[Babase] UPS devices
Lacey Maryott Roerish
lroerish4 at gmail.com
Wed Nov 11 12:21:15 EST 2009
I think this will be perfect IF it is indeed True Sine..
http://www.staples.com/APC-Smart-UPS-SC-420VA-4-Outlet-UPS/product_601304?cmArea=SEARCH
Karl, I guess I will wait to hear from you about what Erack's input was?
Thanks
L
On Wed, Nov 11, 2009 at 12:16 PM, Niki Learn <nlearn at princeton.edu> wrote:
> Below is what we got on IT's recommendation, though it is rather more than
> Karl is saying we need for Dumbo (and pricier than the others Lacey looked
> up, though we got a discount for trading in older devices). It does
> specify
> the wave form type in the specs, so I guess some sellers will tell you and
> others won't. It seems to be a fairly new issue so some may be more on the
> ball about it than others. I am not sure if cheaper ones are available
> with
> sine wave though - I think they are more expensive to produce that way
> and/or the manufacturers are only bothering to use true sine wave in their
> higher end models at this point. First step is to see which type Dumbo
> uses. If it is not true sine wave then I think any of these cheaper models
> Lacey found that don't specify a wave form type will work.
>
> The tech (I think that's the Dell tech - it took our guy a few tries to
> figure out what the problem was in the first place because he had never
> encountered it before either) recommended the following UPS model that is
> compatible with the new Dell PCs: APC Smart-UPS 750VA USB & Serial 120V.
>
> The following link provides info on this model:
>
> http://www.apc.com/resource/include/techspec_index.cfm?base_sku=SUA750&total
> _watts=50<http://www.apc.com/resource/include/techspec_index.cfm?base_sku=SUA750&total%0A_watts=50>
>
>
> -----Original Message-----
> From: babase-bounces at eeblistserv.Princeton.EDU
> [mailto:babase-bounces at eeblistserv.Princeton.EDU] On Behalf Of Karl O.
> Pinc
> Sent: Wednesday, November 11, 2009 12:00 PM
> To: The Baboon Database Project; rh87 at duke.edu
> Subject: Re: [Babase] UPS devices
>
> On 11/11/2009 10:34:09 AM, Niki Learn wrote:
> > Just a note - we had to buy new Back UPS for our office computers a
> > few
> > months ago because it turned out that the old ones were not
> > compatible
> > with
> > the true-sine power setup in our new computers (we periodically lose
> > power
> > briefly in Guyot and all the computers were shutting off). So you
> > should
> > probably check which type of power Dumbo uses (my understanding is
> > that the
> > true sine version is the new standard because it is more energy
> > efficient)
> > and be sure the device you pick is compatible.
>
> Interesting. I've never thought about this.
>
> I could open a ticket with eracks.com and ask
> them about dumbo. (We've got a year warranty.)
> They'll probably help with the external drive
> too, although we did not get it from them.
>
> The problem is the UPS specs don't mention anything
> and the only way to find out is to hook it up to
> an oscilloscope. Maybe the best choice is to
> just try it an see if pulling the power plug on the
> ups crashes dumbo.
>
> Could we ask Axel or Sal?
>
> Ryan, do you have any suggestions?
>
>
> Karl <kop at meme.com>
> Free Software: "You don't pay back, you pay forward."
> -- Robert A. Heinlein
>
>
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--
- -
Lacey K. Maryott Roerish
Alberts Lab
Department of Biology
Duke University
ph: 919-660-7306
fax: 919-660-7293
Lacey.Maryott at duke.edu
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