| 摘要 |
PROBLEM TO BE SOLVED: To correct easily a temperature-dependent change of zero point with time. SOLUTION: In the zero point correction method of gas sensor using a contact combustion type gas detection element including a gas detection means 10 detecting and outputting a difference output between a contact combustion type gas detection element 11 and a compensation element 12 compensating the temperature characteristics of the sensor, a temperature detection means 70 detecting an environmental temperature, a zero point calibration means 20 calibrating the zero point of the gas detection means, a zero point adjustment means 30 adjusting a temperature change of output after the zero point calibration, a concentration computing means 50, and a concentration display means 60, an adjustment coefficient is previously calculated from the relation between the temperature change of the contact combustion type gas detection element 11 and the amount of zero point change and is stored in a temperature adjustment coefficient computing means 40, and the adjustment is carried out based on the adjustment coefficient by the zero point adjustment means 30. COPYRIGHT: (C)2010,JPO&INPIT
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