Capacitor manufacturer, the price of capacitor, capacitor which is good

Problems often encountered in life capacitor, the us is how to judge capacitor is there bad? Here are from easy cool bring you judge capacitor of the three methods. Method one: the most direct the most simple and most dangerous method, charge and discharge test, connected directly with 220 v ac, we can pick up a pole, with another power cord touch another capacitance feet, 1 ~ 2 s ( Time can not too long, otherwise it will damage the capacitor) , let the capacitor charging, make its short lead, such as instant strong spark, and have 'will beep' sound, then capacitor is normal; As only a small spark, or very slight 'will beep' sound, that capacitor capacity has decreased; If no spark nor sound, the capacitor damage! Method 2: pointer multimeter, also can use the digital meter capacitance measurement file. If use pointer multimeter, general use R x 1 k file, pens and respectively connected to the poles of capacitance. Multimeter pointer will swing at this moment, then slowly back to zero or near zero. The capacitor is good. The greater the capacity of capacitor, the longer the charge time, pointer swing in the direction to 00 also slower. If, after connect a pointer still shows very little resistance does not move, you can be sure is bad. Method 3: digital multimeter detection with digital multimeter to check, to set the digital multimeter to the appropriate resistance, red pens and and black pens and contact the poles of the measured capacitor, respectively. At this point, the display value will increase, beginning from 000 until the display symbols '1'. If always shows 000, internal short circuit capacitor. If always show overflow, may be internal capacitor electrode open, may also be a choice of resistance is not appropriate. In order to see from the screen of capacitor charging process, with different capacity of the capacitor should choose different resistance of gear. Select resistance principle is: capacitor is larger, should choose low blocking; Capacitor capacity is small, should choose high block. If small capacity were examined with a low blocking capacitor, due to the charging time is short, always show overflow, can't see the change process, which has open easily mistaken for capacitor. If use high block check high-capacity capacitor, the charging process is very slow, measuring time need more and long. For 0. More than 1 ~ 1000 uf capacitor can choose resistance (according to the following table The charging time in table display file changes from 000 to the time needed for overflow) 。 ( Buzzer file if can also) The selection of resistance measurement of a capacitor, capacitor after breakdown or open, can't repair, only change is the new capacitor.

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