16-08-2021, 06:22 PM
(16-08-2021, 03:02 PM)ppppenguin Wrote: If you have a true RMS meter you can measure the voltage. Otherwise it's possible to calculate what an ordinary averaging meter would read but I really can't be bothered.
Cautious yes here!
The answer should be an emphatic Yes. But I have seen a few anomalies with so-called 'true RMS' meters, surprisingly by Fluke, where the AC ranges actually filter off any standing DC. If you stick across a 9V battery, for instance, the display flicks up and then settles at 0V. Whereas, a true-RMS meter should read 9V when connected to 9V DC.
Such a meter won't show the true RMS of a diode-rectified AC supply.
I do intend to check, and then challenge Fluke. But I need to get a round tuit.
