voltmetry
Voltmetry is the measurement of electric potential difference, known as voltage, in electrical circuits and systems. It covers methods for determining voltage magnitude, waveform, frequency, and stability, using instruments and procedures that aim for traceability to the SI volt. The term is sometimes used to describe the discipline within electrical metrology concerned with accurately quantifying voltage in both laboratory and field settings.
Historically, voltage measurement evolved from early galvanometers and electrostatic voltmeters to modern digital instruments. The volt
Instrumentation includes voltmeters, multimeters, and oscilloscopes. High-impedance, low-load voltmeters minimize circuit disturbance. Direct measurement is common
Applications span electronics manufacturing, power systems, laboratory research, and electrical installation testing. Accuracy, resolution, input impedance,
See also: voltmeter, multimeter, oscilloscope, RMS, impedance.