Surveying the internal resistance of a sensitive electriccurrentmeter is a rather difficult and complicated electromagnetic experiment which is hard to get a high precision.
灵敏检流计内阻测量实验是电磁学实验中一个比较复杂有相当难度的实验，难就难在如何提高测量精度。
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Demonstrating ElectricMeter, Model J0403 has 14 ranges. It can serve as current detector in the experiment demonstration, measurement of micro current. DC voltage and DC resistance.
This paper makes a research on the anti current shunt electric larceny technology for electronic electric energy meter of high-voltage power metering system.