Marks (a) Figure 3 shows a block diagram of a typical refrigerator system Teeceralure sel Fan Condenser Coll Fan Evaporator Cols Emor Detector Cold Box Sensor Figure 3 Describe the function of the refrigerator system with regards to the following terms Measurement (2 marks) (2 marks) (2 marks) (2 marks) (2 marks) Setpoint ii. Error/detection/controller iv Process. vFinal control elements (b) A controller output is a -4mA to 20mA signal that drives a valve to control flow. The relationship between the current and the flow rate is given as 45 2m4] gal/min i Determine the flow rate for 12mA. (2 marks) i Determine the value of current that would produce a (3 marks) flow rate of 162 gal/min. A pressure measurement system uses a sensor that converts pressure into voltage according to the transfer function K,, #0.5Vp. This voltage is then converted to a current. As the pressure varies from 0 psi to 100 psi, the current varies from 4mA to 20mA. Find the transfer function equation for the conversion of voltage to current Hint: relationship between current and voltage is given as/-ml/ (c) (5 marks) 5i- Marks (a) Figure 3 shows a block diagram of a typical refrigerator system Teeceralure sel Fan Condenser Coll Fan Evaporator Cols Emor Detector Cold Box Sensor Figure 3 Describe the function of the refrigerator system with regards to the following terms Measurement (2 marks) (2 marks) (2 marks) (2 marks) (2 marks) Setpoint ii. Error/detection/controller iv Process. vFinal control elements (b) A controller output is a -4mA to 20mA signal that drives a valve to control flow. The relationship between the current and the flow rate is given as 45 2m4] gal/min i Determine the flow rate for 12mA. (2 marks) i Determine the value of current that would produce a (3 marks) flow rate of 162 gal/min. A pressure measurement system uses a sensor that converts pressure into voltage according to the transfer function K,, #0.5Vp. This voltage is then converted to a current. As the pressure varies from 0 psi to 100 psi, the current varies from 4mA to 20mA. Find the transfer function equation for the conversion of voltage to current Hint: relationship between current and voltage is given as/-ml/ (c) (5 marks) 5i