TC10 : Troubleshooting Instrumentation and Control Systems

TC10 : Troubleshooting Instrumentation and Control Systems

  • course description:

    This course presents a systematic approach to troubleshooting and start-up of single- and multi-loop control loops. You'll see how pressure, level, flow, and temperature loops operate to maintain good process control systems. Knowledge of instrumentation and control is assumed.

  • course learning outcomes:

    At the end of the course, the participants will be able to;
    - Develop a systematic approach to troubleshooting.
    - Identify why a systematic approach to troubleshooting is most effective.
    - Follow specified procedures for proper loop check-out.
    - Verify, locate, and identify performance problems and the causes of the problems.
    - Take or recommend appropriate follow-up procedures to minimize problem recurrence.
    - Identify the common causes of sensor, transmitter, controller, and final control element problems.
    - Troubleshoot control systems.
    - Apply distributed control system (DCS) functions for troubleshooting.
    - Interpret pneumatic and electronic loops.
    - Apply safety practices for start-up.
    - Check and utilize control loop documentation.
    - Discuss applications and procedures to troubleshoot conventional analog control systems.
    - State the general operation features of a HARTTM control system.
    - State the general operations features of a FIELDBUS control system.
    - Compare general troubleshooting procedures for conventional, FIELDBUS, and HARTTM control systems.

  • Course outlines:

    - Introduction: Purpose of Troubleshooting | Reasons for Troubleshooting.
    - Approaches to Troubleshooting: Equipment History | Input/Output (Serial) | Shotgun Approach | Logical Analysis.
    - Logical Analysis Troubleshooting: Verify | Identify | Repair | Test | Follow-up on Problems.
    - Review of ISA Standard Diagrams and Symbols: Process and Instrument Drawings | Loop Drawings | Process Flow Diagrams.
    - Single-Loop Feedback Control Troubleshooting: Measurement Concerns | Valve Concerns | Controller Operations | Signal Conditioners | Troubleshooting Simulation.
    - Multi-Loop Control Systems Troubleshooting: Ratio (Controlled Stream, Wild Stream) | Cascade (Primary and Secondary Loop) | Three-Element Drum Level Control | Troubleshooting Simulation.
    - Introduction to Digital Control Systems: Advantages | Digital Control (DDC) | Supervisory | Supervisory Plus DDC | Analog Back-up | HARTTM Systems | FIELDBUSTM Systems.
    - Distributed Control Functions for Troubleshooting: Elements | Displays (Graphic, Trend, Alarm).
    - Start-up Concerns: Safety | Documentation | Tuning Review | Component Check-out.

  • practical aspects of the course:

    Classroom/Laboratory Exercises:
    - Diagnose and solve problems with single-loop control loops.
    - Diagnose and solve problems with ratio, cascade, and three-element control loop systems.
    - Diagnose problems using DCS displays for information.
    - Troubleshoot several single control loop problems.
    A hand-held calculator should be brought to class.

  • who should attend?

    - Who has the basic knowledge of pressure, level, flow, and temperature loops operation.

  • duration:

    2 Days


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