| 摘要 |
PURPOSE:To equalize the characteristics in the case the aging is performed in the gaseous atmosphere whose generating rate is high in the gas generated in the equipment itself in which gas sensors are mounted, by setting the concentration of said gaseous atmosphere at the concentration at the warming up of a cooking machine. CONSTITUTION:After the gas sensors GS are set on a top plate 25 of a doping tank 22, aging time is set by a timer. Then, a motor 19 and a heater 17 are started, and dimethyl siloxane gas is generated from a silicon compound 16. Said gas is completely filled in the doping tank by an agitating fan 18. In the meanwhile the inside of the doping tank 22 is heated to 150-250 deg.C by the heater 17. By setting the concentration of said generated gas at the vicinity of 3.0%, the sensitivity of the gas sensors become the optimum, which corresponds to the concentration of the gas which is generated at the time of warming up of the cooking machine without loads. |
