天气预报15天查询> 其他> 指针式万用表怎样测电流

指针式万用表怎样测电流

更新时间: 2020-10-05 00:00:00     

指针式万用表测电流方法:

1、连接电路,使发光二极管正常发光。

2、准备万用表并将选择开关置于mA档100mA量程。

3、断开电位器中间接点和发光二极管负极间引线,形成“断点”,发光二极管熄灭。

4、将万用表串接在断点处。红表笔接发光二极管负极,黑表笔接电位器中间接点引线。发光二极管重新发光,万用表指针所指刻度值即为通过发光二极管的电流值。

关键词: 指针 怎样 电流

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-3244679/ | 耗时:0.9697 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=3244679 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3244679 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3244679 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2547840,1126778,1130720,331775,1074630,3157599,1112154,2268424,1109921,3126693,1982221,1127479,107270,2826613,997166,1111326,1995158,1071954,156579,1104617,260267,1531806,3199611,1117988,1508448,1371505,2674220,1464931,1052675,2032102) ORDER BY field (ArticleID,2547840,1126778,1130720,331775,1074630,3157599,1112154,2268424,1109921,3126693,1982221,1127479,107270,2826613,997166,1111326,1995158,1071954,156579,1104617,260267,1531806,3199611,1117988,1508448,1371505,2674220,1464931,1052675,2032102)