You are reading 93mA on a transmitter from a 420mA scale of

You are reading 9.3mA on a transmitter from a 4-20mA scale of differential flow. The flow range is 0-250 gpm. What is the flow

Solution

line equation: y = mx+c as m = 250/(20-4) = 15.625 and c = -62.5 if we put (4,0) in y = 15.625x+c.

y = 15.625x-62.5

at x = 9.3mA

the flow y = 15.625*9.3-62.5 = 82.8125gpm