What is the difference between RMS and Fundamental Power ?

[bdn2004]

The power monitor gives two different printouts. Which one is usually analyzed ? This is the RMS sheet.

 

[bdn2004]

And this is the fundamental. They are slightly different.

 

[bdn2004]

If it's hard to read here is the original jpeg.

 

[xnuke]

I suggest reading the manual, but I'm guessing the RMS values are true RMS values that include all harmonic content the meter is capable of reading in the calculations, and the fundamental values are the values at the fundamental frequency of the system only.

xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[catserveng]

Maybe this will help,

https://www.pdma.com/pdfs/tips/2009/10_12_09.pdf

I'd agree with XNuke's statement above, but have found some power meters have some different definitions, RDFB is the best suggestion.

MikeL.