Digital Multimeter

A digital multimeter (DMM) is a device that can measure voltage, current, and resistance. Unlike an oscilloscope, which can measure and display a varying voltage vs. time, a multimeter can only display one value at a time. Therefore, multimeters can only be used to measure constant values. The following quantities can be measured.

• DC Voltage
• AC Voltage (RMS)
• DC Current
• AC Current (RMS)
• Resistance
• Capacitance

In addition, a multimeter can be used for continuity and diode testing.

The front panel of a multimeter is shown below. The screen displays the value of the measurement, and options associated with the measurement can be adjusted with the buttons below the screen. The buttons to the right of the screen are used to adjust the measurement type. The functions in blue above these buttons can be accessed by clicking the *[Shift]* button. On the right side of the DMM is where you connect probes.