| 摘要 |
<p>A device for easily calculating a value remaining in an electrical apparatus and decreasing with use includes a sensor for detecting a state of use of the electrical apparatus, and issuing an electrical signal corresponding to the detected state, a determining portion (20) for determining a history of use of the electrical apparatus based on the electrical signal sent from the sensor, a communication portion (26) for receiving a standard residual value of a member of the electrical apparatus, a storing portion (24) connected to the communication portion (26) for storing the received residual value, a calculating portion (22) connected to the history determining portion (20) and the storing portion (24) for calculating the value remaining in the electrical apparatus based on the detected history and the stored residual value, and a monitor (30) connected to the calculating portion (22) for displaying the residual value calculated by the calculating portion (22). <IMAGE></p> |
