On Wed, 13 Jan 2021 08:39:11 -0500, Bob Engelhardt
wrote:

Jim - you have posted about your Bayite DC all-in-1 meter:
https://www.amazon.com/bayite-6-5-10...dp/B013PKYILS/

Do you know if it measures true RMS, or does it measure average? My
interest is mainly for full wave rectified AC, it is usually not a clean
1/2-wave sinusoid.

Thanks, Bob

For sure it will be average, but the reading will be jiggered upward
by 11.1% to match RMS on a sine wave.

(11.1% is 2*sqrt(2)/pi)

Best regards,
Spehro Pefhany