[GreenKeys] RE; UPS overview and tech cosiderations

[eugene at hertzmail.com]

An only mildly interesting story from me.

I have a small 1U file server and also have a postal telegraph
"synchronous" clock. Darn clock stops the moment you even look at the
electrical service! So I bought a cheapo ups to keep from having to
reset it all the time. I also plugged into it my heathkit GC-1107 (I
think that's the model) so I don't get a flashing 12:00 every time I
lose power.

So I did a test. What I found was that when this cheapo ups was "on
battery" for 10 minutes, my heathkit clock would advance 20 by minutes!
I finally deduced that this must be because of the waveform of the ups
being probably very square! The heathkit was probably seeing 120Hz in
stead of 60Hz!

So now I own a nice APC that works great. The other benefit is with a
serial connection, my server will automatically shut down properly. I
can also get a graphical chart of the wall plate voltage over a period
of a day (maybe more I forget). This is by using the "powerchute
business addition" software. 

So, just about 1hour ago, my lights flashed. When upstairs to see how
everything survived. Server was A-OK and not rebuilding the RAID like it
would do. Heathkit was great. Darn Postal Telegraph clock still stopped!

Regards
Eugene

-----Original Message-----
From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of KC0NNC at aol.com
Sent: Friday, October 19, 2007 10:07 AM
To: nerd at verizon.net
Cc: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] RE; UPS overview and tech cosiderations

Damn good advise Peter, I have printed your email.  In order to preserve
off 
line (yes, paper still works best for me).
 
I am glad to meet one of the engineers responsible for these advanced 
capability UPS's and the considerations that preceded their design.
 
I am a member of the IEEE, and VP of our local engineering group. Were
you a 
local to the area, I would now try and get you to accept an invitation
to give 
us a talk along the lines of your short paper.
 
By the way.... just about every point you made i was going to also
mention, 
so i am glad you took the time to do it (thereby saving my typing
finger)
 
I wondered what the "name" was for the sine units...  
 
I sort of favor the more technical units as well... ones indicating
battery 
condition, charging rate etc.
 
73's
 


Harvey E. Smith
2020 Baculite Mesa Road
Pueblo, CO., 81001-2456
719 406 9735

fka WA0BBG
nka KC0NNC

HarveyEsmith at aol.com

KC0NNC at aol.com


73's



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