Hydrocarbon sensor diagnostic method
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United States of America Patent
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-
Mar 30, 2004
Grant Date -
N/A
app pub date -
Nov 17, 1999
filing date -
Nov 17, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A vapor recovery system in a fuel dispenser includes the ability to self diagnose the continued viability of a hydrocarbon sensor positioned within the vapor recovery system. A control system associated with the vapor recovery system performs a series of tests including passing pure air over the hydrocarbon sensor and passing a gas known to have hydrocarbons therein over the sensor and evaluating the output of the sensor to see if expected values are output. If the measured values are not within tolerable limits, an alarm is generated.
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