On Mon, Jun 20, 2016, 10:54 Daniel Villarreal via talk <talk@gtalug.org> wrote:
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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.
- -- Daniel Villarreal
Sayal might have the batteries you're looking for.