nuckollsr(at)cox.net
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 Posted: Tue Mar 06, 2007 6:30 am Post subject: Not all chargers . . . |
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Was looking for some tools in the mess-shop yestereday
and ran across a Schumacher "smart charger" still in the
box. I'd purchased it at WallyWorld last year some time
with the intent of seeing how it behaved compared with their
lesser products.
I had a 32AH Panasonic RG battery in a partial state of
recharge in the electronics shop. I replaced the 1A Battery
Minder with the 12A Schumacher smart charger and produced
the following performance curve.
http://www.aeroelectric.com/Pictures/Curves/schumacher_5.jpg
Here we see that the protocol boosted the battery to the
top-off phase pretty quickly. 12A recharge would be expected
to have a steeper slope than the 1A charger. The battery
was held in top-off for a little over 3 hours before
dropping to a sustaining voltage of 13.5 volts.
The 'noise' on the voltage traces shows up only after
the recharge current drops below the boost level and
continues after the voltage is allowed to drop to sustaining
levels. I presume this is the effect of some form of
'desulfating' activity.
Bob . . .
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( IF one aspires to be "world class", )
( what ever you do must be exercised )
( EVERY day . . . )
( R. L. Nuckolls III )
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