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MEASURING AC & DC VOLTAGE
Voltage means the difference in electrical potential between two points. The
polarity of AC voltage varies over time, while the polarity of DC is constant
over time. The meter displays ac voltage values as rms (root mean square
readings. The rms value means the equivalent dc voltage that can produce
the same amount of heat in a resistance as the measured sinewave
voltage.
How to measure : First, press , the voltage measuring button, and then
select AC or DC by pressing In case of DC to be measured, place the
red lead on + point, and the black lead on - point, each on the voltage source .