If
you have some resisters around, try putting a 1000 ohm one across the meter
terminals and try again.
>>> "daveb" <daveb seanet com>
5/4/2004 7:26:20 PM >>>
really? maybe that explains why the my digital meter seems
schizophrenic at times. It wasn't damp at all when I was doing the
metering though, and I got a zero reading before hooking the pack up to the
harness. after hooking up to the harness I'd get just a little over 1v per
batt and a total of about 4.8v from all four. I don't think that could be
dust. could it?
thanks,
dave
-- Open WebMail Project (http://openwebmail.org)
---------- Original Message ----------- From: "Bob
Murcek" <rmurcek geisinger edu> To: <daveb seanet com> Cc:
<Elec-trak cosmos phy tufts edu> Sent: Mon, 03 May 2004 23:49:29 -0400
Subject: Re: (ET) PV powered ET more questions
> If you're using
a meter with really high input resistance, like a digital meter, it would take
nothing more than damp dust in the right place to get a voltage reading to the
frame.... > > >>> "RJ Kanary"
<rjkanary nauticom net> 5/3/2004 9:32:54 PM >>> >
Both the meters can go to ground, especially if
they have ever gotten > wet. It would not pass much current, until
another item goes to ground, with > the resultant arcing. >
Other prime suspects are the armature contactors, {The bushings around
> the large terminals.} , the traction motor armature terminals, and that
> perennial favorite, the Delco® lift motor. > > -----
Original Message ----- > From: "daveb" <daveb seanet com> >
To: "Chris Zach" <czach computer org>; "Markus Lorch"
<mlorch vt edu> > Cc: <Elec-trak cosmos phy tufts edu>
> Sent: Monday, May 03, 2004 9:33 PM > Subject: Re: (ET) PV
powered ET more questions > > > over the wkend I finally got
the chance to start the conversion of my E12S > to > > the
alltrax controller. I'm not nearly finished yet as I am taking this
> > opportunity to thoroughly check out the wiring for shorts, clean
things up > > etc. > > > > so far I've removed and
re-installed the rear batteries after painting the > > box and
installing the plastic battery bags from Bill G. Before I started >
I > > was getting 5v between the pack and the frame. with the
batteries cleaned > up > > in the new bags and connected
together but not to the wiring harness I > read > >
0volts. when connecting the cable that runs to the shunt I read 4.8v
> again. > > Ok I reason even though I inspected the wires in
and out of the box > something > > is grounded but where.
So I get the bright of idea of using the ohm meter > > but find
nothing! No continuity anywhere between the cable and the frame >
and > > yet I read 4.8v. How can that be? is it because my
ohm meter's battery > is > > only 9v, old and probably needs
replacing? > > > > The next time I'm at the farm I'll
disconnect the cable from the shunt and > > measure voltage to the
frame and proceed downstream > > disconnecting/checking/reconnecting
as I go. > > > > oh and I measure 15.8ohms across the
motor's field. is that within range? > I > > seem to
remember someone not long ago mentioned field resistance but I > don't
> > remember what the correct amt was. > > > > any
other ideas or comments would be greatly appreciated. > > thanks,
> > dave > > seattle > > > > -- >
> Open WebMail Project (http://openwebmail.org) > >
> > > > ---------- Original Message ----------- >
> From: Chris Zach <czach computer org> > > To: Markus Lorch
<mlorch vt edu> > > Cc: Elec-trak cosmos phy tufts edu >
> Sent: Thu, 29 Apr 2004 22:25:25 -0400 > > Subject: Re: (ET) PV
powered ET more questions > > > > > Um no. > >
> > > > If the higher capacity batteries are in series with the
low capacity > > > ones and you run the charger, what will happen?
Either you will boil > > > and overcharge the lower ones to charge
up the higher ones, or you will > > > never fully charge the higher
capacity batteries. > > > > > > The "right" solution
is a 36 volt inverter. If you're only going to use > > > a little
bit of power, then a 24 volt (better) or a 12 volt could *do*. > >
> However two of your batteries will be out of sync on charging, and >
> > you'll still wind up overcharging some batteries on the pack to get
> > > everything back in sync. > > > > >
> Get a Trace DR3624. You'll have 3,600 watts of power, and it will >
> > pull the pack down evenly. With that you should be able to run
anything. > > > Chainsaw, etc. > > > > >
> Chris > > > > > > Markus Lorch wrote: >
> > > > > >>This is so I can use Solar PV to charge my
batteries, > > > >>carry a small inverter on the ET to run a
small > > > >>commercial inverter for string trimmers and
electric > > > >>chain saws (Price Club/CostoCo had a nice
deal on > > > >>1.75kw Xantrex inverters) > > >
>>(and run the fridge, a radio and a couple of lights in > >
> >>a pinch.) (There are a LOT of trees hanging over a LOT >
> > >>of electric lines anywhere I drive, many more than >
> > >>10-15 degrees past vertical) > > > > >
> > > > > > > The previous owner of my E20 has put two
larger (higher capacity) > > > > batteries in my elec-trak.
These drive the 12V components. I also > > > > have a 300W
inverter hooked up (cheap $20) to which I connect my > > > >
small electric trimmer. It worked fine all afternoon yesterday. > >
> > > > > > Maybe you can also have two batteries be
larger? > > > > > > > > see my other post on
chargers. > > > > > > > > Markus > >
> > > > > > > > > >
_______________________________________________ > > > >
Elec-trak mailing list > > > > Elec-trak cosmos phy tufts edu
> > > > https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
> > > > > > > > > > > > >
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