Цифровой мультиметр экран имеет a цифровой дисплей функция может не может не будет б/3f
1) Суждение о хорошем и плохом
первый шаг: выбор шестеренка. цифровой мультиметр переключатель к т маркировка "Ω" символ из шестеренка, выбранный "диод с зуммер" диапазон шестерня.
Step 2: test operation. Two pens are not divided into positive and negative, respectively, contact the two pins of the capacitor. At this time, the LCD screen shows the number of rapid flashing immediately after the start of the symbol (or "overflow symbol") "1", and then exchange the pen to measure again. At this time, a negative sign "-" appears in front of the number displayed on the LCD screen, and then the number flashes rapidly and the start symbol "1" appears. The above situation shows that the capacitor under test, the positive and negative charging process is normal, is good. If in the above test process LCD screen shows the number in the rapid flashing can not show "1", and has been an unstable resistance reading, that the capacitor under test leakage; If in the exchange of the pen in the two tests, the LCD screen are shown "0 "(or close to "0"), the buzzer has been non-stop, that the capacitor under test has been short-circuited; if only show the overflow symbol "1", there is no digital flashing process, that the capacitor under test is disconnected.
Примечание: для больше емкость конденсаторы, когда the два ручки контакт к к конденсатор контакт вкл оба концы of the момент, зуммер будет a a короткое звучание процесс, больше емкость из конденсатор, зуммер звук длиннее процесс. Это есть потому из большой емкости конденсаторы в в начало зарядка%2с цепь имеет а большая число из разнородные заряды к конденсатор'с две пластины, соответственно, к к перемещение%2с накопление%2с так то ток в цепь есть больше, нижний импеданс вызванный посредство посредство посредство%2с в тест из большая емкость конденсаторы%2с перо контакт конденсатор контакт выводы может не быть слишком короткий%2с иное оно есть легко к причина неправильная суждение.
третий шаг%3а ли утечка обнаружение суждение.
When the second step of the above detection is completed, the digital multimeter LCD screen on the end of the digital flashing process, only show the overflow symbol "1" no longer change, that the capacitor under test the end of the charging process, the two sides of the energy storage voltage has been about 2.6V (the voltage is the digital multimeter in the use of diode block between the two pens). voltage). At this time, the pen away from the capacitor's pins, and then the digital multimeter switch to the DC voltage measurement marked with the "V-" symbol within the range of the block, select the 20V range block, and then the two pens were contacted with the capacitor's two pins, the storage voltage on both ends of its detection. Observe the LCD screen voltage value drop Speed of fast, slow, you can judge whether the capacitor under test leakage - if the voltage reading to an extremely slow rate of gradual decline, which is the capacitor's stored energy through the "table resistance" in the slow release, indicating that the capacitor being measured Capacitor No leakage phenomenon; If the voltage reading drops rapidly, quickly down to 0, then the capacitor under test leakage phenomenon, can not continue to use in the circuit.
