How to judge the quality of the capacitor

Capacitor is a kind of electric charge storage components, is also one of the most commonly used electronic components, its classification is rich, including film capacitor, CBB capacitor, gauge capacitor and so on, is widely used in various fields. Under normal circumstances, to judge the quality of capacitors, the R×10, R×100, R×1K blocks of the multimeter will be used to test and judge. The red and black pen are respectively connected with the negative pole of the capacitor (each test before the capacitor discharge), by the pendulum of the needle to determine the quality of the capacitor. If the needle quickly to the right, and then slowly left back to the original position, generally speaking, the capacitor is good. If the needle is no longer rotating, the capacitor has been broken down. If the needle is gradually returned to a position to stop, it indicates that the capacitor has leakage. If the needle does not swing up, the capacitor electrolyte has dried up and lost capacity.

How to judge the quality of the capacitor

Capacitor is a kind of electric charge storage components, is also one of the most commonly used electronic components, its classification is rich, including film capacitor, CBB capacitor, gauge capacitor and so on, is widely used in various fields. Under normal circumstances, to judge the quality of capacitors, the R×10, R×100, R×1K blocks of the multimeter will be used to test and judge. The red and black pen are respectively connected with the negative pole of the capacitor (each test before the capacitor discharge), by the pendulum of the needle to determine the quality of the capacitor. If the needle quickly to the right, and then slowly left back to the original position, generally speaking, the capacitor is good. If the needle is no longer rotating, the capacitor has been broken down. If the needle is gradually returned to a position to stop, it indicates that the capacitor has leakage. If the needle does not swing up, the capacitor electrolyte has dried up and lost capacity.

Some leakage capacitors, with the above method is not easy to accurately judge the good or bad, and will affect the film capacitor, CBB capacitor, gauge capacitor and so on in the actual application. Therefore, the correct judgment of leakage capacitor method appears very and always.
When the condenser pressure value is greater than the multimeter in battery voltage value, according to the electrolytic capacitor is small leakage current when charging, the characteristics of leakage current when reverse charge, R x 10 k block, can be used to reverse the capacitor charging, whose hands resting place to observe whether stability (i.e., reverse leakage current is constant), the judge capacitor quality, higher accuracy. Black pen capacitor negative, red pen capacitor positive, the needle quickly pendulum up, and then gradually retreat to a place to stay, the capacitor is good, all the needle in a position to stay unstable or stay and gradually move to the right of the capacitor has leakage, can not continue to use. The hands generally stay and stabilize in the 50-200K scale range.

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