What issues need to be taken into consideration while using the clamp meter?
1) Mechanical zero adjustment is required before measurement, and the appearance of the clamp meter should be checked at the same time.
(2) Select the appropriate range, choose the large range first, and then select the small range or see the nameplate value for estimation.
(3) When the minimum measuring range is used to measure and the reading is not obvious, the measured wire can be wound several times, and the number of turns should be based on the number of turns in the center of the jaw, then the reading = indicated value × range / full deviation × turns number
(4) After the measurement is completed, the transfer switch should be placed at the maximum range.
(5) When measuring, the wire under test should be in the center of the jaws, and the jaws should be closed tightly to reduce errors.
How to use clamp meter
1. Read the instruction manual carefully before use to find out whether it is AC or AC/DC dual-use.
2. The voltage of the circuit under test cannot exceed the value marked on the clamp meter, otherwise it may easily cause a grounding accident or cause an electric shock hazard.
3. Only the current of one phase wire can be measured at a time, and the wire to be tested should be placed in the center of the clamp window, and multi-phase wires cannot be clamped into the window for measurement.
4. Before measuring with the clamp meter, you should first estimate the magnitude of the measured current, and then decide which range to use. If it is impossible to estimate, you can first use the maximum range file and then change it to a smaller one to get an accurate reading. It is not possible to use the low current gear to measure large currents. to prevent damage to the meter.
5. The jaws should be closed tightly during measurement. If there is any noise after closing, you can open the jaws and repeat it again. If the noise still cannot be eliminated, you should check whether the joint surfaces on the magnetic circuit are smooth, and wipe them clean if there is dust.
6. Due to the low precision of the clamp ammeter itself, the following method can be used when measuring small currents: first wind the wire of the circuit under test several times, and then put it into the jaw of the clamp meter for measurement. At this time, the current value indicated by the clamp meter is not the actual value being measured. 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 electricity during maintenance to prevent electric shock.
