Troubleshooting method of clamp ammeter
1. When measuring current or voltage, there is no indication for one or several gears, and the other gears indicate normal. The reason is that the tightening switch screw of the clamp meter is loose, or the connection on its branch switch is twisted and broken. This kind of failure is the most common, and the disconnection can be connected after opening the cover.
2. The reading of the current file is too small, and the reading of the voltage file is normal.
Most of the reasons are due to poor contact between the jaws and too much magnetic flux leakage. The jaws should be corrected to make good contact. This kind of fault is sometimes caused by the short circuit between the windings, which is more troublesome at this time. Generally speaking, it is necessary to rewind according to the original data, and it must also be aged.
3. The readings of the current and voltage gears are on the low side, which often occurs on the internal magnetic clamp meter. The reason is that the magnet is demagnetized, which should generally be solved by magnetization, and can also be adjusted by reducing the resistance value in series with the meter branch.
4. If the reading of one of the gears is inaccurate, the corresponding resistance should be adjusted.
5. The voltage gear indication is normal, and the current gear has no indication. Use a multimeter to check the primary switch and secondary winding to see if there is any abnormality.
6. All without instructions.
The rectifier diodes, meters, switches, and wiring connected to or related to the clamp meter should be checked for breaks.
