Electric energy meter daily timing error calibration method

Abstract

The invention discloses an electric energy meter daily timing error calibration method and relates to an electric energy meter calibration method. The method comprises the following steps: powering ona calibration platform by a computer; starting daily timing error reading by the computer, and waiting for a calibrated electric meter to output an error value; reading errors of a calibrated electric meter from the calibration platform by the computer through a serial port; calculating a compensation value by the computer through an algorithm, wherein the compensation value is equal to a hex number of 2 bytes converted from a result of the error multiplied by 10 / 0.0864; writing a gain register result obtained through calculation into the calibrated electric meter by the computer through an RS485 bus; detecting whether a daily timing value meets standards or not by the computer; if the standards are not met, repeating the former steps. Due to the adoption of the method disclosed by the invention, computer operation is carried out, a capacitor does not need to be replaced, and the working efficiency can be improved; due to production testing, the calibration time of a single meter is shortened by 50% or greater; the operation time can be remarkably shortened, the universality is high, and daily timing errors of electric meters can be rapidly calibrated.

Description

technical field [0001] The invention relates to a calibration method for an electric energy meter, in particular to a method for calibrating the daily timing error of the electric energy meter. Background technique [0002] The daily timing error of the watt-hour meter is the difference between the clock of the watt-hour meter and the standard time after the clock runs for one day. The difference between the internal clock of the electric energy meter with a large daily timing error value and the standard time will become larger and larger. After the large gap between the electric energy meter clock and the standard time, it will affect the accuracy of the electric energy meter measurement data. , It is necessary to detect the daily timing error of the electric energy meter. The State Grid and China Southern Power Grid have very strict requirements on the daily timing error of the electric energy meter. Only electric energy meters with an error value of plus or minus 0.06 se...

AI Technical Summary

Problems solved by technology

This method has several defects; 1. By increasing or decreasing the crystal matching capacitor, when the error is large, the capacitor needs to be replaced

2. Only one energy meter can be operated at a time, and the efficiency is low

3. In the production process of electric energy meters, a process needs to be added, which increases labor costs

[0038] The above is the traditional calibration method of the daily timing error, which is cumbersome and needs to replace the capacitor; in view of this, it is necessary to improve the existing calibration method of the daily timing error of the electric energy meter to solve the above problems

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