ECE 2110 Electrical Engineering Laboratory 1

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Course Information i,Introduction i,Student Responsibilities i. Laboratory Teaching Assistant Responsibilities ii,Faculty Coordinator Responsibilities ii. Lab Policy and Grading ii,Course Goals and Objectives iii. Use of Laboratory Instruments iv,Ammeters and Voltmeters iv. Instrument Protection Rules iv,Data Recording and Reports vi.
The Laboratory Notebook vi,The Lab Report vi,Lab 1 Orientation 1. Lab 2 DC Measurements 3,Lab 3 Workstation Characteristics 7. Lab 4 Introduction to LTspice 13,Lab 5 Network Theorems I 17. Lab 6 Network Theorems II 22,Lab 7 The Oscilloscope 27. Lab 8 RC and RL Circuits 34,Lab 9 Series RLC Circuits 38.
Lab 10 Statistical Analysis 44,Lab 11 Design Lab 47. Lab 12 Final Exam 51,Appendix A Safety 53, Appendix B Fundamentals of Electrical Measurements 57. Appendix C Fundamentals of Statistical Analysis 65. Appendix D Resistor Identification 73,Course Information. 1 Introduction, This course is intended to enhance the learning experience of the student in topics encountered in. ECE 2020 In this lab students are expected to get hands on experience in using the basic measuring. devices used in electrical engineering and in interpreting the results of measurement operations in terms. of the concepts introduced in the first electrical circuits course How the student performs in the lab. depends on his her preparation participation and teamwork Each team member must participate in all. aspects of the lab to insure a thorough understanding of the equipment and concepts The student lab. teaching assistant and faculty coordinator all have certain responsibilities toward successful completion. of the lab s goals and objectives,1 1 Student Responsibilities.
The student is expected to be prepared for each lab Lab preparation includes reading the lab. experiment and related textbook material If you have questions or problems with the preparation. contact your Laboratory Teaching Assistant LTA but in a timely manner Do not wait until an hour. or two before the lab and then expect the LTA to be immediately available. Active participation by each student in lab activities is expected The student is expected to ask. the LTA any questions they may have Do not make costly mistakes because you did not ask. a question before proceeding, A large portion of the student s grade is determined in the comprehensive final exam resulting in. a requirement of understanding the concepts and procedure of each lab experiment for the successful. completion of the lab class The student should remain alert and use common sense while performing. a lab experiment They are also responsible for keeping a professional and accurate record of the lab. experiments in the lab manual wherever tables are provided Students should report any errors in the. lab manual to the teaching assistant, 1 2 Laboratory Teaching Assistant Responsibilities. The LTA shall be completely familiar with each lab prior to class The LTA shall provide the students. with a syllabus and safety review during the first class The syllabus shall include the LTA s office hours. telephone number and the name of the faculty coordinator The LTA is responsible for ensuring that. all the necessary equipment and or preparations for the lab are available and in working condition. Lab experiments should be checked in advance to make sure everything is in working order The LTA. should fully answer any questions posed by the students and supervise the students performing the lab. experiments The LTA is expected to grade the lab notebooks and reports in a fair and timely manner. The reports should be returned to the students in the next lab period following submission The LTA. should report any errors in the lab manual to the faculty coordinator. 1 3 Faculty Coordinator Responsibilities, The faculty coordinator should ensure that the laboratory is properly equipped i e that the teaching. assistants receive any equipment necessary to perform the experiments The coordinator is responsible. for supervising the teaching assistants and resolving any questions or problems that are identified by. the teaching assistants or the students The coordinator may supervise the format of the final exam for. the lab They are also responsible for making any necessary corrections to this manual and ensuring. that it is continually updated and available,1 4 Lab Policy and Grading. The student should understand the following policy. ATTENDANCE Attendance is mandatory and any absence must be for a valid excuse and must. be documented If the instructor is more than 15 minutes late students may consider lab for the day. LAB RECORDS The student must, 1 Keep all work in preparation of and obtained during lab and.
2 Prepare a lab report on experiments selected by the LTA. GRADING POLICY The final grade of this course is determined using the criterion detailed in the. In class work will be determined by the LTA who at their discretion using information and obser. vations of the students performing the lab The final exam will contain a written part and a practical. physical operations part, PRE REQUISITES AND CO REQUISITES The lab course is to be taken during the same. semester as ECE 2020 but receives a separate grade If ECE 2020 is dropped then ECE 2110 must. be dropped as well Students are required to have completed both MTHSC 108 and PHYS 122 with a. C or better grade in each Students are also assumed to have completed a programming class and be. familiar with the use of a computer based word processor. Note that the instructor reserves the right to alter any part of this information at. their discretion Any changes will be announced in class and distributed in writing to the. students prior to the changes taking effect,1 5 Course Goals and Objectives. The Electrical Circuits Laboratory I is designed to provide the student with the knowledge to use. basic measuring instruments and techniques with proficiency These techniques are designed to com. plement the concepts introduced in ECE 2020 In addition the student should learn how to record. experimental results effectively and present these results in a written report More explicitly the class. objectives are, 1 To gain proficiency in the use of common measuring instruments. 2 To enhance understanding of basic electric circuit analysis concepts including. Independent sources, Passive circuit components resistors capacitors inductors and switches. Ohm s law Kirchhoff s voltage law and Kirchhoff s current law. Power and energy relations,Thvenin s theorem and Norton s theorem.
Superposition,3 To develop communication skills through. Maintenance of succinct but complete laboratory notebooks as permanent written descriptions of. procedures results and analyses, Verbal interchanges with the laboratory instructor and other students. Preparation of succinct but complete laboratory reports. 4 To compare theoretical predictions with experimental results and to determine the source of any. apparent differences,2 Use of Laboratory Instruments. One of the major goals of this lab is to familiarize the student with the proper equipment and. techniques for making electrical measurements Some understanding of the lab instruments is necessary. to avoid personal or equipment damage By understanding the device s purpose and following a few. simple rules costly mistakes can be avoided,2 1 Ammeters and Voltmeters. The most common measurements are those of voltages and currents Throughout this manual the. ammeter and voltmeter are represented as shown in Figure 1. R IS VERY SMALL IDEALLY ZERO R IS VERY LARGE IDEALLY INFINITE. Figure 1 Ammeter and Voltmeter, Ammeters are used to measure the flow of electrical current in a circuit Theoretically measuring.
devices should not affect the circuit being studied Thus for ammeters it is important that their internal. resistance be very small ideally near zero so they will not restrict reduce the flow of current However. if the ammeter is connected across a voltage difference it will conduct a large current and damage the. ammeter Therefore ammeters must always be connected in series in a circuit never in. parallel with a circuit element High currents may also damage the needle on an analog ammeter. The high currents cause the needle to move too quickly hitting the pin at the end of the scale Always. set the ammeter to the highest scale possible then adjust downward to the appropriate. Voltmeters are used to measure the potential difference between two points Since the voltmeter. should not affect the circuit the voltmeters have very high ideally infinite impedance Thus the. voltmeter should not draw any current and not affect the circuit Given these requirements voltmeters. must be connected in parallel in a circuit never in series with a circuit element. In general all devices have physical limits These limits are specified by the device manufacturer and. are referred to as the device rating The ratings are usually expressed in terms of voltage limits current. limits or power limits It is up to the engineer to make sure that in device operation these ratings. limit values are not exceeded The following rules provide a guideline for instrument protection. 2 2 Instrument Protection Rules, 1 Set instrument scales to the highest range before turning on the power source. 2 Be sure instrument grounds are connected properly Avoid accidental grounding of hot leads. i e those that are above ground potential, 3 Check polarity markings and connections of instruments carefully before connecting power 4 Never. connect an ammeter across a voltage source Only connect ammeters in series with loads. 4 Do not exceed the voltage and current ratings of instruments or other circuit elements This. particularly applies to wattmeters since the current or voltage rating may be exceeded with the. needle still on the scale, 5 Be sure the fuse and circuit breakers are of suitable value When connecting electrical elements. to make up a network in the laboratory it is easy to lose track of various points in the network. and accidentally connect a wire to the wrong place A procedure to follow that helps to avoid. this is to connect the main series part of the network first then go back and add the elements in. parallel As an element is added place a small check by it on your circuit diagram Then go back. and verify all connections before turning on the power One day someone s life may depend upon. your making sure that all has been done correctly,3 Data Recording and Reports. 3 1 The Laboratory Notebook, Students must record their experimental values in the provided tables in this laboratory manual.
and reproduce them in the lab reports Reports are integral to recording the methodology and results. of an experiment In engineering practice the laboratory notebook serves as an invaluable reference. to the technique used in the lab and is essential when trying to duplicate a result or write a report. Therefore it is important to learn to keep accurate data Make plots of data and sketches when these. are appropriate in the recording and analysis of observations Note that the data collected will be an. accurate and permanent record of the data obtained during the experiment and the analysis of the. results You will need this record when you are ready to prepare a lab report. 3 2 The Lab Report, Reports are the primary means of communicating your experience and conclusions to other profes. sionals In this course you will use the lab report to inform your LTA about what you did and what you. have learned from the experience Engineering results are meaningless unless they can be communicated. to others You will be directed by your LTA to prepare a lab report on a few selected lab experiments. during the semester Your assignment might be different from your lab partner s assignment. Your laboratory report should be clear and concise The lab report shall be typed on a word processor. As a guide use the format on the next page Use tables diagrams sketches and plots as necessary. to show what you did what was observed and what conclusions you can draw from this Even though. you will work with one or more lab partners your report will be the result of your individual effort in. order to provide you with practice in technical communication. Formatting and Style,The lab report shall be typed in a word processor. All page margins must be 1 25 inches All content including text figures tables etc must fit. within the margins,Body text should be double spaced. Basic text should be in 12 point size in a commonly used text font. Set your main text justified with even left right margins. The first line of each paragraph should have a left indent. All the tables should have titles and should be numbered Tables should be labelled numerically. as Table 1 Table 2 etc Table captions appear above the table The column headings should be. labeled with the units specified, Graphs should be presented as figures All the figures should have titles and should be numbered. Figure captions appear below the figure Graphs should have labeled axes and clearly show the. scales and units of the axes, All the figures and tables must be centered on the page.
All the figures and tables in your report must be referenced in your discussion References to. figures in the main body of the text are usually written in abbreviated form e g see Fig 1<. This course is intended to enhance the learning experience of the student in topics encountered in ECE 2020 In this lab students are expected to get hands on experience in using the basic measuring devices used in electrical engineering and in interpreting the results of measurement operations in terms

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