电解电容器是电路中常见的电子元器件，三和品牌的电解电容是性价比很高的一款韩系品牌的电容，在电路中的主要用途有储能、电源滤波、隔直流、耦合、补偿等。今天小编和大家分享一个简单的方法来检测电解电容是否完好无损。
electrolytic capacitor is a common electronic component in the circuit. sanhe brand electrolytic capacitor is a korean brand capacitor with high cost performance. its main uses in the circuit are energy storage, power filter, dc isolation, coupling, compensation, etc. today, i would like to share with you a simple method to check whether the electrolytic capacitor is intact.
1、首先检查电容的外观是否有问题，比如是否有鼓包或者漏液等现象，就应该立即更换！即使还能够正常使用，但是其性能明显下降，具有很大隐患！
first, check whether there is any problem with the appearance of the capacitor, such as bulge or leakage, and replace it immediately! even if it can still be used normally, its performance is obviously degraded, which has a great hidden danger!
2、使用万用表蜂鸣档进行检测，这种方法只能粗略判断电容是否短路，因为电容失效短路也是很常见的事。当测量电容两端时，万用表开始蜂鸣，持续一段时间后消失，说明电容并没有短路；若一直蜂鸣表明该电容一短路。刚测量时之说以会蜂鸣，是因为给电容充电，形成电流，当充电完成后停止蜂鸣。
using the buzzer of the multimeter to detect, this method can only roughly judge whether the capacitor is short circuited, because it is also very common for the capacitor to fail and short circuited. when measuring the capacitance at both ends, the multimeter starts to beep and disappears after a period of time, indicating that the capacitance is not short circuited; if the buzzer keeps ringing, it indicates that the capacitor is short circuited. it is said that the buzzer will occur during the measurement because the capacitor is charged to form a current, and the buzzer will stop when the charging is completed.
3、直接使用万用表的电容档测量其电容值，若偏差远超过20%说明该电容已经变质。
directly use the capacitance of the multimeter to measure its capacitance value. if the deviation is far more than 20%, the capacitance has deteriorated.
4、也可以使用万用表的电阻档进行测量，正常情况刚开始测量时会有数字显示，然后缓慢变大直至较大阻值（一般几百kω以上）。若显示电阻阻值一直很小，说明几乎短路；若刚测量瞬间显示数字就一直为一般几百kω以上，而且几乎不变，说明电容已经变质。
you can also use the resistance gear of the multimeter to measure. normally, there will be a digital display at the beginning of the measurement, and then slowly increase the value until the resistance is larger (usually more than several hundred k ω). if the displayed resistance value is always very small, it indicates that there is almost a short circuit; if the number displayed at the moment of measurement is always more than a few hundred k ω and almost unchanged, it indicates that the capacitance has deteriorated.