amazing, i can't fathom ever using this function but was disappointed there was nothing in the directions about rms and mean output modes either. took a day of video reviews and finally an email to the vendor to understand how to operate in rms. once it displays rms output let the button go and your in rms. if you try to check what mode your in you will change back to mean output and have to hold long time again to display rms output.
Originally Posted by Sad Society