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Understanding Technical Terms and Features

Understanding Terms - Low Pass Filter

Understanding Terms - Low Pass Filter

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,...
Understanding Terms - Polarisation Index

Understanding Terms - Polarisation Index

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

Understanding Terms - Duty Cycle

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...
Understanding Terms - Crest Factor

Understanding Terms - Crest Factor

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

Understanding Terms - IP Rating

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...
Understanding Terms - Installation Category Rating

Understanding Terms - Installation Category Rating

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...
Understanding Terms - Accuracy

Understanding Terms - Accuracy

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...
Understanding Terms - Count, Range and Resolution

Understanding Terms - Count, Range and Resolution

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 ...
Understanding Terms - True RMS

Understanding Terms - True RMS

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...