Thermocouple reference junction calibrator

Details Thermocouple reference junction calibrator Thermocouple reference junction calibrator

1978-07-07

1979-04-03

Swisher, S. Clement

Measuring and testing

Gas analysis

Moisture content or vapor pressure

73361, G01K 712

Patent

active

041470613

ABSTRACT:
Apparatus is disclosed which provides an improved means of measuring the operating characteristics of a multiplicity of thermocouple reference junctions. The apparatus allows accurate sensing of temperature through use of both a measurement and reference junction thermocouple arrangement. The reference junction thermocouples are collectively encased and surrounded by an insulating medium which on one side abuts a metal plate serving as a heat sink of appreciable mass. The operating temperature of the heat sink is then monitored by a temperature sensitive resistor. Voltage drop across the resistor is convertible into a measure of system calibration.

REFERENCES:
patent: 3069909 (1962-12-01), Hines
patent: 3192770 (1965-07-01), Bash
patent: 3648523 (1972-03-01), Kemper

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