MANCHESTER 1824 The University of Manchester Dept. of Electrical and Electronics Engineering Lab manual Course Unit: Electrical Engineering Fundamentals Course Unit Number: EEEN10492 Dept. of EEE policy for coursework applies for late submission. This assignment is worth 15% of the course unit. Academic Malpractice Academic Malpractice can result from a deliberate act of cheating and may be committed unintentionally. Academic malpractice can take many different forms. Plagiarism is only one example. The University defines plagiarism as, presenting the ideas, work, or words of other people without proper, clear, and unambiguous acknowledgement. There are University guidelines on avoiding plagiarism and other forms of academic malpractice such as collusion or the fabrication or falsification of data that are explained in, The University of Manchester Guidance to Students on Plagiarism and Other Forms of Academic Malpractice, from the Teaching and Learning Support Office, http://www.tlso.manchester.ac.uk/map/teachinglearningassessment/assessment/sectiond- theprocessofassessment/academicmalpracticeincludingplagiarism/ Academic malpractice is taken seriously by the University and further information on plagiarism can be found in the 'Undergraduate Course Handbook', which you received during Welcome Week. To help you avoid plagiarism, the University Library has a number of resources on the Library Website: http://subjects.library.manchester.ac.uk/referencing There is an interactive BlackBoard (Bb) module titled, 'Academic Malpractice: All You Need to Know' within the Student Study Essentials Course that you are advised to familiarise yourself with. Presentation Guidelines 100% for providing results, however, the awarded mark will have up to 20 marks deduction penalty due to poor presentation/formatting. EEEN10492 lab script 2023-24 1 This coursework tests your understanding of the following Learning Outcomes in this course unit (See unit specification for further details). Use basic electrical meters to measure electrical quantities, such as current, voltage and resistance. • Apply circuit analysis methods to predict resistance, currents, and voltages in a practical circuit and to compare theoretical models with actual measurements. • Build a circuit involving in finding a resistance load to achieve maximum power. • Apply safe working practice methods covered in the lectures. • Help you work collaboratively in a team, via your laboratory coursework experience. Penalties If you do not prepare in advance or you are late, it is unlikely that you can finish on time and your marks will be sacrificed. • Please come on time! 10% penalty if you arrive “10 minutes" late. You are NOT allowed to carry out the lab if you arrive "20 minutes" late. 10% penalty if you do not leave the workspace on time and tidy. Please note - these penalties may appear harsh, but they are easily avoided with care. Guidance on late submission Any work submitted at any time within the first 24 hours following the published submission deadline will receive a penalty of 10% of the maximum amount of marks available. Any work submitted at any time between 24 hours and up to 48 hours late will receive a deduction of 20% of the marks available, and so on, at the rate of an additional 10% of available marks deducted per 24 hours, until the assignment is submitted, or no marks remain. If the work is submitted more than 10 calendar days late, then it is considered as a non-submission and a mark of zero applied. In cases where an extension has already been agreed via mitigating circumstances procedures and DASS extensions, those reports will be marked as normal. No attendance = No Submission = Zero mark EEEN10492 lab script 2023-24 2 General Instructions Equipment List • Locktronics board • Mounted resistor (R1, R2, R3, R4, R5, R6, R7, 300 N, 1.5 KM) • Mounted capacitor 0.1 μF • Variable resistor potentiometer 1 k • Mounted Op-amp • Power supply • Digital multi-meter • Function generator . Digital oscilloscope ● Cables Brief introduction to the equipment Figure 1 shows a Locktronics board and plug-ins for a simple circuit. The vertical metal pillars are conductive. Plugs at the ends of wires can be pushed into the holes to connect signals and to measure voltages and currents etc. The plug-ins have components connected on their reverse sides, in this case resistors and connecting wires. The circuit shown in Figure 1 has R1 and R5 connected in parallel with R7 in series with them. R7 LOCKTRONICS R5 KEYSIGHT $114ORKTARCIA A On/Off On AMAX TO Figure 2 Volt Curro Tracking Enter Recall On 9 Figure 1 Figure 2 shows a Keysight triple power supply. Each of the three power supplies is activated by a push-button on the top right of the instrument. Each power supply, when selected, can be adjusted and the value is shown on the panel. Both voltage and current can be set. The three outputs are shown in pairs at the bottom of the instrument. How to get a positive voltage output and a negative voltage output Channels 2 and 3 are electrically isolated, i.e., they are independent channels. Set Channels 2 and 3 at the required voltages, and connect your cables as shown in Figure 3. EEEN10492 lab script 2023-24 3 All On/Off On 240 VDC MAXTO On On Positive output Common Negative output Figure 3 Figure 4 shows a DMM, which is used to measure AC and DC voltage, AC and DC current and resistance. When measuring voltage, current or resistance, appropriate sockets on the right of the instrument must be used. For example, for voltage measurement, the socket on the top right is for positive voltage signal and the socket immediately below is for the less positive voltage (often ground). This pair of sockets is used for AC and DC voltages. What is actually chosen to be measured is set by the six push buttons on the top of the instrument, labelled DCV, ACV, 2W (Ohms 2 wire), Freq, Cont and Temp, which are DC volts, AC volts, resistance (2 wire measurement), frequency, continuity (resistance with an added bleep) and temperature. KEYSIGHT 34460A 6 Digit Multimeter Fevot H 0000 8000000 0000 Doplay Acquire Run/Stop Single 000 LO Sense A 04W Input VO+ HI 200 v 750 VAC ر LO CAT A Figure 4 Note that some of these buttons have another heading above them. These are accessed by holding down the Shift button and pressing the appropriate one of the six setting buttons. This will give the settings, DCI, ACI, Q24W (Ohms 4 wire), capacitance and diode. There is not an alternative for the Temp button. You can also measure DC current, AC current, resistance (4 wire measurement), capacitance and diode. For this experiment, you may just use AC/DC voltage and current modes as well as resistance (2 wire) and continuity. EEEN10492 lab script 2023-24 4 Measuring voltage and current To measure voltages, connect the power supply to the circuit. Choose power supply one (the outputs have a yellow background), the "red" output is positive with respect to the "black" output. Press the yellow button on the top of the power supply to set the voltage and current by turning the voltage and current knobs. Press the yellow button for power supply one to turn on the output. On the DMM, press the DC Voltage Function button (DCV). For the lead connections, plug in two leads to the DMM, • • the red one, Input V Hi socket, at the top-right corner the black one, Lo socket, immediately below. Then connect the other end of the leads to the two pillars on the Locktronics board. You should then be able to read the voltage on the DMM. Under this scenario, the meter has been inserted in "parallel" with the circuit. Now we are going to measure the current. Do the following: (1) Disconnect the DMM from the circuit (VERY IMPORTANT) (2) Change the Function of the DMM to DC current (DCI – which is Shift and DCV) (3) Move the lead from the Input V Q connector on the DMM to the red "I" input, which also has the label 3A. To measure current, the DMM must be connected so that the current passes through the interested component as well as through the meter. This means that you must break the circuit and then insert the meter in "series" with the related component. Function generator and oscilloscope Figures 5 and 6 shows a function generator and an oscilloscope respectively, used in this lab. EEEN10492 lab script 2023-24 5