When the current is on, the multimeter cannot test the resistance. Why?
When using a multimeter to measure the resistance of the resistance profile, through the built-in battery meter to measure the measured resistance discharge, discharge x0d flow to determine the resistance of the meter.x0d due to battery is normally dry battery 1.5 volts, so the discharge current is limited, and the current direction can not be changed, no x0d will cause any impact on the meter meter.
But if the x0d voltage is very high, the current flowing through the resistor, the voltage drop across the resistor exceeds 10 volts, either forward or reverse, there are x0d meters through the current may be caused by too much damage to the.x0d meter so don't resistance energized with a multimeter resistance profile measurement, is a because the measurement results can not be accurate, two is the possible damage caused by x0d measurement meter.
If there is a current measurement resistor (voltage), it will connect the meter in the part of the current through the meter bypass.x0d if the circuit voltage is very low (for example, the voltage drop across the resistor is less than 1 volts), most will cause no numerical measurement;
