| 摘要 |
PROBLEM TO BE SOLVED: To provide a power monitoring system in which convenience is improved by reducing the trouble of the resident to manually set the date and time in each emergency situation without increasing the required cost.SOLUTION: When it is determined that a timing part 14 is not normally operated to count the time in a control unit 10, an intercom master unit 1 transmits a time information request signal requiring time information on the date and time in the timing part 22 to a power measurement device 2, the power measurement device 2 returns a response signal including the time information in the timing part 22 to the intercom master unit 1 upon receipt of the time information request signal, and the intercom master unit 1 corrects the date and time in the timing part 14 based on the time information included in the response signal upon the receipt of the response signal. |
