Cameron Barton 752 User Manual

BARTON
®
MODEL 752 & 752A
DIFFERENTIAL PRESSURE
TRANSMITTERS
For Nuclear Service
User Manual
Part No. 9A-C10820, Rev. 02
November 2015
Contents
Safety ............................................................................................................ 2
Section 1—Introduction ................................................................................. 3
General ......................................................................................................... 3
Product Description....................................................................................... 3
Differential Pressure Unit ......................................................................... 3
Electronic Transmitter................................................................................ 4
Power Supply ............................................................................................ 4
Zero and Span Control.................................................................................. 4
Zero Control .............................................................................................. 4
Span Control ............................................................................................. 5
Specications ............................................................................................... 5
Qualication............................................................................................... 7
Section 2—Theory of Operation .................................................................... 9
Basic Components ........................................................................................ 9
Differential Pressure Unit (DPU) ............................................................... 9
Electronic Transmitter...............................................................................11
Basic Operation ...........................................................................................11
Surge Voltage Protection Circuit .............................................................11
Reverse Polarity Protection ......................................................................11
Regulator ..................................................................................................11
Strain Gage Bridge Network ................................................................... 12
Signal Amplier........................................................................................ 12
Current Amplier...................................................................................... 12
Temperature Compensation........................................................................ 12
Section 3—Installation, Startup, and Shutdown ........................................ 13
Overview ..................................................................................................... 13
Unpacking/Inspection.................................................................................. 13
Initial Calibration Check .............................................................................. 13
Mounting ..................................................................................................... 13
Wall or Rack Mounting ............................................................................ 13
Piping Guidelines ........................................................................................ 14
Electrical Connections ............................................................................... 14
Loop Resistance Calculations ................................................................. 16
Maximum Loop Resistance ..................................................................... 17
EMI/RFI Shielding ....................................................................................... 17

Cameron Barton 752 Specifications

General

Brand	Cameron
Model	Barton 752
Category	Transmitter
Language	English

Summary

Safety

Section 1—Introduction

Differential Pressure Unit

Electronic Transmitter

Power Supply

Details requirements for the DC power supply and voltage calculations.

Zero and Span Control

Explains the use of potentiometers for zero and span adjustments.

Specifications

Lists technical specifications like input range, output, accuracy, etc.

Qualification

Details IEEE-344 qualification testing for seismic accelerations.

Section 2—Theory of Operation

Differential Pressure Unit (DPU) Description

Electronic Transmitter Functionality

Section 3—Installation, Startup, and Shutdown

Initial Calibration Check

Transmitter Mounting Guidelines

Guidelines for mounting the transmitter in a horizontal position.

Piping Guidelines

Practices for piping for flow and liquid level applications.

Electrical Connection Procedures

Steps for completing field wiring with diagrams.

Loop Resistance Calculations

Method for calculating total loop resistance for power supply.

Maximum Loop Resistance Examples

Examples of maximum loop resistance calculations.

Startup Procedure

Step-by-step guide to operating the transmitter.

Shutdown Procedure

Steps to safely shut down the transmitter.

Section 4—Calibration and Maintenance

General Maintenance Procedures

Calibration Process

Covers calibration checks, test equipment, and electrical connections.

Calibration Test Equipment

Calibration Electrical Connections

Calibration Checkpoints

Expected output values at various pressure checkpoints.

Calibration Procedure Steps

Step-by-step guide for performing calibration.

DPU Inspection and Cleaning

Troubleshooting DPU Issues

Guidance for diagnosing and resolving issues with the DPU.

Appendix A

Safety Precautions

Warnings and precautions for high-pressure and explosion hazards.

Typical Piping and Startup Examples

Product Warranty

Warranty Terms

Warranty Adjustment Procedure

Warranty Exclusions