How to use the line multimeter? How to use multimeter
To measure whether the line is connected, you can use a multimeter to measure it. When measuring, choose the ammeter pointer to be close to the deflection of 0 ohm. If the line is in the circuit, connect one end (A end) of the line to the multimeter (red stylus) for 100 ohms, and connect the black stylus to the other end (B end) of the line to be measured. If the measured result is zero, it means that the line is connected, which is also called a path. Only through the path can current flow in the circuit. If it is measured that the multimeter ohmmeter pointer at the A end to the B end of the line is not close to zero ohm, the line is already in an open circuit state, and disconnection is called open circuit or open circuit.
Instructions for use of multimeter
Take MF30 multimeter as an example to explain the reading of multimeter. The first scale line indicates the resistance value, with infinity at the far left and zero at the right, with uneven scale in the middle. There are R×1, R×10, R×100, R×1K and R×10K resistance files, and the actual resistance value (in ohms) can only be obtained by indicating the multiple of the scale.
For example, if a resistance is measured with R×100, and the pointer indicates "10", then its resistance value is 10×100=1000, that is, 1K. The second scale line is shared by 500V and 500mA files. It should be noted that the indication principle of voltage and current files is different from that of resistance files. For example, 5V file means that this file can only measure the voltage below 5V, and 500mA file can only measure the current below 500mA. If it exceeds the range, the multimeter will be damaged.
Note: The multimeter should be placed horizontally when used. The red stylus is inserted in the+hole and the black stylus is inserted in the-hole. When testing the current, use the current gear instead of misusing the voltage gear and electric block. Otherwise, the fuse in the multimeter will be burned lightly and the meter will be damaged seriously. If you don't know the range in advance, try to measure with the maximum range, then disconnect the measuring circuit and shift gears. Never switch the range online. If the hands of the watch are rapidly deflected to the end, the circuit should be disconnected immediately for inspection.
Finally, there is a rule, that is, it is agreed that the multimeter after use should be
