Electrical Testing Instruments

Use the icons on the right to switch between category overview and filtered views.


The basic measurement of electrical power depends on voltage, current and time, all of which are relatively simple to measure, using basic devices such as a voltmeter, ammeter and clock, or a multimeter. A power supply, however, has many more features, all of which influence the nature and quality of the supply, including wave-form, phase/phase shift and harmonics. Power test instruments can provide in-depth measurement, analysis and recording of all relevant data and have a wide range of uses, from simply monitoring domestic electricity usage to checking the quality of electrical power-producing equipment. Power test instruments are available for single and three-phase supplies and may be used to identify inefficiencies and waste, or possibly to examine the nature of the supply during a motor start-up. Checking waveform features such as TRMS can, of course, be done using an oscilloscope, but advanced power analysers have greater powers of analysis and data-logging capabilities, along with extensive connectivity options. On a much simpler scale, some basic instruments may simply need plugging into a power socket.