Electrochemical carbon monoxide sensor supervision

Details Electrochemical carbon monoxide sensor supervision Electrochemical carbon monoxide sensor supervision

2008-10-27

2011-11-29

Bell, Bruce (Department: 1759)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C204S424000, C205S782000, C205S784000, C205S784500, C205S785500, C340S632000, C340S693600

Reexamination Certificate

active

08066859

ABSTRACT:
A sensor supervision system for periodically providing a test to accesses the status of a gas detection sensor, such as a carbon monoxide (CO) sensor, is provided. To access the status of the CO sensor, a processor provides a voltage to the sensor supervision system, such that a voltage is applied to CO sensor, charging the CO sensor. The status of the CO sensor is accessed by determining the change in the voltage charge of the CO sensor between two sampling time points. If the first sample voltage is substantially equal to the second sample voltage, i.e., a substantially constant voltage, the carbon monoxide sensor fails the test. However, if there is an change is the voltage change between the first and second sampled time points, the CO sensor passes the test.

REFERENCES:
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