Apparatus and method for detection of an open thermocouple in a process control network
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United States of America Patent
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Jun 20, 1989
Grant Date -
N/A
app pub date -
Feb 8, 1988
filing date -
Feb 8, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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