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On 06/20/2016 10:21 AM, Lennart Sorensen via talk wrote:
> On Sat, Jun 18, 2016 at 07:58:10PM -0400, Michael Galea wrote:
>> You know of course that the grid frequency is only approximately
>> 60.00 hz. For example, it was 59.97 hz on Friday at around 5 PM.
>> I have heard rumors that the generators spin the grid up to above
>> 60 hz in the early morning hours to compensate for the drift, but
>> I don't know if thats a fact.  I often see the grid at 60.01 hz,
>> in the middle of the day though.
>
> Hmm, my APC SmartUPS just reports 60.0 or 60.2Hz all the time, so
> I don't think I believe it to be accurate. :)
>
> What gismo are you using to measure that?

Wow, by pressing the right-hand button on my APC Back-UPS XS1000, I
can see lots of status information, nice!

I also have a Back-UPS XS900, and many years ago it shut down and
beeped constantly, if memory servers, and so I replaced the fan, and
put it back to work. Now the dual-batteries need to be replaced.
I have them out in the garage, but I had taken the specs to my local
W*ntronics store and they flatly stated that they would not order what
I was specifying, and I refused to buy APC-branded batteries, thinking
that I could save lots of money... I should probably pursue this and
post the info at my web site.

I recently took lots of pictures of the new memorial to Nikola Tesla
down by the Falls, I need to see about putting those online, as well.
If you haven't done so, I highly recommend reading "The Man Who
Invented The Twentieth Century : Nikola Tesla, Forgotten Genius Of
Electricity," by Robert Lomas.

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Daniel Villarreal