| 摘要 |
PURPOSE:To facilitate resetting of emergency lights which are difficult to access or resettng of all emergency lights by making resetting of a device that makes and holds display responding to voltage drop by a relay. CONSTITUTION:When a reset switch S3 is turned on while a light emission diode LED is lighting, a relay contact S2 is changed from NC to NO by a realy coil RY. In this short time of changing, the LED turns off. When the voltage of a battery BT is above a standard voltage, the LED keeps off and if it is above the standard voltage, the light turns on again when the relay terminal is changed to the NO terminal. The same thing takes place when the reset switch is turned off again. Since the battery checker is reset by operating the reset switch S3, remote control is made possible, and plural battery checkers can be reset simultaneously. |
