 98.9 --- 210 --- 16.8 - 22.7

Automotive gear oilsSAE-75W......................................... 98.9 --- 210 --- 4.2 min

SAE-80W......................................... 98.9 --- 210 --- 7.0 min

SAE-85W......................................... 98.9 --- 210 --- 11.0 min

SAE-90 ............................................ 98.9 --- 210 --- 14 - 25

SAE-14Q.......................................... 98.9 --- 210 --- 25 - 43

SAE 150........................................... 98.9 --- 210 --- 43 Min.

Beer 20 --- 68 --- 1.8

7088-8000

-121

LIQUID t0000C c(m/s) t0000F c(ft/s) cStBenzene (Benzol) C6H6 20

01321

---6832

4333---

0.7441.00

Benzophenone 100 1316 212 4316 ---

Bismuth 285 1663 545 5455 ---

Bone Oil 54.4100

------

130212

------

47.511.6

Bromine 20 --- 68 --- 0.34

Bromobenzene 50 1074 122 3523 ---

Bromoform 25 908 77 2978 ---

Butane-n -1.1---

------

-5030

------

0.520.35

Butyl acetate 30 1172 86 3844 ---

n-Butyl alcohol 20 1257.7 68 4125 ---

iso-Butyl bromide -104 1450 -155 4756 ---

Butyric acid n 200

------

6832

------

1.612.3cp

Cadmium 360 2150 680 7052 ---

Caesium 130 967 266 3172 ---

Calcium chloride5%.................................................... 18.3 --- 65 --- 1.156

25% .................................................. 15.6 --- 60 --- 4.0

Carbolic acid (phenol) 18.3 --- 65 --- 11.83

Carbon tetrachloride CCI4 2037.8

------

68100

------

0.6120.53

Carbon disulphide CS2 250

20

1149------

773268

3769------

---0.33

0.298

Carbon tetrachloride 20 938 68 3077 ---

Castor oil 18.637.854.4

1500------

65100130

4920------

---259-325

98-130

China wood oil 20.637.8

------

69100

------

308.5125.5

Chlorine 20 850 68 2788 ---

m-Chlornitrobenzene 40 1368 104 4487 ---

Chlorobenzene 25 1302 77 4271 ---

7088-8000

-122

LIQUID t0000C c(m/s) t0000F c(ft/s) cStChloroform 20

2560

---995

---

6877

140

---3264

---

0.38---

0.35

Cocoanut oil 37.854.4

------

100130

------

29.8 - 31.614.7 - 15.7

Cod oil 37.854.4

------

100130

------

32.119.4

Corn oil 54.4100

------

130212

------

28.78.6

Corn starch solutions22 Baume......................................... 21.1

37.8------

70100

------

32.127.5

24 Baume......................................... 21.137.8

------

70100

------

129.895.2

25 Baume......................................... 21.137.8

------

70100

------

303173.2

Cotton seed oil 37.854.4

------

100130

------

37.920.6

Crude Oil48°°°°API ............................................. 15.6

54.4------

60130

------

3.81.6

40°°°°API ............................................. 15.654.4

------

60130

------

9.73.5

35.6 API........................................... 15.654.4

------

60130

------

17.84.9

32.6 API........................................... 15.654.4

------

60130

------

23.27.1

Salt Creek ........................................ 15.654.4

------

60130

------

776.1

Cyclohexane 20 1278 68 4192 ---

Cyclohexanol 30 1622 86 5320 ---

Decane-n -17.837.8

------

0100

------

2.361.001

l-Decene 20 1250 68 4100 ---

Deuterium oxide 20 1381 68 4530 ---

7088-8000

-123


Diesel fuel oils2D .................................................... 37.8

54.4------

100130

------

2 - 61. - 3.97

3D .................................................... 37.854.4

------

100130

------

6 - 11.753.97 - 6.78

4D .................................................... 37.854.4

------

100130

------

29.8 max13.1 max

5D .................................................... 5071.1

------

122160

------

86.6 max35.2 max

Diethyl Ether 20 --- 68 --- 0.32

Diethylene glycol 21.130

---1533

7086

---5028

32---

Diethylene glycol monoethyl ether 30 1296 86 4251 ---

Dimethyl siloxane(Dow Corning 200 fluid)

20 912.3 68 2992 ---

Diphenyl 100 1271 212 4169 ---

Diphenyl ether 30 1462 86 4795 ---

Ethanol 20 1156 68 3792 ---

Ethanol amide 25 1724 77 5655 ---

Ether (diethyl) 25 985 77 3231 ---

Ethyl acetate CH3COOC2H5 1520

---1133

5968

---3716

0.40.49

Ethyl alcohol 20 1161.8 68 3811 ---

Ethyl bromide C2H5Br 1020

932---

5068

3057---

---0.27

Ethyl glycol 30 1606 86 5268 ---

Ethyl iodide 20 876 68 2873 ---

Ethylene bromide 20 --- 68 --- 0.787

Ethylene chloride 20 --- 68 --- 0.668

Ethylene dibromide 24 1014 75 3326 ---

Ethylene dichloride 23 1240 73 4067 ---

Ethylene glycol 21.130

---1616

7086

---5300

17.8---

Ethylene glycol monoethyl ether 30 1279 86 4195 ---

Ethylene glycol monomethyl ether 30 1339 86 4392 ---

7088-8000

-124


Formaldehyde 25 1587 77 5205 ---

Formamide 25 1610 77 5281 ---

Formic acid10% ..................................................

2020

1299---

6868

4261---

---1.04

50% .................................................. 20 --- 68 --- 1.2

80% .................................................. 20 --- 68 --- 1.4

Conc................................................. 20 --- 68 --- 1.48

Freon-11 .................................................... 21.1 --- 70 --- 0.21

-12 .................................................... 21.1 --- 70 --- 0.27

-21 .................................................... 21.1 --- 70 --- 1.45

Fuel Oils1 ....................................................... 21.1

37.8------

70100

------

2.39 - 4.282.69

2 ....................................................... 21.137.8

------

70100

------

3.0 - 7.42.11 - 4.28

3 ....................................................... 21.137.8

------

70100

------

2.69 - 5.842.06 - 3.97

5A..................................................... 21.137.8

------

70100

------

7.4 - 26.44.91 - 13.7

5B..................................................... 21.137.8

------

70100

------

26.4-13.6 - 67.1

6 ....................................................... 5071.1

------

122160

------

97.4 - 66037.5 - 172

Gallium 50 2740 122 8987 ---

Gas oils 21.137.8

------

70100

------

13.97.4

Gasolinesa ....................................................... 15.6

37.8------

60100

------

0.880.71

b ....................................................... 15.6 --- 60 --- 0.64

c........................................................ 15.637.8

------

60100

------

0.460.40

7088-8000

-125


Glycerine100% ................................................

3020.337.8

1923------

8669

100

6307------

---648176

50% Water ....................................... 2060

------

68140

------

5.291.85cp

Glucose 37.865.6

------

100150

------

7.7M - 22M880 - 2420

Guaicol 100 1252 212 4107 ---

Helium -268.8 179.8 -452 590 ---

n-Heptane -17.822.437.8

---1150

---

072

100

---3772

---

0.928---

0.511

Heptene 30 1082 86 3549 ---

Heptyne 30 1159 86 3802 ---

Hexane 20 1203 68 3946 ---

n-Hexane -17.821.237.8

---1085

---

070

100

---3559

---

0.683---

0.401

Honey 37.8 --- 100 --- 73.6

Hydrogen -256 1187 -429 3893 ---

Industrial lubricantsTurbine oils

685...........................................SSU at 1000000F........................

15.693.3

------

60200

------

64714.5

420...........................................SSU .........................................

15.693.3

------

60200

------

36711

315...........................................SSU .........................................

15.693.3

------

60200

------

2598

215...........................................SSU .........................................

15.693.3

------

60200

------

1517.3

150...........................................SSU .........................................

15.693.3

------

60200

------

996

7088-8000

-126


Machine lubricants#8............................................. 37.8

54.4------

100130

------

23 - 3413 - 18

#10........................................... 37.854.4

------

100130

------

34 - 7218 - 25

#20........................................... 37.854.4

------

100130

------

72 - 8325 - 39

#30........................................... 37.854.4

------

100130

------

75 - 11939 - 55

Cutting oils#1............................................. 37.8

54.4------

100130

------

30 - 4017 - 23

#2............................................. 37.854.4

------

100130

------

40 - 4623 - 26

Indium 260 2215 500 7265 ---

Ink, printers 37.854.4

------

100130

------

550 - 2200238 - 660

Insulating oil 21.137.8

------

70100

------

24.1 max11.75 max

Kerosene 2025

---1315

6877

---4313

2.71---

Jet Fuel (av) -34.4 --- -30 --- 7.9

Lard 37.854.4

------

100130

------

62.134.3

Lard oil 37.854.4

------

100130

------

41 - 47.523.4 - 27.1

Lead 340 1760 644 5773 ----

Linseed oil 37.854.4

------

100130

------

30.518.94

Menhadden oil 37.854.4

------

100130

------

29.818.2

Menthol 50 1271 122 4169 ---

Merck 20.2 1482.3 68 4862 ---

Mercury 2021.137.8

1454------

6870

100

4769------

---0.118

0.11

Methanol 20 1118 68 3667---

Methyl acetate 2030

---1131

6886

---3710

0.44---

7088-8000

-127

LIQUID t0000C c(m/s) t0000F c(ft/s) cStMethyl alcohol 20 1121.2 68 3678 ---

Methyl bromide 2 905 36 2968 ---

Methyl iodide 2030

---815

68 ---2673

0.213---

Methylene bromide 24 971.2 --- 3186 ---

Methylene chloride 23.5 1064 74 3490 ---

Methylene iodide 24 977.7 75 3207 ---

Milk 20 --- 68 --- 1.13

MolassesA, first .............................................. 37.8

54.4------

100130

------

281 - 5070151 - 1760

B, second ......................................... 37.854.4

------

100130

------

1410 - 13.2M660 - 3.3M

C, blackstrap.................................... 37.854.4

------

100130

------

2630 - 55M1320 - 16.5M

Naphthalene 80 --- 176 --- 0.9

Naptha 25 1225 77 4018 ---

Neatsfoot oil 37.854.4

------

100130

------

49.727.5

Nitrobenzene 2023.8

---1462

6875

---4795

1.67---

Nitrogen -188.9 744.7 -308 2443 ---

Nonane 20 1248 68 4093 ---

l-Nonene 20 1218 68 3995 ---

Nonene-n -17.837.8

------

0100

------

1.7280.807

n-Octane -17.820

37.8

---1192

---

068

100

---3910

---

1.266---

0.645

Oil (lubricating) 10 1625 50 5330 ---

Oil of camphor 25 1390 77 4559 ---

Oleic acid 20 1442 68 4730 ---

Olive oil 21.737.854.4

1440------

71100130

4723------

---43.224.1

Oxygen -182.9 912 -297 2991 ---

Palm oil 37.8 --- 100 --- 47.8

7088-8000

-128

LIQUID t0000C c(m/s) t0000F c(ft/s) cSt54.4 --- 130 --- 26.4

Paraldehyde 28 1197 82 3926 ---

Peanut oil 37.854.4

------

100130

------

4223.4

l-Pentadecene 20 1351 68 4431 ---

Pentane 20 1008 68 3306 ---

iso-Pentane 25 985 77 3231 ---

n-Pentane -17.820

26.7

---1044

---

06880

---3424

---

0.508---

0.342

Petrolatum 54.471.1

------

130160

------

20.515

Petroleum ether 15.6 --- 60 --- 31(est)

Phenol 100 1274 212 4179 ---

Potassium 150 1840 302 6035 ---

n-Propanol 20 1220 68 4002 ---

Propionic acid 20 --- 68 --- 1.13

n-Propyl acetate 26 1182 79 3877 ---

n-Propyl alcohol 20 1223.2 68 4012 ---

Propylene glycol 21.1 --- 70 --- 52

Pyridine 20 1445 68 4740 ---

Quenching oil (typical) --- --- --- --- 100 - 120

Rapeseed oil 37.854.4

------

100130

------

54.131

Rosin oil 37.854.4

------

100130

------

324.7129.9

Rosin (wood) 37.893.3

------

100200

------

216 - 11M108 - 4400

Rubidium 160 1260 320 4133 ---

Sesame seed oil 37.854.4

------

100130

------

39.623

Silicon tetrachloride 30 766.2 86 2513 ---

Sodium 150 2500 302 8200 ---

7088-8000

-129


Sodium chloride (fused) 850 1991 1562 6530 ---

5%.................................................... 20 --- 68 --- 1.097

25% .................................................. 15.6 --- 60 --- 2.4

Sodium hydroxide (caustic soda)20% .................................................. 18.3 --- 65 --- 4.0

30% .................................................. 18.3 --- 65 --- 10.0

Soya bean oil 37.854.4

------

100130

------

35.419.64

Sperm oil 37.854.4

------

100130

------

21 - 2315.2

Sugar solutionsCorn syrup

86.4 Brix ................................. 37.882.2

------

100180

------

180Mcp1750cp

84.4 Brix ................................. 37.882.2

------

100180

------

48Mcp800cp

82.3 Brix ................................. 37.882.2

------

100180

------

17Mcp380cp

80.3 Brix ................................. 37.882.2

------

100180

------

6900cp230cp

78.4 Brix ................................. 37.882.2

------

100180

------

3200cp160cp

Sugar solutionsSucrose

60 Brix .................................... 21.137.8

------

70100

------

49.718.7

64 Brix .................................... 21.137.8

------

70100

------

95.231.6

68 Brix .................................... 21.137.8

------

70100

------

216.459.5

72 Brix .................................... 21.137.8

------

70100

------

595138.6

74 Brix .................................... 21.137.8

------

70100

------

1210238

76 Brix .................................... 21.137.8

------

70100

------

2200440

Sulphur 130 1332 266 4369 ---

7088-8000

-130


Sulphuric acid100% ................................................

20 --- 68 --- 14.6

95% .................................................. 20 --- 68 --- 14.5

60% .................................................. 20 --- 68 --- 4.4

Tar, coke oven 21.137.8

------

70100

------

600 - 1760141 - 308

Tar, gas house 21.137.8

------

70100

------

3300 - 66M440 - 4400

Tar, pine 37.855.6

------

100132

------

559108.2

Tar, road -RT-2................................................. 50

100------

122212

------

43.2 - 64.98.88 - 10.2

RT-4................................................. 50100

------

122212

------

86.6 - 15411.6 - 14.3

RT-6................................................. 50100

------

122212

------

216 - 44016.8 - 26.2

RT-8................................................. 50100

------

122212

------

660 - 176031.8 - 48.3

RT-10............................................... 50100

------

122212

------

4.4M - 13.2M53.7 - 86.6

RT-12............................................... 50100

------

122212

------

25M - 75M108 - 173

Tetralin 20 1484 68 4868 ---

Tin (molten) 240 2470 464 8102 ---

Toluene 2030

---1275

6886

---4182

0.68---

o-Toluidine 22.5 1669 73 5474 ---

l-Tridecene 20 1313 68 4307 ---

Trielhylene glycol 21.1 --- 70 --- 40

Triethylamine 0 1189 32 3900 ---

Turpentine 2537.854.4

1225------

77100130

4018------

---86.6 - 95.239.9 - 44.3

l-Undecene 20 1275 68 4182 ---

7088-8000

-131


Varnish, spar 2037.8

------

68100

------

313143

Waterdistilled ............................................ 20 1482.9 68 4864 1.0038

fresh ................................................. 15.654.4

------

60130

------

1.130.55

sea .................................................... --- --- --- --- 1.15

Water (sea)(surface, 3.5% salinity)

15 1507.4 59 4944 ---

Whale oil 37.854.4

------

100130

------

35 - 39.619.9 - 23.4

Xylene hexafluoride 25 879 77 2883 ---

o-Xylene 2022

---1352

6872

---4435

0.93---

Zinc 450 2700 842 8856 ---

7088-8000

-132

GLOSSARYThis appendix provides a glossary of terms that may be useful when using the DCT-7088.

Accuracy The ability of a flowmeter to produce an output within aspecific tolerance (in comparison to a known standard)which corresponds to its characteristic curve. Refer toLinearity.

Alarms Flow condition indicators which register on the optionalprinter. There are four separately programmable alarmsavailable on the DCT-7088 (Section 3.6.11).

Calibration The procedure which prepares an instrument to operatewithin its specifications.

Clean fluid A fluid with few suspended particles or bubbles, such asdistilled water, solvents, and fuels.

Damping The slowing of instantaneous signal changes to provide amore gradual or smoother response to the processmeasurement. Damping is configured by the user.

DCT The Digital Correlation Transit time series of Polysonicsflowmeters.

Dirty fluid A fluid containing suspended solids, contaminants,particles, or bubbles.

Flow profile Also called velocity profile. A side-view graphicalrepresentation of the distribution of flow velocities in apipe. Flow profile is comprised of the shape of the layersof individual local velocities inside a pipe. Factors thatdetermine the flow profile include the inertial and viscousforces of the fluid, inside pipe roughness, line restrictions,fittings, etc.

Full scale flow rate The highest flow rate that can be measured by theflowmeter with its current settings. The full scale flowrate is dependent upon the setting of the maximum flowrange and the pipe inside diameter (ID).

Ingress protection (IP) An international rating system for electrical equipmentenclosures. Indicates the degree of protection frompenetration of solid and liquid objects. The DCT-7088meets IP67, which allows brief total immersion with thelid closed to depths to 1 meter.

Inside roughness Roughness on the inside pipe wall or liner surface,expressed in feet.

7088-8000

-133

Linearity The ability of the flowmeter to establish a relationshipbetween actual flow and its output, often called thecharacteristic curve of the flowmeter, to approximate astraight line relationship.

Main Menu The Main Menu is a display which allows the user toscroll to various sub-menus (Section 3.3). The MainMenu can be accessed by pressing MENU twice.

Manual zero set calibration A zero set calibration method which applies a constantoffset entered by the user to all readings (Section 5.1.3).Refer to Zero set calibration.

Menus (Primary Displays,setup menus, diagnosticmenus, and printcommands)

The flowmeter uses Primary Displays, setup menus, anddiagnostic menus. Each of these has a unique two digitmenu address. Menus can be accessed using the numerickeypad (Section 3.2) or the cursor (Section 3.3). Inaddition, certain data may be printed using a two digitprint command.

Primary Displays are for viewing only and are notconfigurable (Section 3.6.1).

Setup menus are used primarily to enter configurationdata or to view the flowmeter’s current configurationsettings (Section 3.6.2 through 3.6.12).

Diagnostic menus are for viewing various diagnosticparameters and are not configurable (Section 3.6.13).

Certain print commands are available by pressing MENUplus 97, 98, or 99 (Section 3.6.14).

Minimum velocity The lowest speed at which liquid can travel and still beaccurately measured.

National ElectricalManufacturersAssociation (NEMA)

North American standards agency that rates instrumentenclosures according to their application. The DCT-7088meets NEMA-6.

Newtonian andnon-Newtonian liquids

A Newtonian liquid is one which has a linear relationshipbetween the applied shear stress and the rate of liquiddeformation (applies to most liquids in mostapplications). Therefore, it is a liquid which has aconstant viscosity at a given temperature that is notaffected by the rate of shear.

A non-Newtonian liquid is one which has a non-linearrelationship between the applied shear stress and the rateof liquid deformation. Some colloidal suspensions andcertain other liquid/solids mixtures are non-Newtonian.

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Noise Any signals received by the flowmeter other than thetransmitted signal.

Positive zero The feature on Polysonics meters which inhibitsbackflow indication or volume accumulation under zeroflow conditions. Setting the low flow or low signalcutoffs to appropriate values can accomplish this.

Repeatability The ability of a flowmeter to reproduce a measurementeach time a given flow rate is repeated.

Reynolds number A dimensionless number which represents the flow of aliquid as being laminar, transitional, or turbulent. TheReynolds number is determined by velocity, kinematicviscosity, and the area through which the fluid is moving.The Reynolds number (in combination with the piperoughness and proximity to elbows or other obstructions)determines the flow profile. The flowmeter automaticallycorrects for these Reynolds number-induced variations inthe profile. Refer to Flow profile.

Scale factor Provides a means for the user to adjust the instrumentoutput (Section 5.2). The flow measured by theinstrument is multiplied by this number.

Signal-to-noise-ratio The proportion of desired ultrasonic signal versus otherunwanted signals (noise).

Slurry A mixtures of a liquid with any insoluble material such asclay, cement, coal, etc., usually described in terms ofpercent solids content.

Sonic discontinuity A region which reflects or scatters sound, typically solidparticles or gas bubbles.

Sound speed (soundvelocity)

The speed of propagation of a compressional or shearwave through a specified material.

Sub-menu A group of related menus. The sub-menus are listed onthe Main Menu. Refer to Section 3.3.

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Totalizer A feature of the flowmeter that accumulates the totalvolume of fluid that flows past the transducers. Theflowmeter has a positive totalizer, a negative totalizer,and a net totalizer.

The positive totalizer accumulates the total volumetricflow in the positive (upstream) direction.

The negative totalizer accumulates the total volumetricflow in the negative (downstream) direction.

The net totalizer accumulates the total volumetric flow inthe positive direction minus the total volumetric flow inthe negative direction. (For example, if there are 3000gallons of flow in the positive direction and 1000 gallonsof flow in the negative direction, the net totalizerindicates 2000 gallons of net flow.)

Totalizer multiplier The number by which the flow total is to be multipliedfor display purposes. The multiplier is a multiple of 10which is selected by the user in Menu 37.

Transducer mounting The mounting method to be used for installing thetransducer (Section 4.4). Refer to V method, Z method,and W method.

Transducer spacing The distance between the inside edges of the transducers(the edges opposite the transducer cable connection.)

Transit time In flow measurement, the time period for a sound wave totravel from one transducer to the other.

V method Installation method in which the transducers are mountedon the same side of the pipe and the ultrasonic signalmakes two transits of the pipe per pass (Section 4.4.1).

Velocity profile Refer to Flow profile.

W method Transducer installation method used on small metallicpipes. In the W method, the transducers are mounted onthe same side of the pipe and the ultrasonic signal makesfour transits of the pipe per pass (Section 4.4.2).

Z method Installation method in which the transducers are mountedon opposite sides of the pipe and the ultrasonic signalmakes one transit per pass (Section 4.4.3).

Zero flow set calibration A zero set calibration method that is used only when theflow in the pipe can be stopped (Section 5.1.2). Itautomatically applies a zero point. Refer to Zero pointand Zero set calibration.

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Zero point The amount of offset applied to all flow rates to enablethe flowmeter to read zero. All flow below this point isconsidered negative flow.

Zero set calibration A small adjustment to the zero point which may berequired to maximize accuracy at low flow rates(Section 5.1). The two zero set calibration methods arethe zero flow set method and the manual zero set method.Refer to Zero flow set calibration and Manual zero setcalibration.

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CONFIGURING THE DCT SERIESFLOWMETER WITH TimeGATE ™

After the DCT series flowmeter has been installed, it is ready to be configured and placedin operation. The flowmeter can be configured with an IBM-compatible PC andTimeGATE™, a Windows95®-based configuration and graphical signal analysis utility. Theconfiguration settings are stored in the flowmeter’s non-volatile memory to protect them inthe event of power failure. Once the flowmeter has been configured, the transducers can bespaced and installed on the pipe (Chapter 4). Flow can be monitored on a PC, on theflowmeter’s display (if provided), or through a remote device connected to the current loopoutput.

IMPORTANT: In order to access all of the features described here, TimeGATE™ must beversion 3.0 or higher and the DCT series flowmeter must have hardwareversion 3.0 or higher. If connected to flowmeters with hardware versionsearlier than 3.0, TimeGATE™ version 1.0 must be used, which onlysupports the graphic analysis function (Section F.5) and not theconfiguration function. For these earlier hardware versions, configurationand other functions must be performed directly on the instrument’s keypad.

F.1 The TimeGATE ™ EnvironmentThis section defines terminology used in TimeGATE™ and describes rules for makingselections with a mouse or keyboard. The operator can use which ever mix of mouse orkeyboard commands is most comfortable.

F.1.1 DEFINITIONS

The following terminology is used in the TimeGATE™ configuration procedures:

Mouse Functions

Pointing Indicating a desired selection on the screen with the cursor by movingthe mouse.

Clicking Pressing the left mouse button once and releasing it after pointing to aselected item.

Double-clicking Quickly pressing the left mouse button twice and releasing it afterpointing to a selected item.

Dragging Moving an object (for example, the slide bar in the current loopcalibration function) by completing the following steps:

1. Pointing to the object

2. Pressing and holding down the left mouse button

3. Moving the mouse to a new position

4. Releasing the mouse button

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Tabs, Option Groups, Lists, and Menus

Tab The “folder tab” heading on the screen (Figure F-1) that displays agroup of related functions (for example, the CONFIGURATION tab).The configuration parameters for the flowmeter are located on thesetabs. Only one tab can be accessed at a time by clicking on the tab’stitle.

Figure F-1 Tabs

Option group A set of related options grouped together in a box on theCONFIGURATION tab (for example, the PIPE option group)[Figure F-2].

Figure F-2 Option Group

Options Column A column located on the left of the CONFIGURATION tab containinga list of the option groups (Figure F-3).

Figure F-3 Options Column

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Pull-down list A list of additional selections for an option. If a pull-down list isavailable, it can be displayed by clicking on the down arrow to theright of the current selection (Figure F-4).

Figure F-4 Pull-Down List

Pull-down menus The FILE, EDIT, COMMUNICATIONS, and HELP options displayedat the top of the screen. Clicking on one of these menus displays apull-down list of available functions.

Boxes and Buttons

Check box A small box to the left of an option that allows the option to beselected (checked) or cleared (unchecked) by clicking on the box(Figure F-5).

Figure F-5 Check Box

Text box A box which allows characters or numbers to be entered from thekeyboard (Figure F-6).

Figure F-6 Text Box

Command button A rectangular button that can be clicked on to carry out an action(Figure F-7).

Figure F-7 Command Button

Radio button Small circular button identifying an individual selection in a group(Figure F-8). Only one radio button can be selected per group.

Figure F-8 Radio Buttons

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F.1.2 MOUSE OPERATION

Follow these guidelines when using a mouse in TimeGATE™:

! Use the left mouse button for most standard mouse operations.

! To select an item, click on it.

! To select an item from a pull-down list, first open the list by clicking on the downarrow located to the right of the list. Next, select an item from the list by clicking on theitem.

! To check or uncheck a check box, click on it.

! To select an item from a radio button group, click on it.

F.1.3 KEYBOARD OPERATION

Follow these guidelines when using a keyboard in TimeGATE™:

! One screen element (such as a folder tab, text box, or command button) is alwayshighlighted to indicate that it can be currently accessed by the keyboard.

! To move from one screen element to the next, press the TAB key.

! To move from one folder tab to the next folder tab, press and hold down theCONTROL key while pressing the TAB key.

! To activate a command button when it is highlighted, press the ENTER key.

! To select an item from a pull-down list, tab to the list then press the UP and DOWNARROW keys.

! To select or clear a check box, tab to it and press the spacebar.

! To select an item from a radio button group, tab to the first button and press the UP andDOWN ARROW keys.

F.2 Installing TimeGATE ™

To install TimeGATE™:

1. Insert the TimeGATE™ diskette into the diskette drive of the PC.

2. Click on the START command button on the Desktop Screen.

3. Click on the RUN option.

4. Enter A:\SETUP and press ENTER.

NOTE: If the TimeGATE™ program is in a location other than drive A, alter theSETUP command accordingly. For example, if the diskette is in drive B, enterB:\SETUP.

5. Follow the on-screen instructions during the installation process. (The default optionsare recommended for most installations.)

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F.3 Running TimeGATE ™

After installing TimeGATE™ (Section F.2), the program can be run as follows:

1. Open the door of the flowmeter and connect a null modem cable from the com port ofthe flowmeter to the com port of the PC.

2. Ensure that power has been applied to the flowmeter.

3. If connecting TimeGATE™ to a DCT6088 or DCT7088, ensure that the TIMEGATEselection in Menu 46 is active. To activate the TIMEGATE selection:

! Access Menu 46.

! Select TIMEGATE on the flowmeter display.

! Access Menu 00.

4. Run TimeGATE™.

NOTE: If the default options were chosen during installation, TimeGATE™ can be runby double-clicking the TimeGATE™ icon on the Desktop Screen.

The TimeGATE™ Welcome Screen is displayed, followed by the Connecting Screen(Figure F-9):

Figure F-9 Connecting Screen

Communications are established after several seconds, then Configuration Screen 1 isdisplayed (Figure F-10).

NOTE: If the units do not communicate, refer to Section F.6.

The flowmeter can now be configured (Section F.4) and flow data can be observed(Section F.5). After the TimeGATE™ session is completed, the program can beterminated by selecting EXIT from the FILE pull-down menu.

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F.4 Configuring the FlowmeterThe setup options are located on the CONFIGURATION tab in four separate screens. A listof the option groups contained in the screens is displayed in the Options Column on theleft. By clicking on an option group in the column, the appropriate configuration screen isdisplayed (Figures F-10 through F-13).

NOTE: Refer to Section F.6 for information on configuring the RS232 settings.

Figure F-10 Configuration Screen 1

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General Configuration Procedures

Follow these general steps when configuring the flowmeter:

1. Go to the CONFIGURATION tab.

2. Follow the step by step procedure in Sections F.4.1 through F.4.11 to set theparameters for each option (for example, PIPE, TRANSDUCER, and FLOW).

NOTE 1: Measurement units (English versus metric) may be selected in the Pipe OD Setup.

NOTE 2: If a value of less than 1 is entered, it must be preceded by a 0 (zero). Forexample, if entering a pipe wall thickness of .5 inches, the number must beentered as 0.5.

NOTE 3: If an option or a text box is dimmed out (greyed out), it is currently not availableor contains view-only information which cannot be edited for the currentparameters.

3. After entering all parameters, apply the settings to the flowmeter by pressing the SENDcommand button (Figure F.14).

Figure F-14 Receive and Send Command Buttons

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4. Click on the GRAPH tab (Section F.5) to view the flow, velocity, signal strength, andtotalized flow values. (It takes several seconds for the full effects of the newconfiguration to be applied to the flow data.)

5. Save the configuration data to a file for future retrieval by selecting SAVE AS from theFILE pull-down menu and typing in a file name.

If the flowmeter and transducers were properly installed and a steady flow is present,the flow and signal strength readings should be relatively stable. The signal strengthreading should typically be a minimum of 2%.

Sending, Receiving, and Saving Data

Configuration data is stored in the flowmeter’s non-volatile memory. This data is retrievedautomatically whenever the flowmeter first connects with TimeGATE™ or whenever theRECEIVE command button in the CONFIGURATION tab is clicked (Figure F-14). Thisallows the current configuration in the flowmeter to be reviewed and edited as required.New configuration data is sent to the flowmeter by clicking on the SEND command button.

In addition, configuration data can be saved to a file for future use by selecting SAVE ASfrom the FILE pull-down menu. (The default file extension for TimeGATE™ files is .DCT).This feature may prove helpful when reconfiguring a flowmeter for routine changes in theapplication or when configuring multiple flowmeters with identical parameters.

Changes can be saved to an existing file by selecting SAVE from the FILE menu. A savedfile can be run in a future session of TimeGATE™ by selecting OPEN from the FILE menuand selecting the desired file. The saved parameters set can then be downloaded to theflowmeter using the SEND button.

NOTE: By selecting EXPORT from the FILE pull-down menu, a file can be exported as acomma delimited file for viewing the graph data in a spreadsheet.

F.4.1 PIPE OPTION GROUP

The PIPE option group is accessed by clicking on PIPE in the Options Column. This groupcontains the options related to the pipe including pipe dimensions and pipe material.

Pipe Outside Diameter (OD)

To set the Pipe OD:

1. From the PIPE options group, click on the PIPE OD text box

2. Enter the pipe OD.

IMPORTANT: Actual (not nominal) dimensions must be entered. Precision isimportant since accuracy is directly affected by the square of any errorin the pipe dimensions. Pipe schedules and classes are provided inAppendix B for reference.

3. Click on the down arrow to the right of the adjacent text box.

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The pull-down list for the pipe OD measurement units is displayed, which includes:

! INCHES

! MM (millimeters)

4. Click on the desired measurement unit.

IMPORTANT: Selecting the measurement unit INCHES or MM for pipe ODautomatically selects English versus metric units for the following:

! Pipe OD

! Pipe wall thickness

! Liner thickness

! Transducer spacing

! Sound speeds for pipe, liner, and fluid

Pipe Wall Thickness

To set the pipe wall thickness:

1. From the PIPE options group, click on the WALL THICKNESS text box.

2. Enter the pipe wall thickness.

Pipe Material

To select the pipe material:

1. From the PIPE options group, click on the down arrow to the right of the MATERIALStext box.

The following selections are displayed:

! CARBON STEEL

! STAINLESS STEEL

! CAST IRON

! DUCTILE IRON

! COPPER

! PVC

! PVDF LOW DENSITY

! PVDF HI DENSITY

! ALUMINUM

! ASBESTOS

! FIBERGLASS-EPOXY

! OTHER

2. Click on the desired selection.

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IMPORTANT: The selection OTHER denotes any material not listed. If OTHER isselected, the pipe sound speed and pipe inside roughness must be entered.

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Pipe Sound Speed

Pipe sound speed is configurable only if OTHER was selected as the pipe material. IfOTHER was not selected, the pipe sound speed is available for viewing only.

To set the pipe sound speed:

1. From the PIPE options group, click on the SOUND SPEED text box.

2. Enter the pipe sound speed.

Pipe Inside Roughness

Pipe inside roughness is configurable only if OTHER was selected as the pipe material.Data on this parameter is available from the Cameron Hydraulic Data Book published byIngersoll-Rand. If OTHER was not selected, the pipe inside roughness is available forviewing only.

1. From the PIPE options group, click on the ROUGHNESS text box.

2. Enter the pipe roughness.

NOTE: The number entered for pipe roughness is not important on lined pipes. In thiscase, the liner inside roughness should be entered (Section F.4.2)

F.4.2 LINER OPTION GROUP

The LINER option group is accessed by clicking on LINER in the Options Column. Thisgroup contains the options related to the liner including liner material and liner thickness.

Liner Thickness

To set the liner thickness:

1. From the LINER options group, click on the THICKNESS text box.

2. Enter the liner thickness.

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Liner Material

To select the liner material:

1. From the LINER options group, click on the down arrow to the right of the MATERIALtext box.


! NONE (no liner)

! TAR EPOXY

! RUBBER

! MORTAR

! POLYPROPYLENE

! POLYSTYROL

! POLYSTYRENE

! POLYESTER

! POLYETHYLENE

! EBONITE

! TEFLON

! OTHER


IMPORTANT: The selection OTHER denotes any material not listed. If OTHER isselected, the liner sound speed and liner inside roughness must be entered.

Liner Sound Speed

Liner sound speed is configurable only if OTHER was selected as the liner material. IfOTHER was not selected, the liner sound speed is available for viewing only.

To set the liner sound speed:

1. From the LINER options group, click on the SOUND SPEED text box.

2. Enter the liner sound speed.

Liner Inside Roughness

Liner inside roughness is configurable only if OTHER was selected as the liner material.Data on this parameter is available from the Cameron Hydraulic Data Book published byIngersoll-Rand. If OTHER was not selected, the liner inside roughness is available forviewing only.

1. From the LINER options group, click on the ROUGHNESS text box.

2. Enter the liner roughness.

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F.4.3 FLUID OPTION GROUP

The FLUID option group is accessed by clicking on FLUID in the Options Column. Thisgroup contains the options related to the fluid.

Fluid Type

To select the fluid type:

1. From the FLUID options group, click on the down arrow to the right of the TYPE textbox.


! WATER

! SEA WATER

! KEROSENE

! GASOLINE

! FUEL OIL #2

! CRUDE OIL

! PROPANE (-45°C)

! BUTANE (0°C)

! OTHER


IMPORTANT: The selection OTHER denotes a fluid type not listed. If OTHER is selected,the fluid sound speed and fluid viscosity must be entered for this fluid type.

Fluid Sound Speed

Fluid sound speed is configurable only if OTHER was selected as the fluid type. If OTHERwas not selected, the fluid sound speed is available for viewing only.

To set the fluid sound speed:

1. From the FLUID options group, click on the SOUND SPEED text box.

2. Enter the fluid sound speed.

NOTE: Refer to Appendices C and D for information on fluid sound speeds.

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Fluid Viscosity

Fluid viscosity is configurable only if OTHER was selected as the fluid type. If OTHERwas not selected, the fluid viscosity is available for viewing only.

To set the fluid viscosity:

1. From the FLUID options group, click on the VISCOSITY text box.

2. Enter the kinematic viscosity of the fluid.

NOTE: Refer to Appendices C and D for information on fluid viscosities.

F.4.4 TRANSDUCER OPTION GROUP

The TRANSDUCER option group is accessed by clicking on TRANSDUCER in theOptions Column. This group contains the options related to the transducer, includingselection of the transducer type, transducer mounting method, and spacing requirements.

Transducer Type

The flowmeter must be configured for the correct transducer arrangement – either with orwithout the optional high-temperature blocks (Section 4.5).

To select the transducer type:

1. From the TRANSDUCER options group, click on the down arrow to the right of theTYPE text box.


! STANDARD

! HI TEMPERATURE

2. Click on the desired transducer type.

NOTE: STANDARD should be selected unless the optional high-temperature blocksare used.

Transducer Mounting

The transducer can be mounted with the V, W or Z method (Section 4.4).

To select the transducer mounting method:

From the TRANSDUCER options group, click on the down arrow to the right of theMOUNT text box.


! V

! W

! Z

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Transducer Spacing

Based on the setup parameters, TimeGATE™ automatically calculates the requiredtransducer spacing. The spacing parameter is displayed in the SPACING text box. Thisvalue is for display only and is not editable. Refer to Section 4.2 for more information ontransducer spacing.

F.4.5 CALIBRATION OPTION GROUP

The CALIBRATION option group is accessed by clicking on CALIBRATION in the OptionsColumn. To assure accurate flow measurement, the instrument should be properlycalibrated. The calibration methods available are:

! Zero set calibration

! Scale factor calibration

These calibration methods must be performed for the particular pipe that is to be metered.Table F-1 provides guidelines for selecting a calibration method:

Table F-1Selecting the Calibration Method

Calibration Method Function Application

Zero set calibration

!Zero flow set

!Manual zero set

Zeros the instrument for anactual no flow condition

Applies a manually entered offsetto all flow readings

Installations where flow can bestopped

Where an offset is required

Scale Factor Compensates for manufacturingvariations in the transducers

Set by the factory to the valueimprinted on the transducers

NOTE: The 4 to 20 milliampere (4 to 20 mA) current loop can also be calibrated forapplications using a current loop. Refer to Section F.4.8 for more information.

Zero Set Calibration

Once the instrument is operating on the actual pipe to be metered, a small adjustment to thezero point, or zero set calibration, may be required to maximize accuracy at low flow rates.Zero set calibration allows the flowmeter to read very close to zero under zero flowconditions.

There are two zero set calibration methods available: the zero flow set method and themanual zero set method. The zero point used by the flowmeter in either of these methods isdisplayed in a text box to the right of the ZERO FLOW command button.

NOTE: After the instrument has been properly zeroed, it should display a stable readingwell below 0.05 feet per second (0.015 meters per second) under zero flowconditions with the low flow cutoff disabled.

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Preliminary Steps

Before performing a zero set (zero flow set or manual zero set) calibration, follow thesepreliminary steps:

1. Ensure that the transducers are connected to the pipe during the zero set calibrationprocedure.

2. Ensure that the instrument is reading flow. The instrument must have successfullycompleted its internal configuration process as indicated by the presence of a flowreading on the Graph screen (Section F.5).

3. Disable the low flow cutoff to allow the zeroing operation to be verified. (To disablethe low flow cutoff, set the low flow cutoff value to zero.)

Zero Flow Set Method

The best method of zeroing the instrument is to stop the flow and perform a zero flow set.on the pipe. The purpose of the zero flow set is to zero the instrument for the individualinstallation. This method is used only when the flow in the pipe can be stopped.

To zero the instrument with the zero flow set method:

1. Follow the procedures outlined in Preliminary Steps, above.

2. Ensure that there is no flow in the pipe.

3. From the CALIBRATION options group, click on the ZERO FLOW command button(Figure F.15).

Figure F-15 Zero Flow Button

If the flow rate is higher than recommended for performing a zero flow set calibration,an error message is displayed. For example (Figure F-16):

Figure F-16 Zero Flow Set Error Message (example)

4. If the error message is displayed, the following is recommended:

! Cancel the zero flow calibration by clicking on the NO button.

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! Repeat steps 1 through 3 when the flow rate is within recommended limits. Flowshould be greater than -.25 and less than +.25 feet per second (-0.076 and +0.076meters per second), as displayed on the GRAPH screen.

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Manual Zero Set Method

The zero point can be manually entered with the manual zero set method. This methodshould be used infrequently. Manual zero set applies a constant offset entered by the userto all readings.

Table F-2 illustrates an example of a manual zero offset of 10 gallons per minute:

Table F-2Example of Manual Zero Offset

Uncalibrated Flow Reading(before manual zero offset)

Manual Zero Offset Calibrated Flow Reading(after manual zero offset)

250 GPM 10 GPM 240 GPM

To zero the instrument with the manual zero set method:

1. Follow the procedures outlined in Preliminary Steps, above.

2. Minimize the flow occurring in the pipe.

3. From the FLOW options group (Section F.4.6), ensure that the minimum flow rangesetting is the negative equivalent of the maximum flow rate setting. (For example, if themaximum flow range setting is 100 gallons per minute, ensure that the minimum flowrange setting is -100 gallons per minute.)

4. From the FLOW options group, set the damping so that the flowmeter reads a steadyflow.

5. From the CALIBRATION options group, enter 0 (zero) in the text box to the right of theZERO FLOW button.

6. Click on the SEND button to send the data to the flowmeter.

7. Allow the flowmeter to settle for ten minutes.

8. Take ten separate flow readings and determine their average.

This average is designated as the variable P (for positive).

9. Disconnect the transducer wiring connections at the flowmeter and swap the upstreamwires with the downstream wires.

The flowmeter should begin to display a negative flow reading.

10. Allow the flowmeter to settle for ten minutes.

11. Take another ten flow readings and determine their average.

This new value is designated as the variable N (for negative).

12. Determine the manual zero point (Zp) by calculating the following formula:

Zp = (P+N) 2

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13. Enter the value of the zero point as determined in step 12 in the text box to the right ofthe ZERO FLOW button.

NOTE: A negative offset may be entered by first typing a minus sign.

14. Click on the SEND button again to resend the data to the flowmeter.

15. Reconnect the transducer wires according to their original orientation.

16. Restore the minimum and maximum flow range values if they were changed.

17. Allow the flowmeter readings to settle for ten minutes.

The flowmeter is now calibrated with the manual zero set method.

Scale Factor Calibration

After the instrument’s zero point has been set and verified, a scale factor can be set toadjust the measured flow. The flow measured by the instrument is multiplied by this scalefactor. (For example, if the displayed flow is twice the actual flow, a scale factor of 0.5divides the displayed flow by 2. If the displayed flow is one-half of the actual flow, a scalefactor of 2 doubles the displayed flow.)

The primary reason for setting the scale factor is to compensate the instrument formanufacturing variations in the transducers. The scale factor is preset at the factory and isimprinted on the transducers. If an additional scale factor is required by the user, theadditional scale factor should be multiplied by the factory scale factor and the result shouldbe entered in the SCALE FACTOR text box.

Observe the following precautions when setting the scale factor:

! Always determine the scale factor at the highest possible flow rate achievable in orderto maximize the accuracy of the scale factor.

! Use only the factory preset scale factor as marked on the transducers in the followingsituations:

- The flow cannot be stopped to verify or set the zero point

- A reasonably high flow rate cannot be achieved

- An accurate secondary flow standard is not available

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F.4.6 FLOW OPTION GROUP

The FLOW option group is accessed by clicking on FLOW in the Options Column. Thisgroup contains the options related to flow, including flow units, damping, and cutoffs (lowsignal and low flow).

Flow Units

Both the volumetric units and the associated time rate (per) units are selectable for flow.

To select the flow units:

1. From the FLOW options group, click on the down arrow to the right of the first UNITStext box.

The following units are displayed:

! GALLONS

! LITERS


! CUBIC FT

! CUBIC METERS

! ACRE FT

! OIL BARRELS

! LIQUOR BARRELS

! FEET

! METERS

2. Click on the desired volumetric unit.

3. Click on the down arrow to the right of the second UNITS text box.

The following time rate units are displayed:

! SEC

! MIN

! HOUR

! DAY

4. Click on the desired time rate unit.

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Minimum and Maximum Flow Range Values

The minimum and maximum values can be set for the volumetric flow range. Setting theoptimum flow range generally improves the flowmeter’s response time.

NOTE: Whenever the pipe ID is changed, the flowmeter returns the volumetric flowrange to its default settings. The default settings are the minimum and maximumflows for the new pipe ID that occur at +32 and -32 FPS (+9.76 and -9.76 MPS).

To set the minimum and maximum values for the flow range:

1. From the FLOW options group, click on the MIN FLOW text box.

2. Enter the minimum value for the flow range.

3. Click on the MAX FLOW text box.

4. Enter the maximum value for the flow range.

Damping

The damping coefficient suppresses short term fluctuations in the indicated flow rate. Thedisplayed flow rate and the 4 to 20 mA current loop output is a moving average of the lastn seconds where n is the damping value. Increasing the coefficient increases the responsetime to changes. The coefficient is adjustable from 1 to 99 seconds in 1-second increments.Damping should be kept at a minimum unless the velocity fluctuates wildly. If so, dampingshould be increased just enough to reduce the fluctuation to an acceptable degree.

To set the damping:

1. From the FLOW options group, click on the DAMPING text box.

2. Enter the damping value.

Cutoffs

The flowmeter can be configured with a low signal cutoff or a low flow (low velocity)cutoff. The cutoff function which is selected (low flow, low signal, or both) and theaccompanying cutoff value should be based on the specifics of the application.Experimentation is recommended for achieving optimum results.

Low Flow Cutoff

When a zero flow condition occurs (for example, as the result of a pump being shut off),internal sloshing, check valve leakage, and other fluid movement can prevent theflowmeter from reading total zero. This phenomenon can result in totalizer errors. Theseerrors can be minimized by entering a low flow cutoff (a minimum acceptable value forflow). Setting a low flow cutoff drives the flowmeter to zero for flow rates at or below thatvalue. If the flow rate (regardless of direction) falls below the low flow cutoff value, theinstrument’s indicated flow is driven to zero and the totalizers stop incrementing.

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For example, if a low flow cutoff of 0.1 feet per second (.03 meters per second) is entered,the instrument would be driven to zero for flow rates less than 0.1 foot per second in thepositive direction and greater than -0.1 foot in the negative direction (Figure F-17).

-0.3 -0.2 -0.1 0 +0.1 +0.2 +0.3

Zero flow displayed here

Figure F-17 Low Flow Cutoff (example)

To set the low flow cutoff:

1. From the FLOW options group, click on the LOW FLOW CUTOFF text box.

2. Enter the value for the low flow cutoff.

NOTE: The value for the low flow cutoff should be set as high as is practical tomaximize the stability of the zero flow setting.

Low Signal Cutoff

Empty pipes or solids, bubbles, or voids in the flow stream may cause temporary drops insignal strength and erroneous readings. The effect of these dropouts can be minimized bysetting a low signal cutoff. Setting a low signal cutoff (a minimum acceptable signalamplitude), drives the flowmeter to the loss-of-signal (LOS) condition. The flowmeter’sresponse to the LOS condition may be programmed as follows:

! Drop the reading to zero

! Hold the last valid reading (but continue to totalize)

In addition to these two options, a relay can be actuated based on the low signal cutoff(Section F.4.9).

To set the low signal cutoff:

1. From the FLOW options group, click on the LOW SIGNAL CUTOFF text box.

2. Enter the value for the low signal cutoff.

NOTE: The value for the low signal cutoff should typically be set at approximatelyone-half of the value of the signal strength present under flow conditions.Note that signal strength is typically not significantly affected by flow rate.

3. Click on one of the following radio buttons:

! ZERO (to drop the reading to zero during an LOS condition)

! HOLD (to hold the last valid reading during an LOS condition)

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F.4.7 TOTALIZER OPTION GROUP

The TOTALIZER option group is accessed by clicking on TOTALIZER in the OptionsColumn. This group contains the options related to the totalizers, including selecting thetotalizer units and the totalizer multiplier.

There are three totalizers available:

! Positive totalizer

! Negative totalizer

! Net totalizer

The positive totalizer tracks the flow moving in the positive direction (from the upstreamtransducer to the downstream transducer). It is not affected by flow in the opposite(downstream) direction.

The negative totalizer tracks the flow moving in the negative direction (from thedownstream transducer to the upstream transducer). It is not affected by flow in theopposite (upstream) direction.

The net totalizer provides the difference between the positive and negative flow values. Forexample, if there are 1000 gallons of flow in the negative direction and 3000 gallons offlow in the positive direction, the net totalizer indicates 2000 gallons of net flow.

Enable Totalizers

Any combination of totalizers may be enabled or disabled. If a totalizer is merely disabled,it stops totalizing but is not reset to zero.

NOTE: The totalizers can be reset by clicking on the RESET button in the GRAPH tab(Section F.5) and clicking the appropriate check boxes.

To enable the totalizers, click on one or more of the following check boxes in theTOTALIZER options group:

! NET (net totalizer)

! POS (positive totalizer)

! NEG (negative totalizer)

Check marks indicate which totalizers are enabled.

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Totalizer Units

The totalizer unit which is selected can be different from the flow rate unit. For example, ifthe flow rate is measured in gallons per minute, the totalizer can be measured in millions ofgallons.

To select the totalizer unit:

1. From the TOTALIZER options group, click on the down arrow to the right of the UNITStext box.


! GALLONS

! LITERS


! CUBIC FT

! CUBIC METERS

! ACRE FT

! OIL BARRELS

! LIQUOR BARRELS

2. Click on the desired totalizer unit.

Totalizer Multiplier

The totalizer value can be displayed with one of several multiplier values. For example,700 liters can be displayed as 700 “single liters” (if the multiplier value is X1) or7 “hundreds of liters” (if the multiplier value is X100).

NOTE: The totalizer reading on the flowmeter display is followed by a slash symbol / (a“per” symbol) if a totalizer multiplier other than 1 is selected. For example, atotalizer value of 2500 cubic meters with a totalizer multiplier of x100 would bedisplayed as: 25 M3/ .

To select the totalizer multiplier:

1. From the TOTALIZER options group, click on the down arrow to the right of theMULTIPLIER text box.


! X 0.01

! X 0.1

! X 1

! X 10

! X 100

! X 1000

! X 10000

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2. Click on the desired totalizer multiplier.

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F.4.8 4-20 mA CURRENT LOOP OPTION GROUP

The 4-20 mA option group is accessed by clicking on 4-20 mA in the Options Column.This group contains the options for calibrating and testing the current loop and setting thecurrent loop span. The present value of the current loop output is displayed in milliamperesabove the test/calibration slide bar.

NOTE: Refer to the following sections for more information on the current loop:

! Section 2.4.5 - connecting wiring to the current loop module

! Section 2.6.1 - replacing the current loop module

! Section 2.6.2 - selecting the current loop powering option

IMPORTANT: The current loop and relay functions on the DCT1088 are mutuallyexclusive. Only one of these functions can be enabled at a time. Whencalibrating, testing, or operating the current loop on a DCT1088, the relayfunction must be disabled. (The relay mode selection must be OFF.)

Calibrating and Testing the Current Loop

The 4 to 20 mA current loop can be calibrated. In addition, the calibration of the currentloop and/or the devices connected to it can be tested. The current loop is factory calibratedand should not require field calibration prior to initial use. However, if calibration andtesting should become necessary, complete the following steps:

1. From the 4-20 mA options group, click on the 4-20 mA check box to enable the currentloop function.

2. Click on the TEST/CALIBRATION check box.

3. Click on the CALIBRATE command button.

The first Current Loop Calibration screen (Step 1 of 5) is displayed (Figure F-18):

Figure F-18 Current Loop Calibration Screen (Step 1 of 5)

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4. Connect an ammeter to the input (IN) and output (OUT) terminals of the current loopmodule and turn on the ammeter.

5. Click on the NEXT> command button.

The next Current Loop Calibration screen (Step 2 of 5) is displayed.

6. To perform a coarse calibration of the 4 mA (minimum) set point, enter the exact valueof the current loop output that is presently displayed on the ammeter.


The next Current Loop Calibration screen (Step 3 of 5) is displayed.

8. To perform a coarse calibration of the 20 mA (full scale) set point, enter the exact valueof the current loop output that is presently displayed on the ammeter.


TimeGATE™ now performs a coarse calibration of the 4 mA and 20 mA set points. Thefollowing Current Loop Calibration screen (Step 4 of 5) is displayed to allow a finecalibration (Figure F-19):


10. Click on the 4 mA radio button:

After the current loop output stabilizes, the ammeter should now read exactly 4.00 mA.If not, the 4 mA set point should be finely adjusted.

11. If fine adjustment is not required, skip this step. If fine adjustment is required, click onthe up arrow button to increase the value of the output or the down arrow button todecrease the value. (Every two clicks on a button adjusts the calibration byapproximately .01 mA.)

12. Adjust the calibration of the 20 mA set point in a manner similar to adjusting the 4 mAset point (steps 10 through 11).


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The last Current Loop Calibration screen (Step 5 of 5) is displayed (Figure F-20):


The current loop can be tested by changing the output of the flowmeter and comparingit to the reading on the ammeter. A slide bar is displayed that represents the 4 to 20 mArange. The slide bar is scaled in increments of 1 mA, with 4 mA represented on the farleft and 20 mA on the far right. The present output is indicated by a pointer on the barwith the corresponding numeric value displayed above the bar.

14. To test the accuracy of the current loop, click on the slide bar pointer.

15. Drag the pointer to each test position on the 4 to 20 mA scale and compare them to thereadings on the ammeter.

NOTE: If testing of the current loop output is all that is required, the test can beperformed on the 4-20 mA options group screen without entering thecalibration mode. The 4-20 mA options group screen contains an independenttest slide bar that looks and operates similar to the one displayed in thecalibration mode. To activate the independent test slide bar, ensure that theTEST/CALIBRATION check box is checked and follow steps 14 and 15 of thisprocedure.

16. If the value displayed above the slide bar and the ammeter do not match, readjust thecalibration and retest it (steps 10 through 15).

NOTE: To return to the previous screen for repeating steps 10 through 15, click on the<BACK command button.

17. Click on the FINISH> button when complete.

18. Click on the SEND command button to apply the new current loop calibration settingsto the flowmeter.

NOTE: The current loop output maintains its present value for approximately 30seconds after exiting the calibration or test function.

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Setting the Current Loop Span

After the current loop has been calibrated, the span (flow rate associated with the 4 to 20mA output) can be set.

To set the span:

1. From the 4-20 mA options group, click on the 4-20 mA check box to enable the currentloop function.

2. Click on the FLOW RATE FOR 4 mA text box.

3. Enter the flow rate that equals the 4 mA (minimum) reading.

4. Click on the FLOW RATE FOR 20 mA text box.

5. Enter the flow rate that equals the 20 mA (full scale) reading.

F.4.9 RELAYS OPTION GROUP

The RELAY option group is accessed by clicking on RELAY(S) in the Options Column.This group contains the options for configuring and testing the relays.

NOTE: Refer to Section 2.5 for information on replacing the relay and to Section 2.4.4 forinformation on connecting the relay wiring.

IMPORTANT: The relay and current loop functions on the DCT1088 are mutuallyexclusive. Only one of these functions can be enabled at a time. Whenprogramming, testing, or operating the relay on a DCT1088, the currentloop function must be disabled. (The 4-20 mA check box must beunchecked.).

Programming the Relays

One optional programmable relay is available for the DCT1088 and four optional relaysare available for the DCT6088 for functions such as alarm, pump control, etc. The relayON and OFF conditions can be independently programmed for each relay for a specifiedflow, signal strength, or totalizer value. Alternatively, the relay can send a pulse to aremote device (for example, a totalizer, sampler, or chlorinator) whenever the internaltotalizer advances by one unit. The relays can be tested (manually turned on and off) byclicking buttons on the screen.

The output for the PULSE selections is limited to one cycle per second. The pulse duration(relay ON time) is approximately 200 milliseconds. If the totalizer increments at more thanonce per second, the flowmeter keeps track of how far behind the relay pulses are. Theflowmeter then catches up when a flow condition occurs where the totalizer increments at arate of less than once per second. To prevent the relay pulse output from falling behind, thetotalizer multiplier (Section F.4.7) should be selected such that at the maximum anticipatedflow rate the totalizer increments at once per second or less. For example if the totalizerunit is in gallons and the maximum anticipated flow is 600 gallons per minute (10 gallonsper second), a multiplier of 10 should be selected.

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The net totalizer can either increment or decrement depending upon the direction of theflow. Since the external totalizer (driven by the net totalizer pulse) can only increment, theflowmeter stops transmitting pulses whenever negative flow is being measured. Theflowmeter keeps track of the negative flow and does not start sending pulses to the externaltotalizer until the measured negative flow has been canceled out by positive flow. If anapplication has negative flow for extended periods of time, separate external totalizersshould be used, driven by the positive and negative totalizers. The net flow total can thenbe determined by subtracting the value for the negative external totalizer from the value forthe positive external totalizer.

To program the relays, follow these steps for each individual relay:

1. From the RELAY options group, click on the down arrow to the right of the RELAYNUMBER text box.

Relay numbers 1 through 4 are available.

2. Click on the desired relay number.

NOTE: When configuring the relay for the DCT1088, relay number 1 must beselected.

3. Click on the down arrow to the right of the MODE text box.

The following relay mode selections are displayed:

! OFF - (for turning off the relay function)

! PROGRAM - (for setting the relay ON and OFF conditions)

! PULSE NET - (for sending a pulse to a remote device whenever the net totalizeradvances by one unit)

! PULSE POS - (for sending a pulse to a remote device whenever the positivetotalizer advances by one unit)

! PULSE NEG - (for sending a pulse to a remote device whenever the negativetotalizer advances by one unit)

If the OFF selection or one of the PULSE selections is chosen, the relay configurationprocedure is completed. If PROGRAM is selected, the relay ON and OFF conditionsmust be set in the following steps. The OFF condition value should be entered inconjunction with the ON condition value to establish a “dead band”. This prevents therelay from continuously cycling on and off when the flow is close to the ON or OFFvalue. For example, if the ON condition is FLOW > 250 gallons per minute, the OFFcondition may be set at FLOW < 240 gallons per minute. At these settings, the relayturns on when the flow exceeds 250 gallons per minute and does not turn off until theflow falls below 240 gallons per minute.

4. Click on the down arrow of the first ON condition pull-down list.

The following ON condition selections are displayed:

! FLOW

! SIG STRENGTH

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5. Click on the desired ON condition selection.

6. Click on the down arrow of the second pull-down list.

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The “greater than” and “less than” modifiers are displayed:

! >

! <

7. Click on the desired modifier.

8. Click on the ON condition text box (on the right) and enter the ON condition value.

9. Set the relay OFF condition in a manner similar to setting the ON condition (steps 4through 8).

Testing the Relay

The relay can be tested by turning it on and off in the RELAY options group.

IMPORTANT: While the relay is being tested, the relay cannot respond to flow conditions.

To test the relay:

1. From the RELAY options group, click on the TEST check box to display a check mark.

NOTE: The test mode will automatically disable itself after several seconds if there isno mouse or keyboard activity.

2. Click on the ON command button to turn on the relay or the OFF command button toturn off the relay.

During the test, the relay should audibly click as it opens or closes and the relay’s LEDshould light up when the relay is ON.

3. After the testing is completed, cancel the test function by clicking on the TEST checkbox again to remove the check mark.

The relay returns to normal operation.

F.4.10 OPTIONS GROUP

The OPTIONS group is accessed by clicking on OPTIONS in the Options Column. Thisgroup contains several miscellaneous functions, including baud rate setup for RS232communications, and user-designated identification for the specific flowmeter unit whichis being used.

Flowmeter Baud Rate

For information on changing the flowmeter baud rate, refer to Section F.6.2.

Unit Tag and Unit Identification Number

A particular flowmeter or site may be identified by entering a unit tag (unit name) and unitidentification number. The name and number are determined by the user.

To identify the instrument:

1. From the OPTIONS group, click on the UNIT TAG text box

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2. Enter the name of the unit, using any combination of alpha-numeric characters.

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3. Click on the UNIT ID text box

4. Enter the identification number of the unit, using any whole number between 1 and60,000.

F.4.11 DISPLAY OPTION GROUP

The DISPLAY option group is accessed by clicking on DISPLAY in the Options Column.This function is applicable only to DCT1088 flowmeters which have the optional display.The display can be configured to indicate any combination of flow rate, totalizer, or signalstrength values. For multiple selections, a cycle time can be entered to allow the display toalternate between selections.

To configure the display:

1. Click on one or more of the following check boxes in the DISPLAY options group:

! FLOW RATE

! SIGNAL STRENGTH

! TOTALIZER

2. If more than one check box was selected, click on the CYCLE TIME text box and enterthe cycle time (in whole seconds).

3. If TOTALIZER was checked, click on one of the following radio buttons (one only):

! NET (net totalizer)

! POS (positive totalizer)

! NEG (negative totalizer)

NOTE 1: The following flow units cannot be represented on the display of the flowmeter:

! Cubic feet

! Oil barrels

! Liquor barrels

! Feet

! Meters

If one of these flow or totalizer units is selected, a blank space is left where theunit would normally be located on the display. The flow or totalizer numericvalue, however, is still displayed regardless of which unit is selected.

NOTE 2: The totalizer reading on the flowmeter display is followed by a slash symbol / (a“per” symbol) if a totalizer multiplier other than 1 is selected. For example, atotalizer value of 2500 cubic meters with a totalizer multiplier of x100 would bedisplayed as: 25 M3/ .

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F.5 Viewing the Flow Data in the Graph TabAfter the flowmeter has been configured (Section F.4), the values for signal strength,velocity, flow rate, and totalized flow can be observed in the GRAPH tab (Figures F-21through F-23). In addition to numerical flow data, a graphical representation of a signalsample is displayed for analysis.

The yellow waveform on the graph represents the signal from the upstream transducer,while the green waveform represents the signal from the downstream transducer. The Y(vertical) axis of the graph represents signal amplitude and the X (horizontal) axisrepresents time in microseconds. The signal from the upstream (UP) and downstream(DOWN) transducers can be displayed separately or simultaneously by clicking on theappropriate check boxes located in the upper left corner of the graph.

The differential transit time of the upstream and downstream signals is represented by thehorizontal distance between the peaks of the two waveforms. The greater the horizontaloffset, the higher the flow rate.

To view a sample of the signal in different time resolutions, the graph can be scaled withone of several time divisions along the X axis. The following time divisions selections aredisplayed beneath the graph:

! 0.1 Τs/div (0.1 microseconds per division)





The horizontal scroll bar located at the bottom of the graph may be used to view theportions of the sample which are not currently displayed. Figures F-21 through F-23illustrate examples of the same signal as it would be displayed on the graph with threedifferent time divisions (0.5, 1.0, and 5.0 microseconds per division).

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Figure F-21 Graph with 0.5 Microseconds per Division (example)


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The Y axis can also be displayed with one of several scaling factors.

To select a scale for the Y axis, click on the down arrow to the right of the Y text box(located in the upper right corner of the graph) and click on one of the following Y scalingfactors:

! x1

! x2

! x4

For further analysis of a particular signal sample, the image can be “frozen” on the graphbefore the sample is updated by clicking the STOP check box in the lower right corner.

NOTE: The RESET button on the GRAPH tab is used for resetting the totalizers.

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F.6 RS232 CommunicationsThis section describes RS232 communications for TimeGATE™ and how to transmit acommunications test message for diagnostic purposes. The baud rate and com port are theonly RS232 parameters that can be selected for TimeGATE™. Parity is preset at none, thecharacter size is preset at 8, and the stop bits are preset at 1. (All selections are N,8,1.)Com port 1 or 2 can be selected. In addition, baud rates of 1200, 2400, 4800, 9600, or19200 can be selected.

IMPORTANT: Prior to connecting TimeGATE™ to a DCT6088 or DCT7088, ensure thatthe TIMEGATE selection in Menu 46 is active. To activate the TIMEGATEselection in these flowmeters:

! Access Menu 46.

! Select TIMEGATE from the flowmeter display.

! Access Menu 00.

F.6.1 WHEN TimeGATE™ CANNOT CONNECT

When starting TimeGATE™ (Section F.3), the Welcome Screen is displayed, followed bythe Connecting Screen (Figure F-24). If the units connect properly, an X is momentarilydisplayed to the left of SYSTEM IDENTIFICATION, and TimeGATE™ connects.


If the X is not displayed, TimeGATE™ does not connect and the Connecting Screenremains, offering the following options:

! EXIT - To quit TimeGATE™

! OFFLINE - To access the TimeGATE™ screens in an offline session without connectingto the flowmeter (Section F.6.3)

! COMM SETUP - To change the com port or baud rate settings of the PC

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When TimeGATE™ cannot connect and the cause is unknown, complete the followingsteps in order from the Connecting Screen until the units connect:

1. Ensure that the cable connections are tight and that the cable is a null modem cable.

2. Click on the COMM SETUP command button.

The Communications Setup Screen is displayed (Figure F-25):

Figure F-25 Communications Setup Screen

In the Communications Setup Screen, the com port and baud rate for the PC can beselected. The com port selected for the PC must currently be available for use byTimeGATE™. (There cannot be com port conflicts.) The baud rate selected for the PC mustmatch the current baud rate of the flowmeter.

3. Try the PC’s other com port as follows:

! Click on the down arrow to the right of the COM PORT text box.

! Click on the other com port selection.

! Click on OK.

NOTE: If the selected com port is not available, a message is displayed askingwhether the other com port should be used. If this occurs, click on YES.

4. From the Communications Setup Screen, try changing the PC’s baud rate as follows:

! Click on the down arrow to the right of the BAUD RATE text box.

! Click on the most likely baud rate used by the flowmeter.

! Click on OK and wait several seconds.

5. Repeat step 4, trying a different baud rate each time until the units connect.

F.6.2 CHANGING THE BAUD RATE ON THE FLOWMETER

The baud rate is the only RS232 parameter that can be selected for the flowmeter. The comport is preset at 1, parity is preset at none, the character size is preset at 8, and the stop bitsare preset at 1. (All selections are N,8,1.) Baud rates of 1200, 2400, 4800, 9600, or 19200

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can be selected. The baud rate on the flowmeter can be changed using TimeGATE™ onlywhen TimeGATE™ is connected online.

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To change the baud rate on the flowmeter:

1. Connect online with TimeGATE™ (Section F.3).

2. From the OPTIONS group on the CONFIGURATION tab, click on the down arrow tothe right of the FLOWMETER BAUD RATE text box.

3. Click on the desired baud rate for the flowmeter.

4. Click on the SEND command button.

5. From the top of the screen, select CONFIGURE from the COMMUNICATIONSpull-down menu.

The Communications Setup Screen is displayed (Figure F-25).

6. Click on the down arrow to the right of the BAUD RATE text box.

7. Click the baud rate selection for the PC which matches the new baud rate setting for theflowmeter and click on OK.

8. Exit from TimeGATE™ by selecting EXIT from the FILE pull-down menu.

9. Restart the flowmeter by turning the power to the flowmeter off and back on again.

The flowmeter should now be able to connect to TimeGATE™ at the new baud rate.

F.6.3 RUNNING TimeGATE™ IN AN OFFLINE SESSION

TimeGATE™ can be run in an offline session in order to view and edit the configurationsettings. The OFFLINE option is offered in the Connecting Screen (Figure F-24) if theunits fail to connect. Flow and configuration data cannot be sent or received by theflowmeter in an offline session. However, the settings can be saved to a file for futureonline connections (Section F.4).

F.6.4 COMMUNICATIONS TEST MESSAGE

To transmit a communications test message:

1. From the COMMUNICATIONS tab, select TEST COMM.

If communications are functioning normally, a test data string is displayed. Figure F-26illustrates an example:

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Figure F-26 Communications Test Message (example)

2. To exit the test function, click on OK or CANCEL.

F.7 Manufacturing DataThe MANUFACTURING tab (Figure F-27) contains flowmeter software and hardwareinformation used by the factory. This information is not configurable by the user.

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Figure F-27 Manufacturing Tab

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The following information is displayed on the MANUFACTURING tab:

! Sales order number

! The following hardware information:

- Hardware version number

- Serial number

- Manufacturing date

- Unit type

- Number of channels

! Flowmeter software version number

F.8 Master Erase FunctionThis section describes the procedure for performing a master erase of all user-enteredconfiguration data on the flowmeter.

IMPORTANT: The baud rate must be set at 19200 for the master erase function to operate.

To perform a master erase:

1. Exit from TimeGATE™ if it is currently running by selecting EXIT from the FILEpull-down menu.

2. Turn off power to the flowmeter.

3. Run TimeGATE™.

The Connecting Screen is displayed (Figure F-28):


4. Turn on power to the flowmeter.

The Mini Bios Options Screen is displayed (Figure F-29):

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Figure F-29 Mini Bios Options Screen

5. Click on the MASTER ERASE button.

The Master Erase Confirmation Screen is displayed (Figure F-30):

Figure F-30 Master Erase Confirmation Screen

6. Type yes in the text box of the Master Erase Confirmation Screen and click on the OKbutton.

TimeGATE™ connects with all configuration parameters reset.

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F.9 Upgrading the Flowmeter SoftwareThe version number for the flowmeter’s software can be viewed in the Manufacturing Tab(Section F.7). The flowmeter can be upgraded in the field by downloading new softwareinto its Flash memory. The software upgrade file is available on diskette from PeekMeasurement or by modem download from the Peek Measurement web site atwww.peekmeas.com.

IMPORTANT: The baud rate must be set at 19200 for the software upgrade function tooperate.

CAUTION:

If the flowmeter contains any data log files, these files may be deletedduring a software upgrade.

To upgrade the flowmeter:

1. Exit from TimeGATE™ if it is currently running by selecting EXIT from the FILEpull-down menu.

2. Turn off power to the flowmeter.

3. Run TimeGATE™.

The Connecting Screen is displayed (Figure F-28).

4. Turn on power to the flowmeter.

The Mini Bios Options Screen is displayed (Figure F-29).

5. Click on the UPGRADE SOFTWARE button.

The Software Upgrade Screen is displayed:

Figure F-31 Software Upgrade Screen

6. Enter one of the following in the text box of the Software Upgrade Screen and click onOK:

! A:\1088.HEX (for upgrading a DCT1088)

! A:\DCT.HEX (for upgrading a DCT6088 or DCT7088)

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NOTE: If the software upgrade file is in a location other than drive A, alter thecommand accordingly. For example, if upgrading a DCT1088 and the disketteis in drive B, enter B:\1088.HEX.

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The upgrade may take several minutes to complete. While the software is beingdownloaded, the Download Status Screen is displayed (Figure F-32):

Figure F-32 Download Status Screen

The Mini Bios Options Screen is displayed again (Figure F-29).

7. Run the new software by clicking on the START PROGRAM button on the Mini BiosOptions Screen.

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