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Electric energy meter small signal offset correcting method

A calibration method and electric energy meter technology, applied in the field of electric energy meters, can solve the problems of low precision, small calculation amount of electric energy meter detection table body, reduced electric energy meter production efficiency, etc., so as to improve production efficiency, shorten time and speed up calibration speed. Effect

Active Publication Date: 2014-08-13
NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The correction method of the above-mentioned electric energy meter small-signal bias has the following disadvantages: the first four steps have relatively low accuracy requirements, so that the calculation amount of the electric energy meter detection platform is small, so the correction speed is fast, and with the 5% Ib point resistance The precision of resistivity 1.0 is higher, so the operation of this step is more than 100 seconds. This is only the calibration of one channel. If it is necessary to correct the precision of the second channel or the precision of 2% Ib point resistivity 1.0, it will cost more twice as long or more
Such a long calibration time greatly affects the calibration speed of the small signal bias of the energy meter, and also reduces the production efficiency of the energy meter

Method used

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with specific examples.

[0017] A method for correcting the small signal bias of an electric energy meter of the present invention comprises the following steps:

[0018] (1), 100% Ib point resistivity 1.0 accuracy test: read out the error value on the detection platform of the electric energy meter that needs to be corrected, and this value is obtained after the calculation of the electric energy meter detection platform. Write into the metering chip registers GP1, GQ1, and GS1 of the energy meter to be calibrated;

[0019] (2) Accuracy test under 100% Ib point resistivity 1.0: Read back the error value on the detection platform of the electric energy meter again to judge whether it is within the specified range? If the value is within the specified range, it is judged that the resistance 1.0 precision calibration is completed, and step (3) is performed at the same time; otherwise, return to step (1...

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Abstract

The invention discloses an electric energy meter small signal offset correcting method. According to the method, testing is carried out under 100% Ib point resistance 1.0, under 100% Ib point inductance 0.5L and under 5% Ib point resistance 1.0. The correcting method is high in correcting speed.

Description

technical field [0001] The invention relates to the technical field of electric energy meters, in particular to a correction method for small signal bias of electric energy meters. Background technique [0002] The calibration method of prior art electric energy meter small signal bias is as follows: (1), 100% Ib point resistance 1.0 lower accuracy test: read the error value on the electric energy meter detection platform body, this value is calculated through electric energy meter detection platform body Finally obtain the gain value, write the gain value into metering chip registers GP1, GQ1, and GS1 by the computer; (2), 100% Ib point resistance 1.0 accuracy test: read back the error on the electric energy meter detection platform body again Value, judge whether it is within the specified range? If the value is within the specified range, it is judged that the resistance 1.0 precision correction is completed, and step (3) is performed simultaneously; otherwise, return to...

Claims

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Application Information

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IPC IPC(8): G01R35/04
Inventor 郑坚江季上满
Owner NINGBO SANXING MEDICAL & ELECTRIC CO LTD