2. A tool that measures electrical voltage; for example, the potential difference between two points.
3. A device; such as, a galvanometer, that measures in volts the differences in potential between different points of an electrical circuit.
3. A device that measures voltages of either direct or alternating electric current on a scale usually graduated in volts; such as, millivolts or kilovolts.
The typical commercial or laboratory standard voltmeter currently in use probably employs an electromechanical mechanism in which current flowing through turns of wire is translated into the reading of the voltage.
Another type of voltmeter includes uses electrostatic fores and is the only voltmeter to measure voltage directly instead of by the effect of current.
2. A device that measures voltage in amplifier-rectifier circuits.
2. A voltmeter that uses the rectifying and amplifying properties of electron devices and their associated circuits to secure desired characteristics; such as, high-input impedance, wide-frequency range, crest indications, peak-to-peak indications, and so on.
It is called a "vacuum-tube voltmeter" when its electron devices are vacuum tubes.
2. A voltmeter which works by measuring the force exerted between stationary electric charges which is usually graduated in volts or kilovolts.
3. A voltmeter in which the voltage to be measured is applied between fixed and movable metal vanes.
The resulting electrostatic force deflects or turns the movable vane against the tension of a spring.
2. An instrument which measures voltage and operates as an electrothermal ammeter, using a series resistor as a multiplier.