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Ammeter Shunt Calculations

Amp meters can be used to measure different current ranges, to do this the meter must have a shunt resistor fitted in parallel with the measuring circuit.

The formula to determine the shunt resistor for an ampere meter is as follows:

Rs = Rm / (n - 1)

Where Rs is the shunt resistor, Rm is the meters internal resistance and n is the multiplier (Current to be Measured).

For a full range of Panel Meters

Ammeter Shunt

 

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