Elements describe the essential outcomes. | Performance criteria describe the performance needed to demonstrate achievement of the element. |
1 | Explain control theory | 1.1 | Time lag is distinguished from time constant |
1.2 | Effect resistance and capacitance has on process system response is demonstrated |
1.3 | Transfer function is established and defined |
1.4 | Effect of variations in undamped natural frequency on control systems is illustrated |
2 | Analyse signal transmissions systems used for monitoring, controlling and shutting down machinery | 2.1 | Methods and limitations of different signal transmissions systems are compared |
2.2 | Standard pneumatic system and standard analogue 4-20 mA system of signal transmission are compared and contrasted |
2.3 | System of a communications bus using digital signal transmission with optical and electronic systems is explained |
2.4 | Limitations and advantages of a communications bus system are analysed |
3 | Analyse electronic transmitters | 3.1 | Principles of operation of a typical 4-20 mA transmitter are explained |
3.2 | Application of strain gauges and changes in capacitance as sensors for pressure and differential pressure transmitters are outlined |
3.3 | Methods of testing transmitter outputs are recorded explained |
3.4 | Application of differential pressure transmitters to liquid level sensing is analysed |
3.5 | Use of a differential pressure transmitter to measure flow is analysed and compared with non-restrictive electronic systems |
4 | Evaluate final control element arrangements | 4.1 | Pneumatic, electric and hydraulic actuation are compared and contrasted |
4.2 | Arrangements for locking pneumatic control valves in their last position on air failure are outlined |
4.3 | Control valve trim characteristics are explained |
4.4 | Control valve selection for machinery space duties are analysed |
5 | Evaluate electronic temperature sensors and transmitters | 5.1 | Colour coding of tails and compensating cables for thermo couple types are identified |
5.2 | Temperature/mV outputs and application of common thermo couple types are illustrated |
5.3 | Relationship between resistance and temperature for PT100 resistance temperature device and method of testing three wire arrangements is explained |
5.4 | Arrangements of interfacing thermo couples and RTDs with 4-20ma systems and 1-5 volt interface cards are analysed |
6 | Analyse PID electronic controllers | 6.1 | Principle of operation of an electronic analogue 3-term controller and how adjustments are made is explained |
6.2 | Open loop response and PID controller testing and calibration is demonstrated |
6.3 | Application of modern single loop digital controller is explained |
6.4 | Programming requirements for manual and auto tuning when adjusting digital controllers are demonstrated |
7 | Evaluate performance of machinery space monitoring alarm and control systems | 7.1 | Capacitance sensing and float level monitoring systems are compared |
7.2 | Single, two and three element boiler water level control systems involving feedwater and cascade systems are analysed |
7.3 | Requirements and systems to provide advanced combustion control systems and sequential control for burner management are outlined |
7.4 | Concepts and arrangements for central cooling and load dependent cooling control systems are explained |
7.5 | Main engine control arrangements for fixed pitch propeller and CPP systems requiring sequential control are analysed |
7.6 | Tests and procedures to meet UMS requirements are explained, and alarm and monitoring systems involving data loggers, alarm print outers, and trend analysis are evaluated |
8 | Explain fault-finding techniques for control systems | 8.1 | Governor adjustments are demonstrated and effect of incorrect adjustments is explained |
8.2 | Common defects in mechanical and electronic governors are itemised |
8.3 | Indication of faults and procedures of fault finding in 4-20mA loops are explained |
8.4 | Fault-finding techniques in pneumatic control systems and their respective components are analysed |
8.5 | Fault-finding flow diagram is illustrated |
8.6 | Off limit performance, fault detection and principles of rectifications for common engine room control systems are evaluated |
9 | Analyse measurement and test equipment used for fault-finding electronic apparatus | 9.1 | Principles of operation of cathode ray oscilloscope are explained |
9.2 | Need for pulse shaping in electronics is examined |
9.3 | Different methods of testing common alarms systems are compared |
9.4 | Methods used in stabilisation, surveillance and monitoring of control power supplies are demonstrated |
10 | Analyse governors | 10.1 | Governor faults are diagnosed and interpreted, identifying and evaluating appropriate adjustments and maintenance to be made |
10.2 | Specific governor applications requiring torque limitation, critical speed range avoidance are outlined |
10.3 | Typical electronic governors are explained using labelled diagrams to indicate major components and features |
10.4 | Governor adjustments to allow operation of propulsion and power generation diesels in both shared load and standalone applications are specified |
10.5 | Response of a diesel engine governor on change in engine load using both feedback and feed forward control is explained using labelled diagrams to indicate major components and adjustments |
11 | Explain operational applications of analogue and digital programmable logic controllers (PLC) | 11.1 | Methods of programming PLCs are assessed |
11.2 | Memory applications of PLCs are outlined |
11.3 | Input devices used with analogue PLCs are identified |
11.4 | Fibre optic data transmission systems are explained |
11.5 | Methods used for storing binary data and operating registers are explained |
12 | Document procedures for programming, operating and maintaining PLC controlled systems | 12.1 | Procedure for identifying required control system functions are explained |
12.2 | Procedure for connecting PLC to system control elements is outlined |
12.3 | System operating procedure is outlined |
12.4 | Procedure for modifying system and program as necessary to provide adequate and appropriate safety requirements, is outlined |
12.5 | Maintenance and fault-finding procedures are outlined |
12.6 | Required documentation is prepared and accuracy is verified |