Electric energy meter calibrating method

Abstract

The invention discloses an electric energy meter calibrating method. The method comprises the steps that first, the source value of the electrical parameter of an electric energy meter calibration table body is acquired; meter calibrating coefficients are reset for a calibrated meter; then, the table body is manually switched to the next meter calibrating point; the stability of the table body is judged according to the current measured value of the calibrated meter and the source value of the table body, and if the table body is unstable, it needs to wait until the table body is stable; afterwards, the current state of the table body is judged, and the meter calibrating points are automatically selected for the calibrated meter; then, the precision of the calibrated meter is obtained according to the current measured value, the filtering value and the source value of the table body of the calibrated meter; afterwards, the meter calibrating coefficients of the calibrated meter are obtained respectively according to a set formula; at last, the meter calibrating coefficients are set and stored. According to the electric energy meter calibrating method, a 485 bus channel is needless, the support of related upper computer software and equipment is of no need, the state of the table body and the state of the electric energy meter of the electric energy meter calibration table body can be intelligently distinguished, and the whole meter calibrating process only needs dozens of seconds at the soonest.

Description

technical field [0001] The invention relates to a meter calibration method of an electric energy meter. Background technique [0002] At present, in the field of meter calibration of electric energy meters, the method of sending meter calibration commands through the special upper computer software through the 485 bus is mostly adopted in China. This method has several defects: 1, one round of table calibration needs half an hour to several hours to complete, and the time is long. 2. There must be 485 bus and special software and equipment support. 3. The upper computer meter calibration software takes up a lot of resources, and the algorithm and process are complicated, so it is not easy to transplant to the electric energy meter using the single-chip microcomputer system. These defects cause an increase in manufacturing cost. Contents of the invention [0003] The purpose of the present invention is to provide a meter calibration method that can significantly reduce t...

AI Technical Summary

Problems solved by technology

This method has several defects: 1. It takes half an hour to several hours to complete a round of meter calibration, which takes a long time.

2. There must be 485 bus and special software and equipment support

3. The upper computer meter calibration software takes up a lot of resources, and the algorithm and process are complicated, so it is not easy to transplant to the electric energy meter using the single-chip microcomputer system

These defects have caused an increase in production costs

Images