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万用表怎样测零火
更新时间: 2020-10-10 00:00:00  

首先为万用表安装好电池、插好表笔线。然后把万用表档位旋钮拨动到交流750V档,接着把黑表笔悬空,用红表笔分别接触两个待测点。读数较大的一端即为火线,而读数较小的则为零线。通过试电笔能够检测结果是否正确,用试电笔分别接触两个待测点,氖管亮的一端为火线,不亮的一端则为零线。

关键词: 怎样

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