8 ways to use clamp ammeter
1. First, make sure the clamp ammeter's voltage level is set correctly. Then, check to see if the insulation is in excellent condition, if it has been damaged, if the pointer swings freely, and if the jaws are corroded, among other things. To choose the meter range, estimate the rated current based on the motor power.
2. Carefully read the instructions before using the clamp ammeter to determine whether it is an AC or AC-DC dual-purpose clamp meter.
1. First, confirm that the voltage level of the clamp ammeter is set properly. Then, examine, among other things, the insulation to see if it is in great shape, if it has been damaged, if the pointer swings easily, and if the jaws are corroded. Estimate the rated current based on the motor power to get the meter range.
2. Before using the clamp ammeter, carefully read the instructions to establish whether it is an AC or AC-DC dual-purpose clamp meter.
4. While measuring, the clamp meter's jaws should be shut tightly. You can open the jaws and try again if there is any noise after closing. If the noise cannot be completely eradicated, see if the magnetic circuit's junction surfaces are smooth and clean. Clear it off.
5. Multi-phase wires cannot be clamped into the clamp window for measurement; the clamp meter can only measure the current of one phase wire at a time, and the wire being tested must be put in the center of the clamp window.
6. The voltage of the circuit being tested must not be greater than the value indicated on the clamp meter, since doing so could easily result in a grounding incident or present a risk of electric shock.
7. Calculate the cage-type asynchronous motor's operating working current. In order to assure the motor's safe operation and increase its useful life, it is possible to verify the motor's operation based on the current's magnitude.
8. It might be measured once for all three periods or once for each phase. The reading on the meter ought to be zero at this point (because the phasor sum of the three-phase current is zero). The meter should read 0 when there are two phase wires in the mouth. The third phase's current value is the one shown on the screen. It is possible to determine whether the motor is overworked by monitoring the current for each phase (the measured current exceeds the rated current value). Whether the three-phase current imbalance exceeds the 10% limit, or whether there is an issue with the power supply voltage.
