What is the formula for calculating the process variable (PV) in a system with a 4-20 mA current loop and a range of 0-100 psi?
A. PV = (I + 4)(100/16)
B. PV = (I – 20)(100/(-16))
C. PV = I*(100/16)
D. PV = (I – 4)(100/16)
Answer:D
What is the formula for calculating the process variable (PV) in a system with a 4-20 mA current loop and a range of 0-100 psi?
A. PV = (I + 4)(100/16) B. PV = (I – 20)(100/(-16)) C. PV = I*(100/16) D. PV = (I – 4)(100/16)
Explanation: In a system with a 4-20 mA current loop and a range of 0-100 psi, the process variable (PV) can be calculated using the formula PV = (I – 4)(100/16), where I is the current in mA.