THERMOCOUPLE OPEN-CIRCUIT DETECTION CIRCUIT AND METHOD
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United States of America Patent
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Issued Date -
Aug 28, 2014
app pub date -
Jan 30, 2014
filing date -
Feb 26, 2013
priority date (Note) -
Abandoned
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Abstract
A method for detecting an open-circuit in an external thermocouple network includes these steps: (a) injecting a current pulse of a predetermined duration into the external thermocouple network; and (b) measuring the voltage across the pair of terminals after a time period following the predetermined duration. In one example, the time period is sufficiently long to allow the current pulse to dissipate from the external thermocouple circuit when a thermocouple in the external thermocouple network does not have an open circuit. The thermocouple network may include a resistor-capacitor network provided between the thermocouple and one of the terminals.
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