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RE: (ET) ET FAQ - Call for Entries/Call to Arms!

Please include the following attachments in some form.

These Voltage/Current meter questions keep coming up, I suspect 
because so many people have bad or intermittent gauges.

BTW, according to the GE meter, maximum charging voltage is 45 to 52 V!
52 V will boil off the batteries, and 45 is 7.5V each!  Yet that is what 
the meter values are.

Another nice table (If anyone cares to make it) is clip-on current values 
corresponding to the needle values.  Or convert the shunt currents on the 
second attachment to real current values.

Larry Elie

PS:  In addition, a list of not only who lives where, but even who has a 
working 
what might be nice.  It is nice to know who has a working trimmer, tiller, 
or 
whatever because they probably know how it works.


-----Original Message-----
From: Don Barry [mailto:Don Barry kmtc com]
Sent: Wednesday, June 27, 2001 9:35 PM
To: <Elec-trak
Subject: (ET) ET FAQ - Call for Entries/Call to Arms!


Folks,

I've installed and published a FAQ generating program on 
http://www.elec-trak.org , under the FAQs section.  
The direct URL to the FAQ is 
http://www.elec-trak.org/cgi-bin/faq/index.html

Now all we need is some good content. Please give it a look. 
I'm asking everyone to take the time and come up with some good Questions 
and Answers. The FAQ categories aren't fixed, so we can change those as 
well.

Over the past two years I've been on the elec-trak maillist, we've all at 
one time or another wanted a FAQ, so here it is! Us, as a group, 
maintaining this FAQ will be critical in promoting the future of our 
wonderful ET's. 

If you have things to add, let me know. You can email them directly to me 
at don barry kmtc com

If you're REALLY computer literate, have a lot of things to add, and 
willing to devote some time to this, I will distribute (frugally) the 
password to the FAQ's admin program so you can enter in FAQs directly 
(which my wife will greatly appreciate).

Humbly yours,

Don


Don Barry
Infrastructure Manager, IT
Kirby Corporation
E-Mail: don barry kmtc com
Phone: 713-435-1032
Fax: 713-435-1070
--- Begin Message --- 
To Larry, David, and others,
On gauge markngs,
    I found a good loose "fuel level" gauge, connected it to a variable
voltage power supply, and checked the needle position against voltage input
using a Fluke 2000A digital multi meter.  There was some range in the
readings due more to parallax error than instrument error, but here are the
results I got:
1.  Needle just moves = 20 to 22 VDC.
2.  Bottom of red = 27 to 28 VDC.
3.  Top of red = bottom of green = "E" = 35 to 35 VDC.
4.  Top of green = bottom of white = "F" = 45 to 46 VDC.
Note:  Green zone is the normal operating zone.
5.  Top of white = bottom of upper red = 52 VDC.
Note:  White zone is the charge zone.
6.  Top or upper red = 54 VDC.
    Please remember that this is one gauge; other gauges may read slightly
differently.  I would like to have had several gauges to do this test with.
I would have preferred even more to have the official GE documentation, but
as far as I can tell, this info was not in any of the dealer service
manuals.

    Steve Naugler

----- Original Message -----
From: David Roden <roden ald net>
To: <elec-trak cosmos5 phy tufts edu>
Sent: Wednesday, April 07, 1999 2:49 AM
Subject: Re: (ET) Gauge points...


> From:           Larry Elie <lelie ford com>
>
> >  Does anyone know what
> > values are marked on the gauges, or what taper was used?  I know, I
could
> > just go and buy some, but I was thinking about digital ones, or even
> > combined, and would like to know the values that were marked for
> > reference.
>
> I'd like to know this too.  If you know, please post to the list. Thanks.
>
> ===================================================================
>                 David Roden          THE VIRTUAL PD
>      Services for radio broadcasters targeting educated adults
>  Programming   Air talent development   Research   Classical music
> ===================================================================
>

--- End Message ---
--- Begin Message --- 
Larry and others...
On gauges...

    The charge level gauge is linear, not logarithmic.  It is just that the
zero point of the gauge is some voltage other than 0 volts, probably around
28 V.  The full sclae is likely around 42 V.  I tried to measure the 
various
voltage points on a gauge, but the only loose gauge I found was open
circuit.  If I find a good loose gauge, I'll post the voltage vs. needle
displacement data.
    The power gauge is actually a millivolt gauge measuring the voltage 
drop
across a shunt.  I took a loose but poor condition gauge and measured its
needle displacement vs. mV input.  Here is the data on that gauge:
1.  Bottom of green/0% = 0 mV.
2.  Top of green/bottom of yellow = 36 mV
3.  Top of yellow/bottom of red = 64 mV
4.  Top of red/100% = 90 mV
    This data is suspect because of the gauge condition, but within the
expected range.  (industrial shunts are usually rated 50 mV per full range,
and their mating meters are usually 50 mV at 2/3 scale and 75 mV at full
scale.
    Sorry this data is so poor.  My official factory shop manuals don't 
give
gauge or shunt data.  If I find better gauges I'll post data from them.

Steve Naugler

----- Original Message -----
From: Larry Elie <lelie ford com>
To: Elec-trak <elec-trak cosmos5 phy tufts edu>
Sent: Tuesday, April 06, 1999 3:14 PM
Subject: (ET) Gauge points...


> I have a minor problem.  It bugs me because it would have been SO easy to
have taken
> care of it before, but, well, I didn't so here goes.
>
> Water got into the movements of both my current (load) and voltage (fuel)
gauges over
> winter.  Now they don't read anything close to right.  It isn't hard to
find a volt or amp
> meter to replace the bad ones, just to know where the "low", "normal" and
"high" etc. points are.
> I have measured both voltage and current on the machine before, but I
never bothered to write
> down the marked gauge points for either voltage or current.  I assume the
voltage is a
> logarithmic taper (a small change in voltage at the top appears like a
large part of the scale
> of the meter), but don't even know if the current was a linear taper or
not.  Does anyone
> know what values are marked on the gauges, or what taper was used?  I
know, I could
> just go and buy some, but I was thinking about digital ones, or even
combined, and would
> like to know the values that were marked for reference.
>
> Larry Elie
>
> PS, this is E-12, but any of the 6 battery machines should be the same.
>

--- End Message ---