Randall Davis wrote:

> I don't know if this is applicable to your situation, but if you have a
> room covering UPS, then you can get into a situation where the room UPS and
> the HP3000 UPS can interfere with each other (harmonics?).  In some cases,
> this will cause the UPS on the HP3000 to alternate between battery power
> and A/C power.  Eventually, the battery on the HP UPS will deteriorate to
> the point where it can no longer supply adequate power.  I saw this
> situation recently, and was able to remove the HP UPS before it caused an
> outage.
>
> Randall Davis
> Director, Technical Operations
> KBkids.com
> 303.226.6210
>
>                     Jim Phillips
>                     <jim_phillips@THERM        To:     [log in to unmask]
>                     OLINK.COM>                 cc:
>                     Sent by: HP-3000           Subject:     Re: [HP3000-L] UPS Monitor
>                     Systems Discussion
>                     <[log in to unmask]
>                     .EDU>
>
>                     09/05/2000 09:12 AM
>                     Please respond to
>                     Jim Phillips
>
> Andrew Cartledge <[log in to unmask]> asks:
>
> > I am trying to understand how a UPS and the UPS Monitor works. I have a
> > situation where the lights flicker the UPS puts a message along the lines
> > of Ldev22 reports loss of AC input, puts out low battery warnings then 15
> > minutes later halts the system. Rest of the building still has power.
> >
> > Is the monitor configurable. Are there any docs about it anywhere.
> > Basically how does/should it work, or in this case not.
>
> I, also, would be interested in these items.  If anyone has any info,
> please
> post to the list or copy me as well.  HP doesn't seem to be too interested
> in the UPS's anymore, having sloughed off the support to a third-party...
>
> Jim Phillips                            Manager of Information Systems
> E-Mail: [log in to unmask]     Therm-O-Link, Inc.
> Phone: (330) 527-2124                   P. O. Box 285
>   Fax: (330) 527-2123                   10513 Freedom Street
>   Web: http://www.tolwire.com  Garrettsville, Ohio  44231

I concur with Randall,  we have a 7 kva ups that supplies most of our computer room we
then added a second HP 3 kva unit and was told by the electrician that you can't put 2 ups
systems on the same circuit because of "harmonics".


--
Larry Barnes
Director of I.T.
Mitek Corp.
602-438-4545 x1366
Phoenix, AZ 85040

Check Us Out !
http://www.mitekcorp.com