I can tell you also from firsthand experience that this is a very real
problem. Our room UPSes and the 5.5Kva unit in our 997 have been battling
for months, and the 5.5 keeps losing. After being replaced 3 times, it's
currently DOA again and we're now trying to get custom filters
installed/developed to prevent the harmonics problems.

If you visit the Interex/HPWorld site under the area to pre-submit questions
for the roundtables, you might notice that I submitted an issue on the
unsatisfactory-state of UPS support on the 3000s... feel free to chime in.
Hope to also bring it up in the high-availability SIG meeting at HPWorld...

 -Chris Bartram

                -----Original Message-----
                From:   Randall Davis [mailto:[log in to unmask]]
                Sent:   Tuesday, September 05, 2000 2:04 PM
                To:     [log in to unmask]
                Subject:        Re: [HP3000-L] UPS Monitor

                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