Self-testing gas detector
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United States of America Patent
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Issued Date -
May 12, 2005
app pub date -
Aug 13, 2004
filing date -
Nov 10, 2003
priority date (Note) -
Abandoned
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Abstract
A method of calibrating a combined carbon monoxide and carbon dioxide detector, and a combined carbon monoxide and carbon dioxide detector comprising a carbon monoxide sensor, a carbon dioxide sensor, and a carbon monoxide and carbon dioxide gas generator are disclosed. The method of self-testing the carbon monoxide and carbon dioxide detector comprises the steps of controlling the carbon monoxide and carbon dioxide gas generator to generate a known quantity of carbon monoxide and carbon dioxide; monitoring the response of the carbon monoxide sensor to the known quantity of carbon monoxide; monitoring the response of the carbon dioxide sensor to the known quantity of carbon dioxide; and correcting the calibration of the carbon monoxide sensor and/or the carbon dioxide sensor when the response is outside of a predetermined range.
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