Electronic multifunctional energy meter has the ability of software calibration. This paper introduces a calibration system built by using PTC-8125 energy meter inspection device and developed by VC6.0. The overall structure of the system and the design ideas and implementation methods of the software are given, and the function of automatic calibration of the multifunctional energy meter is completed. Keywords: multifunctional energy meter; calibration system; automatic calibration Electronic energy meter is gradually replacing traditional mechanical energy meter due to its high accuracy, small starting current, good error linearity, powerful and easy expansion, strong anti-theft ability, and remote monitoring. Modern electronic multifunctional energy meter is one of the important features of automatic calibration (Auto-Cal, also known as digital calibration or software calibration). It can transmit relevant commands through the interface and use software to complete the multi-parameter calibration of the energy meter in just a few seconds. There is no need to use electric soldering irons and screwdrivers during calibration, which avoids the damage of these tools to the instrument. Software calibration has high adjustment fineness and good production repeatability, which is conducive to production automation, reduces the impact of a large number of human factors on product quality, and ensures the stability and reliability of products and quality. At the same time, due to the simple operation, no high-level technicians are needed, so the qualified rate of electric energy meter production can be improved, which has important practical significance and urgency for quality control. This system is a software automatic meter calibration system developed for electronic multifunctional electric energy meters.
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