工具:
电阻、万用表。
步骤如下:
1、连接表笔,打开万用表,将红色表笔插入VΩ档,黑色表笔插在COM端,确保万用表正常运行;
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/203fb80e7bec54e72ce277f2b7389b504ec26acb?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、旋转万用表档位,测量电阻需要使用电阻档,可以旋转到预估值的档位,比如200Ω档;
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/b58f8c5494eef01f15c77529eefe9925bd317d0e?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、然后连接电阻器的两段,因为正负之分,所以表笔可以随便来接,但是请务必要确保接触良好;
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/8435e5dde71190ef521cff33c01b9d16fcfa6072?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、然后读出万用表显示的数据,如果万用表没有数据出现,有可能是电阻器坏了,当然还有一种可能就是量程不够,更换量程;
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/8ad4b31c8701a18b2ae67ea3902f07082938fec9?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
5、把量程增大,如果一直没有数据那只能说明电阻器坏了,如果有数据读出数据,注意加上档位的单位。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/0df3d7ca7bcb0a462e11e7d56563f6246b60af2f?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)