Omega TX91 manual Calibration Instructions

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4Calibration Instructions

If a Thermocouple Calibrator/Simulator is used, such as the OMEGA Model CL511 Precision Calibrator, select the Temperature Input Z (zero) and S (span) values.

3.Set the DC mV source to the selected Z (zero) mV value. Adjust the Z potentiometer to read 4.000 mA on the monitoring instrument.

4.Set the DC mV source to the selected S (span) mV value. Adjust the S potentiometer to read 20.000 mA on the monitoring instrument.

5.Repeat steps 3 and 4, as required, until the readings are exactly

4.000 mA and 20.000 mA. This procedure is necessary since there is interaction between the two potentiometers.

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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