Omega TX91 manual Troubleshooting Guide, Current rating on the power supply

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5Troubleshooting Guide

Malfunction or incorrect operation may be caused by:

1.Reversed polarity:

Check the wiring using Figure 3-5 as a guide. If the temperature of the thermocouple increases while the current magnitude decreases, the problem could caused by reversed polarity of the:

a)thermocouple wiring

b)power supply leads

c)monitor instrument

2.Loose or broken wires:

Check each terminal connection for tightness. Move each wire back and forth and note any changes in operation.

3.Too high a load resistance in the output current loop or too low

a current rating on the power supply:

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Contents User’sGuide Servicing North America Return Requests / Inquiries Introduction Calibration Instructions General Description IntroductionIntroduction TX91 Thermocouple Transmitter Introduction Introduction Straight line Approximation of Curve Models Available FeaturesTX91 Models Available Model Number Description Unpacking Mounting the TX91 InstallationAssembly of the TX91 Transmitter Inside RT Mounting Track in inches TX90-BR Mounting Bracket in inches Mounting Track RT Bracket TX90-BR Wiring the TX91 Refer to Figure Wiring Diagram for the TX91 Potentiometers Equipment Required Calibration InstructionsSet-up of Equipment Calibration Procedures Refer to Figure Calibration Instructions Calibration Set-Up Calibration Set-Up. Alternate Calibration Values for the TX92 Current rating on the power supply Troubleshooting GuideTroubleshooting Guide Model No Description AccessoriesGeneral SpecificationsInput Intrinsically Safe Interconnection Diagram WARRANTY/DISCLAIMER Shop online at omega.com