Omega manual Installation, Wiring the TX91 Refer to Figure

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3Installation

3.2Wiring the TX91 (Refer to Figure 3-5)

1.Connect a DC power supply in series with the load to the (+PS) and (-PS) power terminals. Note that the load (usually a monitoring instrument) may be connected to either the (+) or (-) power lead.

2.Connect the thermocouple to the (+IN) and (-IN) input terminals.

NOTE

A milliamp monitoring instrument can be used in the circuit by connecting the monitor’s positive lead to (+PS) and the negative lead to

15(M). This allows monitoring the current loop without disconnecting the main wiring.

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Contents User’sGuide Servicing North America Return Requests / Inquiries Introduction Calibration Instructions Introduction General DescriptionIntroduction TX91 Thermocouple Transmitter Introduction Introduction Straight line Approximation of Curve Features Models AvailableTX91 Models Available Model Number Description Unpacking Installation Mounting the TX91Assembly 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 Calibration Instructions Equipment RequiredSet-up of Equipment Calibration Procedures Refer to Figure Calibration Instructions Calibration Set-Up Calibration Set-Up. Alternate Calibration Values for the TX92 Troubleshooting Guide Current rating on the power supplyTroubleshooting Guide Accessories Model No DescriptionSpecifications GeneralInput Intrinsically Safe Interconnection Diagram WARRANTY/DISCLAIMER Shop online at omega.com