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85问答库 > 数字万用表测量电位时，黑表笔为什么要GND？

数字万用表测量电位时，黑表笔为什么要GND？

2025-03-16 17:57:23

推荐回答（2个）

回答1：

GND是"地"的意思，也就是参考点，通常我们假设参考点的电位为0。数字万用表和指针式万用表最大的区别是可以测量负的电量，把黑表笔解GND，那数字万用表显示的电位就是以GND为参考点的电位。

回答2：

黑表笔是万用表内部电路的公共接地端!
GND在电路里是代表公共接地端!
多数电路的电位公共参考点也是公共接地端!

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