Unit 3393: Instrumentation and Control Technology

1. Introduction to Instrumentation and Control Technology

• Definition and scope
• Historical development
• Importance in manufacturing, process industries, and automation
• Key components and system architecture

2. Types of Sensors and Transducers

2.1 Sensors Overview

• Definition and role in instrumentation

2.2 Common Sensor Types

• Temperature sensors (thermocouples, RTDs)
• Pressure sensors (strain gauge, piezoelectric)
• Flow sensors (turbine, ultrasonic)
• Level sensors (ultrasonic, capacitive)
• Proximity sensors (inductive, capacitive)

2.3 Transducers

• Definition and difference from sensors
• Examples and applications

2.4 Operating Principles

• Physical phenomena utilized (resistance change, capacitance, electromagnetic, etc.)

3. Signal Conditioning and Processing

• Purpose of signal conditioning
• Common techniques: amplification, filtering, isolation, conversion (analog to digital)
• Noise reduction methods
• Data acquisition systems
• Signal processing basics

4. Control Systems Theory

4.1 Fundamentals

• Open loop vs closed loop control
• Feedback concepts

4.2 Control Algorithms

• Proportional (P), Integral (I), Derivative (D) control
• PID controllers and tuning

4.3 System Stability and Response

• Stability criteria
• Transient response and steady-state error

5. Programmable Logic Controllers (PLCs)

• Introduction and history
• Hardware components
• Programming languages (Ladder Logic, Function Block Diagram, Structured Text)
• Basic programming concepts
• Application examples in automation

6. Human-Machine Interface (HMI)

• Definition and importance
• Design principles for usability and safety
• Types of HMIs (touchscreens, panels, software interfaces)
• Role in monitoring and control

7. Industrial Communication Protocols

• Need for communication in automation
• Overview of protocols:
  • Modbus
  • Profibus
  • Ethernet/IP
• Comparison and use cases

8. Process Control Instrumentation

• Measurement devices for:
  • Pressure
  • Temperature
  • Flow
  • Level
• Integration of instruments in control loops

9. Calibration and Maintenance of Instruments

• Importance of calibration for accuracy
• Calibration procedures and standards
• Maintenance strategies to ensure reliability
• Troubleshooting common issues

10. Safety Instrumented Systems (SIS)

• Definition and role in process safety
• Design considerations and standards (e.g., IEC 61511)
• Components of SIS
• Examples of safety applications