| 摘要 |
PURPOSE:To prevent the faults caused by forgetfulness in resetting, by automatically restoring a warning buzzer circuit beta, which is manually turned OFF, thereby automatically resetting the warning buzzer circuit under specified conditions, with a warning stopping switch being operated. CONSTITUTION:When a warning stopping switch Er is depressed, a warning stopping relay E is turned ON, a contact point (e) is changed, and the warning is stopped. A water leakage signal t1 from a timer circuit T1 and the signal from the contact point (e) are inputted to an amplifier A2. The amplifier A2 outputs a positive level signal based on the two signals, and operates the warning stopping realy E. A warning relay B is tunred OFF, and a buzzer A is stopped. When the flooded water is processed and an output a1 becomes a ''0'' level, an output t2 of a second timer circuit T2 is immediately returned to a ''0'' level. After 34sec, the outut of the timer circuit T1 becomes a ''0''. Accordingly, the output from the amplifier A2 becomes a ''0'' level. The warning stopping relay E is turned OFF, its contact point (e) is restored, and the circuit of the warning relay B is prepared. |
