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Ammeter and shunts

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corvairkelso

Joined: 16 Aug 2008
Posts: 2

Posted: Tue Sep 02, 2008 12:38 am Post subject: Ammeter and shunts

Bob, I have a question regarding ammeters and shunts.  I have some 15 amp dc meters with internal shunt.  I would like to be able to modify one to read 45 amps (or 3 times origional) and one to read 225 (15 times)amps.  I have access to the internal shunt but do not know its value. It would be easy to snip the internal shunt out leaving the meter wires intact. Is there a way to use external shunts and include a resistor in the feed line to the meter to alter the scale?  I have access to 50 amp shunts and 200 amp shunts but have not seen 45 and 225 shunts.  I could change the scale to 50 and 200.  If you have already covered this, please just include the link.  Thanks, Tom

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