How to correctly use a digital voltage meter for measurement?

It is very important to correctly use a digital voltage meter for measurement. The following are the general operating steps:

1. Select the appropriate measurement range: Before performing voltage measurements, first select the appropriate measurement range to ensure that the voltage value does not exceed the instrument's measurement range. If the voltage value is unknown, choose a larger range for initial measurement.

2. Connect correctly: Connect the red test lead of the digital voltage meter to the positive pole and the black test lead to the negative pole. Ensure that the test leads are properly in contact with the corresponding electrodes of the circuit under test to avoid short circuits or incorrect connections.

3. Turn on the power and instrument: Turn on the power of the device under test and switch on the digital voltage meter to ensure that the instrument is functioning normally. Adjust the instrument's function mode, measurement range, and other settings as needed.

4. Measure voltage: Connect the test leads to the two ports of the circuit under test, respectively, and observe the voltage value displayed on the digital voltage meter. Ensure that the test leads are in stable contact to avoid inaccurate data due to shaking or disconnection.

5. Record measurement results: Record the measured voltage value. You can use peak hold, data hold, or other operations as needed. If multiple measurements are required, repeat the above steps.

6. Turn off the instrument: After the measurement is complete, first turn off the switch of the digital voltage meter and then disconnect it from the circuit under test to avoid accidents.

7. Clean and maintain: Regularly clean the surface and wiring parts of the digital voltage meter to ensure the normal operation of the instrument. Avoid dropping the instrument or exposing it to humid environments.

The above are the general operating steps for measuring with a digital voltage meter. Before use, be sure to read the instrument's manual and follow the instructions to ensure accurate measurements and protect the instrument from damage.