What Is a Multimeter? A multimeter is a tool that measures electrical properties like resistance, voltage, and current. It is used to test electrical components such as diodes and capacitors.

The unit of measure for the diode test is [volts, dc]. To perform a diode test using a benchtop multimeter, set the multimeter to the diode test mode by pressing the button with the diode symbol.

When you need a multimeter for testing electrical equipment around the home, it's vital to know what all those symbols around the dial mean.