What Preparations Should Be Made Before Using The Power Clamp Ammeter?

What preparations should be made before using the Gas filled cabinet clamp meter?
(1) Appearance inspection. All parts should be intact; the clamp handle should be flexible; the iron core of the jaws should be rust-free and tightly closed; the iron core insulation sheath should be intact; the pointer should be able to swing freely; the gear change should be flexible and the hand feel should be obvious.
(2) Adjustment. Lay the meter flat and the pointer should point to zero, otherwise adjust it to zero.
How to use a clamp meter to measure current?
When measuring, hold the jaw switch tightly, and after the jaws open, put the jaws on the wire to be measured, relax the four fingers, the jaws automatically close, and the clamp meter immediately indicates the current value. Pay attention to the movement of the pointer on the meter. The reading indicated by the pointer after it stabilizes is the measured current value. It must be pointed out that the clamp ammeter must not be used to measure on poorly insulated or bare wires.
How to use a clamp ammeter to measure the starting current of a three-phase motor?
If you use a clamp ammeter to measure the starting current of a motor, you should first adjust its current range to a larger value (about 10 times the rated current of the motor), and then put the clamp ammeter jaws on the wire. At the moment of starting the motor, the reading indicated by the pointer is the starting current value of the motor.