How to detect whether the potentiometer is good or bad

Detecting whether the potentiometer is normal or not is generally tested with a multimeter. The specific method steps are as follows:

1. Use an appropriate ohm level to measure the total resistance of the 1 to 3 ends of the potentiometer to see if it is within the nominal value range;

2. Connect the test leads between the 1~2 or 2~3 terminals, and slowly turn the potentiometer shaft repeatedly to see if the meter pointer changes continuously and evenly. Its resistance value should continuously change between the nominal value near zero ohm. If the change is discontinuous (jumping) or the resistance value is unstable during the change, it means that the contact is poor;

3. Measure the insulation between each terminal of the potentiometer and the housing (metal) and the rotating shaft to see if the insulation resistance is large enough (normally it should be close to oo);

4. Measure whether the power switch of the potentiometer works and whether the contact is good.