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(ET) e-meters on ETs
To those who have used an e-meter on their elec-traks, how have you
hooked up the meter? The standard meter is meant for 12 & 24 volt
battery packs, and the specifications say 40 volts max on the power
input and 50 volts max on the voltage sense input.
So... for power either need to tap the pack (3-4 batteries), or use a
dc/dc convertor, or maybe some sort of voltage regulator (which wastes a
couple of watts as heat).
For the voltage sense, the pack probably stays under 50 volts on charge
but might go a little over. Have folks not worried about it and been OK,
or used the pre-scaler (0-100 volts), or maybe a zener to clip off above
50 volts (but making voltage readings wrong if it gets that high)?
And for those who haven't seen an e-meter, it is $200 "fuel" gage that
uses a microcomputer to track battery voltage and current and then based
on battery parameters you program in it determines the approximate state
of charge.
_________
Jim Coate
1992 Chevy S10
1970's Elec-Trak
http://www.eeevee.com