天气预报15天查询> 生活> 电压表保养方法

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

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-3295176/ | 耗时:0.7136 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=3295176 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3295176 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3295176 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(100086,369769,826129,1130854,358841,616153,3442265,87677,890531,1097441,101209,1066890,363453,2513408,369139,1129451,359244,707684,105693,369081,3069642,362349,90496,1139268,362731,706801,367583,1110145,919911,1479863) ORDER BY field (ArticleID,100086,369769,826129,1130854,358841,616153,3442265,87677,890531,1097441,101209,1066890,363453,2513408,369139,1129451,359244,707684,105693,369081,3069642,362349,90496,1139268,362731,706801,367583,1110145,919911,1479863)