1. Prohibit measuring uninsulated wires

2. Choose the appropriate range

3. Zeroing

4. Opening and closing of jaws

(1) The movable part of the jaw should open and close freely, and the two joint surfaces should be tight to reduce magnetic flux leakage and improve measurement accuracy;

(2) When there is vibration or collision sound when the wire is clamped into the clamp, the instrument handle should be turned a few times or opened and closed again until there is no noise before reading the current value.

5. Measure small current