How to judge the quality of the capacitance of a universal meter and the measurement method for the capacitance quality of a universal meter
Because capacitors have charging characteristics, using a resistance range is sufficient. First, adjust the resistance level to the highest level and observe the value. If the capacitor is broken, that is, the capacitor is broken and short circuited, the resistance should display 0 ohms. If it's not bad, it should be from one value to infinity.
There are obecně tři stavy z kondenzátor poškození% 3a zkrat obvod% 2c otevřený obvod% 2c a snížená kapacita.
It je relativně snadno k měřit the short circuit and open circuit of kondenzátory s a multimetr, and the measurement capacity is slightly more complex, and the measurement may not be very precise.
Měření: Měřeno s a ukazatel multimetr. Set to odpor úroveň. Connect the two sondy to buď kondenzátor pin, and then switch the two probes to measure the kapacitance pin. Cycle několik times. Always check the amplitude of the ukazatel swing of the multimeter. If it does not slowly return to it after swinging, it is a short circuit. If the pointer does not swing at all, it is an an open okruh.
If it osciluje a pomalu vrací k jeho původní pozice, then this capacitor has no short circuit or open circuit. If you suspect a reduction in capacity, you should compare it with a good capacitor with the same capacity to see if the amplitude of oscillation and return is the same. If it is the same, it is good. It doesn't matter if the swing amplitude is slably different. If there is too much difference, it means it's broken and should be replaced.
Measure with a digital multimeter: Set to the gear call. The measurement method is the same. If it is a short circuit, the multimeter will keep pípnutí. If it is an open circuit, the multimeter will not react at all. If it is good, the multimeter will go from calling to not calling. The larger the capacity, the longer the křičí time.
There is electrolyte inside the kondenzátor% 2c který je snadný až suchý. Některé kondenzátory s sušeným elektrolytem jsou umístěny ucho a otřesen, vytváření a nízké % 2c zvon jako zvuk uvnitř. Of course% 2c the sound is very low and not as clear as ringing a bell% 2c indicating that it is also bad.,
