What is a Digital Voltmeter?
A digital voltmeter, or DVM, is used to take highly accurate voltage measurements. These instruments measure the electrical potential difference between two conductors in a circuit. DVMs are electric voltmeters, and the preferred standard, as they offer several benefits over their analog counterparts. Voltmeters are used to measure the gain or loss of voltage between two points in a circuit. The leads are connected in parallel on each side of the circuit being tested. The positive terminal of the meter should be connected closest to the power supply. In turn, the negative terminal would be connected after the circuit being tested. The analog dial or digital display will exhibit the voltage measurement. A digital voltmeter typically consists of an analog to digital converter (A/D) with a digital display. The analog signal is converted into a digital code proportionate to the magnitude of the signal. Voltages from picovolts to megavolts are measurable, though the scale usually graduates
