Sample Schemes of Work and Lesson Plan

Engineering OCR Level 3 Principal Learning in Engineering H811 Unit F559: Instrumentation and control engineering

This Support Material booklet is designed to accompany the OCR Engineering Diploma specification for teaching from September 2008.

Contents 2 Sample Scheme of Work: OCR Diploma in Engineering Level 3 Unit F559: Instrumentation and Control Engineering 3 Sample Lesson Plan: OCR Diploma in Engineering Level 3 Unit F559: Instrumentation and Control Engineering 20

2 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 60 GLH TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES Unit Overview

This unit will be externally assessed by a two-hour written examination paper. In Section A there will be a number of short answer questions and in Section B eight long answer questions. The learner is expected to answer all Section A questions and choose four questions from Section B.

The unit provides opportunities to learn about and apply the underpinning theory and principal components in instrumentation and control engineering. Learners will also learn how to use mathematical principles in the design and implementation of a simple control system. The unit will develop an understanding of instrumentation and control applications in industry, its impact on the environment and everyday life. It is intended that learners will develop further knowledge and understanding of a wide range of topics as listed under the learning outcomes section of this document. From this knowledge and understanding of the theory will come the development of the ability to solve problems in the context of engineering. The assessment criteria attempt to describe in the clearest terms possible, exactly what a learner will be able to do at the end of the learning experience. Just as a learning outcome describes events, so assessment criteria describes an activity that learners will be able to demonstrate their competence. Experience of the role of experimental work is important in any course in instrumentation and control and is recognised in this unit that presenters will include practical activities so that learners develop skills in conducting and recording experiments. The choice of the practical activities have been left to the discretion of the presenter.

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Engineering Diploma 3 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 60 GLH TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES Personal, Learning and Thinking Skills (PLTS).

Although not mapped because this is an externally assessed unit there are ample opportunities for learners to demonstrate and develop a number of their PLT’s during the learning experiences provided within this unit.

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4 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 2 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES The learner will be able to:  Explain what is meant by instrument and  Have a group discussion and show a video control engineering of a control system. This will then give an  Input → Control → Output  Draw a block diagram of a system showing insight as to why instrumentation and Draw a block diagram of a input, control and output control of systems is necessary  Input devices: system showing input, control,  Explain what is meant by the terms: input, potentiometer, thermistor, light dependent output and feedback control and output resistor and potential divider circuits etc (Systems approach to control engineering)  Homework  Output devices: Draw a labelled block diagram for a central signal lamp, heater, light emitting diode, heating system relay, buzzer, 7 segment display, dc motor etc

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Engineering Diploma 5 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES Demonstrate an  Explain, with the aid of labelled diagrams,  Davey, D.J. et al (1981) understanding of feedback what is meant by open loop control and Instrumentation and Control  Open loop control – a system of blocks that control theory closed loop control Cassell are linked together end to end without a  Give examples of systems that use built-in checking system Explain with the aid of the use feedback eg temperature control, positional of practical examples, what is control and servomechanism control.  Bolton, W. (1996) Engineering Instrumentation and Control  Closed loop control – a system of blocks meant by the term ‘open loop’,  State and apply the formula for overall gain that are linked together with a built-in Butterworth Heinmann ‘closed loop’ and ‘feed- in a system using (a) negative feedback (b) checking system forward’ positive feedback  Homework  Knight, S.A. (1989) State and apply the formula for  Overall gain = A/(1 + βA) for negative  Draw a labelled block diagram of a overall gain in a system using Electronics feedback system that is using (a) open loop Heinemann Newnes negative feedback control (b) closed loop control  Overall gain = A/(1 - βA) for positive feedback (Feedback control theory)  Explain, with the aid of labelled diagrams a system that uses  Bolton, W. (2006) (a) temperature control Instrumentation and Control systems (b) positional control Newnes (c) servomechanism control

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6 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES  From a worksheet carry out calculations for overall gain for negative and positive feedback systems Explain the concept of data  Explain what is meant by data signal  Davey, D.J. et al (1981)  Pressure senor/transducer: transmission signal transmission and use of Instrumentation and Control Resistive, strain gauge, inductive,  Explain, with the aid of a diagram, what is Cassell capacitive, semiconductor, ceramic, multiplexers. Understand the meant by a multiplexer operation of a basic two input piezoelectric and linear variable differential  Explain, with the aid of a diagram, the transformer multiplexer principles of operation of a basic two input  Bolton, W. (1996)  Level sensor/transducer: multiplexer Engineering Instrumentation and Control Conductivity, capacitive, ultrasonic, radar, (Data communications and  Use manufacturers catalogues to identify Butterworth Heinmann nucleonic, load cells, radiometric, multiplexers) and select suitable input microwave, hydrostatic and sonar sensors/transducers for practical applications  Tooley, M. (2008)  Carry out experiments using input devices Engineering Instrumentation, Measurement and Control Identify and select a suitable Elsevier input device for a specific sensing application to include:

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Engineering Diploma 7 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES pressure, level, flow,

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8 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES temperature, light,  Homework  Morris, A.S. (2001)  Flow sensor/transducer: displacement using Draw a labelled diagram of a control system Measurement and Instrumentation Ultrasonic, coriolis, vortex, magnetic and manufacturer’s data sheets. that you have Investigated. Identify the Principles differential pressure Undertake experiments types of sensors/transducers that are in use Butterworth and explain how they are calibrated or set using input devices  Temperature sensor/transducer: and how the signals from these devices are processed and displayed  Virtual Instrumentation Test lab Resistance, thermocouple, radiation pyrometer At a suitable time each learner should www.derby.ac.uk present their findings to the rest of the group  Control Engineering Lab  Displacement sensor/transducer: www.cussons.co.uk/co/pdf/ Diffraction grating, lasers and variable english/controlb.pdf resistance signal conditioning

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Engineering Diploma 9 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 12 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES Demonstrate an  Explain, with the aid of a diagram, what is  Duncan, T. (1998)  The basic op amp is a high performance, understanding of the use of meant by an operational amplifier Electronics for today and tomorrow directly coupled amplifier capable of high AD/DA converters, operational  State the main properties of an op amp with John Murray gain and stable operation over a wide range of frequencies amplifiers, PID controllers and reference to the open-loop gain, input and output impedances, giving values PLCs  Bolton, W. (1996)  Draw, a labelled diagram, of an op amp  Main properties: Engineering Instrumentation and Control showing the inverting input, non-inverting High open-loop voltage gain input and output Butterworth Heinmann Design, Analogue and Digital High input impedance  Explain the action and characteristics of an System Low output impedance op amp  Knight, S.A. (1989)  Draw, a graph, showing the transfer Electronics (Operational Amplifiers characteristics of an op amp  Advantages of negative feedback: Heinemann Newnes AD/DA convertors)  State the advantages of negative feedback Predictable and constant voltage gain in an op amp Reduced distortion of the output  Explain, with the aid of a circuit diagram, (a) Better frequency response giving increased an inverting amplifier (b) a non-inverting  Virtual Instrumentation Test lab bandwidth amplifier (c) a voltage follower (d) an op www.derby.ac.uk Increased stability amp summing amplifier (e) an op amp

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10 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 12 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES voltage comparator and (f) an op amp integrator

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Engineering Diploma 11 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

the action and construction of a (a) R-2R www.cussons.co.uk/co/pdf/ A = Vo/Vi = -Rf/Ri ladder DA converter (b) parallel AD english/controlb.pdf  Non-inverting amplifier: converter (c) counter-type AD converter A = 1 + (Rf/Ri)  Homework  Virtual control laboratory manual Design, construct and test systems linked to Eweb.chemeng.ed.ac.uk/courses/control/ practical applications within …./ intro.html  Voltage follower: the engineering sector 100% negative feedback is obtained by connecting the output directly to the  Explain, with the aid of diagrams,  Doebeline, E. (2008) inverting terminal (a) sequential control Measurement Systems (b) proportional control McGraw-Hill (c) proportional plus derivative control  Summing amplifier: (d) proportional plus integral control  Bolton, W. (2006) Vo = -(V1 + V2 + V3) (e) proportional, integral and derivative Instrumentation and Control systems control (PID) Newnes (f) process controllers (g) pneumatic controller  Sequential control: (h) operational amplifier controller  Bolton, W. (1996) Engineering Instrumentation and Control On-off mode

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12 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 12 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES  Use manufacturers catalogues to identify Butterworth Heinmann On-off devices and select suitable PID controllers for practical applications

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Engineering Diploma 13 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 12 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES Controllers  Explain, with the aid of diagrams, a  Sung, S.W. et al (2009)  Proportional control: programmable Logic Controller (PLC) Process Identification and PID control Float lever John Wiley and Sons Temperature/differential amplifier  Use manufacturers catalogues to identify and select suitable PLC controllers for  Queudo, J. et al practical applications  Pneumatic control: Digital Control 2000: Past, Present and Bellows and flapper nozzle Future of PID control  Carry out experiments using control devices Elsevier  Design, construct and test systems linked to practical control applications  Bolton, W. (2006) Programmable Logic Controllers  PLC – programmable memory that stores  Homework Elsevier instructions and implements functions Write a detailed report, showing all results, from experiments and testing of PID and  PLC Tutorial  PLC Ladder programmes PLC controllers www.Galil.mc.com

 PLC Control Engineer Icontrol.publicum.com

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14 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 12 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES  Industrial PLC Training Video Course  PLC Applications: www.bin95.com Conveyor belt packaging lines Pneumatic and hydraulic machines Production and refining processes Robots Signaling systems such as traffic lights

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Engineering Diploma 15 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 6 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES Explain the difficulties  Explain what is meant by the term signal and  Haslett, C. (2008)  A waveguide refers to any linear structure encountered when transmitting wave guides Essentials of Radio Wave Propagation that conveys electromagnetic waves signals using wires as  Explain the difficulties encountered when Cambridge UP between its endpoints frequency increases transmitting signals using wires as the  A waveguide is a special form of frequency increases transmission line consisting of a hollow,  Waveguides basic tutorial Understand the basic concept  Explain the effect on the transfer of signals metal tube. The tube wall provides www.esmartstart.com distributed inductance, while the empty of operation of wave guides and over long distances when using wire cables  Explain, with the aid of diagrams, the types space between the tube walls provide their use when transmitting distributed capacitance of wave guide propagation that are in  Electric and magnetic fields signals transverse mode: (Signals and wave guides) www.behindtheguesses.blogspot.com? TE modes (Transverse Electric) have no 2009/07/transverse-electric-and-  Waveguides are considerably less electric field in the direction of propagation. magnetic-fields.html complicated than a two conductor cable in TM modes (Transverse Magnetic) have no their manufacture and maintenance magnetic field in the direction of propagation. Moisture is not a severe problem as with  Waveguides TEM modes (Transverse ElectroMagnetic) coaxial cables www.2.slac.stanford.edu/vvc/accelerator/ have no electric nor magnetic field in the Do not need gas filling waveguide.html direction of propagation. There are no concerns with proper Hybrid modes are those which have both conductor-to-conductor spacing, or of the

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16 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 6 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES electric and magnetic field components in the consistency of the dielectric material, since direction of propagation the only dielectric in a waveguide is air

 Homework  Waveguides Write a report covering all aspects of a www.esmart.com/_framed/250x/ waveguide system of your choice radionistics/balanced_lines.html

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Engineering Diploma 17 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES Explain what is meant by the  Explain, what is meant by the terms:  Davey, D.J. et al (1981)  Actuator – the element of a correction unit terms: actuators regulators, actuator, regulator, transducer and Instrumentation and Control that provides the power to carry out the transducers and instrument Instrument display Cassell control action displays  Regulator – A feedback control system in which the reference input is fixed over the  Use manufacturers catalogues to identify  Bolton, W. (1996) operating time period. The primary purpose Undertake experiments using and select suitable actuators, regulators and Engineering Instrumentation and Control of a regulator is to maintain a constant output transducers for practical applications controllers, actuators and Butterworth Heinmann  Transducer – the element that converts a regulators. Select controllers, change in some physical variable into a  Explain what is meant by a pneumatic  Leatham-Jones, B. (1987) related change in some other physical actuators and regulators for system variable Elements of Industrial Robots engineering applications  Instrument display – a device for recording Pitman  Draw symbols for the following: the measured variable (Actuators and instrumentation Single acting cylinder  Bolton, W. (1991) displays) Three-port valve Instrumentation & process Double acting cylinder Measurements  Apply the formula: Five-port valve Longman Pressure = force/cross-sectional area

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18 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES

 Explain, with the aid of diagrams, the  Johnson, C. (2005)  Electrical final control elements: application of a (a) single-acting cylinder (b) Process Control Instrument Technology Switching devices double acting cylinder, in a control situation Pearson Education Solenoid type devices Motors  Explain, with the aid of a diagram, how a  Bentley, J. (2004) shuttle valve is used when controlling a Principles of Measurement Systems  Analogue/Digital indicators single-acting cylinder from two positions Pearson Education  Alphanumeric displays – LED and LCD  CRO  List and use all types of instrument display  Analogue/Digital recorders devices  Bolton, W. (2006) Instrumentation and Control systems Newnes  Homework Write a report about the experiments that

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Engineering Diploma 19 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES you have carried out during this session

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20 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES Understand the purpose of  Explain what is meant by a monitoring  Ibrahim, D. (2002)  Monitoring – is the act of observing monitoring control systems control system Microcontroller-Based Temperature something and sometimes keeping a record Monitoring and Control of it for a specified period of time  Describe, with the aid of diagrams, a Newnes production-line monitoring system (Industrial and commercial  Jaguar Ltd (1994) applications of control  Describe, with the aid of diagrams, an alarm Just In Time Production Line engineering) system that protects a workshop building on MCB UP an industrial estate

 Chen, H. et al (2009)  State the advantages of using a video Assembly on moving production line camera as part of a monitoring system based on sensor fusion Emereld Group  Explain, the use of a digital camera within a monitoring system  Burglar Alarm Monitoring www.alarm-monitoring.co.ul  Describe, with the aid of diagrams,

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Engineering Diploma 21 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES monitoring systems that are used in motor vehicles

 Explain the principle of operation of an  CCTV Intruder Alarms embedded monitoring system in white goods www.mesonline.co.uk

 Homework  Programming Embedded Systems Write a detailed report about a monitored www.le.ac.uk/eg/mjp9/pes1ohp control system that you are familiar with

 How washing machines work  Embedded system within: Home.howstuffworks.com Washing machines Spin dryers Microwaves  Printing Press Measurement and Control Cookers www.captec.co.uk Printers Use computer packages to

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22 of 27 Engineering Diploma Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES  Explain what is meant by simulation software  Mobile phones model and test analogue and  Virtual Control Laboratory Manual digital instrumentation and Eweb.chemeng.ed.ac.uk/courses/ control circuits from an  Describe how a computer package can be Control/courses/…/intro.hmtl engineering environment. used to model and test analogue and digital Review and act on outcomes instruments  Proteus Simulation (Simulation software) www.labcenter.co.uk

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Engineering Diploma 23 of 27 Sample Diploma Scheme of Work OCR LEVEL 3 PRINCIPAL LEARNING IN ENGINEERING H811 UNIT F559: INSTRUMENTATION AND CONTROL ENGINEERING

SUGGESTED TEACHING 8 HOURS TOPIC INSTRUMENTATION AND CONTROL ENGINEERING TIME SUGGESTED TEACHING AND TOPIC OUTLINE SUGGESTED RESOURCES POINTS TO NOTE HOMEWORK ACTIVITIES  Carry out tests using simulation software on  Circuit Wizard Software Simulator control circuits from an engineering www.maplin.co.uk environment

 Control System Design  Use virtual test equipment such as signal www.Maplesoft.com/Simulation generators, oscilloscopes, voltmeters, ammeters and logic probes  Virtual Instruments www.spice-software.com  Produce test records against initial design criteria  Bytronic-Ladder Logic Simulation Software  Homework www.Bytronic.net/html Having used a simulation software package, describe, with the aid of diagrams, the experiments carried out and show the test  Plant Simulation results obtained and your conclusions www.ferret.com

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24 of 27 Engineering Diploma Sample Diploma Lesson Plan OCR Level 3 Principal Learning in Engineering H811 Unit F559: Instrumentation and control engineering

OCR recognises that the teaching of this qualification will vary greatly from centre to centre and from presenter to presenter. With that in mind, this lesson plan is offered as a possible approach but will be subject to modifications by the individual presenter.

Lesson length is assumed to be two hours but may be broken up to suit centres individual needs.

Learning Objectives for the Lesson

Objective 1 Learners can explain, with the aid of a diagram, a basic measurement system. Objective 2 Learners can explain, with the aid of diagrams, the working properties of a variety of temperature sensors. Objective 3 Learners can select and use a temperature sensor in experiments.

Recap of Previous Experience and Prior Knowledge

 Learners have been introduced to the concept of instrumentation and control engineering and are aware of:  block diagrams  the definition of a sensors  the difference between heat and temperature and the temperature coefficient of resistance.

Content

Time Content 10 minutes Introduction View a video showing temperature sensors at work Verbal exposition and Questioning.

Basic three element instrumentation system – Block Diagram (a) input or sensor device (b) signal processor or controller (c) output device or receiver. 15 minutes State that input sensors are called primary transducers

List temperature primary transducers: Bimetallic strip Glass thermometer

Engineering Diploma 25 of 27 Sample Diploma Lesson Plan

26 of 27 Engineering Diploma Sample Diploma Lesson Plan

Time Content Liquid expansion and vapour pressure sensor Resistance type Thermocouples. Look through a manufacturers catalogue and identify the listed primary transducer. 30 minutes Describe, with the aid of a diagram, the action and construction of the listed primary transducers. 25 minutes Explain the difference between the following types of thermocouple transducers: Type J/K/T/E/RS/B/N and L.

In a resistance type thermometer state that the relationship between temperature and resistance is given by Rt = R0 (1 + αt).

Worked example: 0 A resistance thermometer has a resistance R0 of 100Ώ at 0 C with a temperature coefficient α of 0.004. Calculate the temperature t when the resistance rises to 1020.

Activity Provide a worksheet of calculations.

Problems associated with glass thermometers: Not very useful for industrial purposes because they are brittle Mercury solidifies at -400C Alcohol boils at about 1200C Not very accurate Reading errors can occur. 20 minutes Carry out experiments using at least two types of temperature sensors.

Consolidation

Time Content 5 minutes Quick fire questions about temperature sensors. 5 minutes Class discussion – Has learning taken place? 10 minutes Learners are required to submit a folder, which includes, for each experiments: Homework a) a title and description about the experiment b) a list of equipment used c) labelled diagrams of how the equipment was assembled d) a description of the methods used to conduct the experiment e) readings taken and calculations made f) presentation of experimental results g) an explanation of the theory behind the experiment h) a statement regarding errors and degree of accuracy i) final comments and conclusions drawn from the experimental data.

Engineering Diploma 27 of 27