METHODS AND APPARATUS TO DETECT LEAKAGE CURRENT IN A RESISTANCE TEMPERATURE DETECTOR

METHODS AND APPARATUS TO DETECT LEAKAGE CURRENT IN A RESISTANCE TEMPERATURE DETECTOR

Methods and apparatus to detect leakage current in a resistance temperature detector are disclosed. An example method includes providing a resistance temperature detector circuit with a first resistance circuit and a second resistance circuit, measuring a first voltage at the first resistance circui...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MCGAUGHEY, JEFFREY, B, MAYER, PAUL, G, LIU, XUEDONG
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
MEASURING QUANTITY OF HEAT
MEASURING TEMPERATURE
PHYSICS
TESTING
THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:Methods and apparatus to detect leakage current in a resistance temperature detector are disclosed. An example method includes providing a resistance temperature detector circuit with a first resistance circuit and a second resistance circuit, measuring a first voltage at the first resistance circuit in response to applying a first current to the first resistance circuit, measuring a second voltage at the second resistance in response to applying a second current to the second resistance circuit, comparing the first and second voltages to determine a difference value, and determining that a current leak exists in the resistance temperature detector circuit when the difference value is not within a first range.