Phase 31: Advanced Instrumentation & Control Valves
This phase contains 5 sections and 31 checklist topics. Use the interactive phase page to track your own learning progress.
Transmitters
- Temperature
- Pressure
- Differential pressure
- Flow
- Level
Control valves
- Valve body
- Actuator
- Pneumatic actuator
- Positioner
- I/P converter
- Fail open
- Fail closed
- Position feedback
Learn
- Loop power
- Signal return
- Shield
- Grounding
- Junction box
- Marshalling panel
Calibration
- Zero
- Span
- Range
- Calibration
- Loop checking
- Instrument testing
Practical Field Additions
- Instrument range versus calibrated range and engineering units
- Field signal through junction box and marshalling to AI card
- Analog simulation using a certified loop calibrator (training only)
- Valve stroke test and open/close status verification (simulated/authorized)
- Record as-found and as-left calibration results
- Investigate wrong polarity, open loop, short and scaling errors