ITT BARTON 763A User Manual (English)

Questions and Answers:

G
Glenn LawrenceAug 4, 2025
Why is there no output from my ITT Transmitter?
- G
  Gabrielle JonesAug 4, 2025
  If your ITT Transmitter has no output, several factors could be responsible. It could be a problem with the power source, so try replacing the fuse or repairing the power supply. The transmission cable might be faulty; in this case, tighten the terminal connection or replace any broken wire. A faulty receiver or load might also be the cause, so replace the fuse and repair or replace the receiver or load. Finally, the transmitter itself could be the issue; try tightening the terminal, reversing the power connection, or returning it to the factory for repair.
M
Monica StoutAug 13, 2025
What to do if my ITT BARTON 763A is operating erratically?
- C
  Cindy AtkinsAug 13, 2025
  If your ITT Transmitter is operating erratically, check the terminal connections and tighten or clean them as needed. Inspect the electronic component connector assembly; remember that only a complete assembly can be checked, and any other repairs require factory service. Also, check and tighten all process and mechanical connections. If the issue persists, the strain gauges might be the problem, requiring a return to the factory for repair.
P
Paula JacksonAug 23, 2025
How to fix ITT Transmitter that zeros but cannot get full output?
- C
  Christian AdkinsAug 23, 2025
  If your ITT Transmitter 'zeros' but cannot achieve full output, several potential issues exist. A faulty power source could be the culprit, so repair the power source. The load resistance might be incorrect, requiring you to replace or repair it. You should also measure the cable loop resistance of the transmission cable. Other potential causes include a faulty electronic module, which requires returning it to the factory for repair, a problem with the range selector (check the circuit and operating procedure, and clean and tighten terminal connections), a defective strain gage beam (return to the factory for repair), or issues with the pressure line (determine the source by closing valves and monitoring for pressure decay).

ITT BARTON 763A Specifications

General

Process Temperature Limits	-40 to 250°F (-40 to 121°C)
Ambient Temperature Limits	-40 to 185°F (-40 to 85°C)
Type	Differential Pressure Transmitter
Operating Temperature	-40 to 185°F (-40 to 85°C)
Wetted Materials	316L Stainless Steel
Accuracy	±0.25% of span
Output	4-20 mA
Power Supply	12 to 42 VDC
Housing	NEMA 4X
Process Connection	1/4" NPT
Electrical Connection	1/2" NPT

Summary

Introduction to Barton Model 763A Gage Pressure Transmitter

General Overview

Overview of the transmitter's function and application context.

Product Description

Details on the transmitter's physical and functional characteristics.

Gage Pressure Transducer Assembly

Description of the Bourdon tube sensing element and its construction.

Electronic Transmitter

Explanation of the transmitter's electronic components and output signal.

Power Supply Requirements

Requirements for the DC power supply needed to operate the transmitter.

Specifications

Technical specifications including performance, accuracy, and environmental ratings.

Performance Details

Detailed performance metrics like available spans, output, and accuracy.

Application in Harsh Environments

Information on the transmitter's suitability for harsh environments and nuclear service.

Storage Guidelines

Guidelines for proper storage of the transmitter to maintain its condition.

Theory of Operation for Pressure Transmitter

Basic Components

Overview of the main parts of the pressure transmitter system.

Gage Pressure Sensing Element

Explanation of the Bourdon tube's function in sensing pressure.

Electronic Transmitter Function

Description of the electronic circuit that converts sensor output to a signal.

Basic Operation and Current Flow

How the transmitter operates within a loop, detailing current flow.

Regulator Circuit Stage

Function of the circuit stage regulating loop current and providing stable voltage.

Strain Gage Bridge Network

Components of the bridge network including strain sensors and compensation.

Signal Amplifier Role

Role of the amplifier in boosting the bridge network output voltage.

Current Amplifier Function

How the amplifier converts amplified voltage into a proportional output current.

Installation and Operation Guide

Unpacking and Inspection

Procedures for inspecting the instrument upon receipt for shipping damage.

Pre-Operating Instructions

Essential steps before operation to ensure calibration and proper function.

Mounting Procedures

Guidelines for physically mounting the transmitter securely and correctly.

Vibration Minimization

Recommendations for minimizing vibration impact on the instrument.

Piping Best Practices

Best practices for connecting the transmitter to the process pressure source.

Piping Slope Requirements

Requirements for pipe slope to prevent liquid or gas entrapment.

Process Temperature Considerations

Precautions for high process temperatures and required pipe insulation.

Pulsation Effects

Importance of minimizing pressure pulsation for accurate readings.

Electrical Connections and Wiring

Critical information on wiring the transmitter to the power supply and receiver.

Load and Line Resistance Calculations

Methods and examples for calculating required loop resistance values.

EMI/RFI Shielding Precautions

Precautions and recommendations to mitigate electromagnetic interference.

Initial Calibration Adjustments

Steps for adjusting the transmitter's calibration after storage or installation.

Calibration Check Procedure

Procedures for verifying the transmitter's output against specified values.

Startup Procedure

Step-by-step guide to safely bring the transmitter online.

Shutdown Procedure

Step-by-step guide to safely take the transmitter offline.

Maintenance and Troubleshooting

General Field and Periodic Maintenance

Overview of maintenance requirements, primarily calibration checks.

Periodic Calibration Guidelines

Guidelines for recommended calibration intervals and procedures.

Transmitter Cover Removal

Detailed instructions for safely removing the transmitter cover.

Transmitter Cover Reinstallation

Procedures for correctly reinstalling the transmitter cover and O-ring.

EGS Quick Disconnect Connector Operation

Instructions for connecting and disconnecting the EGS quick disconnect assembly.

Leadwire and Connector Replacement

Information on replacing leadwires and connector assemblies.

EGS Quick Disconnect Connector Removal

Steps to remove the EGS Quick Disconnect connector assembly.

EGS Quick Disconnect Connector Installation

Steps to install the EGS Quick Disconnect connector assembly.

Barton Style Connector Assembly Removal

Procedures for removing the older Barton style connector assembly.

Barton Style Connector Assembly Installation

Procedures for installing the Barton style connector assembly.

Troubleshooting Common Issues

Guide to diagnosing and resolving common problems with the transmitter.

Assembly Drawing and Parts List

Dimensional Drawings of Transmitter

General Dimensional Information

Introduction to the outline dimensions and drawings of the transmitter.

Product Warranty Information

Manufacturer's Warranty Statement

Statement of the manufacturer's warranty terms for the product.

Warranty Adjustment Process

Process for handling warranty claims, including repair or replacement.

Warranty Exclusions

Conditions and circumstances under which the warranty is voided.

Product Brand Trademark

Information on the registered trademark "Barton".

ITT BARTON 763A User Manual

Table of Contents