How to Use a Multimeter How to Use a Multimeter
A multimeter is a versatile electronic measuring instrument that measures some parameters such as DC current, voltage, and AC voltage. Divided into digital multimeter, pointer table, etc., is currently widely used is a digital multimeter, covering the ammeter, voltmeter, ohmmeter and other functions, then we take a look at the use of universal table and the use of universal watch precautions!
1. How to use the universal meter - check whether the positive and negative electrodes are correct before use
Before using the universal meter, check whether the connecting wires of the red and black test bars are connected to the corresponding color terminals. The red test measures the positive part of the tested part, while the black test tests the negative part of the test part. When you do not know the positive and negative parts of the part to be tested, it is recommended to set the switch to the maximum DC voltage, and then put the test stick on any pole of the tested part, and then use another test stick at the other end Touch it lightly and observe the deflection of the hands. If the hands are deflected in the positive direction, the red bar is connected to the positive pole and the other is the negative pole. If the pointer is deflected in the opposite direction, the red test stick is in contact with the negative electrode and the other is the positive electrode.
2. How to use the universal meter - change from large to small magnification when used
Some universal meters are also equipped with special high-voltage insulation test leads when measuring high voltages. When measuring, the negative pen must be grounded first, and the other table pen must be set to high potential. Also note that it is not possible to measure the voltage with the resistance and current ranges. When changing the range, the magnification must be changed from large to small. This will not damage the meter.
3. How to use the universal meter - Switch the switch to high position after use
After using the universal meter each time, it is recommended to switch the switch to the high pressure gear position, which is convenient for the next operation. When measuring the resistance with the ohmic file, select the appropriate magnification and let the pointer indicate the place where the scale is thinner. The data thus measured is more accurate.
Multimeter use precautions :
1. Before using the multimeter, first adjust the pointer of the multimeter to zero voltage and current.
2. When measuring the multimeter, do not touch the metal part of the pen with your hands. This will not only make the measurement data more accurate, but also protect personal safety.
3. When measuring the high voltage and current of the same electric quantity during the measurement, it is not possible to shift gears at the same time during measurement. When shifting gears, it is recommended to disconnect the test leads before changing gears. This will not destroy the universal watch.
4. After the multimeter is used, set the switch to the maximum voltage of AC voltage. If you do not use it for a long time, you can take out the battery in the universal meter to prevent the battery from corrosion.
Conclusion: The above is the relevant content of the use of universal watch introduced for everyone, hoping to bring help to friends in need. If you need to learn more about the relevant information in the later period, you are welcome to pay attention to Qijia Information.
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