How to measure ac voltage. Some digital multimeters ( DMMs) also include m ṽ. If voltage in the circuit is unknown, set the range to the highest voltage setting and set the dial on ṽ. Note: Most multimeters power up in Autorange mode. This automatically selects a measurement range based on voltage. If uncertain of which to choose, start with DC V Symbol , which handles higher voltage. First insert the black probe into the COM jack.
Set the multimeter to “2V” in the DC (direct current) range. Almost all portable electronics use direct current), not alternating current. Alternating Current (AC) vs. Well, we have something for you. Professional supervision advised.
A digital multimeter or DMM is a useful instrument for measuring voltage , current and resistance, and some meters have a facility for testing transistors and capacitors. You can also use it for checking continuity of wires and fuses. If you like to DIY, do car maintenance or troubleshoot electronic or electrical . When making a voltage measurement with a multimeter , the first step is to switch the multimeter to the voltage ranges. It is best to select a range higher than the expected voltage so that there is no chance of the meter being overloaded and damaged.
In addition to this check that the test leads are plugged into the correct.