1. Before using the insulation resistance tester. Before unpacking and use, it needs to be charged, and the charging time should not be less than 6 hours. Charging before use can not only protect the insulation resistance meter from damage due to high current caused by use when it has only a weak current, but also ensure the normal operation of the insulation resistance meter and ensure the accuracy of the measurement.

2. When using the insulation resistance tester. 1. When you start to use the insulation resistance tester, press the power switch, and the indicator light of the insulation resistance tester switch is lit. 2. After the power indicator light is on, the insulation resistance tester will perform its own whole machine test. At this time, the operation guide will appear on the display of the resistance tester. Follow the instructions to proceed to the next step. 3. Press the "voltage selection key" to select according to the required voltage. 3. Press the "Test button" to start the test. Once the test starts, the indicator light representing the high voltage state will light up, and with a beep every second, the buzzer can sound continuously, indicating that there is a high voltage input at the front end of the insulation resistance meter.

3. After using the insulation resistance tester. After the test is completed, the test result will be displayed on the display of the insulation resistance meter. If you want to perform the second test, you can press the "test button" again. At this time, the insulation resistance meter will stop the high-voltage output of the front end, and automatically calculate again and display the test result.