[time-nuts] Power glitch

[gary]

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:
> david-taylor at 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.
>
>