RE: (ET) performance logging

["Hazen, Dwight L" <hazen indiana edu>]

I have had an E meter on my ET for about 4 years now. Works great!

  Dwight 

Dwight L. Hazen, Indiana University, UITS 
Bloomington, In. 47408-7378 Phone 812-855-5367 hazen indiana edu
http://php.ucs.indiana.edu/~hazen/ Ham Radio wb9tlh arrl net
IP Phone 317.278.4014   Change is inevitable except from a vending
machine.


-----Original Message-----
From: Christopher Zach [mailto:czach computer org] 
Sent: Friday, July 26, 2002 8:03 AM
To: SteveS; elec-trak cosmos phy tufts edu
Subject: Re: (ET) performance logging

That is neat. I have just started using my CEC E-meter on the electirc
car,
and it's amazing to watch the voltage and current go up and down. The
neatest part is that you can see when you're simply being inefficient.
For
exaample: pouring power on while climbing a hill. You're just wasting
200amps (and dropping the voltage thru the floor) with no net effect.

Was about to post for comments on putting an E-Meter in an Elec-trak,
but
they cost $200 each. $30 plus a little solder is much more reasonable...

Thanks for working on this.
Chris

----- Original Message -----
From: "SteveS" <ssawtelle fcc net>
To: <elec-trak cosmos phy tufts edu>
Sent: Friday, July 26, 2002 7:03 AM
Subject: (ET) performance logging


Well, I finally somewhat completed a project for the ET. I built up a
little
data logger to log voltage and current in the ET. I tried it out last
evening and the data is pretty interesting. One can easily see each
hill, up
and down, mower on/off in the current graph. Voltage, tho' was most
interesting as it was in the 36V range. Then I noticed the data while
the
charger was on - voltage was only about 38V! I thought I seemed to be
low on
power, even after a charge. So time to troubleshoot the charger - where
is
that manual?.....


SteveS
E12S