Understanding AC Sine Waves and the Value of True RMS Test Instruments

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Mitch explains the structure and numerical values of an AC sine wave and demonstrates measurements on altered sine waves using True RMS and averaging test instruments.
Check out the Taking Measure website and Mitch's book at takingmeasure.net - www.takingmeasure.net/
Mitch's Beginner's Guide to Electrical Test Instruments - 3+ hours of step-by-step electrical circuit and test instrument basics for students and novices is available to review and purchase through Taking Measures' Udemy link - www.udemy.com/course/the-begi...

Опубликовано:

27 май 2023

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Комментарии : 6

@majorpygge-phartt2643 Год назад

Hi from England, UK. I've got a true RMS meter which is essential for accurate readings with non sinusoidal waveforms, which the more basic meters are not made for, and they usually give miles less accurate readings for other waveforms, some of which are non symmetrical and have very different crest factors, like the waveform that feeds the tube heater on later generations of older CRT type TV set, where the voltage should usually be 6.3 volts but it only shows that voltage on a true RMS meter, the more basic type of meter usually shows only about 4.8 volts which is inaccurate.

@takingmeasure Год назад

I need to address crest factor in another video. For some waveforms, crest factor capabilities make a lot of difference. The narrow "shark fin" from an incandescent dimmer is a good example. Thank you for sharing your thoughts.

@kabandajamir9844 Год назад

So nice thanks sir

@takingmeasure Год назад

Thank you for watching. I appreciate the comment.

@waynegram8907 Год назад

MITCH, When would a technician want to measure the average voltage? I'm not sure when to use the average voltage for what type of application and circuit would you want to measure the averaging of the voltage

@takingmeasure Год назад

A fair number less expensive DMMs you can purchase are "average responding" instruments. They work fine on pure waveforms and will offer accurate voltage and current measurements. They are challenged when confronted with altered or misshapen waveforms. I always recommend that technicians use True RMS instruments for accuracy.