| 摘要 |
PURPOSE:To provide a gas shut-off device which automatically corrects a proper using condition and is safe, by providing a using state memory computing part, a proper using condition setting varying part, a time-up counting part to count a time-up output from a timer, a temporary proper using condition computing part, a using state memory computing part, and a temporary memory part. CONSTITUTION:A title device is provided with a proper using condition setting varying part 11 to compare an output from a using state memory computing part 7 with an initial condition and set and vary a given value as a new proper using condition, a time-up counting part 14 to count a time-up output from a timer, and a using state memory computing part 16 in an occurrence rate observation area to store a gas using state entering an occurrence observation area at each timer actuating period and compute a using condition. The proper using condition setting varying part 11 stores a present proper using condition in a proper using condition temporary memory part 17 at a point of time when a temporary set signal from a temporary proper using condition computing part 15 is inputted and sets and varies a proper using condition according to a signal from the using state memory computing part 16 in an occurrence rate observation area or a signal from the temporary memory part 17. |
