| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electronic watt-hour meter in which power consumption data are not separated depending on a date even in a measurement time zone in which the date change. <P>SOLUTION: The electronic watt-hour meter comprises a calculating part 9 for calculating a power amount based on current information and voltage information, a display part 7 for displaying obtained power amount data, a storage part 6 for storing the power amount data, and an operation part 8 for setting a time zone for calculating power consumption. The calculating part 9 does not control a date change until the time zone is ended when the set measurement time zone of the power consumption crosses 0:00 am, and controls to store in the storage part 6 as the power consumption data on the date when calculation is started. <P>COPYRIGHT: (C)2009,JPO&INPIT |
