>> 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 .
