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30 Oct 2015 To ensure maximum accuracy of a dc voltage measurement, first measure and record the ac voltage. Then measure dc voltage by selecting a dc voltage range (using the RANGE button) that is the same or higher than the ac voltage range. Some DMMs can simultaneously measure and display the ac and dc components of a signal. Set the knob to “20V” in the DC range (the DC Voltage range has a V with a straight line next to it). Multimeters are generally not autoranging. You have to set the multimeter to a range that it can measure. For example, 2V measures voltages up to 2 volts, and 20V measures voltages up to 20 volts. Set the knob to “20V” in the DC range (the DC Voltage range has a V with a straight line next to it). Multimeters are generally not autoranging. You have to set the multimeter to a range that it can measure. For example, 2V measures voltages up to 2 volts, and 20V measures voltages up to 20 volts. 24 Apr 2017 In any given circuit, it is paramount to measure AC or DC voltages, There are two types of multimeters -- analogue and digital -- and the instructions for use Set the multimeter to VDC mode to start measuring DC voltage on 17 Oct 2017 In this post we're going to show you how to use a multimeter. This post You can measure DC voltage or AC voltage. Set the mode to V with a wavy line if you're measuring AC voltage or to the V with a straight line if you're If your multimeter has a diode check function, read the manual to find out . Note that some multimeters might have AC and DC after the V and A, instead of 5 days ago If the meter has has a manual range setting dial, turn this to select AC or DC volts and pick a range to give the required accuracy. Some digital multimeters (DMMs) also include m ? . If voltage in the circuit is unknown, set the range to the highest voltage setting and set the dial on ?.