電解電容器是電路中常見(jiàn)的電子元器件，三和品牌的電解電容是性?xún)r(jià)比很高的一款韓系品牌的電容，在電路中的主要用途有儲(chǔ)能、電源濾波、隔直流、耦合、補(bǔ)償?shù)?。今天小編和大家分享一個(gè)簡(jiǎn)單的方法來(lái)檢測(cè)電解電容是否完好無(wú)損。

　　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、首先檢查電容的外觀是否有問(wèn)題，比如是否有鼓包或者漏液等現(xiàn)象，就應(yīng)該立即更換！即使還能夠正常使用，但是其性能明顯下降，具有很大隱患！

　　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、使用萬(wàn)用表蜂鳴檔進(jìn)行檢測(cè)，這種方法只能粗略判斷電容是否短路，因?yàn)殡娙菔Ф搪芬彩呛艹Ｒ?jiàn)的事。當(dāng)測(cè)量電容兩端時(shí)，萬(wàn)用表開(kāi)始蜂鳴，持續(xù)一段時(shí)間后消失，說(shuō)明電容并沒(méi)有短路；若一直蜂鳴表明該電容一短路。剛測(cè)量時(shí)之說(shuō)以會(huì)蜂鳴，是因?yàn)榻o電容充電，形成電流，當(dāng)充電完成后停止蜂鳴。

　　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、直接使用萬(wàn)用表的電容檔測(cè)量其電容值，若偏差遠(yuǎn)超過(guò)20%說(shuō)明該電容已經(jīng)變質(zhì)。

　　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、也可以使用萬(wàn)用表的電阻檔進(jìn)行測(cè)量，正常情況剛開(kāi)始測(cè)量時(shí)會(huì)有數(shù)字顯示，然后緩慢變大直至較大阻值（一般幾百KΩ以上）。若顯示電阻阻值一直很小，說(shuō)明幾乎短路；若剛測(cè)量瞬間顯示數(shù)字就一直為一般幾百KΩ以上，而且?guī)缀醪蛔?，說(shuō)明電容已經(jīng)變質(zhì)。

　　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。