How to use the clamp ammeter and matters needing attention when using it
1) When measuring, squeeze the wrench with your hand to open it. The position of the current-carrying wire to be measured should be placed in the middle of the jaws to prevent measurement errors. Then release the wrench to close the iron core, and the meter will indicate.
2) When measuring, first estimate the size of the measured current or voltage, select the appropriate range or select a larger range for measurement, and then reduce the range according to the size of the measured current and voltage, so that the reading exceeds 1/2 of the scale. in order to get a more accurate reading.
3) In order to make the reading accurate, the two surfaces of the jaws should ensure a good connection. If there is noise, the jaws can be opened and closed again. If the sound still exists, check whether there is dirt on the joint surface, such as Dirt can be wiped off with gasoline.
4) When measuring the current of low-voltage fusible fuse or low-voltage busbar, the adjacent phases should be isolated with insulating plates before the measurement, so as to prevent the short circuit between phases when the jaws are opened.
5) Some models of clamp-on ammeters are equipped with an AC voltage scale. The measurement of current and voltage should be carried out separately and cannot be measured at the same time.
6) Cannot be used for high voltage live measurement.
7) After the measurement, the adjustment switch must be placed in the position of the maximum current range, so as to avoid damage to the instrument due to the unselected range in the next use.
8) In order to obtain a more accurate reading when measuring the current less than 5A, when conditions permit, the wire can be wound several times and put into the jaw for measurement, but the actual
