Omega manual TX91 Thermocouple Transmitter

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1Introduction

The TX91 transmitter is normally powered by an unregulated DC power supply as shown in Figure 1-3. The proportionally-transmit- ted signal begins at 4 mA, at the low end of its temperature range, and increases to 20 mA, at the high end of its temperature range. (There are various temperature ranges and thermocouple types available for the TX91. To order, refer to Section 1.3 for correct Model Numbers and Range Codes.)

THERMOCOUPLE	COPPER
	WIRES
	DC SUPPLY
TX91	11-44 VDC
THERMOCOUPLE
TRANSMITTER
Input

3

Figure 1-3. TX91 Thermocouple Transmitter

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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