万能表使用（Universal Watch）.docVIP

万能表使用（Universal Watch） In here, it introduces the measuring tools of the components -- multimeter. Universal meter is divided into pointer type and digital multimeter. Digital multimeter is popular because of its good performance and low price. In addition to the function of a pointer meter, the digital multimeter can also be used to measure capacitance, frequency, temperature, etc., and the number of readings is displayed, so the user does not have to worry about the number of mistakes. Now we will introduce the use of each file one by one. First of all, the upper surface is liquid crystal display, in the middle part is the function selection button, the lower is the pen jack, divided into com - that is common or - and + end to end, there is a power jack, measured the triode beta value of measuring capacitance and Jack jack. Many functions, whether you echocardiography? Measurement of voltage 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. T