Electricity meter and method of calibrating same
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United States of America Patent
Stats
-
Jun 6, 1989
Grant Date -
N/A
app pub date -
Apr 29, 1986
filing date -
May 2, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An solid-state electricity meter includes an electronic measuring unit with an analog/digital converter which receives signals from amplifiers for various measurement ranges, and a control section with a microcomputer wherein the meter signal is processed, taking into account correction factors for the various elements of the circuit. Each correction factor is a single value for each respective measurement range, and the correction factors for each range are contained in corresponding meter-characteristic quantities which are stored in the electricity meter. Each meter-characteristic quantity represents a measurement value corresponding to a specific quantity of energy. Only a few (e.g., only 4) meter-characteristic quantities need be stored in the electricity meter. These meter-characteristic quantitites can be determined in a conventional calibration procedure, and they enable all the fixed errors of the signal processing to be compensated.
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