[no subject]

> At 20:20 7/22/2004 -0400, you wrote:
> >Greetings,
> >I have several power backup units and they work ok with pc's. I also
> >have a digital audio recorder,
> >for which they do not work. It appears that the response time is too
> >slow. All of the ones I have
> >checked have a response time of 150 ms (or better they say), which is
> >almost 9 cycles.
> >Is anybody aware of faster ones or a way around this problem? The
> >recorder takes only 30 Watts,
> >so that should not be a problem. TIA.
> >Cor van Dijk.
> >
> >_______________________________________________
> >Ale mailing list
> >Ale at ale.org
&gt; &gt;<a  rel="nofollow" href="http://www.ale.org/mailman/listinfo/ale";>http://www.ale.org/mailman/listinfo/ale</a>
&gt;
&gt; Cor,
&gt;
&gt; There are different kinds of UPS's. See 02.04.3 of the UPS FAQ.
&gt;
&gt; <a  rel="nofollow" href="http://www.non.com/news.answers/UPS-faq.html";>http://www.non.com/news.answers/UPS-faq.html</a>
&gt;
&gt; 3. What I call &quot;true&quot; UPS systems, those supplies that continuously operate
&gt; from an inverter. Obviously, there is no switchover time, and these
&gt; supplies generally provide the best isolation from power line problems. The
&gt; disadvantages to these devices are increased cost, increased power
&gt; consumption, and increased heat generation. Despite the fact that the
&gt; inverter in a &quot;true&quot; UPS is always on, the reliability of such units does
&gt; not seem to be affected. In fact, we have seen more failures in cheaper SPS
&gt; units. [ Note, though, that given the same quality inverter, you'd expect
&gt; the one that runs least to last longest. ]
&gt;
&gt; keith
&gt;
&gt; -------------
&gt;
&gt; Keith R. Watson                        GTRI/ITD
&gt; Systems Support Specialist III         Georgia Tech Research Institute
&gt; keith.watson at gtri.gatech.edu           Atlanta, GA  30332-0816
&gt; 404-894-0836
&gt;
&gt; _______________________________________________
&gt; Ale mailing list
&gt; Ale at ale.org
&gt; <a  rel="nofollow" href="http://www.ale.org/mailman/listinfo/ale";>http://www.ale.org/mailman/listinfo/ale</a>

Thanks Keith,
There appears to be a whole lot more to a UPS than I thought. The search for a
&quot;true UPS&quot; is on. In case you happen to know where I can get one I would
appreciate to hear from you. The vendor list at the end of the FAQ is ten
years old.
Thanks again, Cor van Dijk


</pre>
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<li><strong><a name="00686" href="msg00686.html">[ale] OT: slow back-UPS</a></strong>
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