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Fairchild TT7800 - User Manual

Fairchild TT7800
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1
FAIRCHILD T7800 EXTENDED RANGE
MINIATURE ELECTRO-PNEUMATIC TRANSDUCER
Installation, Operation and Maintenance Instructions
The Model T7800 Series of Electro-Pneumatic Trans-
ducer converts a DC input signal to a linearly proportional
pneumatic output pressure.
GENERAL INFORMATION
SPECIFICATIONS
Figure 1. Model T7800 Extended Range Transducer Identification Number System.

Questions and Answers

  • P
    perezmarcusAug 3, 2025
    What to do if my Fairchild TT7800 has erratic operation?
    • K
      Katrina MaddenAug 3, 2025
      If your Fairchild Transducer is operating erratically, there are a couple of things to check: * **DC Signal:** Make sure to inspect all wires and connections for any looseness. * **Liquid in Air Supply:** Examine the air supply for any presence of liquid.
  • B
    Bryan MaxwellAug 11, 2025
    Why is the span adjust low on my Fairchild Transducer?
    • M
      Matthew WardAug 12, 2025
      If you're experiencing a low or improper span adjust on your Fairchild Transducer, it might be due to low supply pressure affecting the zero and span adjustments. Check for any output leakage.
  • D
    dmcphersonAug 18, 2025
    How to fix leakage on a Fairchild TT7800?
    • J
      Jessica AndersonAug 18, 2025
      If you notice leakage in your Fairchild Transducer, carefully inspect all connections to ensure they are properly secured.
  • T
    thomasericAug 26, 2025
    What to do if a Fairchild TT7800 Transducer has no output?
    • B
      Benjamin CurtisAug 26, 2025
      If your Fairchild Transducer has no output, the cause may be related to supply pressure. Begin by checking for a clogged orifice.

Summary

Specifications

Performance Specifications

Outlines accuracy, hysteresis, deadband, repeatability, and environmental effects.

Hazardous Area Classification

Details approvals and classifications for hazardous locations (FM, CSA, ATEX).

Installation

Pneumatic and Electrical Connections

Electrical Connection Methods

Details how to make electrical connections using terminal blocks, conduit connectors, or DIN connectors.

Hazardous Area Wiring Practices

Specifies wiring practices for hazardous locations according to country and agency standards.

Calibrations and Adjustments

Full Range Operation Calibration

Steps for calibrating zero and span for forward and reverse acting modes.

Maintenance and Troubleshooting

Trouble-Shooting Guide

Table listing common problems, their potential causes, and solutions.

Fairchild TT7800 Specifications

General IconGeneral
BrandFairchild
ModelTT7800
CategoryTransducer
LanguageEnglish

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