Automatic thermocouple reference junction compensator

Details Automatic thermocouple reference junction compensator Automatic thermocouple reference junction compensator

1980-06-09

1981-09-08

Swisher, S. Clement

Measuring and testing

Gas analysis

Moisture content or vapor pressure

G01K 712

Patent

active

RE0307351

ABSTRACT:
A system for automatic cold-junction referencing of thermocouples in temperature controllers wherein a differential amplifier is used to amplify the thermocouple signal prior to establishing the cold-junction compensation and measuring range. This permits the use of command signals from any floating or single-ended source, making the controller compatible with existing traditional command generators and with computer systems with digital-to-analog converters. The amplifier isolates the thermocouple from the remainder of the circuitry such that it can be grounded on the heated part.

REFERENCES:
patent: 3921453 (1975-11-01), Platzer
patent: 4120201 (1978-10-01), Wargo

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