Methods for Measuring Current with a Clamp Meter
1. Before measurement, the clamp gauge should be mechanically zeroed;
2. Choose the appropriate range for the clamp gauge: adjust the range from large to small or estimate based on the nameplate value;
3. When using a clamp gauge to measure the minimum range, if the reading is not yet clear, the measured wire can be wound a few times. The number of turns should be based on the number of turns in the center of the clamp, and the reading=indicated value x range/full deviation x turns;
4. When measuring, the measured wire should be placed in the center of the clamp and the clamp should be tightly closed to reduce errors;
5. After the measurement is completed, the conversion switch of the clamp meter should be placed at the most appropriate range. Simply put, a clamp meter has both numerical and pointer displays. When measuring, estimate the approximate range of the current being measured, pay attention to the selection of the clamp meter range, and try to choose the appropriate range to reduce errors. In addition, try to clamp the wire in the middle of the clamp of the meter. If the measured current is too small, you can wind the wire into multiple pieces and divide the measured value by the number of pieces. Also, be careful not to measure exposed wires to avoid the risk of electric shock. If it is a clamp meter that can measure voltage and other functions, the probe should be unplugged when measuring current. Furthermore, in three-phase loads, clamping one wire with a clamp measures the current of the current of this wire, while clamping two wires measures the current of the third wire.
Precautions for measuring current with a clamp meter
1. The voltage of the tested circuit should be lower than the rated voltage of the clamp meter;
2. When measuring the current of high-voltage lines, it is necessary to wear insulated gloves, insulated shoes, and stand on insulated pads;
3. The jaws should be tightly closed and the range cannot be changed with electricity;
4. Before measuring resistance, the circuit to be tested must be completely discharged and isolated from the power supply circuit;
5. If the test pen or power adapter is damaged and needs to be replaced, it must be replaced with a test pen and power adapter of the same model and electrical specifications;
6. Do not use the instrument when the battery indicator indicates that the power is depleted. If the instrument is not used for a long time, please remove the battery and store it;
7. Do not store or use pliers in high temperature, high humidity, flammable, explosive, and strong electromagnetic field environments;
8. Please use a damp cloth or cleaning agent to clean the outer shell of the pliers. Do not use abrasives or solvents;
9. When the instrument is damp, please dry it before storing it.
