电子万用表（Electronic multimeter）.doc

电子万用表（Electronic multimeter） Electronic multimeter Voltage measurement 1 、 measurement of DC voltage, such as batteries, Walkman, power supply, etc.. The black pen is inserted into the com hole, the red pen is inserted into the V. . The knob to large range than the estimated value (Note: on the face of each value is the maximum range, said DC voltage V, V said AC voltage grade, A is the current file), then the probe connected to power supply or battery ends; keep stable contact. The value can be read directly from the display screen. If it is shown as 1., the measurement range is too small. Then, a large number of measurements should be added. If the left appears in the numerical - indicates that the pen polarity and the actual power of opposite polarity at the anode is connected the red pen. 2. Measurement of AC voltage. The measurement probe Jack and the DC voltage, but should be the knob to exchange files can range V ~ desired. The AC voltage has no positive or negative points, and the measurement method is the same as before. Whether measuring AC or DC voltage, should pay attention to personal safety, do not touch the metal part of the pen. Two 、 current measurement 1 、 measurement of DC current. The first black probe into COM hole. If the measured current is greater than 200 mA, will be the red pen into the 10A Jack and the knob to direct 10A; if the current measurement is less than 200 mA, the red pen is inserted into the 200 mA Jack, the knob to the appropriate range within 200 mA dc. When adjusted, it can be measured. String the multimeter into the circuit and keep it steady until you read it. If the display is 1., then to increase the range; if the numerical left - appears, indicates that the current from flowing into the black pen multimeter. 2. Measurement of alternating current. The measuring method is the same as that of 1, but the gear should be switched to the AC gear. After the current measurement is finished, the red pen should be inserted back into