Article View: sci.electronics
Article #9120TRUE RMS Voltmeters WAS: Re: Powerline voltage too high, power co working on it
From: Walter A. Koziarz
Date: Wed, 26 Dec 1990 18:56
Date: Wed, 26 Dec 1990 18:56
22 lines
1365 bytes
1365 bytes
In article <9798@as0c.sei.cmu.edu> rsd@sei.cmu.edu (Richard S D'Ippolito) writes: >Just got around to seeing this, and I'm sure you're quoting me -- anyway, >no, the typical meter (analog or digital) is average responding, RMS >equivalent reading. Peak-reading meters are very rare and specialized. > no argument here; but..... >Again, there is NO SUCH THING as "true RMS"; it's just RMS! > most likely the difficulty is semantics; *most*, typical 'AC' voltmeters do read (either via analog meter or didgits) a value REPORTED TO BE RMS. This is 'okay' as long as the INPUT IS SINUSOIDAL. A 'True RMS' meter will display a reading based upon the heating effect of the input voltage and is, therefore capable of measuring non-sinusoidal voltages and reporting an RMS reading. Walt K. >Sorry to shout! > >Rich
Technical Details
Message-ID:
<3298@nosc.NOSC.MIL>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!ucsd!nosc!halibut.nosc.mil!koziarzReferences:
<2470004@hp-vcd.HP.COM> <9798@as0c.sei.cmu.edu>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!ucsd!nosc!halibut.nosc.mil!koziarz From: koziarz@halibut.nosc.mil (Walter A. Koziarz) Newsgroups: sci.electronics Subject: TRUE RMS Voltmeters WAS: Re: Powerline voltage too high, power co working on it Message-ID: <3298@nosc.NOSC.MIL> Date: 26 Dec 90 18:56:13 GMT References: <2470004@hp-vcd.HP.COM> <9798@as0c.sei.cmu.edu> Sender: nobody@nosc.NOSC.MIL Organization: Naval Ocean Systems Center, San Diego Lines: 22