When using this type of insulation resistance meter, you should pay attention to the following items:

1. Confirm that the measured object is safely grounded and the measured object is not charged.

2. Confirm that the E terminal (grounding terminal) of the meter is grounded.

3. After the test, please turn off the high voltage and working power supply in time. Always keep the exterior clean, and wipe it with a clean cloth if necessary. When the meter is not used for a long time, the battery must be taken out to avoid corrosion of the meter, and the meter must not be exposed to moisture, rain, exposure or falling, etc.

4. After the reading is completed, first press the button to turn off the high pressure, and the high pressure indicator goes out. Then put the function selector switch in the "ON" gear and turn off the power. For capacitive loads, the residual charge on the test piece should be discharged, and then the test line should be removed to avoid electric shock.

5. When measuring the high insulation resistance value, a conductor protection ring should be put on the surface between the two ends of the test object, and the conductor protection ring should be connected to the protection terminal of the meter with a test to eliminate the surface leakage of the test object The measurement error caused by the current ensures the accuracy of the test.