如何检测电位器好坏?
检测电位器好坏是否正常一般就是用万用表来检测的,具体的方法步骤如下:
1、用适当的欧姆档量电位器1~3端的总阻值,看是否在标称值范围内;
2、将表笔接于1~2或2~3引出端间,反复慢慢地旋动电位器轴,看电表指针是否连续、均匀地变化。其阻值应在零欧附近标称值之间连续变化。如变化不连续(跳动)或变化过程中电阻值不稳定,则说明接触不良;
3、测量电位器各端子与外壳(金属)及旋转轴之间的绝缘,看其绝缘电阻是否够大(正常应近oo);
4、测量电位器电源开关是否起作用,接触是否良好。
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