On Sun, Apr 6, 2025 at 10:31 AM, Steve Hendrix wrote:
Some meters give you only the ripple when on AC, but some also include the DC
measurement (true RMS includes DC).
Hmmm, I didn't know this was ever a possibility. Can you give some examples of DVMs that have this "feature", where there's no blocking capacitor on the AC input?
This makes me wonder which reading, AC, DC, or both, would be the True RMS reading on a TRMS meter. I only have one TRMS meter and that's a Fluke 27/FM I bought from Walter at Sphere. I've probably never tried to use it to measure ripple; my default is my non-TRMS Fluke 23. I'll have to try the 27/FM next time.
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Jim Adney
Madison, WI USA
