Environmentally Conscious and Economically Sound Machine Dismantling Forum > Madison, WI
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> Honeywell trendview cold junction resistor 50003794-501
Honeywell trendview cold junction resistor 50003794-501
2pc in this package. This can be used for the QX, SX, & QXE trendviews.
A cold junction compensation bridge for a thermocouple circuit includes a temperature compensation resistor encased in a heat conductive material and is directly connected to the same terminal block or strip to which the thermocouple leads are attached. The compensation resistor is in the same chamber of a housing as the cold junction of the thermocouple so it is subjected to the same temperature as the thermocouple junction. This is of particular importance in two wire current transmitters wherein the housings are multi compartment, with the electronics in one compartment (that may be sealed and not normally opened) and the terminal blocks for connecting the thermocouple and the like, as well as the calibrating screws, in a separate compartment. In such arrangements the thermocouple cold junction can be at a different temperature than the rest of the electronics. In the present invention, the cold junction compensation resistor is in the same location as the junctions of the thermocouple to insure that any changes in temperature of the cold junction are sensed by the resistor.
