Yes, there is a DC clip on ammeter available.
I believe Hioki makes the one we use at work.
Brad Rusnak
b_rusnak@telusplanet.net
1949 Chev 1/2 Ton Deluxe Cab
----- Original Message -----
From: Keith <kvdurand@mail.esc4.com>
To: <unlisted-recipients:; (no To-header on input)>
Cc: <oletrucks@autox.team.net>
Sent: Wednesday, December 22, 1999 12:54 PM
Subject: Re: [oletrucks] Voltage reducer
>
>
> > Your math is off a bit Bill
> Bill knows his math.
>
> > Power(in Watts) = Current X Voltage giving a
> > maximum power dissipation across the one Ohm
> > resistor of 12 Watts.
>
> NOPE.
>
> P is the variable we are looking for
> I (current, is a max of 12)
> E (voltage, is also a max of 12)
>
> So, P=12*12
> P=144 watts
>
> Or, use the equation that Bill used, P=I^2*R
>
> P=12^2*1, or 144 watts
>
> It was a simple mistake, I believe you put in resistance where there
should
> have been voltage or amps.
>
> These values are nowhere close to what the motor actually draws throught
the
> resistor, but using these numbers yields 144 watts, not 12. The only sure
> way to figure out what he has is to measure the voltage drop:
>
> > If Sam has access to a voltmeter he could measure
> > the voltage drop across the resistor and across
> > the fan motor with the fan running in "high" speed.
> > The drop should be 6 volts across each is the
> > resistor is the proper size.
>
> or measure the amps. Someone mentioned clamp on ammeter, I thought these
> only worked with AC. If there are some that work with DC, let me know. I
> would like to get one.
>
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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