1、首先连接表笔,万用表的选择可以是指针也可以是数显的,红色表笔插入VΩ档,黑色表笔插在COM端,确保万用表正常;
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/0b46f21fbe096b630de6568902338744eaf8ac68?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,测量电阻就要使用电阻档,如果不确定电阻值多少,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/80cb39dbb6fd526641d534cda518972bd5073668?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、连接电阻器的两段,表笔随便接,没有正负之分,一定要确保接触良好;
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/8c1001e93901213f8aca46055ae736d12e2e9569?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、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/79f0f736afc37931a5f28ff0e5c4b74542a91154?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,如果有数据付出数据,注意加上档位的单位。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/5366d0160924ab1803eee9ee3bfae6cd7a890b6a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)