The operation of the DC resistance tester requires a series of steps, including understanding the use of the rotating mouse, correct wiring, booting, and testing menus. In these process steps, we must pay attention to safety.

1. Before using the DC resistance tester, check whether the input and output lines are intact. After confirming, plug in the power cord. At this time, the power indicator lights up, indicating that the power line is connected. If there is an abnormal phenomenon, check the cause and deal with it.

2. Check whether the range of the voltmeter is appropriate and whether the voltage regulator is above the zero position. When selecting the range, make the selection according to the actual situation. When measuring the resistance of the whole machine and measuring the resistance of isolation, poles and grounding, they require different ranges.

3. When connecting the output line to the test product, pay attention to placing the current line outside the voltage line. When starting the test, keep the test product in a proper connected state, press the button of the DC resistance tester, and the indicator light will turn on.

4. Adjust the voltage regulator to make the current evenly rise to the corresponding current value, and observe the change of the pointer. If an offset occurs, modulation must be carried out at any time to ensure the accuracy of the detection. After the detection is completed, the test record must be done for future review.

When using the DC resistance tester, you must be proficient in operating methods and take safety precautions. If it is found that the resistance tested by the sample is abnormal, the DC resistance tester must be calibrated first, or the test must be re-tested to see if the data differs greatly. If it is not normal, repair it.