Concepts and basic instrumentation: voltage, current, energy, power, multimeters and current clamps. Measures in direct and alternating current. Accuracy of the measures. Calibration and periodic checks of the instrumentation. (Complete program -> https://drive.google.com/file/d/0ByetXXea2mm1UnRKQkthZTZDbjA/view?usp=sharing)
Guide to laboratory exercises and spreadsheets (Available online -> https://drive.google.com/drive/folders/0ByetXXea2mm1Um9aUlhBS3hLdDA?usp=sharing)
Learning Objectives
The course I Electrical Engineering Laboratory aims to train the student on the practical basic aspects related to the understanding of the measurement methods of the main electrical quantities both in direct current and in alternating current, as well as providing adequate knowledge on the procedures for the evaluation of measurement uncertainty and for the correct management, verification and calibration of the instrumentation. The preparation of the group technical report, required for access to the final exam, will allow the student to refine the following transversal skills:- technical communication in writing (drafting reports and individual reports)
- group work in coordinated mode
-development of an appropriate technical expression and discussion of own arguments
-presentation and graphic communication (drawing up of diagrams, graphs and tables)
-understanding of technical standards
-conduction of bibliographic research through the main resources (libraries, scientific databases, etc.)
-respect commitments and time
-communication through presentations and Web systems
Prerequisites
Electrical
Teaching Methods
The course takes place over 27 hours, in 10 weeks of which: 6 hours of lectures and 21 hours of laboratory exercises
Further information
The calendar of exam sessions is published on the University system.
Type of Assessment
During the course of the course some laboratory exercises will be carried out for which the drafting of a technical group report will be requested, drawn up according to a specific outline provided by the teacher. Through the report the student must demonstrate the correct knowledge and understanding of the phenomena detected, highlighting, where present, critical elements and proposing the consequent improvement suggestions, as described in the training objectives. For each exercise the following items must be developed: a) Purpose of the exercise b) Description of the methodology (s) used (for example: direct connection, volt-amperometric method, etc.) c) List of instruments used and wiring diagrams d) Display of results in tabular and / or graphic form. e) Final conclusions with reference to the purpose of the exercise (point a), supplemented by any personal observations, such as: adequacy of the documentation / support provided, overall satisfaction, suggestions for improvement, etc. During the exam, the student will explain the whole report in a general and concise way, and then deepen in detail the parts requested by the teacher.
Course program
1) Concepts and basic instrumentation: - Energy and Power: general concepts - Concepts of resistance, voltage and electric current - Use of multimeters for the measurement of: voltage, current, resistance and power in direct current - Practical exercises related to measurements in direct current: - A1 Resistance measurement - A2 Conductor length - A3 Water conductivity - A4 Incandescent lamps - A5 LED lamps 2) Alternating current measurements: - Theoretical concepts on alternate functions - Power in sinusoidal circuits - Circuits with alternating currents non-sinusoidal - Measurements in alternating current systems - Measurement of electric current - Measurement instrumentation - Practical exercises (A6) 3) Measurement accuracy and instrumentation management: - Instrumental errors and measurement uncertainty - Instrumentation management - Practical exercise related to uncertainty assessment (A7) 4) Calibration, metrological confirmation and periodic checks of the instrumentation: - Metrological confirmation and calibration - Practical exercise on the calibration of instrumentation with sample instrument (A8) - Periodic checks with independent instruments - Practical exercise on instrumentation verification with independent instruments (A9) 5) Lighting and temperature: - Luxmeter : electrical energy conversion into light energy and operating principle - Contact thermometers: operating principle - infrared cameras and thermometers: operating principle and typical applications.