comp sys fds final 2

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k:\1614 helang gas & condensate\documents\fdsasbuiltfinal2.doc M1914 Helang Metering

Page 1 of 395 Issue 7

NIPPON OIL EXPLORATION (MALAYSIA) LTD

HELANG CENTRAL PLATFORM

GAS & CONDENSATE FISCAL METERING SYSTEM HDP/PO/01/209

COMPUTER SYSTEM FUNCTIONAL DESIGN SPECIFICATION

NIPPON VDRL CODE: 1.12/2.18

VENDORS DOCUMENT NUMBER: 1614/2005

Notes:

E 14.02.04 Final As Built ACL NAL D 13.01.03 Inc Comments ACL WM C 29.01.02 Inc Comments ACL MW B 05.01.02 Not Issued ACL MW A 12.11.01 For Approval ACL MW

Rev. Date Issue Status Prep. By Checked By Approved By

Alderley Controls



Functional Design Specification

Helang Metering System

Flow Metering System

Prepared for:

Alderley Systems Ltd

Alderley Controls Limited Arnoldsfield Estate The Downs Wickwar Wotton-under-Edge Glos GL12 8JB

+44 (0)1454 292100

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Contents 1 REVISION CONTROL ............................................................................................................................................6

2 INTRODUCTION....................................................................................................................................................8 2.1 Standards and specifications...................................................................................................................8 2.2 Document Scope.....................................................................................................................................8 2.3 Abbreviations and Acronyms .................................................................................................................9

3 SCOPE OF SUPPLY..............................................................................................................................................10 3.1 Panel Hardware.....................................................................................................................................10 3.2 Equipment Supplied Loose...................................................................................................................10 3.3 Software and configuration...................................................................................................................10 3.4 Documentation......................................................................................................................................10

4 SYSTEM OVERVIEW...........................................................................................................................................11 4.1 Gas Export Metering System................................................................................................................11 4.2 Condensate Export Metering System ...................................................................................................11

5 PANEL ...............................................................................................................................................................12 5.1 Panel shell.............................................................................................................................................12 5.2 Field cable handling..............................................................................................................................12 5.3 Power ....................................................................................................................................................13 5.4 Earthing ................................................................................................................................................14 5.5 Zener Barriers .......................................................................................................................................14 5.6 Wiring...................................................................................................................................................14 5.7 Wire identification ................................................................................................................................14 5.8 Accessories ...........................................................................................................................................15

6 SYSTEM FEATURES............................................................................................................................................16 6.1 Introduction ..........................................................................................................................................16 6.2 Computer Hardware .............................................................................................................................17 6.3 Ram Battery..........................................................................................................................................21 6.4 Signal Handling ....................................................................................................................................21 6.5 System Communications ......................................................................................................................22 6.6 Stream Status ........................................................................................................................................24 6.7 Maintenance Mode ...............................................................................................................................24 6.8 Security System ....................................................................................................................................25 6.9 Totals ....................................................................................................................................................26 6.10 Configuration and Constants ................................................................................................................27 6.11 Alarms ..................................................................................................................................................27 6.12 Display Units and formats ....................................................................................................................29

7 CONDENSATE STREAM FLOWCOMPUTERS ....................................................................................................31 7.1 General Features ...................................................................................................................................31 7.2 Functions ..............................................................................................................................................34 7.3 Input / Output Definition ......................................................................................................................36 7.4 Calculations ..........................................................................................................................................39 7.5 Displays ................................................................................................................................................45 7.6 Alarms ..................................................................................................................................................46

8 PROVER COMPUTER ..........................................................................................................................................51 8.1 General Features ...................................................................................................................................51 8.2 Proving .................................................................................................................................................51 8.3 Proving Sequences................................................................................................................................54 8.4 Prover Connection Schedule.................................................................................................................58 8.5 Calculations ..........................................................................................................................................60 8.6 Displays ................................................................................................................................................66 Alarms ..............................................................................................................................................................71

9 GAS STREAM FLOWCOMPUTER.......................................................................................................................78 9.1 General Features ...................................................................................................................................78

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9.2 Functions ..............................................................................................................................................84 9.3 Input / Output Definition ......................................................................................................................86 9.4 Calculations ..........................................................................................................................................88 9.5 C5+Liquid Calculations........................................................................................................................98 9.6 Displays ..............................................................................................................................................101 9.7 Alarms ................................................................................................................................................102

10 BACK-UP GAS FLOWCOMPUTER .................................................................................................................107 10.1 General Features .................................................................................................................................107 10.2 Functions ............................................................................................................................................107 10.3 Input / Output Definition ....................................................................................................................107 10.4 Calculations ........................................................................................................................................109 10.5 Displays ..............................................................................................................................................110 10.6 Alarms ................................................................................................................................................112

11 BUY BACK GAS FLOWCOMPUTER ...............................................................................................................119 11.1 General Features .................................................................................................................................119 11.2 Functions ............................................................................................................................................120 11.3 Input / Output Definition ....................................................................................................................121 11.4 Calculations ........................................................................................................................................122 11.5 Displays ..............................................................................................................................................123 11.6 Alarms ................................................................................................................................................125

12 SUPERVISORY COMPUTERS .........................................................................................................................129 12.1 Hardware Specification ......................................................................................................................129 12.2 General Features .................................................................................................................................130 12.3 Meter Factor Linearisation .................................................................................................................132 12.4 Functions ............................................................................................................................................135 12.5 Input / Output Definition ....................................................................................................................137 12.6 Calculations ........................................................................................................................................139 12.7 Displays ..............................................................................................................................................141 12.8 MMI Display Details ..........................................................................................................................142 12.9 Alarms ................................................................................................................................................148 12.10 Printing and Reports .......................................................................................................................158 12.11 Report Formats ...............................................................................................................................160

13 COMMUNICATIONS ......................................................................................................................................180 13.1 Chromatograph Communications .......................................................................................................180 13.2 Analyser Control.................................................................................................................................184 13.3 Modbus Communications...................................................................................................................186

14 PLC.............................................................................................................................................................195 14.1 PLC Connection Schedule ..................................................................................................................196

15 SAMPLE LOOP P& ID CONTROLLER .............................................................................................................199 15.1 Connection Schedule ..........................................................................................................................200

16 VALIDATION SYSTEM ..................................................................................................................................201 16.1 .................................................................................................................................................................201

17 OFF-LINE METERING P.C. ...........................................................................................................................203 17.1 Functions ............................................................................................................................................204 17.2 Laboratory Data ..................................................................................................................................204 17.3 Condensate Calculations.....................................................................................................................205 17.4 Reports................................................................................................................................................207

18 APPENDIX....................................................................................................................................................209 18.1 Flowcomputer Specification ...............................................................................................................209 18.2 S600 Connection Schedules ...............................................................................................................210

19 AS- BUILT REPORTS....................................................................................................................................227

20 AS-BUILT DISPLAYS ...................................................................................................................................244

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20.1 S600 Gas Export .................................................................................................................................244 20.2 Gas Back Up.......................................................................................................................................275 20.3 Buy Back Gas .....................................................................................................................................325 20.4 Export Condensate..............................................................................................................................351 20.5 Prover .................................................................................................................................................376

21 APPENDIX....................................................................................................................................................396 21.1 Supervisory Displays ..........................................................................................................................396 21.2 Calculation Flowcharts .......................................................................................................................396

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Section Issue Date By Comment All 1.0 21/09/2001 B Horner Original All 2.0 03/12/2001 B Horner Incorporate Customer Comments All 3.0 23/01/2002 B Horner Incorporate Customer Comments All 4.0 05/04/2002 B. Horner Update to As-Built status All 5.0 14/11/2002 B. Horner Add flow charts, incorporate customer comments All 6.0 23/06/2003 B. Horner Incorporate UGSA Mods FDS All 7.0 19/01/2004 B. Horner Incorportae UGSA C5+ mods addendum.

Holds

Hold Paragraph Description

Variations

The following changes in this document are the subject of outstanding variation requests. If they are included in this document, their inclusion in this document is provisional, subject to acceptance of Alderley Controls commercial and delivery terms.

Variation Paragraph Description

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Document QA Record

Client: Alderley Systems Ltd

Order No. 01/JK/1614

Project Title. Helang metering System Works Order Reference. M1914

Document Title. Functional Design Specification

File Reference k:\1614 helang gas & condensate\documents\fdsasbuiltfinal2.doc

Prepared By:

Brian Horner

Reviewed By:

Mike Seabrook

Client Approval (Stamp/Sign)

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It is the purpose of this document to describe the Helang Central metering system to be supplied to Alderley Systems on purchase order 01/JK/1614.

The metering computer system operates to the following major standards -

AGA8 - Natural Gas Density and Compressibility, Second Printing, July 1994 ISO 6976 Natural gas calculation of Calorific Value, Density and Relative Density, 1995 API MPMS Chapter 12, Calculation of Petroleum Quantities. API MPMS Chapter 12.2, Calculation of Liquid Petroleum Quantities Measured by Turbine or Displacement Meters. API MPMS Chapter 4 Proving Systems ISO 5167 Measurement of fluid flow by means of Orifice Plates, Nozzles and Venturi Tubes inserted in Circular Cross Section Conduits running full, 1998 Correction Factor (CTLm) IP Paper 2 (ASTM D 1250) Correction Factor (CPLm) API Ch 11.2.1M, 1984 Density Correction API Ch 12 Conversions API 2564 Ch15 Measured Density Solartron User Manual GPA Standard 2186-02 GPA Standard 8173-94 GPA Standard 2145-92 ASTM D -1250:IP200, Table 52

All calculations are performed to full accuracy without rounding or truncation

The items listed and functionality explicitly detailed in the FDS will be supplied by Alderley Controls Ltd to Alderley Systems Ltd. Any additional items or functionality, implicit or not, are above and beyond the scope of supply.

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!!" #

The following table lists all the abbreviations and acronyms used in this FDS.

Abbreviation Meaning AC Alternating current ACL Alderley Controls Limited ADC Analogue to digital converter AGA American Gas Association ATM Acceptance test manual CCR Central control room CER Central equipment room CPU Central processor unit DAC Digital to analogue converter DC Direct current DCS Distributed Control System DRAM Dynamic Random Access Memory (not battery supported) S600 Daniel flow measurement computer EEPROM Electrically erasable programmable read only memory FDS Functional design specification FPGA Field programmable gate array FSK Frequency shift keying GPA Gas Processors Association HART Highway Addressable Remote Transducer H/W Hardware IC Integrated circuit IS Intrinsically safe ISO International Organisation for Standardisation KIMS Kelton Instrument Management System mA Milli-ampere MOV Motor operated valve MPMS Manual of Petroleum Measurement Standards MTBF Mean Time Between Failures O&M Operation and maintenance manual PC IBM compatible personal computer PRT Platinum resistance thermometer PSU Power Supply Unit RAM Random access memory RTC Real Time Clock S/W Software SCSI Small Computer System Interface (normally for disc drives) SPIR Spare parts and interchangeability record SRAM Static Random Access Memory (usually battery supported) t Metric tonne UCP Unit control panel UPS Un-interruptable power supply UTP Un twisted pair UVPROM, PROM UV erasable programmable read only memory V Volts VAC Volts, alternating current VDC Volts, direct current VDU Visual display unit

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$%$$&

$'()

Item Qty Description Model 1 3 Export Gas Flowcomputer Daniel S600 2 1 Back Up Gas Flowcomputer Daniel S600 3 1 Buy Back Gas Flowcomputer Daniel S600 4 2 Condensate Flowcomputer Daniel S600 5 1 Prover Computer Daniel S600 6 1 PLC Modicon Momentum 7 2 Operator Workstation AMC-500 4U Rack mount PC 8 1 Electronic Chart Recorder Eurotherm 4101C 9 1 Sample loop P & ID flow controller Eurotherm 2604 10 1 3 bay Panel incorporating above and c/w

terminals, barriers etc Rittall PS 4808 series

*'

Item Qty Description Model 1 1 Laser Printer (Colour) Laserjet 4500N 2 1 Dot Matrix Printer c/w Sound Abatement cover

& paper receptacle Epson LQ 680

3 1 Validation System Kelton Instrument Management System 4 1 Off-Line Metering PC Compaq EVO

)+

Item Qty Description 1 2 Supervisory flow computer configuration (two identical copies) 2 2 Citect software licence (single user) 3 2 Turbine meter configuration 4 3 Gas Export configuration 5 1 Gas Buy back configuration 6 1 Gas Back Up configuration 7 2 Microsoft Windows NT licence 8 1 Citect version 5 PC configuration 9 1 Database Configuration on Off-Line Metering PC

,

The following documentation will be supplied:

Item Description 1 Functional Design Specification (FDS), incorporating:

System overview diagram 2 Operation and Maintenance Manual (O&M) 3 Completed Acceptance Test Manual (ATM) 4 Recommended spares list - commissioning 5 Recommended spares list - 2 years operation

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, &- .

This Functional Design Specification describes the metering system to be supplied for use on the Helang Central Platform

The metering system consists of a gas export metering system and condensate export metering system, prover, back up and buy back gas metering implemented using Daniel S600 flowcomputers. The supervisory functions are incorporated in a pair of PCs in duty standby mode and a PLC providing additional supervisory I/O. The measurement computers are housed in a 3-bay panel for installation in the Instrument Equipment Room. The panel will house all computers, the PCs, monitor and keyboard with integral trackerball, the chromatograph controller and recorder, barriers and terminals to connect to the plant instrumentation.

The workstation provides overall supervision and control of the gas export metering system, the condensate export metering system, prover system and buy back gas metering. Two printers are provided with the system; a laser printer for metering report printing and screen dumps from the workstation, and a dot matrix printer for alarm printing. The printers are supplied loose for mounting on suitable tables (by others) in the Central Control room.

The gas and condensate flowcomputers are connected to each of the supervisory computers via dual redundant data highways. The primary connection uses Ethernet and the secondary connection is an RS485 serial link using Modbus protocol. An off-line metering PC is provided for entry of laboratory data for the Condensate system and re-calculation of the component mass totals heat content and standard volume for the period covererd by the laboratory sample results. The offline PC is connected to the system Ethernet highway and prints reports to the system laser printer.

, /0- +#

The gas export metering system consists of 3 x 50 % orifice plate meter runs each connected to a dedicated flow computer. Each flowcomputer accepts analogue (4-20mA) signals from 4 x DP transmitters, 1 x Pressure transmitter and a temperature element (PRT). Density measurement is performed using a pulse input from a densitometer in each meter run. A common gas chromatograph installed upstream of the meter runs provides gas composition via a serial link to the supervisory computer and the gas export flowcomputers and is used for density calculation according to AGA8. The gas composition is downloaded from the supervisory computer to the back up gas flowcomputer and the buy back gas flowcomputer. A time and flow proportional pulse output is provided from the PLC for the gas sampling system.

A single back up flowcomputer accepts the signals for three sets of back up transmitters and provides a metering back up for all three streams.

, 0- +#

The condensate export metering system consists of 2 x 100% turbine meter runs and a bi directional loop prover. A dedicated flowcomputer is provided for each meter run and the prover loop. The flowcomputers accept dual pulse inputs from the turbine meter, an analogue (4-20mA) signal representing pressure and a PRT signal representing temperature. Dual densitometers mounted in the header provide pulse signals to each flowcomputer for density measurement. Temperature and pressure measurements at the densitometer header are also wired to each flowcomputer. A time and flow proportional pulse output is provided from the PLC to the sample system on the densitometer loop.

, $"

A dedicated S600 computer is provided to interface to the bi-directional sphere type prover. The prover computer accepts analogue (4-20mA) signals representing inlet and outlet pressures, and PRT signals representing inlet and outlet temperatures. Four sphere switches are fitted to the prover and a pair of switches are selected for use by the prover computer. The prover computer is connected to the supervisory computers and in addition communicates with the condensate stream computers via a dedicated serial bus to gather data and control the stream valves.

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1 $

One Rittall 3 bay panel will be provided for the field interface devices and the Supervisory computers to be installed in the Instrument Equipment Room. The metering equipment will be front of panel mounted with rear access afforded by three hinged removable doors.

1 $'2''

The panel shell will consist of three Rittal PS4800 bays, with front of panel dimensions nominally 2400mm wide x 800 deep x 2000 high. Details are summarised below:

Number of bays 3 Cable entry Bottom fitted with Rittal clamp rails and cable clamps Front doors None Ventilation Louvred Rear Doors, Roof fans. Rear doors 3 Plinth Standard (add 100mm to height) Colour RAL 7032 Light Grey Lifting 12 eyebolts

1 %'!'2'+

Field cable armour will be made off to glands fitted in detachable gland plates at the bottom of the panel. Rittal clamp rails type PS 4193 shall be fitted complete with cable clamps.

Field cable cores will be routed in open slot trunking dedicated to field wiring, and terminated in the panel as follows:

Signal type Termination Not intrinsically safe Klippon SAKR/35 - beige Intrinsically safe Klippon SAKR/35 - blue Incoming Power Klippon SAK - beige

Sufficient barriers will be provided to terminate all used field loops. Any additional spare cores of IS cables are terminated to blue Klippon SAK/35 terminals clipped to the isolator mounting rail. Terminals and isolators will be mounted on top hat profile rail.

All terminal rails including those in AC and DC circuit breakers and distribution boxes will provide 25% spare capacity.

Trunking lids for IS wires on the hazardous area side of the Zener barrier are colour coded blue. All other wiring, including IS circuits on the safe area side of Zener barrier are run in standard grey trunking. All trunking will be Tehalit type.

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1 $)

The panel accepts dual 240V +/- 10% AC 50Hz +/- 60Hz feeds from a UPS system, one nominated primary feed and one backup. In the event of failure of the primary supply automatic switchover to the back up supply will occur.

Incoming AC power is terminated to EMC filters mounted in a screened enclosure. In order to meet EC requirements for conducted RFI immunity, the sheath of the incoming supply cables must be made off to an EMC gland attached to the filter box.

AC power passes from the transient filter through an isolator into a fuse box fitted with approximately 5 double pole magnetic over current circuit breakers. Circuit breakers ratings are generally selected to protect panel wiring, individual pieces of equipment being protected by their own fuses.

Two 24VDC power supplies, supplied from the AC feed, are combined with diodes to ensure bumpless transfer. Each 24V supply will provide an alarm output. 24VDC power is distributed via 8-way fuse modules with power status indication.

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1, 2+

The panel is fitted with three separate and independent earth bars:

Safety Earth (SE) for connection of panel steel work, chassis of all devices and ground of AC power equipment.

Instrument Earth (IE) for connection of cable shields and negative side of analogue nad digital loops

Intrinsically Safe Earth (IS) for connection of Zener barrier earth. All removable panels and doors are bonded to protective earth bar using yellow / green wire. It is critical to the safe and reliable operation of the panel that clean, reliable earth connections be provided for all earth rails.

11 34

MTL 700 series zener barriers will be used for IS signals, as follows:

Sensor type Interface HART & 4-20mA inputs MTL 787S Densitometer Inputs MTL 787S

The analogue signal representing % age full from the gas sample can will be interfaced using an Elco 325 barrier

15 .+

Signal type Wire type Colour Size (mm2)

Power distribution (+24V) PVC, single Red 2.5 Power distribution (0V) PVC, single Black 2.5 Signals (normal) PVC, single Grey 1.0 Signals (IS) PVC, single Blue 1.0 Solenoid signals PVC, single Grey 2.5 Power distribution (240V) PVC, triple

Sheath Black Live Brown 2.5 Neutral Light Blue 2.5 Earth Yell/Grn 2.5

Protective earth PVC, single Yell/Grn 6 Clean earth PVC, single Light Grn 2.5 IS earth PVC, single Yell/Grn 6

Note: The connection to the S600 computers uses D type connectors with solder bucket connections which take a maximum wire size of 0.2mm.

All panel wires are terminated in bootlace ferrules, and identified with a computer-printed sleeve. Where termination of two wires in a single terminal cannot be reasonably avoided, one double ferrule is used for both wires.

Earth wiring to doors, gland plates and other moveable parts will be 6mm.

16 .

Wires within the panel will be identified using heat shrink labels, using four digits in the form ab-cd indicating sheet number and wire number. For example, 12-34 indicates wire number 34 on sheet 12 of the panel wiring diagram. Incoming terminals / isolated repeaters will be identified by client tag number.

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17

Each panel bay is equipped with one each of the following:

240VAC light, with integral switch 240V roof fitted ventilation fan 240V utility socket Drawing pocket

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5 &- %

5

This chapter specifies those features that are common to the metering system computers. Please refer to later sections for specific details of each configuration, and to details that are specific to the project.

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5 ()

S600 Front of Panel View

LCD Display

Function KeysAlarm Keys & LightVector and Menu Keys

Numeric Keys

Operation Keys

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5 %8#

At the top of the Keypad are ranged four yellow Function keys, numbered F1 to F4. Each F key may be programmed as a shortcut to a frequently used display page. The Period key (.) is used to program the function of these keys.

5 -8#

The directional Vector key is located just below the Function keys, and is used to select the parameters to view or change.

Use the Vector key to move around the matrix of display cells. Select Right or Left vector keys to move along the row of data items on either side of the current display, i.e. increment or decrement the display number after the decimal point on the status line. You can see that the display wraps round from the last data item of the row, to the first. The Left key is also used as the delete/backspace key when entering or changing data. Use the Up or Down vector keys to view above or below the current display i.e. increment or decrement the display number before the decimal point on the status line. Note: When the display moves vertically to view another row, the data item shown is always the first display cell of that row. Press the Menu key to move up one level of the display tree. On a data page this key returns the user to the display parent menu. Useful information: Whilst on any menu page, pressing the Up vector key returns the user to the Main Menu. 5 '+28#

Press View to show the current alarm list in chronological order, the most recent alarm being displayed first. Details of one alarm will be shown at a time. Use the up and down keys to scroll through the alarms. If viewing alarms from a data page, the left or right vector keys will return the user to that page.

ALARM LIGHT Colour Function Green (solid) Normal operation,

No alarms present

Red (solid) At least one alarm present, All alarms previously acknowledged

Red (flash) At least one alarm present, and un-acknowledged

Yellow (flash) Display-keypad fault. Communications to the P152 CPU module from the front panel have failed

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Alarm Page Layout

====================

11/10/1998 10:35:40_ I/O01 DWNSTR DENS Low 0.0800 kg/m3

Alarm 1 of 11 ====================

Key: Row Description 1 Date and Time stamp of the alarm

Inverse video indicates the alarm is unacknowledged 2 Database object on which the alarm was raised. 3 Alarm descriptor 4 Snapshot value of the object as it went into alarm. 8 Alarm page description

5, 8#

The lower part of the Keypad houses the Numeric keys (light green). The Numeric Keys offer the full number set 0-9, decimal point (period) and a minus key. Numeric 0 to 9 These are used to enter or change data, and also used to navigate the display matrix. Minus (-) Used to enter negative quantities, and also used to define the Default Display. To assign a default display, press the minus key whilst on the required data display, but not at the data entry or menu page, and then follow the screen instructions. Period( . ) Used as a decimal point when entering fractional quantities and in addition used to define hot keys for rapid access to frequently used displays. This is done by pressing the period sign on the required display, but not at the data entry or menu level, and then following the screen instructions. 51 8#

The Operation keys (dark green) are used in conjunction with the Numeric keys to perform a variety of tasks. The Operation keys are Expt, Clear, Disp, Print, Chng and Enter. Exponent Used to enter quantities in Scientific notation. Where the value to be entered exceeds the space available on the display (20 characters), it is necessary to express the data in scientific (exponential) terms. Clear Used to cancel or exit from the current operation and return to the previous data display. This key is also used to activate the default display. Data Pages Generally each data page will display a single data item, along with its associated descriptor text, units and page description. On the bottom line of every data page is the Status/ID line. On the left hand side is the page reference number e.g. P12.5, followed by the number of associated data pages which can be traversed using the Left and right vector keys.

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On the right hand side, the character M appears when the unit is in Maintenance mode.

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5 4#

Each S600 flowcomputer is fitted with aback up battery. The back up battery is used to retain thecontents of the Static RAM on the CPU board, the PC compatible BIOS CMOS memory area and the calendar clock. The battery fitted is a Ni-MH rechargeable 3.6 V 140mAh unit. to ensure that the battery is fully functional , a regular load test is performed. Battery Characteristics

Hold Up Time (without re-charge) 48 Hours Battery Life 5-7 Years Hold Up Time (after load test failure) 2 Weeks @ 20 deg C

5, +'('+

5, '++'

Analogue signals (e.g pressure, differential pressure and density pressure and temperature) are connected to the flowcomputers in the form of 4-20mA signals. The signals are terminated by 250R precision resistors internal to the flowcomputers and selected by internal links. 5, +'

Four wire RTD s ( e.g. stream temperature) are connected directly to the flowcomputers. The excitation current of 1ma is sourced from the flowcomputer.

5, #+'

The density signals are in the form of pulse outputs direct from the transmitters and are optically coupled inputs to the flowcomputers. Pulse input modules are connected to the two condensate densitometers to enable connection to both stream computers.

5,, !-

The turbine meters are Faure Herman type producing current modulated signals. Connection to the flowcomputer is made using a Daniels P100 pulse conditioning module which converts the current modulated pulses to voltage and also maintains the line integrity checking.

5,1 +'

Digital inputs are optically coupled to the flowcomputers. The digital inputs share a common 24vdc supply in (groups of four) which are externally connected.

5,5 '"

The motor operated valves are monitored for their open and closed status.

These valve status inputs are interpreted as follows:

Open Limit Switch Closed Limit Switch Status O/C S/C Open S/C S/C Moving S/C O/C Closed O/C O/C Failed

Where, O/C = Open Circuit and S/C = Short Circuit.

Valves that are detected as failed shall raise an alarm, which is displayed on the supervisory and printed in the alarm log.

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5,6 ''+'')

If the flowcomputer detecst a flowcondition ahen the input and output valves are closed and the flowcomputer is not in Maintenance mode, then this will be deemed an illegal flow condition and the illegal flow alarm will be raised. 5,7 '"

The valves shall be driven by the stream flow computers when in Remote mode. In the case of the flow computer driving the valve, the output shall be held active for a user defined drive period. If after another user-defined period the valve has failed to achieve the desired position an alarm shall be raised.

5,9 +'

Digital and pulse outputs are provided in the form of open collector transmitter outputs. the outputs are grouped in fours with the transmitter emitters connected to a common ground.

5,: '+

Four analogue outputs are provided on each flowcomputer. The outputs are internally supplied from 15 volts with a maximum loop impedance of 650 ohms.

51 #

51 2

The gas export metering system flowcomputers, the buy back flowcomputer, the back up gas flowcomputer, the condensate export metering system flowcomputers and the prover flowcomputers are connected to the duty and standby supervisories by a unshielded twisted pair Ethernet link. This link forms one part of the dual data highway.

51 ,71

The second part of the dual data highway is provided in the form of two RS 485 serial buses using Modbus protocol which connects all computers in addition to the Ethernet link above.

51 $"

The prover computer is connected to the two condensate stream flowcomputer via a RS 485 serial link using Modbus protocol. This link is used for proving purposes only.

51, $

The Modicon PLC is connected to each of the supervisory P.C.s via an RS 232 serial data link. The protocol used will be Modbus.

511 2+2

The chromatograph is connected directly to each of the gas export metering system flowcomputers using RS 232 serial links running Modbus protocol. A fourth serial link using Modbus protocol and an RS 485 interface is used to connect the chromatograph controller to the supervisory computers. Gas composition data is passed from the supervisory computer to the back up gas stream and the buy back flowcomputer.

515 $

The supervisory computers are connected to the report printer via an automatic printer switch. Only the duty supervisory will access the printer. The interface used is parallel.

The alarm printer is connected to the supervisory computer via an automatic printer switch. Only the duty supervisory will access the printer. The interface used is serial, 9600 baud, eight data bits, one stop bit no parity check. Each S600 flowcomputer is configured to provide a serial port connection for printing alarms and report data.

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516

Two serial data links are provided to the DCS, (one from each supervisory). The interface is RS 232 and the protocol is Modbus. This link shall be used to supply metering data to the DCS and also accept downloading of gas composition from lab analysis.

517 %')+

Each of the flowcomputers is configured with a serial port for local printing. If required a local printer will need to be connected to this port and the following reports may be generated from the computer front panel:

Daily Report

Current Report

Constants Log

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55

The stream status is determined by the flowcomputer and may be any one of the following: Status Description

UNDEFINED The status task is not running correctly.

MAINT The flowcomputer has been put into Maintenance Mode

DISABLED The stream disable logic has been set by the Supervisory computer

VLV-ILLEGAL One of the monitored valves is indicating an unknown/illegal position

UNHEALTHY (CONDENSATE STREAM)

There is not a flow path through the meter run AND the measured Gross volume flowrate is above the low flow cut-off limit (m3/h)

ON-LINE (CONDENSATE STREAM)

There is a flowpath through the meter run AND the measured Gross volume flowrate is above the low flow cut-off limit (m3/h)

UNHEALTHY (GAS STREAM)

There is not a flowpath through the meter run AND the measured Mass flowrate is above the low flow cut-off limit (t/h)

ON-LINE (GAS STREAM)

There is a flowpath through the meter run AND the measured Mass flowrate is above the low flow cut-off limit (t/h)

OFF-LINE There is not a flow path through the meter run AND the measured Gross volume flowrate is below the low flow cut-off limit.

56 --

The flowcomputer should be put into Maintenance Mode when calculation or calibration tests are to be carried out. Entry of Maintenance Mode is only possible if the stream status is Off-Line and one of the inlet valves is closed.. The flowcomputer does not check the status of the outlet valves for maintenance entry / exit. To Exit Maintenance Mode the Off-Line interlock checks must be satisfied. Whilst in Maintenance Mode the following occurs:

1. Alarm digital outputs (except Watchdog) are forced to the no alarm position. 2. Totalisation pulse outputs are inhibited.

3. Analogue outputs are set to the low limit value.

4. Any flow registered is totalised into separate maintenance totalisers.

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57 ##

57 $

Unauthorised changing of data is prevented using a multiple level security system. Each login level has a separate password. Each login level can change its own password, and the passwords for all lower levels. Permissions are:

User Level

User name Access Level Default Password

0 Secure Display selection and login. 1 Operator Display selection and login. Change limits, keypad values,

stream commands. Accept alarms oper

2 Technician As Operator + change scalings tech 3 Engineer As Technician + edit databases, reports, and displays engr 8 System Alderley password level

:

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59 '

59 '

During normal metering the Supervisory polls totals from each S600 flowcomputer. The supervisory calculates the difference between the total received on the previous poll and the total received on current poll, and adds that amount to its own version of the stream total.

Supervisory cumulative totals roll over from 99,999,999 to 0.

Stream and station totals are formed on a cumulative and daily basis. Daily totals for each flowcomputer are formed independently at the flowcomputer and supervisory computers. The supervisory reports its own versions of daily totals.

59 '#

Totals in the flowcomputers are stored in battery supported static RAM ensuring they remain unchanged during power failure. The supervisory totals are stored on the hard drive and remain unchanged during power failure.

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5: +

Each S600 flowcomputer has a set of Flash containing the core software. The core software consists of a number of programme modules, each able to perform a particular function - for example, alarm handling. A particular application is realised by selecting the relevant programme modules, and setting them up to suit the users requirements.

The S600 configuration determines the selection and set-up of modules for a particular application. Each S600 stores its configuration as a set of files in an area of memory set up as a RAM disc. An internal battery supports the RAM disc power, so that data is not lost even if the main S600 power is interrupted.

Constants are user-entered values such as transmitter ranges. They are also stored in the RAM disc.

5 '

Each S600 independently raises alarms for its own internal condition and inputs. The Supervisory computer collects together all flowcomputer alarms to form a single display for the PC, and for printing. Alarms are grouped as follows:

Group Description System Internal failure of a computer/transmitter Input An input is failed Process An input or variable is outside entered limits

Alarms are automatically accepted at the flowcomputer on transfer to the supervisory.

5 %') '#

5

The Flowcomputer operates a comprehensive alarm system, a summary of which is detailed below:

1. Visual Indication Front Panel Display An alarm indicator LED on the front panel is used to indicate alarm status, as detailed below:

Flashing red - unaccepted alarm is present Constant red - alarm condition is present, however has been accepted Constant green - no alarms present Flashing amber - communications failure to front panel

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2. Alarm Output One off relay output, and two open collector digital outputs are used to indicate alarm status. A number of alarms are assigned to each of these outputs. If an alarm digital output is in the alarm state when another alarm assigned to that output occurs, the digital output will drop to the non-alarm state for approximately 0.5 seconds in order to enable annunciation of the additional alarm. A latching method is employed which operates as defined below:

NO ALARM Alarm output remains unset Alarm indicator shows no alarm ALARM OCCURS Alarm output is set Alarm indicator shows unaccepted alarm ALARM IS STILL PRESENT AND IS ACCEPTED

Alarm output remains set Alarm indicator shows accepted alarm

Printout of alarm ACC ALARM CLEARS PRIOR TO ACCEPTANCE

Alarm output remains set Alarm indicator shows unaccepted alarm

ALARM ACCEPTED FOLLOWING CLEARANCE Alarm output is unset Alarm indicator shows no alarm

Printout of alarm ACC Printout of Alarm CLR ALARM CLEARS FOLLOWING ACCEPTANCE

Alarm output is unset Alarm indicator shows no alarm

Printout of alarm CLR ALARM OCCURS HAVING ALREADY BEEN RAISED AND CLEARED WITHOUT ACCEPTANCE

Alarm output remains set Alarm indicator shows unaccepted alarm

5 '

Alarms designated as process alarms are inhibited under the following conditions:

Flowcomputer is in Maintenance mode Flowrate is below low flow cut-off value.

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5 '#

The display of units and their formats throughout the system, Operator workstation, Reports and Flow computers shall be as listed in the following table:

Parameter Units Normal Format

Line Temperature C 12.12 Base / Calibration Temperature C 12.12 Temperature Limits and Scaling C 12

Line Pressure barg 12.123 Base Pressure Bar 1.12345

Pressure Limits and Scaling barg 12 Differential Pressure mBar 123.123

Differential Pressure Limits and Scaling mBar 123 Differential Pressure switch points % 12

Vapour Pressure barg 123.123 Time - HH:MM:SS Date - DD/MM/YY

Density (Condensate) kg/m3 123.123 Density Limits (Gas & Condensate) kg/m3 123

Base Density (Condensate) kg/Sm3 123.123 Density (Gas) kg/m3 123.123

Base Density (Gas) kg/Sm3 1.123456 Gas Composition mol% 123.1234

Ctlm 1.1234567 Cplm 1.1234567 Ctld 1.1234567 Cpld 1.1234567

Alpha Exponent Beta Exponent

Meter Frequency Hz 1234.1 Low Flow Cut off Hz 12

K Factor Pls/ m3 1234.123 Meter Factor 1.123456

Prover Final K Factor Pls/ m3 1234.1234 Volume Flow Rate m3 /h 1234.123

Volume Total m3 123456789.123 Volume Flow Rate Limits m3 /h 1234

Std Volume Flow Rate Skm3 /h 1234.123 Std Volume Total Skm3 123456789.123 Std Volume Total bbl 123456789.123 Mass Flow Rate t /h 1234.123

Mass Total tonnes 123456789.123 Energy Flow Rate GJ/h 1234.123

Energy Total GJ 123456789.123 Energy Total MBTU 123456789.123

Discharge Coefficient 1.1234567 Velocity of Approach 1.1234567

Expansibility 1.1234567 Isentropic Exponent 1.1234 Reynolds Number Exponent

Orifice Thermal Expansion / C Exponent Pipe Thermal Expansion / C Exponent

Timeouts s 123 Pipe / Orifice / Prover Dimensions mm 123.123

Corrected Pipe Diameter mm 123.12345 Corrected Orifice Diameter mm 123.12345

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Ctlp 1.1234567 Cplp 1.1234567 Ctsp 1.1234567 Cpsp 1.1234567

Modulus of Steel /bar Exponent Thermal expansion / C Exponent

Base Prover Volume m3 1.1234567 Corrected Prover Volume m3 1.1234567

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6 - %.-$

The flow computers are Daniel model S600 (General arrangement appended). 6 /'%

The S600 stream computers are factory configured to provide all the measurement functions for the Helang liquid turbine meter application.

6 !-$'+

Two pulse inputs are provided for liquid turbine meter applications. They will be configured to provide dual pulse security checks to IP252, 1976 level A. This entails comparing the two pulse trains from the turbine meter pulse amplifiers which are normally 90 electrical degrees out of phase. If the pulse trains are in-phase an alarm will be raised and the pulses rejected. The normal ordering of the pulse trains is ABABAB and all correct AB pairs are counted in the Good Pulse Counter (H/W). If a missing pulse is detected e.g. ABBABA this is separately counted in the Bad Pulse Counter (H/W). If the flowrate is above the Low Flow Limit then the Bad Pulse Counter (1) will be incremented. If the flowrate is below the Low Flow Limit the Bad Pulse Counter (1) will not be incremented, unless configured for no low flow cut-off operation. The Bad Pulse Counter (1) will be compared against a keypad entered Bad Pulse Threshold and if this is exceeded, an alarm will be raised and Bad Pulse Counter(2) incremented. The increments to the Bad Pulse Counter (2) may also be configured as a pulse output to an external counter. The Bad Pulse Counter (1) will be reset to zero under the following conditions:

Acceptance of the alarm.

After 10000 good pulses. (This minimises raising nuisance alarms due to occasional bad pulses at flow start/stop eventually causing the threshold to be exceeded.)

The Bad Pulse Counter (2) will be held as a non-reset triplicated register.

6 -%

The Condensate flowcomputers will be configured to perform Meter Factor linearistaion using 10 entered values of Meter Factors and flowrates. This will comprise a two-stage system. The S600 will perform the linearisation and the results will be made available at the supervisory. The results will graphically display the curves and the operator can then decide to download the new meter factors to the stream. The table will be downloaded to the particular flowcomputer and displayed as a graph. The results of up to 16 single point proves (meter factor, flowrate and date) will be displayed on the same display. In the event of a prove result not matching the existing curve, the operator can elect to copy values from the prove result into the table to form a new curve and download the values to the flowcomputer. The values will be downloaded from the supervisory computer after a series of prove runs.

6 #('+

The density in use is from one of three sources:- Density A measured Density B measured Density Fallback - an operator entered fixed value. Each computer accepts pulse inputs from two Solartron densitometers situated on the header. A set of calibration constants for each densitometer is entered into each flowcomputer in order that measured density may be calculated. Using the live temperature and pressure inputs the measured density is corrected for temperature and pressure at the densitometer. Live density A is normally selected for use in the calculations; if the density A fails then the live density B is selected for use. If both density inputs are failed then the fallback density is selected for use. The two densities

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are checked for a difference in reading and if the difference exceeds a keypad entered limit then a discrepancy alarm is raised. The density temperature is compared with the line temperature and if the difference exceeds a keypad entered limit then an alarm is raised The selected measured density is then used in conjunction with the thermal expansion coefficient, the condensate compressibility and the liquid temperature and pressure correction factors to calculate the density at standard conditions. The calculated base density is now corrected for line temperature and pressure conditions to produce the density at the meter.

6, )%*#;

A low flow cut-off point is provided for entry of a frequency in Hz. When the turbine meter input frequency exceeds this figure, dual pulse checking, flowrate and calculation will be performed - this is the normal metering condition. When a turbine frequency is detected below the low flow cut-off, a low flow cut-off alarm will be raised, IP 252/76 pulse checking and flowrate calculations are inhibited. Totalisation is performed at all times.

61 '"('+

The condensate system has duplicated valves at the inlet, outlet and prover inlet positions. All valve statuses are wired in to the flowcomputer.

65 '')

Flowrates will be calculated and totals formed for the following

Flowrate Resolution Total Resolution Mass t/h xxxxxxx.xxx t xxxxxxxx.xxx Gross Volume m3/h xxxxxxxx.xxx m3 xxxxxxxx.xxx Std Volume Skm3/h xxxxxxxx.xxx Skm3 xxxxxxxx.xxx

66 "+?-0-'%')

The average standard volume flowrate for the condensate will be computed on a daily basis and printed on the daily report. The Minimum and Maximum values of standard volume flowrate will be captured on a daily basis and printed on the daily report.

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67 '$+

The following printout facilities are available:

Configuration: Constants log report on request. A display dump is printed on request. A print out of all possible alarms and their configured alarm group.

Reports: Day end report is printed automatically at day end, or on request. Current report is printed on request.

Alarms: Automatic alarm printouts on occurrence, acceptance and clearance of alarm states. Automatic status printouts on occurrence of a keypad value or mode change. All current alarms on request

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6 %

The functions of the stream flowcomputers are:-

To accept a dual pulse stream representing gross volume flowrate from the turbine meter.

To detect pulse errors in accordance with IP252/76; to count these errors, to raise an alarm on reaching a settable alarm threshold

To correct pulse errors according to IP252/76 level A.

To accept an analogue input representing line pressure and to convert the reading to engineering units for display and calculation.

To accept a 4 wire P.R.T. input representing line temperature and to convert the reading to engineering units for display and calculations.

To accept a 4-20mA input from the sample loop representing density temperature and to convert the reading to engineering units for display and calculation.

To accept a 4-20mA input from the sample loop representing density pressure and to convert the reading to engineering units for display and calculation.

To accept two frequency input signals representing density and to accept densitometer constants and hence calculate line density and mass flowrate and totals.

To allow a densitometer to be selected for use and to provide automatic switching to the second densitometer in the case of failure.

To provide an analogue (4-20mA) output to the flow control valve.

To provide an analogue (4-20mA) output to the sample loop flow controller.

To provide a digital output to the sample loop flow controller to represent an on-line condition.

To perform calculations as defined in the calculation section.

To display measured and calculated quantities.

To provide a means of operator data entry and inspection.

To accept digital inputs from the each of the inlet block valves and to interpret these signals to represent the valve status as open, closed, moving or failed.

To accept digital inputs from the outlet block valves and to interpret these signals to represent the valve status as open, closed, moving or failed.

To accept digital inputs from the prover inlet block valves and to interpret these signals to represent the valve status as open, closed, moving or failed.

To accept a digital signals from each valve to indicate Local / Remote status.

To issue open and close commands to the inlet, outlet, and prover inlet block valves.

To accept a digital signal representing strainer blocked and to raise an alarm when this signal is open. .

To communicate with the supervisory computers via a UTP ethernet link to allow bi-directional transfer of measured and calculated data, alarms, status and configuration.

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To communicate with each supervisory computer via two RS485 serial links to allow bi-directional transfer of measured and calculated data, alarms, status and configuration.

To provide a digital output representing computer fail.

To provide a pulse output representing good pulses to the prover computer

To store for one month, daily totals, hourly totals and average values of K factor,meter factor, pressure, temperature and density.

To provide an RS 232 serial port for printing reports.

To calculate flow weighted average values for Presssure, Temperature, Meter Density and Base Density against volume flow on a aperiod and daily basis.

To perform meter factor linearisation based on 10 enetered values of meter factor and flowrates.

To accept meter factor curve downloaded from the supervisory.

To calculate the average, minimum and maximum values for standard volume flowrate on a daily basis.

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6 @

The following inputs and outputs will be selected for each stream flowcomputer for this project during configuration.

S600 Conn DPin I/O Description Stm 1 Stm 2 A 1 DAC 1 +ve Flow Control Valve FV 3211 FV 3221

A 14 DAC 1 ve Flow Control Valve FV 3211 FV 3221

A 15 DAC 2 +ve Sample Loop Flow Cont

A 3 DAC 2 ve Sample Loop Flow Cont

A 8 ADC 1 +ve Mtr Pressure PT 3211 PT 3221

A 11 ADC 6 +ve Density Pressure PT 3201 PT 3201

A 24 ADC 7 +ve Density Temperature TE 3201 TE 3201

A 22 ADC 4 +ve Prover V/V1 L/R * MOV 3213 MOV 3223

A 10 ADC 5 +ve Prover V/V 2 L/R * MOV 3214 MOV 3224

A 9 ADC 3 +ve Strainer Blocked * PDISH 3212 PDISH 3222

B 4 PRT 1 I + Mtr Temp TE 3211 TE 3221

B 1 PRT 1 V + Mtr Temp TE 3211 TE 3221

B 21 PRT 1 V - Mtr Temp TE 3211 TE 3221

B 24 PRT 1 I - Mtr Temp TE 3211 TE 3221

B 9 Density 1 +ve Density 1 QT 3201 QT 3201

B 27 Density 1 -ve Density 1 QT 3201 QT 3201

B 10 Density 2 +ve Density 2 QT 3202 QT 3202

B 28 Density 2 -ve Density 2 QT 3202 QT 3202

B 13 Dig In 1 ve Inlet V/V 1 Open MOV 3211 MOV 3221

B 14 Dig In 2 ve Inlet V/V 1 Closed MOV 3211 MOV 3221

B 15 Dig In 3 ve Inlet V/V 1 L/R MOV 3211 MOV 3221

B 16 Dig In 4 ve Inlet V/V 2 Open MOV 3212 MOV 3222

B 17 Dig In 1-4 +ve Common

B 18 Dig 5 ve Inlet V/V 2 Closed MOV 3212 MOV 3222

B 19 Dig In 6 ve Inlet V/V 2 L/R MOV 3212 MOV 3222

C 19 Dig In 7 ve Outlet V/V 1 Open MOV 3215 MOV 3225

C 18 Dig 8 ve Outlet V/V 1 Closed MOV 3215 MOV 3225

C 17 Dig In 5-8 +ve Common

C 16 Dig In 9 ve Outlet V/V 1 L/R MOV 3215 MOV 3225

C 15 Dig In 10 ve Outlet V/V 2 Open MOV 3216 MOV 3226

C 14 Dig In 11 ve Outlet V/V 2 Closed MOV 3216 MOV 3226

C 13 Dig In12 ve Outlet V/V 2 L/R MOV 3216 MOV 3226

C 12 DigIn 9-12 +ve Common

C 11 Dig In 13 ve Prover V/V 1 Open MOV 3213 MOV 3223

C 10 Dig In 14 ve Prover V/V 1 Closed MOV 3213 MOV 3223

C 9 Dig In 15 ve Prover V/V 2 Open MOV 3214 MOV 3224

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C 8 Dig In16 ve Prover V/V 2 Closed MOV 3214 MOV 3224

C 7 DigIn 13-16 +ve Common

C 36 Dig Out 1+ve In V/V 1 Open Com MOV 3211 MOV 3221

C 37 Dig Out 2 +ve In V/V 1 Close Com MOV 3211 MOV 3221

C 37 Dig Out 3+ve In V/V 2 Open Com MOV 3212 MOV 3222

C 36 Dig Out 4 +ve In V/V 2 Close Com MOV 3212 MOV 3222

C 35 Dig Out 1-4 -ve Command Common

C 34 Dig Out 5+ve Out V/V 1 Open Com MOV 3215 MOV 3225

C 33 Dig Out 6+ve Out V/V 1 Close Com MOV 3215 MOV 3225

C 32 Dig Out 7+ve Out V/V 2 Open Com MOV 3216 MOV 3226

C 31 Dig Out 8+ve Out V/V 2 Close Com MOV 3216 MOV 3226


C 29 Dig Out 9+ve Prv V/V 1 Open Com MOV 3213 MOV 3223

C 28 Dig Out 10+ve Prv V/V 1 Close Com MOV 3213 MOV 3223

C 27 Dig Out 11+ve Prv V/V 2 Open Com MOV 3214 MOV 3224

C 26 Dig Out 12+ve Prv V/V 2 Close Com MOV 3214 MOV 3224


C 4 Pulse 1 in + Turbine A + FT 3211A FT 3221A

C 23 Pulse 1 in - Turbine A - FT 3211A FT 3221A

C 3 Pulse 2 in + Turbine B + FT 3211B FT 3221B

C 22 Pulse 2 in - Turbine B - FT 3211B FT 3221B

C 24 Pulse Out + Prover Pulse Bus

C 5 Pulse Out - Prover Pulse Bus RJ 45 Network 1 Signal ground Supervisory Computer

2 DTR Supervisory Computer

3 RTS Supervisory Computer

4 Tx Data Supervisory Computer

5 Rx Data Supervisory Computer

6 CTS Supervisory Computer

7 DSR Supervisory Computer

8 DCD Supervisory Computer

RJ 45 Port 3 1 Signal ground Local Printer

4 Tx Data Local Printer

5 Rx Data Local Printer

TB2 Port 5 1 Rx - Prover Slave

2 Rx + Prover Slave

3 Tx - Prover Slave

4 Tx + Prover Slave

TB2 port 6 5 Rx - Supervisory ComputerA

6 Rx + Supervisory ComputerA

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7 Tx - Supervisory ComputerA

8 Tx + Supervisory ComputerA

TB2 port 7 9 Rx - Supervisory ComputerB

10 Rx + Supervisory ComputerB

11 Tx - Supervisory ComputerB

12 Tx + Supervisory ComputerB

TB 1 1 24 Volt DC +ve 24 V DC Power

TB 1 2 24 Volt DC -ve 0 V DC Power

TB 1 6 N /C Contact Computer Fail Relay

TB 1 7 Common Contact Computer Fail Relay

TB 1 8 N/O Contact Computer Fail Relay

Note: ADCs 3, 4 and 5 are used to monitor digital inputs. This is achieved by connecting the digital input through a fixed resistor in the panel, if the current detected by the ADC is above 4 mA then the digital input is closed. Conversely when the current detected by the ADC is less than 3.5 mA the input is open circuit.

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6, ''

6, !!"''

Symbol Description AT Area of the rotor (m) CPLd correction factor for the effect of pressure on the liquid CPLm correction factor for the effect of pressure on the liquid CPSm Correction factor for the effects of pressure on the meter housing CTLd Correction factor for the effects of temperature at densitometer on the liquid CTLm Correction factor for the effects of temperature at the meter on the liquid CTSm Correction factor for the effects of temperature on the meter housing D15.0 Density at standard conditions (15C, zero barg) DI uncorrected measured density DT measured density corrected for temperature DTP measured density corrected for temperature and pressure e Poisson ratio E Youngs modulus of elasticity for the material of the spool body f turbine meter frequency (Hz) FWV Flow weighted value K K.Factor (pls/m3) K0, - K21B are densitometer calibration constants K0, K1 are liquid specific constants K2 liquid specific constant (/C) LinMeter Linear temperature expansion coefficient for the material of the meter housing

(/C) LinRotor Linear temperature expansion coefficient for the material of the meter housing

(/C) MF Meter factor PCAL Meter calibration pressure (barG) Pcal densitometer calibration pressure in barG Pd pressure of the liquid at the densitometer (barG) Pe liquid equilibrium vapour pressure (barG) Pm pressure of the liquid at the meter (barG) PV Process variable qm mass flowrate (t/h) Qm Mass total t Qs Standard volume total Skm3 qv actual volume flowrate (m3/h) qvstd standard volume flowrate (Skm3/h) R Radius of meter housing (m) RHOden Raw density measured at densitometer RHOm meter density (kg/m3) RHOstd density corrected to standard conditions (kg/m3) Strain Pressure expansion coefficient for the material of the spool body.(/barG) t Thickness of meter housing (m) Tau period of the signal from the densitometer (micro-seconds) TCAL Meter calibration temperature (C) Tcal densitometer calibration temperature C Td temperature of the liquid at the densitometer (C) Tm Temperature of the liquid at the meter (C) Tstd Standard temperature (15C) VCFm meter volume correction factor pls number of pulses from the turbine meter in the sample period

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Qm mass total increment Qv gross observed volume increment (m3) Qvstd standard volume increment (m3) Coefficient of thermal expansion of the liquid (/C) d compressibility of the liquid at the densitometer (/bar) m compressibility of the liquid at the meter (/bar) X Turbine meter flowrate Xp Flowrate co-ordinate from linearisation table Yp Meter factor co-ordinate from linearisation table

6, 4

The following base conditions are used in the calculations:

Constant Value Units Base Temperature 15 C Base Pressure 0 bar g Calibration temperature 20 C

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6, "%

Detailed below are the default conversion factors: barG to barA

X barA = Y barG + 1.01325

bar to Pa X Pa = Y bar x 100000

degC to Kelvin X K = Y degC + 273.15

6,, '''

Gross Observed Volume Total Increment (m3) CPSmCTSmMF

KplsQv =

CTSm and CPSm have keypad values of 1.0 and hence are not used when the mode of these items = Keypad

Standard Volume Total Increment (m3)

VCFmQvQvstd =

Mass Total Increment (t)

001.0= mRHOQvQm

6,1 %')''

Gross Volume Flowrate (m3/h) CPSmCTSmMF

Kfqv = 3600

CTSm and CPSm have keypad values of 1.0 and hence are not used when the mode of these items = Keypad Standard Volume Flowrate (Skm3/h)

VCFmqvqvstd =

Mass Flowrate (t/h)

001.0= RHOmqvqm

6,5 -#

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DI = K0 + K1 Tau + K2 Tau2 DT = DI ( 1+ K18 ( Td -Tcal )) + K19 ( Td -Tcal ) K20 = K20A + K20B (Pd - Pcal ) K21 = K21A + K21B (Pd - Pcal ) DTP = DT [1 + K20 (Pd - Pcal ) ] + K21(Pd - Pcal )

6,6 %22*

a) At the Meter: CTLm = EXP [- (Tm - Tstd) (1.0 + 0.8 (T - Tstd))]

b) At the Densitometer: CTLd = EXP [- (Td - Tstd) (1.0 + 0.8 (Td - Tstd))]

Coefficient of Thermal Expansion of the Liquid (/degC) The coefficient of thermal expansion for the liquid is calculated from the following equation

( ) 210

2 KRHOK

RHOK

stdstd

++=

6,7 %2$2*

a) At the Meter: CPLm = 1

1 m(Pm Pe)

b) At the Densitometer:

)(11

PePddCPLd

=

Compressibility (/bar) This is calculated: a) at thedensitometer

( ) ( )

( ) ( )4-

23-23-

4-23-23-

10 10

T 0042092.010

0.87096 + T x 0.00021592 + 1.62080- =

:Meter b)At the

10 10

T 0042092.010

0.87096 + T x 0.00021592 + 1.62080- =

xx

x

xEXP

xx

x

xEXP

std

m

stdmm

std

d

stdd

d

+

+

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6,9 $'- (+0

The spool itself will expand and contract due to the effects of both temperature and pressure, both internally and externally, on the spool material. This correction is dependent upon the calibration conditions under which the meter was calibrated and upon the composition of the material used to fabricate the spool. The equations used for correction are described below.

( ){ }[ ] ( ){ }[ ]CALLCALL TTLinRotorTTLinMeterCTSm ++= 11 2

( ){ }CALm PPStrainCPSm += .1

( )[ ]

=

tRATEReStrain

2./1..2.2

2pi

Note:

If this correction is not required then the mode of CTSm/CPSm should be set to keypad with a keypad value of 1.0. If the correction is required then the mode of CTSm and CPSm should be set to Calculated, and the calibration Temperature and Pressure will be updated after each prove, i.e. with the value of proved meter temperature and proved meter pressure.

Density Correction Standard Density (kg/m3)

CPLdCTLdRHORHO denstd

=

RHOstd density corrected to standard conditions (kg/m3) CTLd correction factor for the effect of temperature on the liquid at the densitometer; CPLd correction factor for the effect of pressure on the liquid at the densitometer; RHOden measured density, at the densitometer (kg/m3)

Meter Density (kg/m3)

RHOm= RHOstd x VCFm

RHOm Meter density (kg/m3). RHOstd density corrected to standard conditions (kg/Sm3) VCFm Volume correction factor for the fluid at the meter

Volume Correction Factor

VCFm = CTLm x CPLm

CTLm correction factor for the effect of temperature on the liquid at the meter CPLm correction factor for the effect of pressure on the liquid at the meter

Alderley Controls



6,: %').+2 "+

Flow weighted averages are calculated on a period and daily basis for: Stream Temperature Stream Pressure Meter Density Base Density

The flow weighted average is calculated by

( )

=

v

v

QQPV

FWV

6, -%

( )( )( )

( ) pppppp

calc Ylower + Xlower - Xhigher Ylower - Yhigher Xlower - X

= MF

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61 '#

The following is representative of the data that will be available as a minimum on the front panel of the flow computer. The actual displays will be included when configuration of the computers is completed

Display Item Parameters Security Units

Mass Total Cumulative, daily 0 tonne Mass Flowrate 0 kg/hour Std Vol Total Cumulative, daily 0 Sm3 Std Vol Flowrate 0 Sm3/hour Gross Volume Total Cumulative, daily 0 m3/h Gross Volume Flowrate 0 m3/h Stream Pressure Measured, keypad 0,1 Barg Stream Temperature Measured, keypad 0,1 oC K-Factors 1-8 Keypad 2 pls/m3 Flowrates 1-8 Keypad 2 m3/h K Factor in use Calculated 0 pls/m3 API constants K0,K1 2 Meter Beta Calculated 0 /bar Densitometer Beta Calculated 0 /bar Alpha at base conditions Calculated 0 Cpl at meter Calculated 0 Cpl at Densitometer Calculated 0 Ctl at meter Calculated 0 Ctl at Densitometer Calculated 0 Line Density Calculated, keypad 0 kg/m3 Standard Density Calculated, keypad 0,1 kg/m3 Inlet Valves Open, closed, moving, failed 0 Outlet Valves Open, closed, moving, failed 0 Prover Valves Open, closed, moving, failed 0 Outlet Valves Open, closed, moving, failed 0 Time hh:mm 2 Date dd/mm/yyyy 2 Maint Mode Entry/Exit 2 Security various Diagnostics various Software Version various

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65 '

The following table lists the alarms raised on the Condensate stream computers.

S600 SYS HOST COLD ST Grp 1 S600 SYS HOST WARM ST Grp 1 S600 SYS HOST BATT FAIL Grp 1 S600 SYS HOST RAM FAIL Grp 1 S600 SYS HOST ROM FAIL Grp 1 S600 SYS HOST RESET Grp 1 S600 SYS HOST TOT RES Grp 1 S600 SYS HOST TOT PART Grp 1 S600 SYS HOST TOT CORR Grp 1 S600 SYS HOST CONF CSUM Grp 1 S600 SYS HOST TOT ROLL OVR Grp 1 S600 SYS HOST TOT ROLL UDR Grp 1 S600 SYS HOST PRINTING ERR Grp 1 S600 PROVER SLAVE LINK MONITOR Grp 3 S600 SLAVE LINK MONITOR Grp 4 S600 PRINTER MONITOR Grp 4 S600 BKGND TASK MONITOR Grp 4 S600 BKGND TASK TSK ERR Grp 4 S600 DIO SCAN TASK MONITOR Grp 4 S600 DIO SCAN TASK TSK ERR Grp 4 S600 DISPLAY TASK MONITOR Grp 4 S600 DISPLAY TASK TSK ERR Grp 4 S600 IO COMMS TASK MONITOR Grp 4 S600 IO COMMS TASK FAIL IO1 Grp 4 S600 IO COMMS TASK FAIL IO2 Grp 4 S600 IO COMMS TASK FAIL IO3 Grp 4 S600 IO COMMS TASK FAIL IO4 Grp 4 S600 IO COMMS TASK FAIL IO5 Grp 4 S600 IO COMMS TASK FAIL IO6 Grp 4 S600 IO COMMS TASK FAIL IO7 Grp 4 S600 IO COMMS TASK TSK ERR Grp 4 S600 IO SCAN TASK MONITOR Grp 4 S600 IO SCAN TASK TSK ERR Grp 4 S600 REPORTS TASK MONITOR Grp 4 S600 REPORTS TASK TSK ERR Grp 4 S600 TOTALS TASK MONITOR Grp 4 S600 TOTALS TASK TSK ERR Grp 4 S600 LIQ KF/MF TASK MONITOR Grp 4 S600 LIQ KF/MF TASK TSK ERR Grp 4 S600 LIQ M CORR TASK MONITOR Grp 4 S600 LIQ M CORR TASK TSK ERR Grp 4 S600 LIQ LIQ CON TASK MONITOR Grp 4 S600 LIQ LIQ CON TASK TSK ERR Grp 4 S600 LIQ TURB TASK MONITOR Grp 4 S600 LIQ TURB TASK TSK ERR Grp 4 S600 LIQ VOL CORR TASK MONITOR Grp 4 S600 LIQ VOL CORR TASK TSK ERR Grp 4 S600 PRV SEQ TASK MONITOR Grp 4 S600 PRV SEQ TASK TSK ERR Grp 4 S600 PRV BIDI TASK MONITOR Grp 4 S600 PRV BIDI TASK TSK ERR Grp 4 S600 DENSITY TASK MONITOR Grp 4 S600 DENSITY TASK TSK ERR Grp 4

Alderley Controls



S600 STR STATUS TASK MONITOR Grp 4 S600 STR STATUS TASK TSK ERR Grp 4 S600 FWA CALC TASK MONITOR Grp 4 S600 FWA CALC TASK TSK ERR Grp 4 S600 BVM TASK MONITOR Grp 4 S600 BVM TASK TSK ERR Grp 4 S600 STN AVE TASK MONITOR Grp 4 S600 STN AVE TASK TSK ERR Grp 4 S600 DISCREP TASK MONITOR Grp 4 S600 DISCREP TASK TSK ERR Grp 4 S600 CALC TASK MONITOR Grp 4 S600 CALC TASK TSK ERR Grp 4 S600 PID CTL TASK MONITOR Grp 4 S600 PID CTL TASK TSK ERR Grp 4 S600 ALM SUPPRESS TASK MONITOR Grp 4 S600 ALM SUPPRESS TASK TSK ERR Grp 4 S600 BATCH/FSW TASK MONITOR Grp 4 S600 BATCH/FSW TASK TSK ERR Grp 4 S600 LOGICALC TASK MONITOR Grp 4 S600 LOGICALC TASK TSK ERR Grp 4 S600 LIQ COR IO TASK MONITOR Grp 4 S600 LIQ COR IO TASK TSK ERR Grp 4 S600 LIQ COR IF TASK MONITOR Grp 4 S600 LIQ COR IF TASK TSK ERR Grp 4 S600 LIQ COR FLOW TASK MONITOR Grp 4 S600 LIQ COR FLOW TASK TSK ERR Grp 4 S600 PRV CPRV TASK MONITOR Grp 4 S600 PRV CPRV TASK TSK ERR Grp 4 S600 FAULT TASK MONITOR Grp 4 S600 FAULT TASK TSK ERR Grp 4 S600 FLOWTIME TASK MONITOR Grp 4 S600 FLOWTIME TASK TSK ERR Grp 4 S600 SGERG TASK MONITOR Grp 4 S600 SGERG TASK TSK ERR Grp 4 S600 PRV MMPRV TASK MONITOR Grp 4 S600 PRV MMPRV TASK TSK ERR Grp 4 S600 ADC 01 MTR PRS L Grp 2 S600 ADC 01 MTR PRS H Grp 2 S600 ADC 01 MTR PRS DEV ERR Grp 3 S600 ADC 06 DNS PRS L Grp 2 S600 ADC 06 DNS PRS H Grp 2 S600 ADC 06 DNS PRS DEV ERR Grp 3 S600 ADC 07 DNS TMP L Grp 2 S600 ADC 07 DNS TMP H Grp 2 S600 ADC 07 DNS TMP DEV ERR Grp 3 S600 DAC 02 SAMP LOOP DEV ERR Grp 4 S600 FREQ 01 DNS A DEV ERR Grp 2 S600 FREQ 02 DNS B DEV ERR Grp 2 S600 PRT 01 MTR TMP L Grp 2 S600 PRT 01 MTR TMP H Grp 2 S600 PRT 01 MTR TMP DEV ERR Grp 3 S600 PIP 01 TURBINE BAD PULSE Grp 2 S600 PIP 01 TURBINE LINE FAIL Grp 2 S600 POP 01 OVERFLOW Grp 4 S600 POP 01 DEV ERR Grp 4 S600 POP 02 OVERFLOW Grp 4 S600 POP 02 DEV ERR Grp 4

Alderley Controls



S600 POP 03 OVERFLOW Grp 4 S600 POP 03 DEV ERR Grp 4 S600 POP 04 OVERFLOW Grp 4 S600 POP 04 DEV ERR Grp 4 S600 POP 05 OVERFLOW Grp 4 S600 POP 05 DEV ERR Grp 4 S600 STATUS RAM FAIL Grp 4 S600 STATUS ROM FAIL Grp 4 S600 STATUS PIC FAIL Grp 4 S600 STATUS TPU FAIL Grp 4 S600 STATUS EEPROM FAIL Grp 4 S600 STATUS TASK ERR Grp 4 S600 STATUS CONF ERR Grp 4 S600 STATUS TASK FAIL Grp 4 S600 STATUS WARM ST Grp 4 S600 STATUS DEV ERR Grp 4 S600 STR01 IP2 CALC CONF ERR Grp 4 S600 STR01 IP2 CALC I/P ERR Grp 4 S600 STR01 IP2 CALC O/P ERR Grp 4 S600 STR01 IP2 CALC CALC FAIL Grp 4 S600 STR01 IP2 CALC NO PERMIT Grp 4 S600 STR01 STATUS CALC CONF ERR Grp 4 S600 STR01 STATUS CALC I/P ERR Grp 4 S600 STR01 STATUS CALC O/P ERR Grp 4 S600 STR01 STATUS CALC CALC FAIL Grp 4 S600 STR01 STATUS CALC NO PERMIT Grp 4 S600 STR01 PLS COND CALC CONF ERR Grp 4 S600 STR01 PLS COND CALC I/P ERR Grp 4 S600 STR01 PLS COND CALC O/P ERR Grp 4 S600 STR01 PLS COND CALC CALC FAIL Grp 4 S600 STR01 PLS COND CALC NO PERMIT Grp 4 S600 STR01 TURB INC CALC CONF ERR Grp 4 S600 STR01 TURB INC CALC I/P ERR Grp 4 S600 STR01 TURB INC CALC O/P ERR Grp 4 S600 STR01 TURB INC CALC CALC FAIL Grp 4 S600 STR01 TURB INC CALC NO PERMIT Grp 4 S600 STR01 MAINT CALC CONF ERR Grp 4 S600 STR01 MAINT CALC I/P ERR Grp 4 S600 STR01 MAINT CALC O/P ERR Grp 4 S600 STR01 MAINT CALC CALC FAIL Grp 4 S600 STR01 MAINT CALC NO PERMIT Grp 4 S600 STR01 LFC CALC CONF ERR Grp 4 S600 STR01 LFC CALC I/P ERR Grp 4 S600 STR01 LFC CALC O/P ERR Grp 4 S600 STR01 LFC CALC CALC FAIL Grp 4 S600 STR01 LFC CALC NO PERMIT Grp 4 S600 STR01 PRV VLV 1 CALC CONF ERR Grp 4 S600 STR01 PRV VLV 1 CALC I/P ERR Grp 4 S600 STR01 PRV VLV 1 CALC O/P ERR Grp 4 S600 STR01 PRV VLV 1 CALC CALC FAIL Grp 4 S600 STR01 PRV VLV 1 CALC NO PERMIT Grp 4 S600 STR01 O/L VLV 1 CALC CONF ERR Grp 4 S600 STR01 O/L VLV 1 CALC I/P ERR Grp 4 S600 STR01 O/L VLV 1 CALC O/P ERR Grp 4 S600 STR01 O/L VLV 1 CALC CALC FAIL Grp 4 S600 STR01 O/L VLV 1 CALC NO PERMIT Grp 4 S600 STR01 I/L VLV 1 CALC CONF ERR Grp 4

Alderley Controls



S600 STR01 I/L VLV 1 CALC I/P ERR Grp 4 S600 STR01 I/L VLV 1 CALC O/P ERR Grp 4 S600 STR01 I/L VLV 1 CALC CALC FAIL Grp 4 S600 STR01 I/L VLV 1 CALC NO PERMIT Grp 4 S600 STR01 DENS.D CALC CONF ERR Grp 4 S600 STR01 DENS.D CALC I/P ERR Grp 4 S600 STR01 DENS.D CALC O/P ERR Grp 4 S600 STR01 DENS.D CALC CALC FAIL Grp 4 S600 STR01 DENS.D CALC NO PERMIT Grp 4 S600 STR01 PROVE.D CALC CONF ERR Grp 4 S600 STR01 PROVE.D CALC I/P ERR Grp 4 S

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