Multiskilling Instrumentation Level 2
Synopsis
This 2-day workshop builds on the content of Level 1. Continues with Level and Flow measurement techniques, examines Control Valves, explores the process of getting to Instrument Quality compressed air. Examines Relay Logic. Includes fault-finding exercises.
Content
Level Measurement:
Point Level Detection: Conductivity; Capacitive; Resonant Devices; and various Mechanical Level switches demonstrated, and shown in action.
When to use Normally Open- vs Normally Closed switches.
Continuous Level Measurement: Float/Displacer; Hydrostatic pressure; Ultrasonic; Radar, free space and guided; Capacitive; Nuclear.
Calibration exercises, and demonstrating Level Measurement in action.
Flow Measurement:
Types of Flow; flow profiles and their importance; gases vs liquids; turn-down ratios.
DP and Pitot, relative advantages & disadvantages; Vortex shedding; Magnetic flow meters; Ultrasonic time-of-flight & Doppler; Coriolis mass flow; thermal mass flow; Positive Displacement; turbine.
Instrument quality air: How to achieve this. Introduction to basic pneumatics. Relay logic exercises.
Fault-finding exercises: How to measure around a loop, with deliberately introduced faults, and discussions around fault-finding.
Control Valves:
Sliding Stem: Body types; plug/seat variations; characteristics; seals; actuators; positioners. Sliding- vs Rotary stems types. Problems encountered.
Outcome
Builds on what was learned in Level 1, and further builds confidence, especially about how to trace faults. The idea of a control system emerges, preparing for Level 3.
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