| 摘要 |
PURPOSE:To monitor the battery of a transmitter side on a receiver side and make possible to prevent the over discharge of the battery by emitting an alarm signal and cutting off the power source after a certain time when the power source voltage drops on the transmitter, side, and maintaining the detection of alarm receiving on the receiver side. CONSTITUTION:On the transmitter side T of a wireless type weighing apparatus driven by a battery, a detection circuit 6 operates and an alarm signal is emitted when the voltage of a battery power source 1 drops below E, and further by the action of a delay circuit 10, a switch 5 operates after a certain time and the power source is cut off. On the receiver side R, the arrival of the alarm signal is detected and displayed by, for example, turning a lamp 15 on, and even after the signal is stopped, the state of lighting is maintained. By so doing, the state of the battery of the transmitter side T is monitored on the receiver side R and the reading of poor data due to the drop of the power source voltage can be avoided and the over discharge of the battery can be prevented. |
