Re: HP Power Trust UPS Info?

["Andy Whitfield" <andywhitfield2002@xxxxxxxxxxx>]

Some small UPSs are cheap because....
1) They cut back on batteries.  Eg. use a single 12v5Ah instead of
two 12v7Ah (a third of the runtime!).
2) When running on batteries they output a crude square wave instead
of a sine wave.  Square wave output can cause interference on some
equipment.
3) Minimal front panel info.  Eg. One on/off button and one LED.

And lastly they are greatly misleading on battery runtime by not
stating the load.  You'd never achieve anything like their stated
runtimes if using a standard PC + monitor.
Regards
Andy

--- In ukha_d@xxxxxxx, Dave McLaughlin <dave@v...> wrote:
> If you only want 600VA, why not try this unit from Rapid
Electronics?
>
> I use the 400VA one with my CAN bus network power supply and for
the
> price, it works a treat.
>
> *http://tinyurl.com/6nquv
>
> *Regards
> Dave...
> **
> Very funny Scotty, now beam down my clothes...!!
> ---
> http://www.v8carlton.com
> http://www.embeddedcomputer.co.uk
> ---
>
> ianh1000 wrote:
>
> > I would second these comments.
> >
> > This is just a 600VA unit which is ok for a PC I guess. It went
> > obsolete years ago, I think sales must have stopped about 7 years
> > back so I doubt the batteries are any good. If it was under
service
> > contract then the batteries are changed every 3 years ( it could
> > still work). It should give 600VA for 10-15 minand has a serial
port
> > to help auto shutdown of a server.
> >
> > Regards
> > Ian