ポインタ マルチメータ to measure the circuit good or bad to adjust in what gears
一般的に speaking, the measurement of the circuit, in the case of the circuit is charged, to measure the DC voltage, so the gear should be placed in the DC voltage file, as to which file, depending on the circuit you measure the situation, the measurement of DC current is very little, because the measurement of the current to be disconnected from the the circuit at a certain point for measurementです。
In the case of the circuit is not charged, the main measurement of the circuit of the DC resistance, the general multimeter gear in the ohm gear 1K gear measurement of the majority, as for the measurement of which points, depending on your familiarity with the circuit and mastery of the the situation.
使用 a デジタル マルチメーター に 修理 マザーボード, the main use of several gears, 1: diode gear: used to run the line, measuring the resistance to ground, measuring the line on and off, 2: resistor block is used to measure the resistance of the motherboard resistor, 3: DC 20V voltage block, because the highest voltage on the motherboard is only 12V Repair of the マザーボード は 主に rely on the measurement of the resistance to ground, and the voltage to ground to determine the fault, using the measurement of the current is too little.
ノート オン 使用 of マルチメータ:
(1) IN the use of the the multimeter should be carried out before the "mechanical zero", that is, in the absence of measured power, so that the multimeter pointer in the position of zero voltage or zero current.
( (2) In the process of using the multimeter, you should not touch the metal part of the pen with your hand, so as to ensure the accuracy of the measurement on the one hand, and ensure personal safety on the other hand.
(3) When measuring a certain amount of electricity, you should not change the gear at the same time of measurement, especially when measuring high voltage or high current, you should pay more attention to it. Otherwise, the multimeter will be destroyed. If you need to change gears, you should first disconnect the pen, change gears and then go back to the measurement.
(4) When using the multimeter, it must be placed horizontally to avoid errors. At the same time, it should also be noted to avoid the influence of external magnetic field on the multimeter.
(5) いつ マルチメーター is finished using, the changeover switch should be placed in the maximum gear of AC voltage. If it is not used for a long time, the battery inside the multimeter should be taken out to avoid the battery corrosion of other devices inside the meter.
