voltage

[Ric Moore]

On Fri, 2010-09-17 at 10:06 +0800, Christopher Chan wrote:
> On Friday, September 17, 2010 10:00 AM, Li Li wrote:
> > On Fri, 2010-09-17 at 08:35 +0800, Christopher Chan wrote:
> >> On Friday, September 17, 2010 07:57 AM, Vic Main wrote:
> >>> At 04:26 PM 09/16/10, you wrote:
> >>>> On Friday, September 17, 2010 12:24 AM, Johnny Rosenberg wrote:
> >>>>> Den 2010-09-16 06:35:15 skrev terry l<xtlynne at charter.net>:
> >>>>>
> >>>>>> 311 volts is 220, peak to peak
> >>>>>>
> >>>>>
> >>>>> Yes, it is. So did someone ask this or why did you write that?
> >>>>>
> >>>>
> >>>> Terry has this knack of not responding in the thread concerned. My
> >>>> digital multimeter reports somewhere around 311V but I am supposed to be
> >>>> in a 220V environment. Maybe the battery is dead and so certain
> >>>> functions are not available and so I get the 3xxV figures.
> >>> Kind of off topic, but not all digital multi meters read AC RMS
> >>> voltages correctly. The more expensive one's do i.e. Fluke, HP,
> >>> Philips, Tektronix, etc.
> >>>
> >>
> >> The thing is, it did read 2xx before so unless I had major problems
> >> before...
> >>
> > As I pointed out to you last week:  311 x 0.707 = ~220.  You're reading
> > peak.  Maybe you're not using the meter correctly, or maybe it stopped
> > being a true RMS meter.  If the mains voltage were that much higher than
> > it should be, all kinds of things would be smoking.
> >
> 
> Hence the part about the battery in the thing. Or maybe I am not using 
> it properly. One day I am going to get zapped.

Heh, I got hit daily with 220, and I'm OK. :) Ric
<ZOT!> 

-- 
My father, Victor Moore (Vic) used to say:
"There are two Great Sins in the world...
..the Sin of Ignorance, and the Sin of Stupidity.
Only the former may be overcome." R.I.P. Dad.
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