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>> Troubleshooting Instrumentation & Control Systems

Description :

This course teaches a systematic approach to troubleshooting and start-up as they apply to single and multi-loop control loops. Covers how pressure, level, flow, and temperature loops operate to maintain good process control systems. Knowledge of instrumentation and control is assumed .

You will be able to :

  • Understand 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, and final control element problems.
  • Troubleshoot control systems.
  • Apply DCS functions for troubleshooting.
  • Understand pneumatic and electronic loops.
  • Apply safety practices for star-up.
  • Check and utilize control loop documentation.

You will cover :

  • Introduction : Purpose of Troubleshooting/ Reasons for Troubleshooting/ the Bottom Line.
  • 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 / Safety Logic.
  • Single-Loop Feedback Control Troubleshooting : Measurement Concerns / Controller Operations / Signal Conditioners/ Troubleshooting Simulation.
  • Multi-Loop Control Systems Troubleshooting : Ratio (Two Controlled Streams, Wild Stream)/Cascade/ Three Element Control / Troubleshooting Simulation.
  • Introduction to Digital Control Systems : Advantages / Digital Control (DDC) / Supervisory DC/Supervisory Plus DDC/ Analog Back-up.
  • Distributed Control Functions for Troubleshooting : Elements/ Displays (Graphic, Trend, Alarm.)
  • Start-Up Concerns : Safety / Documentation / Tuning Review.

Classroom/ Laboratory Exercises :

  • Diagnose and solve problems related to single loop control loops.
  • Diagnose and solve problems with ratio, cascade and three-element control loops.
  • Diagnose problems using DCS displays for information.
  • Construct and tune a feedback control loop.
  • Troubleshoot several single loop control systems .