Re: (ET) Shut Type - Measuring Amperage

["steves" <ssawtelle fcc net>]

There are actually two shunts in the E20. One is a real shunt in the motor
circuit and is readily visible when you open the driver side lower panel.
The metered shunt is 20" of 6AWG cable. From a previous post:

"According to my wire table, standard annealed copper wire, 6 AWG, has a
resistance of 0.3951 ohms per 1000 feet at 68 degrees F.  So... the 20 inch
length in the tractor should have a nominal resistance of 0.0006585 ohms."

As I recall, the meter is a 100mV so that is 150A full scale. That sounds
reasonable.

BTW I've added a hall effect probe on the power cable going to the
disconnect which is read by my "ET-meter". Seems to work well. Its
bidirectional too, so I can read charging current.

- Steve







----- Original Message ----- 
From: "Markus Lorch" <mlorch vt edu>
To: <elec-trak cosmos phy tufts edu>
Sent: Wednesday, June 30, 2004 9:25 AM
Subject: (ET) Shut Type - Measuring Amperage


> Hi all,
>
> I would like to measure the amperage my E20 draws with a
> digital multimeter (I may have a bad/misaligned power meter and want
> to verify that assumption).
>
> Can somebody tell me what type of shunt (50 mV?) we have in the
> E20s (my serial: 26AE20CC)?
>
> Thanks
>
> Markus
>
>
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