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电压表保养方法
更新时间: 2021-05-14 03:12:32  

1、测量时应将电压表并联接入被测电路。

2、由于电压表与负载是并联的,要求内阻Rv远大于负载电阻RL。

3、测量直流时,先把电压表的“—”瑞钮接入被测电路的低电位端,然后再把“+”端钮接入被测电路的高电位端。

4、对多量限电压表,当需要变换量限时,应将电压表与被测电路断开后,再改变量限。

关键词: 电压 保养 方法

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