Problem 1: Consider the mechanical closed loop control system for the liquid level shown in Fig. 1.12. Explain how the mechanical control system works. Modify the components of this system with an electro-mechanical control system involving a digital controller, electrically actuated proportional valve, and sensor. Show the components in the modified system and explain how they would function using a block diagram. Explain how electronically controlled system works. Contrast the differences between the mechanically controlled and electrically controlled versions, and compare advantages and disadvantages of each Comparator Inflow Actuator Valve Sensor Tank Valve Outflow