Keysight U1190A Series User Manual

Also see for U1190A Series: Service guide Quick start guide

Contents

Keysight U1190A Series User Manual Manual pdf 64 page image

2 Making Measurements64 Keysight U1190A Series User’s GuideMeasuring FrequencyThis measurement function is applicable for U1192A, U1193A, and U1194Amodels only.Your clamp meter allows simultaneous monitoring of real- time voltage or currentwith frequency measurements.WARNING Never measure the frequency where the voltage or current level exceeds thespecified range.NOTE – Measuring the frequency of a signal helps detect the presence of harmoniccurrents in neutral conductors and determines whether these neutralcurrents are the result of unbalanced phases or non-linear loads.– Frequency is the number of cycles a signal completes each second.Frequency is defined as 1/Period. Period is defined as the time between themiddle threshold crossings of two consecutive, like-polarity edges, as shownin the figure below.– The clamp meter measures the frequency of a voltage or current signal bycounting the number of times the signal crosses a threshold level within aspecified period of time.Rise Time Fall Time+ Width – WidthPeriod90%50%10%