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铝电解电容耐压测试使用方法
Edit:管理员 Browse: Times Date:2016-10-15
电解电容器耐压测试使用方法
前面的文章中有
贴片电解电容
的耐压测试这篇文章,里面有为大家讲解到
铝电解电容的耐压测试方法
,如何测试
铝电解电容
的耐压测试的设计等,今天我们来说说一下铝
电解电容
测试电路的使用方法:
1.将测试电压调到比
电解电容
额定电压高一些的档位。如测试35V的
电容
、可将档位放到64V。测试50V的电容,可将档位放到64V或96V。档位高一些对测试结果影响不大,只是档位越高,三极管Q1的功耗相应会大一些。
2.选择合适的测试电流。测试电流应根据
电容
容量来选择,容量越大测试电流也越大。对于4700uf以上的
电容
,可选择大于10mA的测试电流;对于1000-4700uf的
电容
,可选择5mA左右的测试电流;对于10uf以下的
电容
,可选择0.2-1mA的测试电流。
3.红色夹接电解
电容
正极,黑色夹接电解
电容
负极。接好后看到电压表指针先匀速缓慢偏转。正常情况下偏转位置应超过额定电压,当达到某一值时其指针偏转变慢,并且越来越慢,最终停止下来,此时电容的漏电流等于Q1集电极的恒流电流,电压表所指示的电压,为此
电容
匝漏电电流为ic时所承受的耐压,可粗略认为是该
电容
的极限耐压。
4.测试完毕后将开关K2闭合,待电容电容放电后取下
东莞市祥如电子有限公司
官方网站:
www.xiangrudz.com
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www.xinagrudz.com
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