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Inst Tools > Blog > Control Systems > Fault in the Temperature Loop

Fault in the Temperature Loop

Last updated: March 30, 2020 10:23 am
Editorial Staff
Control Systems
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An operator tells you the stack temperature of this incinerator is running high as indicated by TIC-37. The setpoint is set at 1400 degrees F, but the PV display shows a steady 1489 oF: Find the fault in the temperature loop.

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Fault in the Temperature LoopAnswers:Read Next:

Fault in the Temperature Loop

Find the Fault in the Temperature Loop

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Identify the likelihood of each specified fault in this process. Consider each fault one at a time (i.e. no coincidental faults), determining whether or not each fault could independently account for all measurements and symptoms in this process.

The below list shows the different types of fault conditions. Identify whether these faults are possible or impossible to cause the issue in the temperature loop?

  • TT-37 miscalibrated (reading too low)
  • TT-37 miscalibrated (reading too high)
  • TIC-37 in manual mode
  • TIC-37 in auto mode
  • FIC-38 in manual mode
  • FIC-38 in auto mode
  • FIC-38 in cascade mode
  • FT-38 miscalibrated (reading too low)

Answers:

Temperature Loop Faults

Join the Discussion! Share your answers with us through below comments section.

Read Next:

  • Cascade Temperature Control
  • Process Control Fault Analysis
  • Questions on P&ID Diagrams
  • Water Level Control System
  • Problem on Tachogenerator
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1 Comment
  • Travis says:
    November 11, 2023 at 4:09 pm

    Should really consider trim issues on FV-38. Chances are nobody messes with the stack temp controls.

    Reply

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