Clamp meters basically use the principle of magnetic induction to produce non-contact measurements of AC electric current. An electric current that flows in a cable conductor will produce a magnetic field. Meanwhile, a transformer that is inside the clamp meter will feel dynamic fluctuations and convert it through the clamp meter display that you can see.
1. Setting the clamp meter switch to the ampere meter (A) position 2. Press the trigger to open the clamp meter jaw in the middle of the jaw clamp, then release the trigger. 3. Connect the cable to the device where the electric current will be measured 4. Read the amperage value in the clamp meter display
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