Gas concentration measuring apparatus minimizing measurement...

Details Gas concentration measuring apparatus minimizing measurement... Gas concentration measuring apparatus minimizing measurement...

2005-05-24

2005-05-24

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Gas analysis

Gas of combustion

C073S023320, C073S031050, C204S425000, C204S426000, C204S427000

Reexamination Certificate

active

06895800

ABSTRACT:
A gas concentration measuring apparatus has a gas sensor including pump, sensor, and monitor cells. The apparatus works to look up a predetermined voltage-to-current relation to determine an initial value to be applied to the pump cell as a function of a current output of the pump cell, apply the initial value of the voltage to the pump cell, and to sweep it temporarily. The apparatus works to correct the initial value of the voltage as a function of a current output of the sensor cell upon the sweep of the initial value of the voltage applied to the pump cell, thereby better maintaining gas concentration measuring accuracy with respect to, for example, aging of the sensor.

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patent: 6295862 (2001-10-01), Kurokawa et al.
patent: 6656337 (2003-12-01), Kurokawa et al.
patent: 0798555 (1997-10-01), None
patent: 9-318596 (1997-12-01), None
patent: 2885336 (1999-02-01), None
patent: 2000-137018 (2000-05-01), None

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