A level transmitter using a differential pressure sensor has a range of 0-40 inches of water column (inWC) and a 4-20 mA output signal. If the transmitter is currently measuring a differential pressure of 28.5 inWC, what is the output signal in mA?
A. 15.4 mA
B. 12.4 mA
C. 10.4 mA
D. 19.4 mA
Answer:A
A level transmitter using a differential pressure sensor has a range of 0-40 inches of water column (inWC) and a 4-20 mA output signal. If the transmitter is currently measuring a differential pressure of 28.5 inWC, what is the output signal in mA?
A. 15.4 mA B. 12.4 mA C. 10.4 mA D. 19.4 mA
Explanation: To calculate the corresponding current output of a differential pressure sensor, you’d apply the process in the 4-20mA current loop standard. This standard sets 4mA as the lower limit (0 inches of water column, or inWC, in this case), and 20mA as the upper limit (40 inWC for this sensor).