How do you plug in a multimeter to measure 220v household voltage?
1. Put batteries in the multimeter, the battery compartment is behind the multimeter, and connect the red pen to the voltage interface, and the black pen to the com port.
2. Select the appropriate gear, the gear should be greater than the measured voltage, home electricity for 220V AC, so choose 600V AC gear, the symbol is (V ~). If you can not determine the approximate value of the measured voltage, you can switch to the maximum range gear, and then reduce the range to the appropriate position, the range is too large to affect the accuracy.
3. Insert the pen into the two-hole socket hole, because it is alternating current, so there is no positive and negative points, so directly into it; three-hole socket is usually "left zero right fire on the ground", so insert the following two holes on it.
4. This time the multimeter display will show the number, read out directly is the voltage of the socket is measured, and the actual 220 is normal.
5. If it is DC voltage, gear to choose DC gear, and there are positive and negative points, connected to the reverse reading will show a negative sign.
1, in the size of the measured data is not known, should be the first range switch, placed in the maximum value, and then by a large number of range to the small range gear to switch, so that the instrument pointer indicates in the full scale 1/2 above the place can be.
2, the measurement of resistance, after selecting the appropriate multiplier file, the two pens touch so that the pointer in the zero position, such as the pointer deviates from the zero position, you should adjust the "Zero" knob, so that the pointer to zero to ensure that the measurement results are accurate. If you can not zero or digital display meter issued a low-voltage alarm, should be checked in time.
3, in measuring the resistance of a circuit, you must cut off the power supply of the circuit under test, and do not measure with electricity.
4,When using the multimeter for measurement, pay attention to the safety of the person and instrumentation equipment, the test shall not touch the metal part of the meter pen by hand, and do not allow switching the gear switch with electricity to ensure the accuracy of the measurement and avoid the occurrence of electrocution and burn the instrument and other accidents.
