Today's Message Index:
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1. 03:38 PM - Deceptive Voltage? ()
2. 04:44 PM - Another battery maintainer/charger question (edleg)
3. 05:19 PM - Re: Another battery maintainer/charger question (Neal George)
Message 1
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| Subject: | Deceptive Voltage? |
7/11/2010
Hello Bob Nuckolls and other Electrical Gurus,
Suppose you ran your battery down by spinning your first time to be started
O-540 Lycoming engine with the starter in order to preoil the engine in your
nearly finished RV-10. And maybe you did some other things that ran the
battery down.
Then you connected your small amperage output battery charger to the battery
and you attempted to start the Shower of Sparks equipped engine without
success. The engine was cranked OK, but the starting vibrator just was not
putting out.
A check of the system voltage in appropriate points with a separate volt
meter while cranking the engine showed 13 plus volts.
Is it possible that the voltage being seen was in fact the voltage being put
out by the battery charger as it attempted to recharge the run down battery,
but the amperage being put out by the run down battery and battery charger
together just was not enough current flow to run the starting vibrator as
well as crank the engine?
'OC' Baker Says: "The best investment we can make is the time and effort to
gather and understand knowledge."
Message 2
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| Subject: | Another battery maintainer/charger question |
This subject is off topic of building/running airplanes, but it is still an interesting
(to me, anyways) question/subject. One of my hobbies that gets in the
way of aircraft building is my long time ham radio interests.
I recently obtained a new RV/Marine deep cycle battery to provide emergency 12vdc
power for my vhf/uhf station and hf station on low power. I bought a nice battery
box to put the thing in (a rather heavy battery -- "105 Ahr"). Mounted
a small dc-to-ac inverter on the lid along with some 12vdc outlets and also a
new Schumacher SE-1-12s (1.5 amp) maintainer/charger.
Everything works fairly well except for two troubling things:
1. the maintainer/charger is very loud, even in the maintainer mode -- actually
louder than my other two regular 6/2 amp and 10/2 amp battery chargers.
2. the "float" voltage that is maintained is at 12.96 vdc as measured by two different
digital (fluke brand) volt meters. Seems a little bit low when reading
the other posts here.
So... Bob and the other electron experts: is there a relatively (physically) small
maintainer/charger that doesn't always sound like a loud battery charger (oxymoron???)
when in the maintainer mode, and is the float voltage high enough?
Thanks,
-Ed-
NX6ED
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=304520#304520
Message 3
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| Subject: | Another battery maintainer/charger question |
Ed -
My little Schumacher 1562 1.5-amp charger/maintainer is silent - at least,
if it makes any noise, I've never noticed it, even in the wee hours with the
house & shop quiet.
Neal
N8ZG
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of edleg
Everything works fairly well except for two troubling things:
1. the maintainer/charger is very loud, even in the maintainer mode --
actually louder than my other two regular 6/2 amp and 10/2 amp battery
chargers.
2. the "float" voltage that is maintained is at 12.96 vdc as measured by two
different digital (fluke brand) volt meters. Seems a little bit low when
reading the other posts here.
So... Bob and the other electron experts: is there a relatively (physically)
small maintainer/charger that doesn't always sound like a loud battery
charger (oxymoron???) when in the maintainer mode, and is the float voltage
high enough?
Thanks,
-Ed-
NX6ED
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