(1) Before testing the circuit, check whether the insulation shell of the clamp gauge iron core is intact and undamaged. Check if the jaws are securely closed.

(2) Opening the instrument panel and displaying "OL" indicates that the instrument panel is functioning properly and can be tested

(3) When measuring, try to pass the measured wire through the center of the clamp as much as possible. You can test several times and read the value to make the reading accurate.

(4) When measuring a small current, if conditions permit, the wire can be wound a few more turns and then clamped with pliers. The value tested in this way is a multiple of the number of wire turns, and the value is relatively accurate

(5) After the inspection is completed, close the instrument and clean the jaws so that the instrument is in good condition for the next use.