Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!emory!rsiatl!larry
From: larry@Dixie.Com (Larry Kahhan)
Newsgroups: sci.electronics
Subject: Re: Powerline voltage too high, power co working on it
Message-ID: <5402@rsiatl.Dixie.Com>
Date: 20 Dec 90 22:17:51 GMT
References: <1990Dec20.181242.11076@news.cs.indiana.edu>
Reply-To: larry@rsiatl.UUCP (Larry Kahhan)
Organization: Rapid Deployment Systems (making go-fast things and things that-go fast)
Lines: 14

>rsd@sei.cmu.edu (Richard S D'Ippolito) writes:
>
>>... Again, there is NO SUCH THING as "true RMS"; it's just RMS! ...
>

Not so! Early AC voltmeters used a technique to measure the RMS values
of sinusoidal waveforms by a simple calibration technique. When AC
voltmeters came along which could determine the RMS value of an 
arbitrary waveform (using any one of a number of techniques) these
meters were called "true RMS" to distinguish them from ealier RMS
meters. However, there is only one real definition of RMS, as
Richard points out.

Larry Kahhan - NRA, NRA-ILA, CSG, GSSA , & GOA