[Nut-upsuser] Megatec and Belkin F6H550-UPS

[Jayson Anderson]

Sorry to bother you guys with all this stuff......... I do appreciate all
the effort and info.

I'll keep my eyes posted for a repository and add a discharge recording once
the repository goes online.  I can put an ohmeter in series to measure the
applied load w/concurrent timestamps during discharge if that would help any
useful calculations.

Will the Q1 return parsing be changed in future versions to help interpret
output like mine w/special chars and such ?

If there's anything else I can do let me know; I'll be keeping an eye on
this....

Kind Regards,
Jayson



On Sat, Jun 28, 2008 at 10:52 AM, Alexander Chemeris <
alexander.chemeris at gmail.com> wrote:

> On Sat, Jun 28, 2008 at 8:02 PM, Arjen de Korte <nut+users at de-korte.org<nut%2Busers at de-korte.org>>
> wrote:
> > I understand that you're volunteering to setup such a database/wiki?
> > Please do, this has been discussed many times before, but so far nobody
> > has taken up this task... :-)
>
> I will, if I see this helpful. But first I want to fully understand
> what you're talking
> about it being useless.
>
> >> It is just matter of user-friendliness and simplicity. Just imagine -
> >> you're forcing
> >> every user of such UPS to do this experiment, spending time setting up
> >> hardware
> >> for this, capturing logs, etc, while we could minimize this useless
> >> time spending
> >> by taking values from one user and publishing them.
> >
> > For your information, although the idea behind the battery charge
> > calculation was made with the best intentions, it was flawed from the
> > start. The way the battery charge is calculated by the megatec driver is
> > better than nothing (but not much) and really can't reliably be used to
> > guesstimate the runtime remaining. We've wasted far too much time on this
> > already and I really think it is time to lay this finally to rest.
>
> What're you proposing instead?
>
> >> Jayson, please, post results of your test here. Even if developers won't
> >> go with
> >> creating database I described, your values still will be available for
> >> people through
> >> mailing list archives. :)
> >
> > I would say, don't waste your time on determining these values. For most
> > (if not all) applications, the values need to be determined on a
> > system-by-system basis to have some meaning.
> >
> > If one really needs a somewhat reliable guesstimate of the runtime
> > remaining, you should steer clear of UPSes that use the Megatec protocol,
> > since these systems are lacking some important things that are required
> to
> > make this of any use. I have written about this several times in the
> past,
> > both on the nut-user and nut-devel mailinglists.
>
> Could you point me to your posts or some other place where I can understand
> what information is required, what is missing, etc?
>
> --
> Regards,
> Alexander Chemeris.
>
> SIPez LLC.
> SIP VoIP, IM and Presence Consulting
> http://www.SIPez.com
> tel: +1 (617) 273-4000
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.alioth.debian.org/pipermail/nut-upsuser/attachments/20080628/4e234a84/attachment.htm