How to use a multimeter to measure the quality of electrolytic capacitors and solid-state capacitors
(1) First put the multimeter in the resistance gear
(2) Use the two test pens of the multimeter to contact the two ends of the electrolytic capacitor respectively
At this time, the pointer of the multimeter will deflect clockwise to the right. When the pointer is deflected to a certain position, the pointer of the multimeter will stop for a while, and then slowly deflect to the left until it returns to zero.
(3) Then switch the two test pens of the multimeter, and press (2) to test again.
If the two measurements are the same as (2), it means that the electrolytic capacitor is good.
If the following two situations occur in the measurement, it means that the electrolytic capacitor is bad:
(1) Electrolytic capacitor breakdown short circuit
When measuring, when the two test pens of the multimeter are used to contact the two ends of the electrolytic capacitor, the pointer of the multimeter will deflect clockwise to the right. It will slowly deflect to the left. If it is found that the pointer of the multimeter cannot be deflected to the left, it means that the electrolytic capacitor has been internally broken down and short-circuited. Such an electrolytic capacitor cannot be used.
(2) Leakage of electrolytic capacitors
When measuring, when the two test pens of the multimeter are used to contact the two ends of the electrolytic capacitor, the pointer of the multimeter will deflect clockwise to the right. It will slowly deflect to the left. If it is found that the pointer of the multimeter can slowly deflect to the left but cannot return to zero, it means that there is leakage inside the electrolytic capacitor, and such an electrolytic capacitor cannot be used.
