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TN Densi tyPRO

Gamma Densi ty System Installation Guide

P/N 717774

Revision A

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© 2005 Thermo Electron Corporation. 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.

“Fisher-Rosemount” is either a trademark or registered trademark of Emerson Electric Company.

All other trademarks are the property of Thermo Electron Corporation and its subsidiaries.

Thermo Electron Corporation (Thermo) 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 reserves the right to make changes to the manual or improvements to the product at any time

without notice.

The material in the manual is proprietary and cannot be reproduced in any form without express written consent

from Thermo.

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Revision History

Document Number & Revision Level Date Comments

717774 Rev. 1.0 06-00 Initial release

Rev. 2.0 07-01 Released

Rev. A 03-05 Name change

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Densi tyPRO Table of Contents

Thermo Electron Corporation i

Table of Contents

Chapter 1 Introduction ...................................................................................................................................... 1-1

Description............................................................................................................................................................ 1-1 Approvals.......................................................................................................................................................... 1-1

Source ............................................................................................................................................................... 1-2 Detector-Transmitter......................................................................................................................................... 1-2 Communications and Measurement Display..................................................................................................... 1-2 Inputs and Outputs ............................................................................................................................................ 1-3 Features............................................................................................................................................................. 1-4

How to Use This Manual....................................................................................................................................... 1-5 Installation Instructions..................................................................................................................................... 1-5 Additional Information ..................................................................................................................................... 1-5 Configuring and Using the Gauge..................................................................................................................... 1-5

Thermo Electron Technical Services..................................................................................................................... 1-6

Chapter 2 Hardware Installation...................................................................................................................... 2-1

Licensing............................................................................................................................................................... 2-1 FM/CSA Hazardous Location Approvals.............................................................................................................. 2-1 Mounting the Gauge (Source and Detector-Transmitter)...................................................................................... 2-2

Mounting Configurations.................................................................................................................................. 2-2 Guidelines for Mounting the Gauge.................................................................................................................. 2-2

Mounting Instructions ........................................................................................................................................... 2-3 Single Chain (Unichain) Mounting Instructions ............................................................................................... 2-3 Dual Chain Mounting Instructions.................................................................................................................... 2-4 Pipe Saddle (Cradle) Mounting Instructions..................................................................................................... 2-6 Pipe Spool Mounting Instructions..................................................................................................................... 2-7 Z-Pipe (Axial) Mounting Instructions............................................................................................................... 2-7

Chapter 3 Wiring Procedures ........................................................................................................................... 3-1

Wiring Instructions................................................................................................................................................ 3-1 Wiring Drawings............................................................................................................................................... 3-2 Initial Wiring Preparations................................................................................................................................ 3-2

Power Supply Wiring............................................................................................................................................ 3-3 DC Power.......................................................................................................................................................... 3-3 AC Power.......................................................................................................................................................... 3-3

Board Wiring......................................................................................................................................................... 3-4 Serial Communications..................................................................................................................................... 3-4 HART Communications ................................................................................................................................... 3-6 Current Output .................................................................................................................................................. 3-6 Flow Input......................................................................................................................................................... 3-6 Relays................................................................................................................................................................ 3-7

Contact Closure (Switch) Inputs ....................................................................................................................... 3-7 Chapter 4 Troubleshooting and Maintenance ................................................................................................. 4-1

Source Housing ..................................................................................................................................................... 4-1 Detector-Transmitter ............................................................................................................................................. 4-1

AC Power Supply Fuse..................................................................................................................................... 4-1 Adding or Replacing Boards............................................................................................................................. 4-2 Factory Wiring.................................................................................................................................................. 4-2 Current Output Jumper Settings........................................................................................................................ 4-3

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Table of Contents Densi tyPRO

ii Thermo Electron Corporation

Current Output Problems .................................................................................................................................. 4-3 Relay Problems................................................................................................................................................. 4-3

TroubleShooting.................................................................................................................................................... 4-3

Appendix A How to Return Equipment for Service...........................................................................................A-1

Appendix B Parts List ...........................................................................................................................................B-1

Appendix C Specifications ....................................................................................................................................C-1 Operating Principle ...........................................................................................................................................C-1 Power Supply....................................................................................................................................................C-1 FM / CSA Approvals ........................................................................................................................................C-1 Dimensions .......................................................................................................................................................C-1 Operating Temperature .....................................................................................................................................C-1 Serial Interface..................................................................................................................................................C-1 HART Communications ...................................................................................................................................C-1 Current Output ..................................................................................................................................................C-1 Relays................................................................................................................................................................C-1 Contact Closure Inputs......................................................................................................................................C-1 Display..............................................................................................................................................................C-1

Appendix D Drawings ...........................................................................................................................................D-1 868580, Customer Drawing, Installation Layout DensityPRO, Model 9719A/9720A .....................................D-2 868578, Customer Drawing, Installation Wiring, DensityPRO, Model 9719A/9720A....................................D-3 868519, RS-485 Installation & Wiring .............................................................................................................D-4 866778, Mounting Dimensions, Non-Explosion Proof Detector ......................................................................D-5 866777, Mounting Dimensions, Explosion Proof Detector ..............................................................................D-6 867468, Installation Dwg, Detector Assembly, Flat Mount, NEMA 4 Housing...............................................D-7 867469, Installation Dwg, Detector Assembly, Flat Mount, Exp-proof Housing.............................................D-8 867456, Installation Dwg, Source/Detector Assembly Single Chain Mount, NEMA 4 Housing.....................D-9 867465, Installation Dwg, Source/Detector Assembly Single Chain Mount, Exp-proof Housing .................D-10 867466, Installation Dwg, Source/Detector Assembly Two Chain Mount, NEMA 4 Housing......................D-11 867467, Installation Dwg, Source/Detector Assembly Two Chain Mount, Exp-proof Housing ....................D-12 867172, Installation,Gauge Head, Model 9701/9702 Ion Chamber Detector, Two Chain Mount ..................D-13 85726N, Installation Dwg, Gauge Head, Pipe Saddle Mount .........................................................................D-14 861104, Fabrication Details, 1 inch - 3 inch Z-Pipe Section...........................................................................D-15 866670, Mounting Dimensions, 1 inch - 3 inch Z-Pipe Mounting Configuration ..........................................D-16 864163, Fabrication Details, 4 inch Z-Pipe Section........................................................................................D-17 866705, Mounting Dimensions, 4 inch Z-Pipe Mounting Configuration .......................................................D-18 864563, Mounting Dimensions, Source Housing, 100 mCi or Less (Model 5200) ........................................D-19 865453, Mounting Dimensions, Source Housing, 100 mCi or Less (Model 5201) ........................................D-20 865463, Mounting Dimensions, Source Housing, 500 mCi or Less (Model 5202) ........................................D-21 865474, Mounting Dimensions, Source Housing, 2000 mCi or Less (Model 5203) ......................................D-22 865484, Mounting Dimensions, Source Housing, 8000 mCi or Less (Model 5204) ......................................D-23 866666, Mounting Instructions, Remote Manual Actuator, Model 5201-5204 Source Housings ..................D-24

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Densi tyPRO Chapter 1 Introduction

Thermo Electron Corporation 1-1

Chapter 1 Introduction

The TN DensityPRO Gamma Density System is designed to provide reliable, accurate

process material density measurements for a wide variety of challenging applications.

The gauge is mounted outside of the process vessel and never contacts the processmaterial. The instrument can measure the density of almost any liquid, slurry, emulsion,

or solution.

The instrument can convert the basic density measurement into a variety of output

measurements as appropriate for specific applications, e.g., bulk density or solids content

per unit volume. Given a temperature input, the instrument can compensate the density

measurement relative to a user-specified reference temperature. If a flow input is

provided, the instrument can calculate mass flow. The Setup Menus guide you through

the configuration process to help you quickly complete the gauge setup.

Description

The gauge consists of the source head that contains the radioisotope source and the

detector -transmitter that contains the scintillator detector and electronics. The

radioisotope source emits gamma radiation that passes through the process material. The

detector measures the energy of the radiation arriving at the detector after passing

through the process material (and vessel walls). The gauge determines the density of the

process material by measuring the amount of radiation arriving at the detector, which

varies with the density of the process material.

Approvals

The instrument is certified for use in hazardous locations by FM/CSA as follows.

Model 9719A Detector

• Class II, III, Div. 1, Groups E, F, G

•

NEMA 4 / Type 4Model 9720A Detector

• Class I, II, III, Div. 1, Groups B, C, D, E, F, G

• NEMA 4 / Type 4

Note: Refer to the tag on your gauge to verify the hazardous location approvalinformation for your gauge.

Detector-Transmitter

Source

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Chapter 1 Introduct ion DensityPRO

1-2 Thermo Electron Corporation

Source

A Cesium (Cs137) radioisotope source is used for most applications. A Cobalt (Co60)

source is available for applications requiring a higher energy source. The radioisotope is

bound in ceramic pellets and double-encapsulated in a pair of sealed, stainless-steel

containers. The resulting source capsule is highly resistant to vibration and mechanical

shock.

The source capsule is further enclosed in the source head, a lead-filled, welded steel

housing. A shaped opening in the lead shielding directs the gamma radiation beam

through the process material towards the detector. Outside of the beam path, the energy

escaping the source head is very low and well within prescribed limits. Closing the

source shutter allows the beam to be “turned off” (the shutter blocks the radiation) during

installation or servicing of the gauge. All source housings meet or exceed the safety

requirements of the U.S. Nuclear Regulatory Commission (NRC) and Agreement State

regulations, refer to the Customer Radiation Safety Manual (717821).


The gauge uses a scintillator-type detector to measure the radiation reaching the detector

from the source. The detector consists of a special plastic scintillator material, a

photomultiplier tube, and associated electronics. When radiation strikes the plastic

scintillator material, small flashes of light are emitted. As the density of the process

material increases, more gamma radiation is absorbed by the process material and fewer

light pulses are generated by the scintillator material. A photomultiplier tube and the

associated detector electronics converts the light pulses into electrical pulses that are

processed to determine the process material density and related measurement values.

Measurement Calculation

After the gauge calculates the process material density, it can convert the measurementinto a number of forms. For a slurry (solid material in a carrier fluid), the gauge can

provide measurements based on the ratio of solids to carrier. Similar measurements can

be made for emulsions (two different fluids) and for solutions (a solute material dissolved

in a solvent fluid).

If flow data is provided as an input, the gauge can generate mass flow measurements. A

4-20 mA current output from a magnetic flow sensor or from a Thermo Electron

VersaFLO™ fixed or portable flow meter can be input to the instrument.

For applications that require temperature compensation, the gauge can accept a

temperature input to compensate the density measurement for changes in process

temperature.

Communications and Measurement Display

You communicate with the gauge via the RS-485 or the RS-232 serial ports from a

Thermo Hand-Held Terminal (HHT), a PC running TMTComm for Windows® or

terminal emulation software, or a standard ANSI or VT-100 terminal.

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The HART communication protocol is supported over the 4-20 mA current output with

an optional daughter board. You communicate with the gauge using the standard Fisher

Rosemount 275 HART handheld communicator. Refer to the “DensityPRO/

DensityPRO+ HART Operation Manual,” (717816), for detailed instructions.

Once the gauge has been set up, the primary (density) measurement is displayed on the

external display, if present, and on the remote terminal or HHT.

Inputs and Outputs

Input/Output Characteristics

Type Characteristics Comments

Current output 0-20 mA dc (adjustable range)

Standard Configuration:

Isolated, Loop-powered,

24 Vdc Input, 700 ohm max. load

Alternate Configurations:

1) Non-isolated, Self-Powered,

700 ohm max. load, or

2) Isolated, Self-Powered,700 ohm max. load

Default range is 4-20 mA dc. One

current output is provided on the CPU

board.

Reconfigure current output as:

1) Non-Isolated, Self-Powered by moving a jumper, or

2) Isolated, Self-Powered, requires

“piggy-back” board,(Thermo P/N 886595)

Serial

communications

RS-232: One terminal block

RS-485: One terminal block and one

RJ11 Jack

Full duplex communication with

remote terminal or PC.

Half-duplex communication to PC or

Hand-Held Terminal (HHT).

HART

communications

HART protocol supported over the

4-20 mA current output.

Optional daughter board required.

Relays Two relays (optional) are available onthe AC power/relay board.

Form C SPDT, Isolated, 8 A, 220 Vac

Process alarms and system fault orwarning alarms can be assigned to

control (open/close) relays.

Contact closure

inputs

Two contact closure inputs are

provided on the CPU board.

Execute system commands based on a

user-provided contact switch openingor closure input.

Flow input 4-20 mA current input Current output from a flow sensor can

be input to the gauge. The gauge uses

this input to compute mass-flowreadouts.

Temperature

compensation

Optional Thermo temp. comp. board

- 100 ohm RTD sensor

Temp comp board/sensor allows the

gauge to compensate the densitymeasurement for temperature effects.

External display Optional backlit display of

measurement readouts.

Two lines, 16 characters per line

Up to four measurement readouts can

be displayed at a time.

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Features

Dynamic Menu System

The Setup Menus guide you through the configuration of the gauge. The “Set up density,

den. alarms, and flow” menu group includes all of the basic parameters and commands

required to quickly configure your gauge. Additional menu groups provide specialized parameters and commands allowing the gauge to be tailored to a wide variety of

applications.

Direct-entry menu shortcuts are also provided, allowing experienced users to access

menu items and commands directly, bypassing the menu system.

Instantaneous Response

Our Dynamic Process Tracking (DPT) ensures that there is no lag time in the system

response to significant changes in process density. When changes occur, the DPT feature

reduces the normal averaging time constant by a factor of eight, ensuring a rapid, yet

smooth output response. When the process stabilizes, a longer time constant is applied to

reduce the fluctuations inherent in radiation-based measurements. In this way, process

density changes are immediately reflected in the transmitter output, while the effects of

statistical variations in the radiation measurement are greatly reduced.

Multiple Readouts

Select up to eight measurement values for display. Available measurement types include

density, bulk density, solids concentration, carrier concentration, ratio of solids to carrier,

bulk mass flow, bulk volume flow, and the rate of change of any these measurements.

Extensive Alarms

You can set up as many as 16 process alarms in addition to system fault alarms andwarning alarms.

Totalizers and Batch Control

You can set up four independent totalizers to “count” elapsed time or cumulative

mass/volume when a flow input signal is provided and a mass/volume-flow measurement

has bee defined. Totalizers can be assigned to drive relays. Relays can be set to open or

close at specified “slow” and/or “stop” counts for batch or sample control.

Output Signals

You can assign any measurement to the 4-20 mA current output, or the measurement

values can be sent to a remote terminal or host computer as serial data. The two contactclosure inputs can be used to activate any system command based on a user-provided

switch input (open or close). Two relay outputs are available on the optional AC

power/relay board.

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How to Use This Manual

This manual provides guidelines for planning the installation of your gauge, and

instructions for the hardware installation and wiring of the gauge. We suggest that you

read the appropriate chapters of this manual before you begin the installation of your

gauge.

Installation Instructions

Chapter 2 “Hardware Installation,” explains where and how to mount the gauge head

and transmitter.

Chapter 3 “Wiring Procedures,” explains wiring for the detector and transmitter, as

well as optional relays, current outputs, contact closure inputs, and serial communication.

Chapter 4 “Troubleshooting and Maintenance,” describes maintenance and

troubleshooting procedures for the gauge.

Addi tional Information

Appendix A “How to Return Equipment for Service,” provides shipping information

in case you should need to return equipment to Thermo for service.

Appendix B “Parts List,” - refer to this list if you need to order parts.

Appendix C “Specifications,” summarizes the system specifications.

Appendix D “Drawings,” lists the installation drawings and provides reduced-size

copies of drawings.

Configuring and Using the Gauge

When installation is complete, refer to the “DensityPRO Operation Manual” (717784) for

detailed instructions for configuring and operating your gauge.

Refer to the “DensityPRO/DensityPRO+ HART Operation Manual” (717816) for

detailed instructions for the set up and operation of the gauge via the HART protocol.

Refer to the “Model 9733/9734 Hand-Held Terminal Operation Manual” (717797) for

details on communicating with the gauge using the Thermo Hand-Held Terminal.

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Thermo Electron Technical Services

The Thermo Electron Technical Services Department is ready to assist you with any

installation or setup problems you may have with your gauge.

Main Office

Phone: 512-388-9100

800-736-0801 (USA only)

FAX: 512-388-9200

Emergency/After Hours:

512-388-9310 Radioactive Material Incidents

512-388-9320 Technical Support

Web Site: http://www.thermo.com

Address: Thermo Electron Corporation

Factory Service Department

2555 North IH 35Round Rock, Texas 78664

Canada

Phone: 905-888-8808

FAX: 905-888-8828

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Densi tyPRO Chapter 2 Hardware Installation


Chapter 2 Hardware Installation

This section provides guidance for mounting the density gauge. The gauge consists of the

detector-transmitter and the source head.

• Detector-Transmitter: Model 9719A (non-explosion proof) orModel 9720A (explosion proof)

• Source Head: Standard Model numbers include:

5200, 5201, 5202, 5203, 5204, and 5211.

Note: Reduced-size copies of the drawings referenced in this chapter areprovided in Appendix D for your convenience.

Licensing

Warning: The gauge is a nuclear device regulated by federal and/or stateauthorities. You are responsible for knowing and following the

pertinent safety and regulatory requirements. Refer to the CustomerRadiation Safety Manual (717821) for a summary of these requi rements.

Moving or removing an installed source housing, or any assembly thatincludes a source housing, requires a person who is specificallylicensed to install and commission Thermo Electron source heads.

Your general license permits you to own and install all of the gauge’s components,

including the source head. However, you may not commission the gauge (remove the

shipping bolt and open the source shutter for the first time) without a specific license

authorizing radiation commissioning of the gauge.

For assistance obtaining a specific license, commissioning, or decommissioning thegauge, contact Thermo Electron Technical Services.

FM/CSA Hazardous Location Approvals

The FM/CSA hazardous area approvals are listed below.

Warning: Do not locate the unit in any hazardous area other than those approved.

Refer to the equipment tag for the specific approvals applicable to theconfiguration of your gauge prior to installing the gauge.


• Class II, III, Div. 1, Groups E, F, G

• NEMA 4 / Type 4


• Class I, II, III, Div. 1, Groups B, C, D, E, F, G

• NEMA 4 / Type 4

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Chapter 2 Hardware Installation DensityPRO


Mounting the Gauge (Source and Detector-Transmitter)

Mounting Configurations

The optimum gauge mounting configuration depends on the application; however, the

source head and the detector are typically mounted together on the opposite sides of a

pipe. The following mounting options are supported for the instrument:

• Chain mount

− Single chain (unichain)

− Dual chain

• Cradle-type (saddle) clamp

• Pipe spool with gauge head pre-installed

• Z-pipe (axial) mount for small diameter pipes

The chain mount is the most frequently used mounting configuration this allows the unit

to be mounted on a range of pipe sizes using the same mounting hardware.

Note: Moving the gauge to a pipe with a different diameter may require changingthe radiation source size. Call Thermo for assistance.

Guidelines for Mounting the Gauge

• Power requirements for the detector-transmitter:

− 24 Vdc ±20%, 12VA, at detector input, or

− 12 Vdc ±30%, 12VA, (w/12-to24 Vdc converter option), or

− 115/230 Vac (±15%), 50/60 Hz, 12 VA (w/AC Power option).

• The operating temperature range is –40º C to 70º C (–40º F to 160º F).

•

Make sure there is enough clearance to install and service the gauge head. (Referto the appropriate drawings for your type of gauge and mount.)

• Position the gauge head so the radioactive source identification tag is visible.

Mount the source housing so the tag is upright.

• Avoid locations where process overflow, debris, or other material can collect in

the beam path (especially in the shutter mechanism).

Regardless of what mounting configuration is used, it is important to align the beam path

(the centerline of the source housing) as closely as possible with the centerline of the

detector housing. Be sure to mount the gauge head securely, since any movement or

change in alignment can affect the gauge’s calibration.

For best performance the beam must pass through a representative cross-section of the process material being measured.

• It is best to mount the gauge head on a vertical section of pipe. This keepssuspended solids from settling out of the measured area. (The gauge measures

only the material that passes through the beam.)

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• To mount the gauge head on a horizontal pipe –

− Position the beam path at a 30 to 45 degree angle from vertical. This position

tends to average density variations caused by settling, while reducing the

effect of any trapped gases or solids that accumulate in the top or bottom of

the pipe.

− If the process material is a solution, a light slurry, or a single-phase liquidthat will not separate, the gauge head can be mounted such that the beam is

horizontal.

• If the process material is a slurry, position the gauge head as far as possible from

any elbows, tees, or valves - these tend to separate suspended solids. Position the

beam path in the plane of the upstream elbow so the measurement includes any

uneven distribution caused by the fitting.

Figure 2.1 Gauge Installation Examples

Mounting Instructions

The following sections provide installation details for the various mounting

configurations.

Refer to the following drawings for detector dimensions.

• Drawing 866778 Model 9719A detector (NEMA 4 Housing)

• Drawing 866777 Model 9720A detector (Exp-Proof Housing)

Caution: Use proper lifting procedures during installation to avoid injury.

Do not over-tighten the bolts.

Single Chain (Unichain) Mounting Instructions

The single chain or unichain mount is only available with the Model 5211 source

housing. In this mounting configuration, a mounting chain is inserted through an eye bolt

in the rear of the source housing. The two ends of the chain are wrapped around the pipe

and engaged in slotted tabs in the detector housing.

X

XX

X - Improper Gauge Head Mounting

- Correct Gauge Head Mounting

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The following steps describe the installation of the gauge head using a single chain

mount. Also refer to the following drawings for mounting details.

• Drawing 867456 Model 9719A detector (NEMA 4 housing), or

• Drawing 867465 Model 9720A detector (explosion-proof housing).

The mounting hardware kit shipped with the gauge should include:

− 1 Eye Bolt (.500-13 x 3 in.), 1 Nut (.500-13), 1 Belleville Washer

− 1 Chain

1. Insert the eye bolt through hole in rear of source housing. Place Belleville

washer, cupped-side first, onto the eye bolt. Thread the nut on the eye bolt until

the bolt just begins to come through the nut.

2. Insert the chain through the eye bolt so that approximately the same length of

chain extends on each side of the eye bolt.

3. Position the source housing and detector housing so that the V-shaped mounting

features center the housings on the pipe.

4. With the axis of the source housing and detector housings aligned, attach one end

of the chain in the slotted tab on one side of the detector housing. Pull the chain

tight on the other side and attach it into the slotted tab on the other side of the

detector housing.

5. Maintain alignment of the housings and tighten the nut on the eye bolt ~1/2 turn

past point where Belleville washer becomes fully flattened.

Note: There must be an even number of chain links between the slotted tabs sothat there will be an equal number of links on both sides.

Dual Chain Mounting Instructions

In the dual chain mount, two mounting chains are wrapped around the pipe with their

ends engaging keyhole-shaped openings in the source head mounting plate. The detector

housing is then clamped to the two chains’ center links (opposite the source mounting plate) by tensioning bolt assemblies as illustrated in the photograph below.

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The following steps describe the installation of the gauge head using a dual chain mount.

Refer to the following drawings for mounting details.

• Drawing 867466 Model 9719A detector

• Drawing 867467 Model 9720A detector

1. Use the table on page 2-6 to determine the number of chain links to threadthrough the keyhole slots. Count the links and mark the links that will be engaged

at each end of the two chains (four links in all).

2. Partially assemble the two tensioning bolts (hardware kit 885826) in the

following order:

− 1 tensioning bolt (large),

− 1 chain - place center ring of chain over the bolt head,

− 1 bar nut - position the guard tube towards the bolt head,

− 1 special nut - thread nut securely onto the bolt end. After the special nut is

fully threaded, thread the bar nut back down the bolt so that it rests against

the special nut.3. From the pipe side of the source mounting plate, thread one end of a chain

through the plate’s top keyhole opening until you reach one of the four end links

you marked in Step 1. Engage this link by sliding it into one of the keyhole slots.

4. Thread one end of the other chain through the bottom keyhole and engage the

marked link as you did with the top chain.

5. Position the source housing mounting plate on the pipe. If necessary, use a lift,

hoist, or other means to hold it in position.

6. Pass the center part of the upper and lower chains around the pipe and thread

their ends through the corresponding keyholes. Engage the marked links in the

empty slots.

Note: All four chain ends must engage at the same link. To make an adjustment,adjust all four chain ends by the same amount. Make sure the chain doesnot twist as you wrap it around the pipe. You may have to adjust chain links(thread more or fewer links through each slot) to allow for pipe sizetolerance, insulation, and so forth. Start with about 10 cm (4 inches) of play.

7. Position the detector on the pipe, opposite the source mounting plate. If

necessary, use a lift, hoist, or other means to hold it in position.

8. To secure the detector and the source head mounting plate on the pipe:

− Position the upper chain (including the tensioning bolt assembled in Step 1)

over the detector’s top mounting arm.

−

Place a spacer ring and then two Belleville washers (concave sides together)onto the pilot end of the special nut.

− Insert the pilot end of the chain tensioning bolt into the hole in the top

detector mounting arm and tighten the chain tensioning bolt finger-tight.

− Repeat the previous three steps for the lower chain.

9. Alternately and uniformly tighten the chain tensioning bolts until the spacers are

just touching the mounting arms.

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10. Place the loose ends of the upper chain over the top edge of the source mounting

plate so they won’t interfere with the source housing installation.

11. Position the source housing so its four mounting holes engage the four studs on

the mounting plate. If necessary, use a lift, hoist, or other means to hold it in

position.

12. Use the provided lock washers and nuts to secure the source housing.

Table 2-1 Number of Chain Links to Engage for Dual Chain Mount

Use Chain Part No. 867103

Models 9719A &

9720A

Models 9719A &

9720A Pipe Size

(inches) Links

From

Center

Links

From

End

Links

From

Center

Links

From

End

2 7 23 6 24

2.5 7 23 6 243 8 22 7 23

3.5 8 22 7 23

4 9 21 8 22

5 10 20 9 21

6 12 18 11 19

8 14 16 13 17

10 17 13 16 14

12 20 10 19 11

14 21 9 20 10

16 24 6 23 7

18 25 5 24 6

Pipe Saddle (Cradle) Mounting Instructions

A pipe saddle mount (shown below) is a pair of identical mounting plates that are bolted

together on opposite sides of the process pipe.

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Refer to drawing 85726N and use the following steps to install a gauge head with a pipe

saddle mount:

1. Assemble the two halves of the saddle mount onto the process pipe using the

supplied nuts, bolts, and washers. Do not tighten the nuts and bolts yet, just

thread them together.

2. Adjust the saddle mount halves so the mounting plates are parallel and even witheach other. Then tighten the bolts evenly so the clamp ends are the same distance

apart on both sides of the pipe.

3. Bolt the detector and source housings to the mounting plates on either side of the

pipe saddle.

4. Tighten all bolts securely so the gauge head components cannot shift positions.

Pipe Spool Mounting Instructions

A pipe spool is normally a 30-inch section of pipe with either mounting plates or acomplete gauge head already installed. Often, the customer sends a length of the required

pipe to Thermo to be converted into a pipe spool mount.

Warning: Use correct pipe fitting techniques suitable for the pipe being used andthe process material that the p ipe will handle.

Use the following steps to install a gauge head with a pipe spool mount:

1. Assemble the pipe spool into the existing pipe.

2. Position the source housing so its identification tag is upright.

3. If the detector and source housings are not already installed, bolt them to the

mounting plates on either side of the pipe saddle.

4. Tighten all bolts securely.

Z-Pipe (Axial) Mounting Instructions

A Z-pipe mount is used for small pipes, four inches in diameter or less. It uses a Z-shaped

pipe section so the gamma rays can travel along the pipe’s axis for several inches. This

lets the beam pass through more process material so the material’s density can be

measured more reliably.

Depending on the application, the user typically fabricates the Z-pipe section and then

either assembles it into the mounting fixture or sends it to Thermo for assembly.

Fabricating and Assembling the Z-Pipe

To fabricate the Z-pipe, refer to the drawings for your specific application.

• Drawing 861104 Z Pipe Fabrication Details (1-3 in. pipe sizes)

• Drawing 864163 Z Pipe Fabrication Details (4 in. pipe)

Carefully note the tolerances for each dimension. Any variation in the Z-pipe dimensions,

especially in the bracket placement, can lead to misalignment causing inaccurate readings

or no readings at all.

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Z-Pipe Installation

Refer to the following drawings for mounting dimensions.

• Drawing 866670 Z Pipe Mount (1-3 in. pipe sizes)

• Drawing 864163 Z Pipe Mount (4 in. pipe)

Caution: If a lead doughnut is provided with the mounting assembly, make sureits inside diameter matches the pipe’s outside diameter.

While assembling the mount, clamp the doughnut to the axial portion ofthe Z-pipe (between the source and detector) as close to the center aspossible.

Warning: If the process pipe is not strong enough to support the gauge head andmounting assembly, you must provide additional support for the gaugehead.

After the pipe and mount are assembled, you can install the gauge head using the steps in

“Pipe Spool Mounting Instructions” on page 2-7, with the following additional notes:

• If your gauge is supplied with a large lead plate with a one- to two-inch hole in

the center, the plate should be mounted between the detector and the mounting

plate.

• If your gauge is supplied with a thin steel plate with a small lead disk, the plateshould be mounted between the source housing and the mounting plate, with the

disk towards the pipe (the disk should fit in the hole in the mounting plate).

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Densi tyPRO Chapter 3 Wiring Procedures


Chapter 3 Wiring Procedures

The detector-transmitter electronics includes the following boards.

• CPU / DC power board (required)

• AC power and/or relays board (optional)

This optional board is available in three configurations.

AC power with no relays

AC power with 2 relays

2 relays only

• Isolated, self-powered, 4-20 mA current output: an optional piggy-back board

that mounts on the CPU board.

The required wiring steps are:

• connect the power supply to the gauge, and

• connect a remote computer terminal or Hand-Held Terminal to the gauge via the

serial communication ports.

Additional, optional wiring may include:

• 4-20 mA current output,

• relay contacts,

• contact closure inputs,

• optional, remote display (two line by 16 characters),

• Flow sensor input (4-20 mA).

Wiring Instructions

The CPU board provides the connections for the system DC power input, the RS-232 andRS-485 serial ports, the current output, the contact closure inputs, and the optional

external display. All wiring must be done in accordance with applicable codes, using

approved conduit, boxes, and fittings.

Danger: 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/NFPA70 specifications or the Canadian Electrical Code Part 1.

Warning: Before wiring the gauge, verify that the source shutter is in the closed(OFF) position.

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Chapter 3 Wiring Procedures Densi tyPRO


Wiring Drawings

The Installation Layout drawing (868580) provides general guidance for routing the

cables to the unit. The installation wiring drawing (868578) describes the function and

wiring requirements for each connector on the CPU/DC power board and on the optional

AC power/relay board. The wiring drawing also shows cable requirements, power

requirements, and grounding locations.

The wiring label on the top of the detector-transmitter chassis also provides connector

wiring information for the CPU/DC power and the AC power /relay boards. Drawing

868519 provides additional instructions for wiring the RS-485 serial port.

Initial Wiring Preparations

Warning: Do not apply power to the unit in any hazardous area unless the safetyground is properly wired inside the unit and the cover is properlyinstalled.

Note: Connect the AC wiring Earth ground to the internal safety groundterminal as shown in the wiring diagram. Refer to “AC Power” on page3-3, if you need to change the AC supply voltage from 115 V to 230 V orvice versa.

Warning: Hazardous Location Installations – The cable entries must be sealedper the Installation Layout Drawing (868580).

Non-Hazardous Location Installations – The cable entries into theenclosures must be sealed to prevent passage of gas or vapors. Thesealing compound should not be affected by the surroundingatmosphere or liquids. The minimum thickness of the sealingcompound should be 5/8 in (16 mm).

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

Use the following procedure for wiring the detector-transmitter:

1. Make sure all source shutters are in the “OFF” position.

2. Make sure all power to the gauge is turned off.

3. Remove the housing access cover. Loosen the screw on the cover retaining

bracket and slide the bracket off of the housing cover. Unscrew the housing

access cover (two lugs are provided on the top of the cover to aid in the removal

of the cover).

4. Remove the cable conduit plugs only from the hole(s) that will be used. As

shown in the installation layout drawing, lay one conduit for the DC power inputand signal cables, and if applicable, a second conduit for the AC power input and

relays. Route the cables into the detector housing and connect the input power

and signal wires as shown in the installation wiring diagram.

5. Pull each cable through the correct conduit fitting and into the enclosure. Leave

approximately 150 mm (6 inches) for strain relief. Secure the conduit, making

sure it is completely sealed.

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6. To complete the wiring of the detector-transmitter, follow the procedures

described in the “Power Supply Wiring” and the “Board Wiring” sections below.

7. When the wiring is complete, replace the detector housing cover and secure the

cover retaining bracket.

Power Supply Wiring

The maximum input power requirement is 6 VA.

Note: To meet the requi rements of CSA 1010.1, an external switch or circuitbreaker must be installed to allow the power source to be disconnectedfrom the gauge. In addition, protective bond ing (grounding) must always beprovided, even if a DC power source is used.

DC Power

The Model 9719A/9720A scintillation detector is designed to operate on 24 Vdc (± 20%).

When the optional 12-to24 Vdc converter board is installed, the detector can operate on12 Vdc (± 30%). In either case, the input connector for the DC source voltage wiring is

located on the CPU board. Refer to the installation wiring drawing.

Note: To meet the requirements of CSA 1010.1, the input DC terminals shall besupplied from an SELV (Safety Extra Low Voltage) source.

AC Power

If the optional AC power board is installed, the gauge may be operated using either 115

or 230 Vac. The AC supply voltage is set by the 115/230 Vac selector switch on the AC power board.

Warning: Applying 230 Vac with the selector switch in the 115 Vac position wil ldamage the equipment.

The AC selector switch is located behind (below) the connectors on the top edge of the

AC power/relay board. To access the selector switch, it is necessary to remove the screws

that hold the detector-transmitter unit in the housing and lift the detector-transmitter unit

several inches out of the housing.

Caution: For reliable operation and to maintain safety approval, the F1 fuse on

the AC power board must only be replaced with an approved fuse.Refer to the Installation Wiring Diagram, Drawing 868580.

If both AC and DC input power are supplied to the detector, the detector will draw power

from whichever source provides the higher DC voltage.

!

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Board Wiring

DANGER: 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 withNational Electric Code (NEC) ANSI/NFPA 70 specifications or theCanadian Electrical Code Part 1. For intrinsically safe systems, refer to

ANSI/ISA RP 12.6.

If metal conduit is used, it must be grounded.

After completing the initial wiring preparations, use the following procedure to complete

the wiring of the detector-transmitter. For each cable to be connected, refer to the wiring

label on the top of the chassis or to the installation wiring diagram. You will need a

screwdriver with a 1/8-inch blade to connect the wires to the screw terminal connectors.



3. To remove the housing access cover, loosen the screw on the cover retaining

bracket and slide the bracket off of the housing cover. Then, unscrew the housing

access cover (two lugs are provided on the top of the cover to aid in removal).

4. Connect the cable to the appropriate connector on the board as follows:

− Remove the screw–terminal connector from the on-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.

− Loosen the terminal screws on the connector. Insert the wires into the

connector and make connections as shown in the installation wiring drawing.

− Tighten the terminal screws to secure the wires. Replace the connector on the

board when all wires are secured.

5. Install the housing cover. For the explosion-proof enclosure, secure the cover

retaining bracket.

Serial Communications

The gauge provides both an RS-232 single-drop and an RS-485 multi-drop serial

interface. Screw-terminal connectors for both ports are located on the CPU board.

The RS-485 connector includes the +8 Vdc required to power the Thermo Hand-Held

Terminal (HHT) as well as the +Data and –Data connections. An RJ-11 (phone jack)

connector is also provided for the RS-485 port. The HHT can be connected directly to theRJ-11 connector.

Both the RS-232 and RS-485 ports provide independent access to the measurement

readings and software functions. Both ports are always active and can be used to display

measurements. The Setup Menus, however, can only be accessed by one port at a time.

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RS-485 Wiring

To connect the serial (COM) port on a PC to the RS-485 port on the gauge requires an

RS-485-to-RS-232 converter (Thermo part no. 670045).

• Connect +Data and –Data on the RS-485 connector (located on the CPU board)

to the corresponding connections on the RS-485-to-RS-232 converter.

• Connect the RS-485-to-RS-232 converter to the PC using a standard DB-9 serial

cable.

Refer to the RS-485 installation wiring drawing (868519) and the Wiring drawing

(868578) for details.

Note: Party-line Communications – Initial Setup!

To communicate with multiple gauges via an RS-485 party-line, eachunit must be assigned a unique unit identification number so it can beaddressed individually. All gauges are assigned unit number 0 (zero) bydefault.

To assign a unique unit number to each gauge, you must be able tocommunicate with each gauge individually. You must be able todisconnect each gauge from the party-line in turn and thencommunicate with the disconnected gauge directly. Alternately, youmust remove power from all gauges except one, then assign a unitnumber to the single powered gauge. Repeat this procedure for theremaining gauges.

Note: If you have trouble using another device on the RS-485 chain, verify that itis properly terminated for its pos ition on the chain. To terminate a device,

connect a 120 resistor between its RS-485 +/– data terminals. Neverterminate more than the first and last device in the chain.

RS-232 Wiring

The serial port on a PC (COM1 or COM2) can be connected directly to the RS-232 port

on the gauge. This requires five wires - ground, transmit (TX), receive (RX), RTS and

CTS. The connections between the gauge RS-232 port (J3 connector) and the PC serial

port are summarized in the table below for standard DB-9 and DB-25 PC serial port

connectors.

DensityPRO Gauge

J3 Connector

PC Serial Port

DB-9 Connector

PC Serial Port

DB-25 Connector

J3-2 RX Pin 3 Pin 2J3-3 TX Pin 2 Pin 3

J3-4 RTS Pin 8 Pin 5

J3-5 CTS Pin 7 Pin 4

J3-6 GND Pin 5 Pin 7

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Using Serial Communications

To communicate with the gauge from a PC requires that the PC be running TMTComm

for Windows communications software or other terminal emulation software.

The default communication settings for the RS-232 and RS-485 ports of the gauge and

for the Thermo Hand-Held Terminal are:

• 7 data bits,

• even parity,

• 1 stop bit, and

• 9600 baud data rate.

Refer to the user guide for additional details about setting up and using serial

communications.

HART Communications

The HART communication protocol is supported over the 4-20 mA current output with

an optional daughter board. You communicate with the gauge using the standard Fisher

Rosemount 275 HART handheld communicator. Refer to the “DensityPRO HARTOperation Manual” (717816) for detailed instructions.

Current Output

The current output is programmable between 0 and 20 mA; however, the minimum

current output is ~3 mA. The maximum load is 800 ohms. Refer to the installation wiring

diagram (Drawing 868578) for details.

The default configuration for the current output is isolated, loop-powered. A jumper is placed across pins 4 and 5 of the 14-pin header J7, located below the RS-484/RS-232

connectors on the CPU.

• Connect the +24 Vdc loop-power input to Pin 7 of connector J10.

• Connect the +Iout (current output) signal, Pin 6 of J10, to one side of the user

load.

• Connect the other side of the user load to the return of the 24 V loop-power

supply.

Alternately, the current output can be reconfigured as a non-isolated system-powered

output by moving the jumper from pins 4 and 5 to pins 3 and 4 on header J7.

To configure the current output as isolated, system-powered, remove all jumpers from J7

and install the optional daughter board, Thermo P/N 886595.

Flow Input

There is also provision on the CPU board for a user-provided 4-20 mA Flow (AUX)

input (pins 1/2 of connector J10). Refer to the user guide (717784) for details on how to

configure the gauge to use the flow input signal.

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Relays

Two relays can be provided as an option on the AC power/relay board. (A factory-

installed jumper across pins 4 and 5 of header J11 indicates to the gauge that the optional

relays are installed. Refer to the installation wiring drawing (and the wiring label on top

of the detector-transmitter chassis) for wiring details. Relay contacts are Form C SPDT,

isolated 8 A, and 220 Vac.

Contact Closure (Switch) Inputs

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

user guide (717784) for instructions for assigning commands to the contact closure

inputs.

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Densi tyPRO Chapter 4 Troubleshooting and Maintenance


Chapter 4 Troubleshooting and Maintenance

The Thermo Electron Technical Services Department is ready to assist you with any

problems you may have with your gauge. Thermo Electron provides Field Service,

Factory Service, and replacement parts. Experienced service representatives are availableto help. A 24-hour phone number is provided for emergency service calls.

Source Housing

Periodically check the source and remove any debris that may have accumulated in the

beam path between the source housing and the outer wall of the process vessel.

Warning: Do not place your hand between the source and the tank. Use a brushor other tool to remove any accumulated debris.

Also check the shutter to make sure it works correctly. For source housings with anexposed shutter lever pivot, you can apply grease to the pivot if necessary to prevent

corrosion and jamming.

Note: Do not paint or overcoat the source housing without first masking itsidentification tag and other labeling. All labels on the source housing mustremain visib le.


Danger: Remove all power from the unit before servicing. Electrocut ion canresult if power is present.

In hazardous locations , ensure that power is removed from the detectorbefore removing the housing cover. Be sure that the housing cover hasbeen replaced and that the grounds are properly connected beforereapplying power.

Caution: Close the shutter on the source housing before servicing the detectorunit.

AC Power Supply Fuse

Caution: For reliable operation and to maintain safety approvals, the F1 fuse onthe AC power board must be replaced with an approved fuse. See theInstallation Wiring Diagram (868578) or Appendix B “ Parts Li st.”

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Chapter 4 Troubleshoot ing and Maintenance DensityPRO


Adding or Replacing Boards

The detector-transmitter includes the following boards.

• CPU / DC power board (required)

• AC power and/or relays board (optional)

This optional board is available in three configurations.− AC power with no relays

− AC power with two relays

− Two relays only.

• Isolated, self-powered, 4-20 mA current output - optional piggy-back board that

mounts on the CPU board.

Use the following procedure to access the detector-transmitter electronics:



3. Remove the housing access cover.

− For the explosion-proof housing, loosen the screw on the cover retaining

bracket and slide the bracket off of the housing cover. Then unscrew the

housing access cover.

− For the non explosion-proof housing, remove the bolts that attach the

housing cover to the enclosure.

4. Disconnect the plug-in screw terminals from the board connector. If the

connector is tight, brace the board with your hand (but do not touch the circuit or

components) and pull firmly but carefully. Lay the cables and connectors back

over the edge of the housing, so they will not be in the way when lifting the unit

out of the housing.

5. Remove the screw that secures the unit in the housing. Using a pull and turn

motion, lift the unit a few inches out of the housing, so that the electronics boards

are exposed.

Factory Wiring

The detector board (positioned horizontally under the top of the electronics chassis)

mounts on the photomultiplier tube. A factory-installed cable connects the detector board

to the J2 connector on the CPU board.

If the optional AC power board is installed, a factory-installed cable connects the J3

connector on the AC power board to the J9 connector on the CPU board.

If the optional 12-to-24 Vdc converter board is installed (located below the CPU board),

a factory-installed cable connects the J2 connector on the 12-to-24 Vdc converter board

to the J15 connector on the CPU board.

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Densi tyPRO Chapter 4 Troubleshooting and Maintenance


Current Output Jumper Settings

The default configuration for the current output is isolated, loop-powered. A jumper is

placed across pins 4 and 5 of the 14-pin header J7, located below the RS-484/RS-232

connectors on the CPU.

Alternately, the current output can be reconfigured as a non-isolated system-poweredoutput by moving the jumper from pins 4 and 5 to pins 3 and 4 on header J7.

To configure the current output as isolated, system-powered, remove all jumpers from J7

and install the optional daughter board, Thermo P/N 886595.

Current Output Problems

If you suspect a problem with the current output, attach an ammeter in series with the

current output load and verify the current output at various levels. Use the commands in

the “User service & related items” submenu, located under the “Security, service, and

diagnostic functions” top-level menu, to hold the current output at specific levels for

testing (Refer to Chapter 9 of the user guide for details).

Relay Problems

If you suspect a problem with a relay output, you can attach a continuity tester to the

suspected relay output and use the “Test relays” commands to test relay operation. (Refer

to Chapter 9 of the user guide for details.)

TroubleShooting

Note: Enable the “ service-only items” in the “ Special functions” menu beforeproceeding with this section. Refer to Chapter 9 of the user guide for

details on the service-related menus.

If you suspect a detector problem, you can quickly check the detector output using the

“Internal value of sensor signal” item in the “Snapshot” menu (Direct Entry Code

112003). This value (count rate in counts per second) should be much larger with the

source shutter ON than with the shutter OFF (typically more than 10 times larger).

As a further check, if standardization has been completed, set up the standard

configuration and compare the “Internal value of sensor signal” to the “STD value in use”

(Direct Entry code 121003) displayed in the “Sensor standardization” submenu of the

“Gauge fine tuning” menu. If the gauge was working properly when standardized, the

two values should be similar.

If the displayed signal value is not behaving correctly, be sure to consider misalignment

of the gauge head, buildup or wear, debris in the beam path, or faulty shutter operation

before testing the detector signals.

If you can eliminate these other factors, the cause is probably on the CPU board. Verify

that the connectors on the cable connecting the detector board to the CPU board are

securely seated on both boards. If the problem remains, call Thermo Electron Technical

Services for assistance.

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DensityPRO Appendix A Returning Equipment for Service

Thermo Electron Corporation A-1

Appendix A How to Return Equipment for Service

Call the Thermo Electron Technical Services Department (Factory Service division)

before returning equipment for repair. Many problems can be diagnosed and resolved

over the phone.

Main Office

Phone: 512-388-9100

800-736-0801 (USA only)

FAX: 512-388-9200

Emergency/After Hours:

512-388-9310 Radioactive Material Incidents

512-388-9320 Technical Support

Canada

Phone: 905-888-8808

FAX: 905-888-8828

For all units returned for repair, please include the following:

1. Specific information about the problem.

2. A contact name and phone number, in case we need more information.

3. A purchase order authorizing repairs, or a request for a quote.

4. Ship prepaid to the address below:

Thermo Electron Corporation

Factory Service Department2555 North IH 35

Round Rock, Texas 78664

Our Receiving Department will not accept collect shipments.

Do not ship to our P. O. Box.

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DensityPRO Appendix B Parts List

Thermo Electron Corporation B-1

Appendix B Parts List

Use the following list of part numbers to order spare parts for the gauge. Call Thermo for

pricing and assistance.

Thermo Part Number Description

886670-2 Processor (CPU) Board

886592 Detector Board

886595ISO-24 Piggyback Board – optional board for

isolated, self-powered current output

886568-1 AC Power Board, 0 Relays

886568-2 AC Power Board, 2 Relays

868568-3 Board w/ 2 Relays, No AC Power

AC Power Board Fuse (F1) –

250V, 0.125A (1/8A SB), 3AG

886594 12-to-24 Vdc Converter Board

886609 Temperature Compensation Board

886671-3 HART Interface Board

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DensityPRO Appendix C Specifications

Thermo Electron Corporation C-1

Appendix C Specifications

Operating Princ iple

Gamma radiation from the source passes through the

process pipe and material. The amount of radiation

reaching detector decreases as the process levelincreases.

Power Supply

DC Power

24 Vdc ±20%, 12 VA standard.

12 Vdc ±33%, 12 VA, with 12-to-24 V converter

board option. (Not available with AC Power option.)

AC Power

115 / 230 Vac ±15%, 50/60 Hz, 12 VA, with AC

power board option. 115 / 230 Vac selection switchlocated on AC bower board. (Not available with 12

Vdc power option.)

FM / CSA Approvals

Non-explosion proof (9719A):

Class II, Div. 1, Groups E, F, GClass III, Div. 1

NEMA 4, Type 4

Explosion proof (9720A):

Class I, Div 1, Groups B, C, D

Class II, Div 1, Groups E, F, GClass III

NEMA 4, Type 4

Dimensions

Non-explosion proof (9719A):

6.5 in. diameter x 14 in. tall(165 mm diameter x 360 mm tall)

Explosion proof (9720A):

6.5 in. diameter x 15 in. tall(165 mm diameter x 380 mm tall)

Operating Temperature

-40O to 70O C (-40O to 160O F)

Serial Interface

Serial ports allow input and output of all displayable

settings and measurements.

RS-232: Full duplex communication with a remoteterminal, printer, PC or host computer.

RS-485: Half-duplex party-line communicationamong multiple gauges or between gauge and remote

terminal or Thermo Hand-Held Terminal.

HART Communications

HART Communications protocol supported over the

4-20 mA current output, an optional HART interface

board is required. You communicate with the gaugeusing a standard Fisher Rosemount 275 HART

handheld communicator.

Current Output

Standard Configuration:Isolated, Loop-powered, 24 Vdc Nominal

Supply Voltage, 700 ohm max. load

Alternate Configurations:

Non-isolated, Self-Powered,

700 ohm max. load

orIsolated, Self-Powered,

700 ohm max.

(requires optional piggy-back board)

Relays

Two relays (optional);Form C SPDT isolated, 8 amp, 220 VAC.

Contact Closure Inputs

Two contact closure inputs – can be programmed to

execute commands based on user-provided input.

Display

Optional two-line backlit external display.

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Densi tyPRO Appendix D Drawings

Thermo Electron Corporation D-1

Appendix D Drawings

The following is a complete list of available drawings for the gauge. Drawings are

reproduced in the order listed below on the following pages.

Installation Layout & Wiring

868580 Customer Drawing, Installation Layout DensityPRO, Model 9719A/9720A

868578 Customer Drawing, Installation Wiring, DensityPRO, Model 9719A/9720A

868519 RS-485 Installation & Wiring

Mechanical - Detectors

866778 Mounting Dimensions, Model 9701 (Ion Chamber), NEMA 4 Housing

866777 Mounting Dimensions, Model 9702 (Ion Chamber), Explosion Proof Housing

867468 Installation Dwg, Detector Assembly, Flat Mount, NEMA 4 Housing

867469 Installation Dwg, Detector Assembly, Flat Mount, Exp-proof Housing

867456 Installation Dwg, Source/Detector Assembly Single Chain Mount, NEMA 4 Housing867465 Installation Dwg, Source/Detector Assembly Single Chain Mount, Exp-proof Housing

867466 Installation Dwg, Source/Detector Assembly Two Chain Mount, NEMA 4 Housing

867467 Installation Dwg, Source/Detector Assembly Two Chain Mount, Exp-proof Housing

867172 Installation, Gauge Head, Model 9701/9702 Ion Chamber Detector, Two Chain Mount

85726N Installation Dwg, Gauge Head, Pipe Saddle Mount

861104 Fabrication Details, 1 inch - 3 inch Z-Pipe Section

866670 Mounting Dimensions, 1 inch - 3 inch Z-Pipe Mounting Configuration

864163 Fabrication Details, 4 inch Z-Pipe Section

866705 Mounting Dimensions, 4 inch Z-Pipe Mounting Configuration

Mechanical – Source Heads864563 Mounting Dimensions, Source Housing, 100 mCi or Less (Model 5200)

865453 Mounting Dimensions, Source Housing, 100 mCi or Less (Model 5201)




Source Housing Options

866666 Mounting Instructions, Remote Manual Actuator, Model 5201-5204 Source Housings

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Appendix D Drawings DensityPRO

D-2 Thermo Electron Corporation

868580, Customer Drawing, Installation Layout Densi tyPRO, Model 9719A/9720A

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8 6 8 5 7 8 ,

C u s t o m e r D

r a w i n g ,

I n s t a l l a t i o n W i r i n g ,

D e n s i t y P R O ,

M o d e l 9 7 1 9 A

/ 9 7 2 0 A

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868519, RS-485 Installation & Wiring

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866778, Mounting Dimensions, Non-Explosion Proof Detector

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866777, Mounting Dimensions, Explosion Proof Detector

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867468, Installation Dwg, Detector Assembly, Flat Mount, NEMA 4 Housing

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867469, Installation Dwg, Detector Assembly, Flat Mount, Exp-proof Housing

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DensityPRO Appendix D Drawings


867456, Installation Dwg, Source/Detector Assembly Single Chain Mount, NEMA 4Housing

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867465, Installation Dwg, Source/Detector Assembly Single Chain Mount,Exp-proof Housing

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DensityPRO Appendix D Drawings

867466, Installation Dwg, Source/Detector Assembly Two Chain Mount, NEMA 4Housing

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867467, Installation Dwg, Source/Detector Assembly Two Chain Mount, Exp-proofHousing

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867172, Installation, Gauge Head, Model 9701/9702 Ion Chamber Detector, TwoChain Mount

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85726N, Installation Dwg, Gauge Head, Pipe Saddle Mount

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861104, Fabrication Details , 1 inch - 3 inch Z-Pipe Section

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866670, Mounting Dimensions, 1 inch - 3 inch Z-Pipe Mounting Configuration

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864163, Fabrication Details , 4 inch Z-Pipe Section

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866705, Mounting Dimensions, 4 inch Z-Pipe Mounting Configuration

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864563, Mounting Dimensions, Source Housing, 100 mCi or Less (Model 5200)

7/24/2019 717774-A DensityPRO





7/24/2019 717774-A DensityPRO



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7/24/2019 717774-A DensityPRO


Thermo Electron Corporation81 Wyma n StreetP.O. Box 9046

Wa ltham, M assach usetts 02454-9046United States

www.thermo.com

717774-a densitypro

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