交流电流探头是利用电流变压器的原理来测试电流的﹐它的中心部分可以打开和卡紧在有电流流过的导线上。

Ac current probe act as a current transformer which the core can be opened and clamped on a current carrying conductor.

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当电压表测量探头2和探头3之间的电压降时，该交流电流在r3上产生的电压降就会引起错误的结果。

The resulting voltage drop across r3 will cause erroneous results when the voltmeter measures the voltage drop between probes 2 and 3.

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