Electrical energy meter having record of meter calibration data

Details Electrical energy meter having record of meter calibration data Electrical energy meter having record of meter calibration data

1994-07-12

1996-02-27

Karlsen, Ernest F.

Electricity: measuring and testing

Testing and calibrating electric meters

36457102, G01R 3504

Patent

active

054951674

ABSTRACT:
An electrical energy metering system includes a solid-state electrical energy meter with non-volatile factory calibration memory and non-volatile field calibration memory therein. The system also includes a programming unit, such as a hand-held computer, for programming the factory calibration memory with factory calibration parameters and for programming the field calibration memory with field calibration parameters obtained from field testing of the meter. The calibration parameters includes parameters relating to meter measurement accuracy such as full-load, light-load and lag calibration parameters. These parameters can be generated during periodic field tests and stored in the meter for retrieval at a later date, such as during a subsequent test of the meter. Because the meter is capable of retaining a plurality of calibration parameters from each field test, a chronological history of data relevant to meter accuracy can be stored in the meter and a paperless transfer of this data to a utility database can be achieved.

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