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4790Continuous Gamma Level SystemInstallation GuideP/N 717830

Revision F

4790Continuous Gamma Level SystemInstallation GuideP/N 717830

Revision F

© 2009 Thermo Fisher Scientific Inc. All rights reserved.

“Microsoft” and “Windows” are either trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries. “HART” is a registered trademark of the HART Communication Foundation.

All other trademarks are the property of Thermo Fisher Scientific Inc. and its subsidiaries.

Thermo Fisher Scientific Inc. (Thermo Fisher) makes every effort to ensure the accuracy and completeness of this manual. However, we cannot be responsible for errors, omissions, or any loss of data as the result of errors or omissions. Thermo Fisher reserves the right to make changes to the manual or improvements to the product at any time without notice.

The material in this manual is proprietary and cannot be reproduced in any form without expressed written consent from Thermo Fisher.

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Revision History

Revision Level Date Comments

B 02-05 Initial release

C 04-06 Address change.

D 09-07 Revised per ECO 5986.

E 11-08 Revised per ECO 6672.

F 10-09 Revised per ECO 7127.

Thermo Fisher Scientific 4790 Installation Guide v

Contents Safety Information & Guidelines ..................................................................... ix

Safety Considerations .............................................................................ix Warnings, Cautions, & Notes ................................................................ix

Chapter 1 Product Overview ............................................................................................. 1-1 Associated Documentation.................................................................. 1-1

Handling & Storage .......................................................................................... 2-1 Chapter 2 ESD Procedures .................................................................................. 2-1 Unpacking, Inspection, & Storage ...................................................... 2-2 Packing, Shipping, Transporting, & Receiving.................................... 2-2

Chapter 3 Installation ......................................................................................................... 3-1 General ............................................................................................... 3-1 Licensing............................................................................................. 3-2 Source-Detector Configurations.......................................................... 3-2 Guidelines........................................................................................... 3-3

General ............................................................................................ 3-3 Power Options ................................................................................. 3-4

The Transmitter.................................................................................. 3-4 Installing Transmitter Boards........................................................... 3-5 AC Power Supply............................................................................. 3-6

The Detector....................................................................................... 3-7 Alignment ........................................................................................ 3-7 Measurable Range ............................................................................ 3-8

Top of Range ................................................................................ 3-8 Bottom of Range........................................................................... 3-9

The Source.......................................................................................... 3-9 Fan Source ....................................................................................... 3-9 Strip Source ................................................................................... 3-10

Multiple Detectors and / or Source Heads......................................... 3-11

Wiring.................................................................................................................. 4-1 Chapter 4 Preparation.......................................................................................... 4-1 The Transmitter.................................................................................. 4-2

EMC Requirement for ATEX Version of 1400S Transmitters ......... 4-2 Board Configurations....................................................................... 4-3 General Wiring Procedure................................................................ 4-3

Thermo Fisher Scientific 4790 Installation Guide vii

Contents

viii 4790 Installation Guide Thermo Fisher Scientific

Detector Wiring.................................................................................. 4-4 Power Supply Wiring .......................................................................... 4-4

24 Vdc Input Power......................................................................... 4-4 12 Vdc Input Power......................................................................... 4-5 AC Power......................................................................................... 4-5

I/O Boards .......................................................................................... 4-5 Current Output Wiring ................................................................... 4-5 Relays............................................................................................... 4-5 Contact Closure (Switch) Inputs ...................................................... 4-6

Serial Communications ....................................................................... 4-6 RS232 Wiring.................................................................................. 4-6 Using Serial Communications.......................................................... 4-6

HART Communications..................................................................... 4-7

Chapter 5 Service & Support .............................................................................................5-1 Contact Information ........................................................................... 5-1

Ordering Information .......................................................................................A-1 Appendix A

Appendix B Specifications...................................................................................................B-1

Drawings............................................................................................................ C-1 Appendix C

Adding Ferrite Clamps to 1400S Transmitter ..............................................D-1 Appendix D Procedure........................................................................................... D-1

Index .......................................................................................................... INDEX-1

Safety Information & Guidelines

This section contains information that must be read and understood by all persons installing, using, or maintaining this equipment.

Safety Considerations

Failure to follow appropriate safety procedures or inappropriate use of the equipment described in this manual can lead to equipment damage or injury to personnel.

Any person working with or on the equipment described in this manual is required to evaluate all functions and operations for potential safety hazards before commencing work. Appropriate precautions must be taken as necessary to prevent potential damage to equipment or injury to personnel.

The information in this manual is designed to aid personnel to correctly and safely install, operate, and/or maintain the system described; however, personnel are still responsible for considering all actions and procedures for potential hazards or conditions that may not have been anticipated in the written procedures. If a procedure cannot be performed safely, it must not be performed until appropriate actions can be taken to ensure the safety of the equipment and personnel. The procedures in this manual are not designed to replace or supersede required or common sense safety practices. All safety warnings listed in any documentation applicable to equipment and parts used in or with the system described in this manual must be read and understood prior to working on or with any part of the system.

Failure to correctly perform the instructions and procedures in this manual or other documents pertaining to this system can result in equipment malfunction, equipment damage, and/or injury to personnel.

Warnings, Cautions, &

Notes

arnings, Cautions, &

Notes

Warnings, cautions, and notes are used throughout this manual to alert users to potential hazards or important information. Failure to heed the warnings and cautions in this manual can lead to injury or equipment damage.

Warning Warnings notify users of procedures, practices, conditions, etc. which may result in injury or death if not carefully observed or followed. The triangular icon displayed with a warning depends on the type of hazard (general, electrical, radiation). ▲

Thermo Fisher Scientific 4790 Installation Guide ix

Safety Information & Guidelines Warnings, Cautions, & Notes

x 4790 Installation Guide Thermo Fisher Scientific

Caution Cautions notify users of operating procedures, practices, conditions, etc. which may result in equipment damage if not carefully observed or followed. ▲

Note Notes emphasize important or essential information or a statement of company policy regarding an operating procedure, practice, condition, etc. ▲

Tip Tips may also be used in this manual. They are suggestions or things to consider that will help you use the instrument or this manual. ▲

Chapter 1

Product Overview

Refer to the 4790 User Guide (P/N 717831) for a description of instrument functions and features, ordering information, and product specifications.

Associated Documentation

In addition to this guide, the following documents must be read and understood by all persons installing, using, or maintaining this equipment:

● 4790 User Guide (P/N 717831)

● Gamma Radiation Safety (P/N 717904)

Thermo Fisher Scientific 4790 Installation Guide 1-1

Chapter 2

Handling & Storage

This chapter addresses procedures for handling electrostatic discharge (ESD) sensitive equipment, as well as procedures for unpacking, inspecting, and storing of the system.

Caution This system is an ESD sensitive instrument. Use proper ESD protective equipment and procedures. Failure to comply with ESD procedures can result in circuit damage. ▲

ESD Procedures SD Procedures The instrument contains electronic components that can be damaged from discharges of static electricity. Ordinarily, handling the circuit boards by their edges will not damage the circuits.

Caution Do not touch the circuit board components. ▲

Observe the following when installing, setting up, servicing, troubleshooting, or repairing the instrument:

1. Use an antistatic bag. Most instrument subassemblies are shipped in a special antistatic bag. When not installed, keep the assembly in the bag as often as possible.

2. Remove ESD sensitive subassemblies only under the following conditions:

a. When at a designated static-free workstation or when the bag is grounded at a field site.

b. After the conductive area of the container has been neutralized.

c. After making firm contact with an antistatic mat and / or firmly gripping a grounded individual.

3. Personnel handling ESD sensitive devices should be neutralized to a static-free workstation by means of a grounding wrist strap that is connected to the station or to a good grounding point at the field site.


Handling & Storage Unpacking, Inspection, & Storage

2-2 4790 Installation Guide Thermo Fisher Scientific

4. Do not allow clothing to make contact with ESD sensitive devices.

5. Avoid touching edge connectors and components.

6. Avoid partially connecting ESD sensitive devices. These devices, especially the power supply connector, can be damaged by floating leads.

7. Ground test equipment.

8. Avoid static charges during troubleshooting.

Unpacking, Inspection, &

Storage

Note Inspection, adjustment, installation, and maintenance of the instrument must be performed by experienced personnel only. ▲

1. Upon receipt, inspect the instrument for damage that may have occurred while in transit. If there is evidence of rough handling or damage, file a damage claim with the transportation company immediately. Notify Thermo Fisher and / or your sales representative as soon as possible.

2. Carefully inspect the packing material prior to discarding it to ensure that all equipment and instruction paperwork has been removed.

3. Use the original packing material and container for storage if necessary.

4. If storing the instrument, the storage environment should be protected, free from extremes of temperatures and high humidity, and fall within the environmental constraints listed in the specifications (Appendix B).

Packing, Shipping, Transporting, &

Receiving

All personnel involved in the packing, shipping, or receiving of hazardous material must be trained in accordance with the United States Department of Transportation (DOT) and OSHA hazardous materials regulations or in accordance with the Canadian Nuclear Safety Commission (CNSC) regulations.

Chapter 3 Installation

Read Gamma Radiation Safety (P/N 717904) prior to installing the equipment.

Tip Copies of the drawings referenced in this manual are provided in Appendix C. ▲

General eneral The Thermo Scientific 4790 consists of three components:

1. 1400A (non-metallic) or 1400S (stainless steel) transmitter

2. 7002Z ion chamber detector

3. Source head: Narrow beam (Models 5200-5204), fan beam (Models 5205-5208, 5210), strip source (Models 5194-5196)

Note In this manual, the generic use of “transmitter” or “transmitters” implies the 1400A and 1400S. The specific model name will be used only when necessary. ▲

The combination of the detector and the source head is referred to as the gauge head.

For transmitter to detector layout details, refer to drawing 868736. For mounting dimensions, refer to drawing 951-7002Z0-01.

The source head used with the detector depends on the requirements of the application. Refer to the appropriate drawing for your source.


Installation Licensing

Licensing censing

Warning The instrument is a nuclear device regulated by federal and / or state authorities. You are responsible for knowing and following the pertinent safety and regulatory requirements. Refer to Gamma Radiation Safety (P/N 717904) for a summary of these requirements. ▲

Warning Moving or removing an installed source housing or any assembly that includes a source housing requires a person who is specifically licensed to install and commission Thermo Scientific source heads. ▲

In the United States, your general license permits you to own and install all of the instrument’s components, including the source head. However, you may not commission the instrument (remove the lock and open the source housing shutter for the first time) without a specific license authorizing radiation commissioning of the instrument. In Canada, you are only allowed to remove the instrument from the shipping container if your CNSC license has a condition authorizing mounting / dismounting of devices. For assistance obtaining a license or commissioning / decommissioning the instrument, contact Thermo Fisher.

Source-Detector Configurations

Source-Detector Configurations

The gauge consists of one or more source heads, one or more detectors, and a transmitter. Source heads are available with either a narrow or fan-shaped beam or with a strip source configuration. Strip sources emit radiation evenly along the length of the source. For most applications, ion chamber detectors are used, and for certain very narrow span applications (level measurement range of approximately two inches), a scintillation detector may be used. Some applications may require multiple sources and / or detectors. Three possible configurations are illustrated below.

Figure 3–1.


Installation Guidelines

Guidelines Warning Do not install the system in any hazardous area other than those approved. Refer to the equipment tag for the specific approvals applicable to the configuration of your instrument. ▲

Warning Do not apply power to the instrument in any hazardous area unless the safety ground is properly wired inside the instrument and the cover is properly installed. ▲

General eneral Review the following guidelines when planning gauge installation.

1. Correct power source is available. See “Power Requirements” later in this chapter.

2. Operating temperature range:

a. Transmitter: -40°C to 60°C (-40°F to 140°F)

b. 7002Z ion chamber detector: -25°C to 60°C (-13°F to 140°F)

3. The transmitter should be mounted so that the display is easily seen and the keypad on the transmitter is easily accessible.

4. The transmitter should not be mounted near high voltage, high current, corrosive vapors, corrosive liquids, or corrosive esters.

5. There should be enough clearance to install and service the gauge head. Refer to the appropriate drawings for your type of gauge and mount (Appendix C).

6. The source housing should be positioned so that the radioactive source identification tag is visible. The source housing tag should be upright.

7. The gauge should not be mounted where process overflow or other material can collect in the beam path. The source shutter mechanism must be kept free of debris.

8. The maximum cable length between the transmitter and the last detector should not exceed 2500 feet (763 m).


Installation The Transmitter

1. Transmitter Power Options a. 1400A

● 115/230 Vac input (100–240 Vac), 50/60 Hz, 25 VA

● 24 Vdc input (20–28 Vdc), 12 W

● 12 Vdc input (9–15), 15 W max (requires optional PCB)

b. 1400S

● 115/230 Vac input (100–240 Vac), 50/60 Hz, 17.2 W

● 24 Vdc input (20–28 Vdc), 12 W

2. 7002Z ion chamber detector: Powered by transmitter.

The Transmitter Warning Do not install the unit in any hazardous area other than those approved. Refer to the equipment tag for the specific approvals applicable to the configuration of your instrument. Follow all instructions on the installation drawings. ▲

Warning Do not apply power to the unit in any hazardous area unless the safety ground is properly wired inside the unit and the cover is properly installed. ▲

Warning Use proper lifting procedures during installation to avoid injury. ▲

1. Refer to the proper dimensional drawing for the transmitter mounting dimensions (868212 for 1400A or 208-140002 for 1400S).

2. Mount the transmitter in one of the following two ways:

- Four screws by placing one screw through each of the four holes in the transmitter enclosure’s flange and tightening.

- Four nuts, four bolts, and eight washers by placing one bolt through each of the four holes in the transmitter enclosure’s flange, with one washer on each side. Screw on the nuts, and tighten the bolts.



Installing Transmitter Boards

stalling Transmitter Boards

Warning Remove all power from the unit prior to opening the transmitter enclosure. Electrocution can result if power is present. ▲

The following procedure applies to all transmitter boards except for the AC power supply. Refer to “Replacing the AC Power Supply” later in this chapter.

1. Verify that power has been removed from the transmitter.

2. Remove the screws on the faceplate (cover) and open it.

3. If replacing a board, remove the board that is currently installed:

a. Unplug any screw-in terminal connectors that have been wired from the board.

b. Remove the board retaining screw in the upper card guide.

c. Firmly but carefully push down on the top edge of the board to disengage the board connector from the transmitter. Pull up and out on the bottom edge of the board to remove it.

4. Align the board with the upper and lower card guide slots, and insert the board into the slots.

5. Line up the 3-pin by 16-pin male connector on the board with the corresponding connector on the back of the transmitter.

6. Firmly but carefully push on the board until the connector is fully seated.

7. Insert and tighten the board retaining screw in the upper card guide.

8. Connect the screw-terminal connector(s) to the corresponding replacement board connectors.

9. Refer to Chapter 4 for wiring procedures.

10. Close the transmitter and tighten the cover screws.



AC Power Supply C Power Supply

Warning If a power supply fails, the input capacitor might still be charged at a high voltage (up to 400 V). ▲

Caution Do not remove the 4 screws which are used to secure the power supply to the mounting bracket. The power supply and mounting bracket are placed as a single unit. ▲

Note The old power supply assembly is not field repairable. ▲

1. Follow the procedure in step 3 above to remove all other transmitter boards (CPU, PCB 1, PCB 2, PCB 3, and PCB 4).

2. Remove the two hold-down screws from the base of the power supply mounting bracket. These screws secure the power supply mounting bracket to the main board.

3. Disconnect cables from the power supply (AC, DC, and Protective Safety Ground). If replacing the power supply, remove the existing power supply and mounting bracket assembly. Replace it with the new supply.

4. Connect the cables to the replacement power supply (see “AC Power” in Chapter 4 for wiring instructions).

5. Tighten the two hold-down screws to secure the power supply to the main board. (A screw-holding screwdriver facilitates installation.)

6. Reinstall the transmitter boards.


Installation The Detector

The Detector Warning Installation must be in accordance with local and national electric codes for the area classifications. ▲

Warning The source housing handle must be in the OFF position during installation. ▲

Warning Do not reach inside the source housing at any time during installation. ▲

Warning Use proper lifting procedures during installation to avoid injury. ▲

Alignment nment Refer to the appropriate installation and layout dimensional drawings for the detector supplied with your gauge (for the 7002Z ion chamber detector, refer to drawing 868736).

The source housing and detector are normally installed across the diameter of the vessel. If mechanisms internal to the process vessel would interrupt the radiation beam, you can install the housing and detector slightly off center. Refer to Figure 3–2. If the angle between the source and detector relative to the center of the vessel is going to be less than 130º, contact Thermo Fisher.

Figure 3–2.

It is important to mount the gauge head securely, since any movement or change in alignment can affect the gauge’s calibration. When mounting the source, be sure to include a means of aiming the beam several degrees left or right so the source beam can be aligned with the detector. The exact mounting method depends on the application.

Align the center of the source beam as closely as possible with the centerline of the detector housing. The source beam is narrow horizontally, and the radiation is uniform only in the primary (center) part of the beam. The radiation in the secondary part of the beam is attenuated by the shielding in the source housing.


Installation The Detector

Figure 3–3.

To determine the primary beam width, you will need the included angle of the beam, which is typically approximately 12°. For each degree, the beam will be 1 unit wide for every 5 units from the source. For example, if the included angle is 12°, the primary beam width will be 12 inches wide 60 inches away from the source head. At 120 inches from the source head, the beam width will be 24 inches, and so on. This is illustrated in the figure below.

Figure 3–4. Determining primary beam width

Measurable Range Before beginning the installation, verify that the measurable range (the range over which the process level can be measured) of the proposed installation meets the requirements of your application. The top and bottom of the measurement range depend on the source type, the detector length, and the position of the source relative to the detector’s sensitive length. Sensitive length refers to the part of the detector that senses radiation.

Top of Range For a fan source with an ion chamber detector, the top of the range is at the top of the sensitive length of the detector or at the center of the source housing, whichever is lower.

For a strip source with an ion chamber detector, the top of the range is at the top of the sensitive length of the detector or at the top of the active length of the source, whichever is lower.


Installation The Source

Bottom of Range For a fan source, the bottom of the range is the point where a line drawn from the fan source to the detector centerline at the bottom end of the detector’s sensitive length intersects the inner vessel wall nearest the detector.

Tip If the vertical beam width of the source does not fully illuminate the sensitive length of the detector, the bottom of the range is the point at which the lower limit of the source beam intersects the inner vessel wall. ▲

For a strip source, the bottom of the range is at the bottom of the detector’s sensitive length or at the bottom of the active length of the source, whichever is higher.

The Source Normally, the detector is mounted so that the top of the detector’s sensitive length is even with the top of the fan beam or even with the top of the active length of the strip source. Refer to the appropriate drawing for your source for mounting dimensions and other details.

Warning In the United States, you may uncrate and mount the source housing, but you may not remove the shipping bolt unless you are licensed to commission the gauge. In Canada, you must have a license condition permitting mounting / dismounting, and without this condition, users may not remove the source from the shipping crate. ▲

Warning Use proper lifting procedures to avoid injury. ▲

Fan Source an Source Note the following if using a fan source.

1. The vertical angle of the fan source beam is typically 45°. This means that the beam’s vertical range is equal to the horizontal distance between the detector and the source.

2. Mount the source so that the top of the fan beam is aligned with the top of the sensitive length of the detector.

3. Install the source housing with its mounting face as close to the process vessel as practical, with no structural material (mounting tabs, brackets, etc.) between the beam area and the vessel.


Installation The Source

4. The mounting should ensure accurate beam alignment with the detector and provide for easy left-right angular adjustment. The top of the beam should be even with the top of the measurable range.

Strip Source Note the following if using a strip source.

1. Refer to the source housing drawings to determine the position of the active length of the strip source and other mounting dimensions.

2. Secure the housing with the 1/2-inch (12 mm) bolts and lock washers (six places). The housing mounting face allows clearance for bolts or studs extending up to 2-1/4 inches (57 mm) from the mounting surface.

3. For best results, the measurable range should be less than the active length of the strip source(s). Position the strip source so that the bottom of the active length of the source is even with the minimum level to be measured. If the measurable range must be greater than the active length of the strip source, position the top of the active length of the source so that it is even with the maximum level to be measured.

4. The mounting surface should be vertical, and the mounting should ensure accurate beam alignment with the detector and provide for easy left-right angular adjustment.

5. Install the source housing with its mounting face as close to the vessel as practical, with no structural material (mounting tabs, brackets, etc.) between the beam area and the vessel.


Installation Multiple Detectors and / or Source Heads


Multiple Detectors and /

or Source Heads

Certain applications may require the use of multiple detectors and/or source heads to span the desired measurable range.

If multiple detectors are used, mount the uppermost unit so that the top of its sensitive length is even with the top of the measurable range. Mount the remaining units so that the top of each detector’s sensitive length is aligned with, or slightly overlaps, the bottom of the sensitive length of the detector mounted just above it.

If more than one source head is required, install the top source housing with the top of its beam even with the top of the desired measurable range. Space the other source housings evenly along the vertical dimension of the vessel. For example, if the range of interest is 12 feet and three fan beam sources are used, space the source housings four feet apart.

When mounting two or more pairs of strip sources and detectors on a small diameter tank, adjacent pairs of sources and detectors may be rotated by 90° if necessary. The source and detector for each source-detector pair at the same height must still be mounted on opposite sides of the tank (180°). After mounting the uppermost source-detector pair, the position of the next lower pair may be rotated by 90°.

Chapter 4

Wiring

Wiring should be performed in the following order:

1. Power to the transmitter

2. The detector to the transmitter

3. Optional wiring:

a. Relay contacts

b. 4–20 mA current output(s)

c. Contact closure inputs

d. Serial communications

e. Wiring to connect multiple detectors

Preparation reparation Review the following warnings and cautions carefully prior to connecting any wiring.

Warning Remove all power from the unit before making any connections. Electrocution can result if power is present. ▲

Warning All wiring must be done by qualified individuals in accordance with applicable codes such as the NEC (National Electric Code) ANSI/NFPA 70 specifications or the Canadian Electrical Code Part 1. Only approved conduit, boxes, and fittings may be used. ▲

Warning Do not apply power to the unit in any hazardous area unless the safety ground is properly wired inside the unit and the cover is properly installed. ▲

Warning For hazardous location installations, the cable entries must be sealed per drawing 868736. ▲


Wiring The Transmitter

Warning For non-hazardous location installations, the cable entries into the enclosure must be sealed with a compound to protect against the passage of gas or vapors. The sealing compound should not be affected by the surrounding atmosphere or liquids. The sealing compound must have a thickness of at least 5/8 inch (16 mm). ▲

Warning If metal conduit is used, the conduit must be grounded. ▲

Warning Connect the AC wiring earth ground to the internal safety ground terminal, as shown in the wiring diagram. Refer to “AC Power” later in this chapter to change the AC supply voltage. ▲

Drawing 868736 provides general guidance for routing the cables to the instrument. Drawing 868680-4 describes the function and wiring requirements for each connector on the boards. This drawing also shows cable requirements, power requirements, and grounding locations.

The wiring label on the top of the instrument’s detector-transmitter chassis also provides connector wiring information for the CPU, power, and temperature compensation boards.

The Transmitter

EMC Requirement for ATEX Version of 1400S Transmitters

Requirement for ATEX Version of 1400S Transmitters

In order for the 1400S transmitter to meet electromagnetic emission requirements for CE-EMC approvals, ferrite clamps must be installed within the transmitter enclosure on all power and signal wiring going into and out of the transmitter housing.

One ferrite clamp is installed on the wires of the AC power supply input. Five additional ferrite clamps are provided with the EMC ferrite clamps kit (P/N 868773). The installation procedure accompanies the kit. It is also provided in Appendix D.

Note The ferrite clamps are only used in the ATEX version of the 1400S transmitter. They are not required for the CSA version or the plastic 1400A transmitter. ▲


Wiring The Transmitter

Board Configurations

The transmitter has slots for the following boards:

● AC power supply

● CPU board with 7002Z interface

● PCB 1: Standard current I/O / DC power board in one of the following configurations:

24 Vdc input power and current I/O #1, 2 contact inputs, 2 relays (optional)

12 Vdc input power and current I/O #1, 2 contact inputs (optional)

● PCB 2: Optional current I/O board, 2 contact inputs, 2 relays

● PCB 3: Optional current I/O board, 2 contact inputs, 2 relays

Follow this general procedure to wire boards installed in the transmitter. General Wiring Procedure

neral Wiring Procedure

Warning Remove all power from the unit before making any connections. Electrocution can result if power is present. ▲

Warning All wiring must be done by qualified individuals in accordance with applicable codes such as the NEC (National Electric Code) ANSI/NFPA 70 specifications or the Canadian Electrical Code Part 1. Only approved conduit, boxes, and fittings may be used. ▲

Note CSA certified fittings must be used to maintain CSA rating for the enclosure. ▲

1. Ensure power to the gauge is removed, and open the enclosure cover.

2. Remove the plugs only from the cable conduit holes you will use. The holes are labeled on the transmitter enclosure.

3. Pull the cable through the fitting on the end of the enclosure. Leave approximately 6 inches (150 mm) of stress relief. Secure the conduit, ensuring it is completely sealed.

4. For ATEX versions of the 1400S: Install a ferrite clamp on all wiring. You will need kit 868773. Refer to Appendix D.


Wiring Detector Wiring

5. Connect a cable to a PCB as follows:

a. Remove the plug-in screw terminal connector from the board connector. If the connector is tight, brace the board with your hand to remove the screw terminal connector, but be careful to not touch any circuit components.

b. Loosen the terminal screws on the connector. Insert the wires into the connector and make connections as shown in the appropriate installation wiring drawing.

c. Tighten the terminal screws to secure the wires.

d. Plug the screw-terminal connector back into the corresponding on-board connector.

6. When all connections are complete, close and secure the transmitter cover.

Detector Wiring The detector is completely powered from the transmitter. The three-conductor cable provides +24 Vdc input to the detector and a 24 V bidirectional log signal, which use a common ground. The only other electrical connection to the detector is the Safety. Refer to drawing 868680-4.

Power Supply Wiring Note To meet the requirements of CSA 1010.1, an external switch or

circuit breaker must be installed to allow the power source to be disconnected from the gauge. In addition, protective bonding (grounding) must always be provided even if a DC power source is used. ▲

24 Vdc Input Power With 24 Vdc input power, the system is designed to operate on 20–28 Vdc. The maximum input power requirement is 12 W when all options are present. Refer to drawing 868680-4 for wiring requirements.

Note To meet the requirements of CSA 1010.1, the input DC terminals must be supplied from an SELV (Safety Extra Low Voltage) source. ▲

1. Connect +24 Vdc to pin 8 of the J5 connector on the current I/O #1 (PCB 1) board.

2. Connect the return for the +24 Vdc supply to ground, pin 9 of the J5 connector.


Wiring I/O Boards

12 Vdc Input Power With 12 Vdc input power, the system is designed to operate on 9–15 Vdc. The maximum input power requirement is 15 W when all options are present. Refer to drawing 868680-4 for wiring requirements. To connect 12 Vdc:

1. Connect +12 Vdc to pin 2 of the J6 connector on the current I/O #1 (PCB 1) board.

2. Connect the return for the +12 Vdc supply to ground, pin 1 or pin 3 of the J6 connector.

Note The J6 connector is only present if the 12 Vdc option is installed. ▲

AC Power With AC power, the system is designed to operate on 100–240 Vac at an input frequency of 50/60 Hz. This configuration can be directly wired to either 115 or 230 Vac. The maximum input power requirement is 25 VA when all options are present. Refer to drawing 868680-4 for wiring requirements. To connect AC power:

1. Connect AC power input (L and N) to the J1 terminal block.

2. Connect electrical safety ground to a dedicated safety ground terminal.

I/O Boards

Current Output Wiring

One current output (I/O) board is supplied as standard with the instrument. It is installed in the PCB 1 slot. Up to two optional I/O boards can be installed in the PCB 2 and PCB 3 slots. The current output is programmable between 0 and 20 mA. The minimum output is approximately 3 mA, and the maximum load is 750 ohms.

The current output is normally shipped with an isolated, self-powered output configuration. You can reconfigure it with an isolated, loop-powered configuration by removing the jumper from pins 3 and 4 on the J5 connector on the I/O board. In the loop-powered configuration, you must supply +24 Vdc loop power to pin 3 of J5; pin 2 of J5 is Iout+.

Relays Two or four relays are available as options on the I/O board in the PCB 1 slot. Refer to drawing 868680-4 and the label inside the transmitter cover for wiring details. Relay contacts are Form C SPDT, isolated 8 A, 220 Vac.


Wiring Serial Communications

Contact Closure (Switch) Inputs

Two user-provided contact closure inputs are included on each I/O board. The contact closure inputs are dry contact inputs between ground and Switch 1 and ground and Switch 2. The gauge can be configured via software settings to execute a command or other function upon a user-provided contact opening or closing. Refer to the 4790 User Guide (P/N 717831) for instructions on assigning commands to the contact closure inputs.

Serial Communications

The gauge provides an RS232 single-drop serial interface. Screw terminal connectors for the ports are located on the CPU board.

RS232 Wiring Refer to drawing 868680-4 for details. The serial port on a PC (COM1 or COM2) can be connected directly to the RS232 port on the gauge. This connection requires five wires: ground, transmit (TX), receive (RX), RTS, and CTS. The connections between the gauge RS232 port connector (located on the CPU board in the transmitter) and the PC serial port are summarized in the following table for standard DB9 and DB25 PC serial port connectors.

Table 4–1.

CPU Board (J8) RS232 Connector

PC Serial Port DB9 Connector

PC Serial Port DB25 Connector

Pin 1, J8 (RTS) Pin 8 Pin 5

Pin 2, J8 (TX) Pin 2 Pin 3

Pin 3, J8 (CTS) Pin 7 Pin 4

Pin 4, J8 (RX) Pin 3 Pin 2

Pin 5, J8 (GND) Pin 5 Pin 7

Using Serial Communications

To communicate with the gauge from a PC requires that the PC be running TMTComm, a Windows-based communications software, or another terminal emulation software. The default communication settings:

● 7 data bits

● Even parity

● 1 stop bit

● 9600 baud data rate

Refer to the 4790 User Guide (P/N 717831) for additional details about setting up and using serial communications.


Wiring HART Communications


HART Communications

The HART communication protocol is supported over the 4–20 mA current output with an optional daughter board. You can communicate with the gauge using the 375 Field Communicator from Emerson Electric Co. Refer to manual 717817 for instructions.


Chapter 5

Service & Support

Contact Information

The local representative is your first contact for support and is well equipped to answer questions. You can also contact Thermo Fisher directly for application assistance.

In the United States In Canada

Thermo Fisher Scientific 1410 Gillingham Lane Sugar Land, TX 77478 Phone: 713-272-0404 Fax: 713-272-2272

Thermo Fisher Scientific 14 Gormley Industrial Avenue Gormley, Ontario L0H 1G0 Phone: 905-888-8808 Fax: 905-888-8828

In Europe On the Web

Thermo Fisher Scientific Ion Path Road Three Winsford Cheshire CW7 3GA United Kingdom Phone: +44 (0) 1606 548700

www.thermo.com

Appendix A

Ordering Information

Table A–1. System ordering information

Code Model

4790 4790 continuous nuclear/gamma level

Code Approval

7002ZC Factory Mutual approvals

7002ZB CSA approvals

Code First Detector Length

01 1 ft detector (305 mm)


03 3 ft detector (915 mm); consult Thermo Fisher


05 5 ft detector (1525 mm) ; consult Thermo Fisher




Code Second Detector Length (optional)

XX XX ft detector (same lengths available as first detector)

Code Third Detector Length (optional)


Code Fourth Detector Length (optional)


Thermo Fisher Scientific 4790 Installation Guide A-1

Ordering Information

A-2 4790 Installation Guide Thermo Fisher Scientific

Table A–2. Detector

P/N Description

210-000150 Assembly, controller, and pre-amp PCB set

220-000430 Assembly, PCB insulating cover

300-000035 Clamp, detector mounting

617-000112 End cap, detector

660-000100 O-ring, detector end cap

Table A–3. Transmitter

P/N Description

HLT-MTXR 1400A transmitter

HLT-MTXR-SS 1400S transmitter, stainless steel

886766 Kit, KRIL/4790 CPU with EPROM for level

886722-1 KIB for KRIL/4790

886420-1 4-line display

886650 AC power supply

OTO545B HART interface module

886675-1 Current output module 1, no relays

886675-2 Current output module 1, with 2 Form C relays

886675-5 Current output module 2, no relays

886675-6 Current output module 2, with 2 Form C relays

868773 Kit, EMC ferrite clamps for 1400S transmitter (for ATEX units only)

Appendix B

Specifications

Results may vary under different operating conditions.

Table B–1. System specifications

Operating principle

Gamma radiation from the source passes through the process pipe and material. The amount of radiation reaching the detector decreases as the process level increases.

Accuracy ± 1% of span

Stability Drift less than 1.0% absolute radiation change per 6 months

Table B–2. Ion chamber detector specifications

Detectors per installation Up to 4 detectors may be used per installation

Supply voltage / consumption Power supplied from transmitter

Operating temperature range -25°C to +60°C (-13°F to +140°F)

Humidity 10% to 95% RH non-condensing

Minimum operational radiation field

0.2 mR/hr

Enclosure ANSI 300 Series stainless steel

Connections Two 3/4-inch NPT conduit entries

Output Single 3-wire instrument cable for digital communication to transmitter; in multi-detector installations, each detector is wired in parallel

Interconnecting cable Maximum length 2500 ft (763 m) between detector and transmitter Standard 3-conductor, shielded (Belden 9365)

Thermo Fisher Scientific 4790 Installation Guide B-1

Specifications

Table B–3. 1400A transmitter specifications

Power supply Power input is transient surge protected. AC power: 115/230 Vac (100–240 V), 50/60 Hz, 25 VA DC power: 24 Vdc (20–28 V), 12 W; or 12 Vdc (9–15 V), 15 W

NEMA 4X FM/CSA approvals

Class I, Div. 2, Groups A, B, C, D Class II, Div. 2, Groups F, G Class III NEMA 4X, Type 4X

Dimensions 12 x 8.5 x 8.25 in. (305 x 216 x 210 mm)

Weight 7.5 lb (3.4 kg)

Operating temperature

-40°C to +60°C (-40°F to +140°F)

Circuit protection Meets IEC 801-1, -2, and -3. Current outputs and relay outputs are isolated

Serial interface RS232, full duplex communication with remote terminal, printer, PC, or host computer

Current output One standard; maximum of two additional Standard Configuration: Isolated, self-powered, 700-ohm maximum load Alternate Configuration: Isolated, loop-powered, 24 Vdc nominal supply voltage, 700-ohm maximum load

Contact closure inputs

Two per I/O board

Relays Two optional per I/O board; six maximum. Form C SPDT, isolated, 8 A, 220 Vac

B-2 4790 Installation Guide Thermo Fisher Scientific

Specifications

Thermo Fisher Scientific 4790 Installation Guide B-3

Table B–4. 1400S transmitter

System architecture Multiprocessor-based electronics for uninterrupted output during data entry and system interrogation. All user data doubly stored in non-volatile memory with no battery backup required.

Display Four-line backlit display; up to eight readouts displayed simultaneously

Current output One standard. Maximum of three current outputs available, with each representing independent span channels Standard configuration: Isolated, self-powered, 800-ohm max. load Alternate configuration: Isolated, loop-powered, 24 Vdc nominal supply voltage, 800-ohm max. load

Serial outputs RS485 half-duplex. RS232 full duplex.

Contact closure outputs Up to 16 available. 115 Vac / 28 Vdc SPDT @ 10 amps (230 Vac SPDT @ 8 amps)

Inputs Up to three additional I/O available; dry contact closure.

Programming options Menu driven, direct keypad entry

Power supply AC power: 115/230 Vac (100–240 V), 50/60 Hz, 17.2 W DC power: 24 Vdc (20–28 V), 12 W

Dimensions See drawing 208-140002.

Approvals NEMA 4X / IP65 ATEX: II 3 G Ex nA IIC T6 (-40°C ≤ Ta ≤ 60°C) DC version, EPSILON 08 ATEX 2387: II 3 G Ex nA nC IIC T4 (-20°C ≤ Ta ≤ 50°C) AC version, EPSILON 08 ATEX 2387 CSA: Class I, Div. 2, Groups A, B, C, and D; Class II, Div. 2, Groups F and G; Class III Enclosure type 4X, Temperature code T3C / T4 Power = 20–28 Vdc, 12 W, 100–240 Vac, 50/60 Hz, 2 A, 25 VA maximum Ambient temperature variation: -40°C to +60°C (-40°F to +140°F) CE compliant Low Voltage Directive compliant EMC Directive compliant

Appendix C

Drawings

Note Information presented in this chapter has been regenerated from original drawings. Every effort is made to maintain document accuracy. However, in order to enhance legibility, the documents may have been restructured, and some information may have been intentionally excluded. Therefore, the drawings within this guide may not be an exact duplicate of the original drawings. ▲

Note Drawings in this manual are included for reference only and may not be the current version. Contact the factory if you need a copy of the latest revision. ▲

Table C–1. Wiring: Ion Chamber Detectors

Drawing # Rev. Description Page

868736 B Installation layout, 1400A / 1400S transmitter to 7002Z ion chamber detectors (1 sheet)

C–3

868680-4 B Wiring diagram (3 sheets) C–4

Table C–2. Mechanical


868212 F 1400A transmitter dimensional diagram (1 sheet) C–7

208-140002 A 1400S transmitter dimensional diagram (1 sheet) C–8

951-7002Z0-01 2 7002Z ion chamber detector installation dimensions (1 sheet)

C–9

D-1549-08 3 Typical source / detector installation drawing (2 sheets) C–10

864563 B Mounting dimensions – Model 5200 source housing, 100 mCi or less (1 sheet)

C–12

865453 C Mounting dimensions – Model 5201 source housing, 100 mCi or less (1 sheet)

C–13

865463 D Mounting dimensions – Model 5202 source housing, 500 mCi or less (1 sheet)

C–14

Thermo Fisher Scientific 4790 Installation Guide C-1

Drawings


865474 C Mounting dimensions – Model 5203 source housing, 2000 mCi or less (2 sheets)

C–15

865484 C Mounting dimensions – Model 5204 source housing, 8000 mCi or less (2 sheets)

C–17


C–19


C–20


C–21

865524 D Mounting dimensions – Model 5208 source housing, 8000 mCi or less (1 sheet)

C–22

866891 A Mounting dimensions – Model 5210 source housing, 10 Ci CS-137 or 3 Ci Co-60 (1 sheet)

C–23

860463 B Mounting dimensions – Model 5194 strip source, 1 ft, 500 mCi (1 sheet)

C–24

860473 C Mounting dimensions – Model 5195 strip source, 2 ft, 1000 mCi (1 sheet)

C–25

860483 C Mounting dimensions – Model 5196 strip source, 3 ft, 1000 mCi (1 sheet)

C–26

Table C–3. Source Housing Options


866764 -- Interlock option for Models 5205–5208 source heads (1 sheet)

C–27

866664 B Pneumatic actuator and position switch for Model 5205–5208 (1 sheet)

C–28

867269 B Mounting instructions – Remote manual actuator for Models 5202–5208 (2 sheets)

C–29

C-2 4790 Installation Guide Thermo Fisher Scientific

Drawings

Figure C–1. 868736: Installation layout, 1400A / 1400S transmitter to 7002Z ion chamber detectors (sheet 1 of 1)


Drawings


Figure C–2. 868680-4: Wiring diagram, 1400A / 1400s transmitter to 7002Z ion chamber detectors (sheet 1 of 3)

Drawings


Figure C–3. 868680-4: Wiring diagram, 1400A / 1400S transmitter to 7002Z ion chamber detectors (sheet 2 of 3)

Drawings

Figure C–4. 868680-4: Wiring diagram, 1400A / 1400S transmitter to 7002Z ion chamber detectors (sheet 3 of 3)


Drawings


Figure C–5. 868212: 1400A transmitter installation dimensions (sheet 1 of 1)

Drawings


Figure C–6. 208-140002: 1400S transmitter dimension diagram (sheet 1 of 1)

Drawings


Figure C–7. 951-7002Z0-01: 7002Z ion chamber detector installation dimensions (sheet 1 of 1)

Drawings


Figure C–8. D-1549-08: Typical source / detector installation drawing (sheet 1 of 2)

Drawings


Figure C–9. D-1549-08: Typical source / detector installation drawing (sheet 2 of 2)

Drawings


Figure C–10. 864563: Mounting dimensions – Model 5200 source housing, 100 mCi or less (sheet 1 of 1)

Drawings



Drawings


Figure C–18. 865504: Mounting dimensions – Model 5206 source housing, 500 mCi (sheet 1 of 1)

Drawings



Drawings


Figure C–21. 866891: Mounting dimensions – Model 5210 source housing, 10 Ci Cs-137 or 3 Ci Co-60 (sheet 1 of 1)

Drawings


Figure C–22. 860463: Mounting dimensions – Model 5194 strip source, 1 ft, 500 mCi (sheet 1 of 1)

Drawings



Drawings

Figure C–25. 866764: Interlock option for Models 5202–5208 source heads (sheet 1 of 1)


Drawings


Figure C–26. 866664: Pneumatic actuator and position switch for Models 5202–5208 (sheet 1 of 1)

Drawings


Figure C–27. 867267: Mounting instructions – Remote manual actuator for Models 5205–5208 (sheet 1 of 2)

Drawings


Figure C–28. 867269: Mounting instructions – Remote manual actuator for Models 5202–5208 (sheet 2 of 2)

Appendix D

Adding Ferrite Clamps to 1400S Transmitter

Note The ferrite clamps are only used in the ATEX version of the 1400S transmitter. They are not required for the CSA version or the plastic 1400A transmitter. If needed, the ferrite clamps kit may be ordered separately. ▲

In order for the 1400S transmitter to meet electromagnetic emission requirements for CE-EMC approvals, ferrite clamps must be installed within the transmitter enclosure on all power and signal wiring going into and out of the transmitter housing.

Procedure The ferrite clamp is part of the EMC ferrite clamps kit (P/N 868773). The kit consists of the following:

● Five ferrite clamps (P/N 5-2720-007)

● At least one clamp “key”

● The procedure

The clamp key is used to remove the ferrite clamp from the wire during wiring changes.

Figure D–1. Ferrite clamps

A ferrite clamp will need to be installed on all wiring that enters or exits the transmitter enclosure. This may be a shielded twisted pair or a bundle of individual wires. The limitation is that the wires through one clamp cannot exceed 5 mm in diameter. Also, all of the clamps MUST be installed within the enclosure.

Thermo Fisher Scientific 4790 Installation Guide D-1

Adding Ferrite Clamps to 1400S Transmitter Procedure

D-2 4790 Installation Guide Thermo Fisher Scientific

Figure D–2. Ferrite clamps installed within enclosure

As shown in Figure D–2 the ferrite clamp can be placed around a shielded twisted pair cable or a bundle of individual cables, as long as the diameter of the bundle does not exceed 5 mm (a little over 3/16”).

The ferrite clamp kit (P/N 868773) contains five clamps. Depending on your wiring scheme, you may need additional clamps. They can be ordered using part number 5-2720-007.

For example, in a Thermo Scientific DensityPRO+ system with a scintillation detector, flow input, and three outputs, there will be eight shielded twisted pair cables and one power cable. This system would require a total of nine ferrite clamps. So you would need either two kits or one kit and four additional clamps to be EMC compliant.

Note All ATEX version 1400S transmitters shipped after August 2009 will contain one ferrite clamp kit and will have one ferrite clamp installed on the AC voltage input wiring. ▲

Note If the locking mechanism of the clamp should fail, a plastic wire tie can be used to secure the clamp around the wire. ▲

Index

1 1400A. See transmitter. 1400S. See transmitter.

7 7002Z. See detector.

B beam

alignment, 3-7–3-8 determining width, 3-8

C Canadian Nuclear Safety Commission (CNSC), 2-2, 3-2 Canadian Standards Association (CSA), 4-4 CNSC. See Canadian Nuclear Safety Commission. commissioning, 3-2 communications

HART, 4-7, A-2 serial, 4-6

configuration of current output, 4-5 of PCBs in transmitter, 4-3 of source to detector, 3-2

contact closure input, 4-6, B-2, B-3 contact information, 5-1 CSA. See Canadian Standards Association. current output, B-2, B-3

configuration, 4-5 ordering information, A-2 wiring, 4-5

D Department of Transportation (DOT), 2-2 detector, 3-1

installation, 3-7–3-9 dimensional drawing, C-9

guidelines, 3-3–3-4 layout drawing, C-3 of more than one, 3-11

ordering information, A-1–A-2 power requirements, 3-4 specifications, B-1 to source configurations, 3-2 wiring, 4-4, C-4–C-6

DOT. See Department of Transportion.

E electrostatic discharge (ESD), 2-1–2-2 EMC requirement for ATEX 1400S transmitter, 4-2, D-1–D-2 ESD. See electrostatic discharge.

F fan source, 3-2, Also See source.

determining measurable range, 3-8–3-9 installation guidelines, 3-9–3-10

ferrite clamps EMC requirement for ATEX 1400S transmitter, 4-2, D-1–

D-2

H handling the instrument, 2-1–2-2 hardware

installation, 3-1–3-11 HART, 4-7

ordering information, A-2

I inputs

contact closure, 4-6 installation

drawings, C-1–C-30 guidelines, 3-3–3-4 in hazardous areas, 3-3, 3-4, 4-1 layout drawing, C-3

Thermo Fisher Scientific 4790 Installation Guide INDEX-1

Index

of detector, 3-7–3-9 of source, 3-9–3-10 of transmitter, 3-4 power requirements, 3-4

installing drawings for, C-1–C-30 guidelines for, 3-3–3-4 in hazardous areas, 3-3, 3-4, 4-1 layout drawing for, C-3 power requirements for, 3-4 the detector, 3-7–3-9 the source, 3-9–3-10 the transmitter, 3-4

ion chamber. See detector.

L licensing, 3-2

M measurable range, 3-8–3-9

N National Electric Code (NEC), 4-1 NEC. See National Electric Code.

O ordering information, A-1–A-2 outputs

current output, 4-5, A-2

P power

12 Vdc supply wiring, 4-5 24 Vdc supply wiring, 4-4 AC supply wiring, 4-5 requirements, 3-4

R receiving the instrument, 2-2 relays, 4-5 RS232, 4-6

S safety, ix–x, 2-2, 3-3, 3-4, 3-7, 3-9, 4-1 shipping the instrument, 2-2 source, 3-1

installation aligning the beam, 3-7–3-8 determining beam width, 3-8 determining measurable range, 3-8–3-9 guidelines, 3-3–3-4, 3-9–3-10 mounting drawings, C-12–C-30 of more than one, 3-11

to detector configurations, 3-2 source head. See source. source housing. See source. specifications, B-1–B-3 storing the instrument, 2-2 strip source, 3-2, Also See source.

determining measurable range, 3-8–3-9 installation guidelines, 3-10

T transmitter, 3-1

1400A approvals, B-2 dimensional drawing, C-7

1400S approvals, B-3 dimensionsal drawing, C-8 EMC requirement for ATEX units, 4-2, D-1–D-2

installation, 3-4 guidelines, 3-3–3-4 layout drawing, C-3

ordering information, A-2 PCB configuration, 4-3 power requirements, 3-4 specifications, B-1–B-3 wiring, 4-3–4-4, C-4–C-6

INDEX-2 4790 Installation Guide Thermo Fisher Scientific

Index

Thermo Fisher Scientific 4790 Installation Guide INDEX-3

W wiring

current output, 4-5 diagram, C-4–C-6 EMC requirement for ATEX 1400S transmitter, 4-2, D-1–

D-2 in hazardous areas, 4-1

power, 4-4–4-5 preparation, 4-1–4-2 procedure for transmitter PCBs, 4-3–4-4 relays, 4-5 serial communications, 4-6 the detector, 4-4

Thermo Fisher Scientific81 Wyman StreetP.O. Box 9046Waltham, Massachusetts 02454-9046United States

www.thermofisher.com

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