Text 14184, 85 rader
Skriven 2006-11-20 11:16:56 av RobertB. (1:379/45)
  Kommentar till text 14138 av mike (1:379/45)
Ärende: Re: UPS weirdness
=========================
From: "RobertB." <rb28@nyu.edu>

In article <sad1m2dpeqvuc3rjjosnust3gbo2isrrdl@4ax.com>,
 mike <mike@barkto.com> wrote:

> On Sun, 19 Nov 2006 13:48:41 -0500, "RobertB." <rb28@nyu.edu> wrote:
>
> [trimmed]
>
> >In article <li6vl2pscnabaqeokgpjsaijg6v7n26lm9@4ax.com>,
> > mike <mike@barkto.com> wrote:
> >
>
> >> Normal component tolerances will account for that level of difference.
> >> That's not a critical set-point, so they're not going to use high-spec
> >> components.
> >
> >Hmm. I thought these SmartUPS were high-tech devices?
>
> High-tech does not necessarily mean that high-spec (i.e.,
> high-precision) components are used in every part of the device.

I see. Well, they should be considering what they cost. The SmartUPS are not
cheap.


> It varies.   Within my house there is no load balancing.

What about from the mains to the house? The incoming voltage?


> >Well, it's a residential building and god knows what they did with those
> >cables or if they even hooked them all up. They banged holes in the
> >walls in the hallway and ran the cable into something, but my electrical
> >power was never shut off. Nor was the building power, so I have no idea
> >what they did. It's possible they just dropped them in the wall planning
> >to connect them later to the individual breaker boxes in the apartments.
>
> Or maybe they connected others' devices to new wiring, reducing the load
> on the circuits you are on.  I don't know.  I'm just guessing at what
> might have been done.  Without being there my guess is pretty random.

I understand. I'm not sure myself what they did. I'm not even sure they've
finished.

> "Old analog voltmeter"  was that meter ever calibrated?   Have you
> checked it against a calibrated meter?

Nope and nope.
>
> Or maybe the meter is working fine, and the APC UPS is flaking out.

Could be, although it's hardly been used much since I got it (hasn't been on
constantly). And there's never been much of a load on it.


> Aggressive upgrade policy (though I would be reluctant to call it an
> upgrade...) comes from marketing dollars.

Oh, they have plenty of money. APC stock is doing pretty well when I last
looked.


> I wouldn't use an APC UPS for any piece of equipment I care about.
> Obviously, many others differ from that opinion.  What can I say?

Can't remember why I decided on APC. Maybe because of the sine-wave output?
It's been a while.


> Not that expensive.  They work well.  I buy 'em through
> www.provantage.com

Thanks. I'd be looking for one that provides voltage correction (boost and
trim) as well as sine-wave output. The voltage correction is as important here
as the back up capability.

.../...

> I use NUT software.   It's agnostic to brands.

Works with OS X?

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