AC Measurements

These resources focus on the basic concepts, methods, and instrumentation for ac current, voltage and frequency measurements.

AC Measurement Considerations explains how ammeters and voltmeters make ac measurements. Circuit loading, waveform distortion and other measurement issues are discussed.

AC Current Measurement Methods covers the popular methods for sensing AC current (shunt, current transformer, Hall sensor, Rogowski coil).

AC Current Instrumentation reviews some of the instruments available for fixed, portable, local and remote AC current measurements.

Line Frequency Measurements discusses the measuring methods and types of instruments that can monitor the ac mains frequency.

What is a Synchroscope? explains the operation and application of this specialized instrument.

Current Sensing for Distorted Waveforms covers various equipment options for making TRMS measurements of non-sinusoidal AC currents.