F6C800-UNV Belkin UPS?
Les
hlhowell at pacbell.net
Sun Aug 12 02:09:39 UTC 2007
On Sat, 2007-08-11 at 20:23 -0400, Bob Goodwin wrote:
> Tim wrote:
> > On Sat, 2007-08-11 at 16:46 -0400, Bob Goodwin wrote:
> >
> >> I installed two new SLA batteries two days ago and judging from the
> >> voltage across the terminals it was charging. I would have to remove
> >> the case to measure battery voltage which ought to be near 27 volts by
> >> this time I would think.
> >>
> >
> > My preference for checking that batteries are charging is measuring the
> > current going to them, rather than voltage. But that's not always
> > practical, heavy charge can be quite a few amps, and it may drop down to
> > just a few milliamps when (almost) done. That's quite a range to cover
> > with just one meter.
> >
> >
> Yes, if I have to kludge together a charger for a drill battery or some
> such I use a variable bench supply and measure the drop across a series
> resistor and tweak things periodically. This thing doesn't lend itself
> to measuring the current and it would be out of range for my old Fluke.
>
> I took the cover off and checked, it was up to 26.9 volts and dropped
> back to 24.6 after a bit connected to a 21" tv/cctv deal I have to help
> the feeble of eye read text. It's good, and I found an item in the
> configuration I could set to make it ignore the [false] low battery charge.
>
> I want to try "nut" also and see if it works any better.
>
>
Gel cells require a different charging potential and charge currents
than immersion type (conventional lead acid) storage batteries. Most
systems for chargers have a strap of some kind to set for
"flooded" (conventional) or "gel" for gell cells.
Regards,
Les H
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