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Elements and Performance Criteria

1. Analyse open and closed loop systems
   • Open loop systems are distinguished from closed loop systems
   • Closed loop manual, time based automatic open loop and feed forward open loop are explained
2. Explain principles and operation of pneumatic control element and systems
   • Operation of a nozzle flapper and pneumatic amplifier unit is analysed and applied to transmitters, basic controllers and valve positioners
   • Control air supply system is defined
   • Principle of operation of direct and reverse acting pneumatic relays and application is clarified
   • Application of computing relays is analysed
3. Compare temperature transmitters
   • Pneumatic temperature transmitter is defined
   • Effect of changes in ambient temperature on thermocouples and resistance temperature detectors (RTD) is explained
   • Testing procedures and methods of simulation for both RTDs and thermocouples are explained
   • Characteristics and application of thermistors are outlined
4. Analyse application of differential pressure
5. transmitters
   • Application of differential pressure transmitters on board ships is confirmed
   • Arrangements of differential pressure transmitters for measurement of liquid levels in both closed and open tanks are explained
   • Mechanics for viscosity measurement using a differential pressure transmitter are analysed
   • Principle of using a differential pressure transmitter for flow measurement and the need for a square root extractor is explained
   • Use of a differential pressure transmitter for flow measurement is compared and contrasted with other types of meters
6. Explain engine room monitoring systems
   • Application of different speed sensing systems is analysed
   • Operating principles of torque monitoring systems applied to propeller shafting are explained
   • Arrangements of shaft power and indicated power monitoring are compared
   • Horizontal and vertical float level systems are compared with other tank level monitoring system in common use
   • Operating principle of oil-water interface sensor is explained
   • Methods of bearing temperature monitoring applied to diesel engine rotating parts are outlined
   • Machinery space monitoring and alarm system from a central control room are outlined
7. Explain procedure for transmitter calibration
   • Procedure for transmitter calibration for both pneumatic and electronic transmitters is applied
   • Test equipment is used for transmitter calibration
   • Relationship between process variables and output signals is demonstrated in a graph
   • Effects of transmitter dead band are defined
8. Explain operation of pneumatic 3 term controller and controller adjustment procedures
   • Common controller actions and applications are outlined
   • Operating principle of pneumatic 3 term controllers is outlined
   • Procedure for adjusting 3 term pneumatic controllers is applied and effects if incorrectly adjustment are explained
   • Typical controller settings for a PID controller are detailed
   • Integrated hand/auto station and 3 term controller are outlined and bumpless transfer is demonstrated
9. Explain actuators and control valves
   • Arrangements to provide fail safe requirements are outlined
   • Control valve and actuator are explained
   • Different types of actuators are identified
   • Operating principle of pneumatic valve positioners is explained
10. Analyse operation of hydraulic governors
    • Operating principle of proportional action hydraulic governors is explained
    • Importance of spring stiffness in relation to response is clarified
    • Purpose of an isochronous governor is outlined
    • Principle of operation of an isochronous hydraulic governor is outlined
    • Governor droop and its requirements for stable load sharing and engine stability is explained
11. Interpret electronic systems circuit diagrams
    • Electrical symbols commonly used in electronic circuits and sub-circuits are defined
    • Printed and colour codes used in electronic circuits are defined
    • Operation and maintenance manuals commonly used in the fault finding electronic circuits are used correctly
12. Explain basic operation of programmable logic controllers
    • Principles and operation of integrated circuit gates are explained
    • Operational function of input/output devices connected to a digital programmable logic controller is detailed
    • Methods of operation of flip flops, adders, counters, multiplexers and decoders are outlined
    • Methods employed when changing set point values in a digital programmable logic controller are outlined
13. Explain typical machinery space control loops and unmanned machinery spaces requirements
    • Fuel oil heating, LO cooling and JW cooling loop showing cascade and split range systems are outlined
    • Fuel oil viscosity control loop is outlined
    • Common methods of boiler water control and simple combustion control with burner management for an auxiliary boiler are outlined
    • Requirements and system arrangements for bridge control of main propulsion machinery including change over from local to bridge are explained
    • Common pressure control loops found in a ship’s engine room are identified
    • Unmanned machinery spaces (UMS) requirements are outlined
    • Troubleshooting procedures associated with control systems are outlined
    • Procedures for software version control are outlined

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.
Meters must include:	area meter rotometer target meter
Types of actuators may include one or more of the following:	electric hydraulic pneumatic

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Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include:

accessing information and sketch diagrams to interpret and explain testing requirements related to control systems on commercial vessels applying relevant work health and safety/occupational health and safety (WHS/OHS) requirements and work practices assessing own work outcomes and maintaining knowledge of current codes, standards, regulations and industry practices explaining principles of marine automation and process control identifying and interpreting numerical and graphical information, including schematic diagrams, relevant to control systems on commercial vessels identifying and suggesting ways of rectifying faults and malfunctions in control systems on commercial vessels identifying methods, procedures and materials needed to operate and maintain control systems on commercial vessels imparting knowledge and ideas through verbal, written and visual means reading and interpreting written information related to operate control systems on commercial vessels.

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Knowledge Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

actuators and control valves Australian standards for drawing symbols/layouts for schematic diagrams bridge control systems concepts of unmanned machinery spaces (UMS), and automated monitoring and control of machinery control and monitoring of ship machinery differential pressure transmitters electronic systems circuit diagrams engine room monitoring systems machinery space control loops and UMS requirements mechanical and electrical sensors open and closed loop systems operation of hydraulic governors operation of pneumatic 3-term controller and controller adjustment procedures operation of programmable logic controllers pneumatic and electrical instrumentation transmitters principles and operation of pneumatic control element and systems principles of basic pneumatic systems and action of pneumatic instruments principles of process control temperature transmitters tests and procedures required to meet UMS requirements total bridge control transmitter calibration WHS/OHS legislation, policies and procedures.

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