Actually, the UPS will monitor glitches. Of course, not to the quality
of what Hal is doing.
I get the occasional glitch every few months, which the UPS absorbs. You
can hear it click. I use a double conversion UPS, so voltage and
frequency aren't an issue. [If you are going to use a UPS, double
conversion is the way to go. Noisy though.]
On 6/21/2012 1:03 AM, David J Taylor wrote:
[email protected] 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.
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