Introduction to the use of clamp meter

　　2. The voltage of the circuit under test cannot exceed the value indicated on the clamp meter, otherwise it will easily cause a grounding accident or a risk of electric shock.

　　3. Only one-phase current can be measured at a time. The measured conductor should be placed in the center of the clamp window. Multi-phase conductors cannot be clamped into the window for measurement.

　　4. Before measuring with a clamp meter, you should first estimate the magnitude of the current being measured, and then decide which range to use. If you cannot estimate, you can first use the maximum range and then change to a smaller range to get an accurate reading. Do not use a small current range to measure a large current to prevent damage to the instrument.

　　5. The jaws should be closed tightly during measurement. If there is noise after closing, open the jaws and close them again. If the noise still cannot be eliminated, check whether the joint surfaces of the magnetic circuit are smooth and clean if there is dust.

　　6. Since the accuracy of the clamp meter itself is low, when measuring small currents, the following method can be used: first wrap the wire of the measured circuit several times, and then put it into the jaws of the clamp meter for measurement. At this time, the current value indicated by the clamp meter is not the actual value of the measurement. The actual current should be the reading of the clamp meter divided by the number of turns of the wire.

　　7. Do not operate with power on during maintenance to avoid electric shock.