| 摘要 |
PURPOSE:To set automatically a heating period, etc. using a sensor so as to secure the most favorable finished state suitable for the particular food, by setting and controlling a cleaning period according to the state of a heating chamber, and correcting sensor levels of a gas sensor, etc. to bring to the original values of the prescribed levels. CONSTITUTION:If a gas level has changed in a judging step (A), the degree of that change is checked in a judging step (F), and if the difference of the change is very great, a judging step (G) is carried out. If the difference of the change is about in the range within a prescribed level, the gas level is renewed to continue the measurement of the gas again. If the gas level is continuously stable but it is not observed that there is a change after the measurement of an original value phi in a judging step (C), a judging step (D) is carried out, then it is compared with an upper limit value V2 calculated from a peripheral circuit constant at the normal state of the sensor, then if it exceeds the upper limit value, it is judged that there is abnormality about the sensor or the peripheral circuit, and said sensor abnormality informing lamp 9 is lit and at the same time the heating operation is stopped. |
