What is the effect of dialing a digital multimeter to 1000V DC voltage to measure 220V AC power
Previously in the unit, encountered this situation, some just came in the small apprentice often confused AC and DC gear. Lightweight measurements are incorrect, heavy damage to the multimeter.
Strictly speaking, the multimeter is not allowed to use the wrong gear. I remember when I was studying, on the sentence "do not look at the gear, do not use the table", the whole study 60 mornings, every morning in class, the first thing is the multimeter to select the gear measurement.
If you just discuss the study or misuse of the multimeter gear, that's another story. The result of using the 1000v DC voltage of a digital multimeter to test the 220v AC voltage is that the display will show a number from 0 to a few volts jumping all the time, and the - sign in front of the number will also jump all the time. The result of the display has no reference significance.
After the measurement, some multimeters can still be used normally, and some multimeters so that the gears are chaotic display. This may have something to do with the model number of the multimeter.
As long as there is a bit of common sense people will not go to take the 1000V DC block to measure 220 AC!
First of all. Digital multimeter DC voltage block measurement of AC voltage will generally jump under the bottom number, the measured AC voltage after resistor voltage divider attenuation to 200mV RMS sent to the basic table for measurement, 7106 basic table can not recognize the AC signal, so there will be jumping or display 000 can not be measured.
And again. Digital multimeter, if it is the AC block to measure DC is also generally displayed 000 or jump number,.
If it is a pointer multimeter, DC voltage block to measure AC power will not be measured, but if the AC voltage block to measure DC voltage, then the measured value is twice as high as the actual value, because the AC voltage block has a diode rectifier, after the diode rectifier to the meter head of the signal reflecting the average value of the AC power, so it should be more than double.
I personally saw an electrician with a digital multimeter to measure the generator's AC voltage, should be screwed to the AC 1000V gear, the wrong gear screwed to the DC 1000V gear, just a measurement of the instant table on the smoke. I dismantled the meter for him and saw that the circuit board was burned out, so I threw it away directly.
Will not burn the digital multimeter, but the display number is not the real AC voltage value. Therefore, do not do this. It is like using a measuring tape to test the weight of an object does not make sense.
