1. Do not use the meter where flammable and explosive materials are placed;
2. Before turning on the power, make sure that the ground resistance tester is reliably grounded;
3. Before the test, it should be noted that the test product and the test clamp must be in good contact, otherwise the measurement data will be inaccurate or the test instrument will automatically stop the test if the current is faulty;
4. The test clip has good elasticity, otherwise it will cause measurement errors;
5. If the test current is greater than 29A, the tester considers that the current is faulty, alarms and automatically stops the test;
6. To ensure the accuracy of the test, the test time of each ground resistance test should be no less than 3 seconds, and the reading should be performed after the data is stable;
7. You must read the instruction manual before you work, and consult a technical staff if you have any unclear points;
8. If the grounding resistance tester fails, please consult the technicians, and do not open the case at will;
9. It must be warmed up for 10 minutes each time it is turned on, otherwise its accuracy cannot be guaranteed.