How to fix it when the multimeter measures 220V AC voltage with 20ma current gear and burns
How to fix it when the multimeter measures 220V AC voltage with 20ma current gear and burns
The fuse must have been burnt. Change the fuse first to see if it can work normally. If you are lucky, the fuse is just broken.
The multimeter was burned out when measuring the voltage, and the AC gear had been adjusted to 750 volts
Possibility of cause of damage:
1. The voltage is higher than 750V;
2. Although the voltage is within 750, it is a method not allowed by most instruments to switch gears during the measurement operation;
3. Misunderstanding the gear position, the actual gear position is placed in the wrong gear such as the resistance gear.
The digital multimeter will burn the meter when measuring the AC current with the DC gear. Generally, the digital multimeter will be burned under what circumstances
Will not burn the watch.
The following situations will burn the meter:
1. Measure too high voltage.
2. The measuring switch of the multimeter is in the current position, and the red test lead is also in the current jack. As a result, it is accidentally used to measure the voltage, and the meter burns 100%. And it is very dangerous and may cause personal injury.
3. The limit is exceeded when measuring the current.
How to repair the multimeter to measure the AC voltage and burn the insurance
When the voltage is measured in the resistance gear, the fuse in the meter is burnt out. Replace the fuse. In addition to measuring AC,
When using a multimeter, I wrongly used the diode file to measure the AC 400V voltage, what components will be burned?
Burned may be:
1) The current limiting resistor connected in series with the meter head;
2) the header itself;
I suggest you try the current file:
If the current file does not display the current, it can actually pass the current. Then it can be proved that there are only the above two damage possibilities.
If the current gear has neither a display value nor an actual current passing through, the damage has been extended to the current gear resistor and the core chip in it.
