Understanding Technical Terms and Features

When eagerly going through the specs on multimeters (like most people like to do in their spare time😁), have you ever come across the function LPF,...

What is Polarisation Index? When testing insulation on electrical equipment, sometimes it is necessary to obtain a polarisation index (PI). Polaris...

What is Duty Cycle? Duty cycle is the ratio of how long something is turned on for, in relation to total time.  It describes the relationship betwe...

Some multimeters will give the crest factor in the specifications.  Why would we want to know anything about crest factor parameters when choosing ...

What is IP Rating? IP rating is a scale of how well a multimeter or clamp meter stands up to dust and moisture.  Most people understand that the hi...

Most multimeters come with an 'installation category' (CAT) rating.  The specification will be CAT I, CAT II, CAT III or CAT IV. The CAT rating ref...

What is accuracy on a multimeter or clamp meter? Accuracy refers to how accurate the displayed figure is compared to the actual value of the measu...

What does Count / Digits refer to on a Multimeter?  The terms Count and Digits are used interchangeably, and refer to the way a digital multimeter ...

When looking at multimeter specifications TRMS, True RMS or True Root Mean Square is often quoted.  But what is it… without the maths! AC in electr...