The special application of clamp ammeters
(1) When conducting measurements, pinch the wrench tightly with your hand to open it. The position of the measured current carrying wire should be placed in the middle of the clamp to prevent measurement errors. Then, release the wrench to close the iron core, and the meter head will have an indication.
(2) When measuring, it is necessary to first estimate the magnitude of the measured current or voltage, choose an appropriate range or choose a larger range for measurement, and then reduce the range according to the magnitude of the measured current or voltage, so that the reading exceeds half of the scale, in order to obtain a more accurate reading.
(3) To ensure accurate readings, the two sides of the jaws should be well connected. If there is any noise, the jaws can be opened and closed again. If the sound still exists, check for dirt on the joint surface. If there is dirt, it can be wiped clean with gasoline.
(4) When measuring the current of low-voltage fusible fuses or low-voltage busbars, adjacent phases should be isolated with insulation boards before measurement to prevent potential short circuits between phases when the jaws are opened.
(5) Some models of clamp ammeters come with AC voltage scales. When measuring current and voltage, they should be done separately and cannot be measured simultaneously.
(6) Cannot be used for high-voltage live measurement.
(7) After the measurement is completed, be sure to place the adjustment switch at the maximum current range position to avoid instrument damage due to unselected range in the next use.
(8) In order to obtain accurate readings when measuring currents below 5A, if conditions permit, the wire can be wound a few more times and placed in the clamp for measurement. However, the actual current value should be the reading divided by the number of wires placed in the clamp.
