Unless you take measurements the meter resistance is an unknown. The
Handbooks and internet both describe the process.
After that the math works.
Carl
KM1H
----- Original Message -----
From: "Robert Perdue" <kc0hfl@cox.net>
To: <Amps@contesting.com>
Sent: Friday, May 29, 2009 12:50 PM
Subject: [Amps] Meter shunt
>I have a Weston 301 meter 0-100 ma scaled meter and wish to make a shunt
>to
> use for screen current in my 4-1000 amp. The screen voltage is 300V I
> have
> used the formula RS=RM/(IS/IM) Okay here is what I used RM = 3ohms meter
> resistance IM meter current for full scale =2ma I am thinking I need to
> shunt 98ma for full scale
>
> I am just not sure of my math is this the correct formula and am I using
> it
> right? I get .06 ohms
>
>
>
>
>
> Bob
>
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