Hello All,
I am looking into making a homemade shunt resistor from copper wire to measure high amperage with a digital multimeter. I have found that (Meter operating voltage) / (max meter amperage) = meter resistance in ohms. and (Meter resistance) / (Ohms/ft. copper) = Shunt wire length in feet.
The question is...if meter is rated 10A un-fused...and I am going to be measuring up to 30A, should I calculate the (max meter amperage) as 10A or 30A ? Has anyone built their own shunt before?
I am looking into making a homemade shunt resistor from copper wire to measure high amperage with a digital multimeter. I have found that (Meter operating voltage) / (max meter amperage) = meter resistance in ohms. and (Meter resistance) / (Ohms/ft. copper) = Shunt wire length in feet.
The question is...if meter is rated 10A un-fused...and I am going to be measuring up to 30A, should I calculate the (max meter amperage) as 10A or 30A ? Has anyone built their own shunt before?