Calculate the equivalent 4-20 mA loop current value for any given percentage of signal. We need field transmitter span, lower range value and upper range value.
Calculate 4-20 mA from Percentage
Current (mA) = [(16 ma)(X/100)] + 4
Where “X” is desired percentage of signal
calculate the ma for 40 % of signal
Current (mA) = (16 ma)(x/100)+4
Current (mA) = (16)(40/100)+4
Current (mA) = 10.4 ma