| 摘要 |
An improved process (10) ensures to the extent possible that the usage memor y (100, 102) of an electronically-based electricity meter (92) is always in a state that most recent data may be retrieved. Two separate areas or pages (8 8, 90) of memories (100, 102) are maintained and updated as to quantitative consumption, i.e. kilowatt-hour. The older of the two data memories (100, 10 2) is updated, based on a data validation check. The approach ensures that a previous value is always retained, to prevent full data loss in the event th at the power goes down. If one area (88, 90) of memory (100, 102) becomes corrupted, the other value can be retrieved and verified so as to prevent lo ss of both memory areas (88, 90), before a subsequent data reading (such as kWh or an unit of time for a kW reading). Use of a relatively small unit of measure prevents significant adverse data loss, since any data lost is limit ed to the chosen unit of measure since the most recent update.
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