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万用表由哪些构成
更新时间: 2020-10-10 00:00:00  

1、表头 :通常采用磁电系测量机构作为万用表表头.它的满刻度偏转一般为几个微安到数百微安.满刻度偏转电流越小,则灵墩度越高;

2、表笔和表笔插孔:表笔分为红、黑二只。使用时应将红色表笔插入标有"+"号的插孔,黑色表笔插入标有"-"号的插孔;

3、测量线路: 一般万用表的测量线路由多量程直流电流表、多量程直流电压表、多橄程交流电压表及多盈程欧姆表组成.某些型号的万用表还有多蚤程交流电流测量线路;

4、转换开关 :万用表各种测量对象及量程选择是靠转换开关来实现的.转换开关里有固定接触点和活动接触点,当活动接触点和固定接触点闭合时可以接通电路。

关键词: 哪些 构成

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