نشانگر مولتی متر تشخیص خازن
(1) capacity of 0.01 pF or more fixed capacitance detection Pointer multimeter to R × 10k ohm block, and ohm zero, and then use the red and black pens of the multimeter were in contact with the capacitor's two pins, observe the changes in the multimeter pointer, as shown in Figure 1. If the pen is connected to the moment, the multimeter pointer to the right tiny swing, and then back to infinity, switch the pen, and then measure again, the pointer also swings to the right after returning to infinity, you can judge that the capacitor is normal; If the pen is connected to the moment, the multimeter pointer swings to the vicinity of the "0", you can judge that the capacitance is broken or serious leakage; If the pen is connected to the moment, the multimeter pointer swings to "0", you can judge that the capacitance is broken or Serious leakage; if the pen is connected to the moment, the pointer swing no longer back to infinity, it can be judged that the capacitor leakage; if the two multimeter pointer does not swing, it can be judged that the capacitor has been open-circuit.
(2) ظرفیت کمتر از ٪ 7b٪ 7b1٪ 7d٪ 7d.01 pF از ثابت خازن تشخیص تشخیص از 10pF زیر کوچک خازن٪ 2c به دلیل ظرفیت ظرفیت بیش از حد کوچک٪ 2c so اندازه گیری با a مولتی متر٪ 2c can only check whether there is a leakage٪2c internal short-circuit or breakdown phenomenon٪3a measurement of the choice of the multimeter R ٪ c3٪97 10k block٪2c will be two pens were connected to the the capacitance of two pins٪2c the resistance value should be infinity. if the measured resistance is zero٪2c it can be determined that the the capacitor leakage damage or internal breakdown.
(3) test 10pF ~ 0.01; tF fixed capacitance can be used as follows. Will be adjusted to the multimeter R × 10k block, the choice of two news value greater than 100 transistor 3DC6 (or 9013) composed of a composite tube, the circuit using the amplification of the composite tube, the measured capacitance of the charging current to be amplified, in order to increase the oscillation amplitude of the multimeter pointer. The measured capacitance is connected to the base of the composite tube b and collector c between the red and black pens of the multimeter were connected to the emitter e and collector c of the composite tube. If the multimeter pointer swings slightly after the return to infinity, the capacitance is normal; if the pointer does not move or can not return to infinity, then the capacitance has been damaged. In the test operation, especially in the measurement of smaller capacity capacitance, to repeatedly switch the measured capacitance pin contact two points, in order to obviously see the multimeter pointer swing.
