Method of COHb calculation in a carbon monoxide detector

Details Method of COHb calculation in a carbon monoxide detector Method of COHb calculation in a carbon monoxide detector

2006-02-24

2008-08-05

Hofsass, Jeff (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S603000, C073S023200, C073S031010

Reexamination Certificate

active

07408473

ABSTRACT:
A gas detector and method of operating the gas detector that includes a carbon monoxide sensor and a processor. The carbon monoxide sensor senses an environmental concentration of carbon monoxide and provides the sensed value to the processor. Upon receiving the value of the carbon monoxide level (COppm), the processor determines an alarm threshold level based upon the COppm level. Once the alarm threshold level is determined, the processor calculates the COHb percentage for the current COppm reading based upon a derived, fixed point equation. The processor activates an audible/visual indicator when the sensed COHb percentage exceeds the alarm threshold.

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