Unit 1
Introduction to process control, process variables, degree of freedom, Industrial measurement systems – different types of industrial variables and measurement systems elements – sensors and transducers for different industrial variables like pressure, torque, speed, temperature etc. – sensor principles – examples of sensors – sensor scaling – Industrial signal conditioning systems – Amplifiers – Filters – A/D converters for industrial measurements systems – review of general Industrial instruments – I/P and P/I converters, pneumatic and electric actuators, valve positioned, control valves – characteristics of control valves, inherent and installed characteristics, valve body, globe, butterfly, diaphragm, ball valves, control valve sizing, cavitations and flashing, selection criterion, Servo drives, Stepper motor drives.