david-tay...@blueyonder.co.uk said:
Does the glitch mean you had a 16-second outage or what? I'm not clear.
Yes.
For the previous year or so, my local power has been very good. I've seen
occasional off-by-one counts in both directions but nothing more interesting
than that.
I haven't tracked single-cycle steps down to either the raw power or my
collection setup. Here are examples:
http://www.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2012-Jan-17-a-drop.p
ng
http://www.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2012-Jan-26-a-pick.p
ng
Note that the vertical scale is cycles rather than seconds.
I also see occasional cases where it looks like a generator is dropping off
line and it takes a while for the rest of the system to catch up:
http://www.megapathdsl.net/~hmurray/time-nuts/60Hz/60Hz-2012-Mar-30-a-dip.pn
g
One of these days, I'll capture the audio.
BTW: although the URLs have a .PNG file extension, the images come across
in
.GIF format. Are you converting on-the-fly?
Thanks for the heads-up. It was just a fatfinger. They should be fixed
now.
--
=======================================
Thanks for that, Hal. I would set up some monitoring myself except that I
don't have a UPS so even a 16-second outage would not be recorded. Could
use a portable PC, I suppose... We have perhaps one outage every two years
on average, and they last for at least 30 minutes, so I might need a
generator as well as a UPS! Not worth it - I don't mind being dragged away
from the desk for a while - might catch up with read a magazine or two.
Fascinating plots - thanks for sharing.
Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
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