[Boatanchors] general OT question on panel meters

[W2HX]

Hello all,

I purchased a round, analog panel meter 0-30 ADC for a project. Printed on the face of the meter says "FS=50MVDC" which I take to mean full scale deflection will occur at 50 mV DC.  Question is, can I get any 50mV shunt (minimum 30A, of course) and will it work? Or does the shunt need to somehow be 30A = 50mVDC? If I got a 100A 50mVDC shunt, will this indicate incorrectly on the meter?

Thanks in advance for the OT question


73 Eugene W2HX