Apparatus and method for detection of an open thermocouple in a

Details Apparatus and method for detection of an open thermocouple in a Apparatus and method for detection of an open thermocouple in a

1988-02-08

1989-06-20

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

324537, G08B 2100

Patent

active

048412864

ABSTRACT:
In a process control network, apparatus and method for periodic testing of a thermocouple element includes a switching mechanism that inserts a circuit with known parameters in series with the thermocouple. Voltages levels with and without the inserted circuit are compared and used to identify a failed or failing thermocouple.

REFERENCES:
patent: 3468164 (1969-09-01), Sutherland
patent: 3590370 (1971-06-01), Fleischer
patent: 3973184 (1976-08-01), Raber
patent: 4571689 (1986-02-01), Hildebrand et al.

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