| 摘要 |
<p>The invention provides a solid-state eventlogging system to record the occurrence of specified events in a removable, solid-state, memory cartridge (49). Counters (17); (55, 56, 57) continously count pulses produced by a plurality of electrical energy measuring device (A, B, C, D). Sample values of the continuous counts are produced and input to a microprocessor (23) wherein each sample value has the previous sample value subtracted therefrom. The difference is added to an interval sum stored in a random access memory (27). The interval sums, together with real time information produced by a clock (47), are input to the memory cartridge according to a predetermined format. The clock is maintained in synchronization with the frequency of the line voltage by the microprocessor.</p> |
