The range of the temperature measuring system used in conjunction with a Model 130 proportional-only controller is 0 to 150°f (66°C). The output is 9 psi (60 kPa) when the set point and indicator are both at 75°f (24°C). If the proportional band is 200 percent, what is the output when the measurement is 150°f (66°C)?
A. 9 psi (60 kPa)
B. 3 psi (20 kPa)
C. 12 psi (83 kPa)
D. 15 psi (100 kPa)
Answer:C
The range of the temperature measuring system used in conjunction with a Model 130 proportional-only controller is 0 to 150°f (66°C). The output is 9 psi (60 kPa) when the set point and indicator are both at 75°f (24°C). If the proportional band is 200 percent, what is the output when the measurement is 150°f (66°C)?
A. 9 psi (60 kPa) B. 3 psi (20 kPa) C. 12 psi (83 kPa) D. 15 psi (100 kPa)