Re: old ammeter

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• ... In parallel. An ammeter is actually a sensitive voltmeter. It seems the full scale voltage of your ammeter is 50mV. If the the shunt is 1 Ohm, the full
Message 1 of 51 , Feb 13, 2013
--- In Electronics_101@yahoogroups.com, "Nick" wrote:
>
> Hi guys, I'm fairly new to electronics and have a question about an old ammeter that I acquired. I know that it requires a shunt as the wires on the posts are small and it is a 100 amp meter. In the lower right corner of the meter face it shows [E.S.=50mv ]. What can I use for a shunt and does it go in series with the + or in parallel with the + and -. Will it read full scale with the shunt installed [not that I would ever need that much]. Thank you in advance for any info.
>

In parallel.
An ammeter is actually a sensitive voltmeter.
It seems the full scale voltage of your ammeter is 50mV.
If the the shunt is 1 Ohm, the full sacle current would be 50mA
If the the shunt is 0.1 Ohm, the full sacle current would be 500mA.
If the the shunt is 0.01 Ohm, the full sacle current would be 5A.
If the the shunt is ?? Ohm, the full sacle current would be 100A ;)
Message 51 of 51 , Mar 21, 2013