A flow transmitter using a magnetic flow meter has a range of 0-200 GPM and a 4-20 mA output signal. If the transmitter is currently measuring a flow rate of 45 GPM, what is the output signal in mA?
A. 8.5 mA
B. 12.4 mA
C. 7.6 mA
D. 20.3 mA
Answer:C
A flow transmitter using a magnetic flow meter has a range of 0-200 GPM and a 4-20 mA output signal. If the transmitter is currently measuring a flow rate of 45 GPM, what is the output signal in mA?
A. 8.5 mA B. 12.4 mA C. 7.6 mA D. 20.3 mA
Explanation: The process of figuring out the output signal in mA for a specific flow rate, in a system that uses a 4-20 mA current loop protocol, involves a few steps. For this particular magnetic flow transmitter, it’s set up so that 4 mA corresponds to 0 GPM and 20 mA is equivalent to 200 GPM.