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Don't think I've seen a reply on this so I'll give you my best
shot.
From measurements I've taken, I believe the meter (at least on
E12S) is 150A full scale. I think it's also a 100mV meter, so the shunt in the
tractor is .1V / 150A = 0.67mOhms. This squares pretty well with the resistance
of the 20" 6AWG wire used as a shunt in many models: .41Ohms/1000ft /1000/
12"/ft * 20" = 0.68mOhms
So you can use a 100mV meter movement or your DVM on the mV
scale and scale up using 100mV = 150A.
Data logging on my E12S while mowing has shown a few spikes up
near 100A, but the average is well below that.
Hope that's what you are looking for...
SteveS
E20
E12S
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