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THE OSCILLOSCOPE - REVISION

Demonstration through physical examples for the study of the Oscilloscope author: Teacher Engineer NICA MADALINA “ COSTIN NENITESCU “ HIGHSCHOOL FOR CHEMISTRY, ROMANIA Translated by Catalina Rinescu and Adriana Gaspar, english teachers.

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THE OSCILLOSCOPE - REVISION

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  1. Demonstration through physicalexamples for the study of the Oscilloscopeauthor:Teacher Engineer NICA MADALINA “ COSTIN NENITESCU “ HIGHSCHOOL FOR CHEMISTRY, ROMANIATranslated by Catalina Rinescu and Adriana Gaspar, english teachers

  2. DIDACTIC TECHNOLOGY PROJECTSUBJECT: Electrical and electronic measurements (1,5 h /week) FORM: XI -th HDATE: the 11st of May 2005LEARNING THEME: OscilloscopeLESSON THEME : Oscilloscope - revisionTYPE OF LESSON: Check-up of knowledgeLESSON GOAL: 1) Work principle 2) Block set-up 3) Description of frontal panel 4) Applications 5) ConclusionsOPERATING OBJECTIVES: 1) to specify the role of the oscilloscope 2) to present the work principle 3) to identify its component parts, following the block set-up 4) to specify the role of each part 5) to identify the parts of the frontal panel 6) to specify their connection to the constructive parts 7) to measure or to calculate various measures with the help of the oscilloscope METHODS -PROCEDURS: - demonstration – computer simulations - materials display - case study - euristic conversation - independent observation - explanationTEACHING AIDS: - blackboard, chalk - drawing - textbook - worksheet - computerBIBLIOGRAPHY: “ Electrical and electronic measurements” Eugenia Isac “ Electrical and electronic measurements” Dragos Cosma, Tatiana Balasoiu, InternetPLACE : AMA LaboratoryLENGTH: 50 min

  3. 1. WORK PRINCIPLE THE OSCILLOSCOPE - REVISION 2. BLOCK SET_UP 3. DESCRIPTION OF FRONTAL PANEL 4. APPLICATIONS

  4. THE OSCILLOSCOPE- REVISION 1. WORK PRINCIPLE

  5. THE OSCILLOSCOPE- REVISION 1. WORK PRINCIPLE

  6. THE OSCILLOSCOPE- REVISION 2. BLOCK SET-UP

  7. THE OSCILLOSCOPE- REVISION 2. BLOCK SET-UP

  8. THE OSCILLOSCOPE- REVISION 2. BLOCK SET-UP

  9. THE OSCILLOSCOPE- REVISION 2. BLOCK SET-UP

  10. THE OSCILLOSCOPE- REVISION 2. BLOCK SET-UP

  11. THE OSCILLOSCOPE- REVISION 2. BLOCK SET-UP

  12. THE OSCILLOSCOPE- REVISION 2. BLOCK SET-UP

  13. 1 THE OSCILLOSCOPE- REVISION 3. DESCRIPTION OF FRONTAL PANEL U t

  14. 3 4 2 THE OSCILLOSCOPE- REVISION 3. DESCRIPTION OF FRONTAL PANEL

  15. 5 THE OSCILLOSCOPE- REVISION 3. DESCRIPTION OF FRONTAL PANEL

  16. 6 THE OSCILLOSCOPE- REVISION 3. DESCRIPTION OF FRONTAL PANEL

  17. THE OSCILLOSCOPE- REVISION 3. DESCRIPTION OF FRONTAL PANEL

  18. 7 THE OSCILLOSCOPE- REVISION 3. DESCRIPTION OF FRONTAL PANEL

  19. 8 THE OSCILLOSCOPE- REVISION 3. DESCRIPTION OF FRONTAL PANEL

  20. T THE OSCILLOSCOPE- REVISION 4. APPLICATIONS 1) On the oscilloscope screen the wave shape is obtained as in: Sinusoidal signal

  21. T THE OSCILLOSCOPE- REVISION 4. APPLICATIONS T = 8 div 1 2 3 4 5 6 7 8

  22. 1 2 3 4 5 6 7 8 T THE OSCILLOSCOPE- REVISION 4. APPLICATIONS T = 8 div x 2 ms/div = 16 ms T = 8 div TIME / DIV 2

  23. THE OSCILLOSCOPE- REVISION 4. APPLICATIONS f = 1 / T f = 1 / 16 ms f = 1 / 16 x 10-3 f = 62.5 Hz T = 16 ms

  24. THE OSCILLOSCOPE- REVISION 4. APPLICATIONS 3,4 A = 3,4 div 3 2 1

  25. 3,4 3 2 1 THE OSCILLOSCOPE- REVISION 4. APPLICATIONS Umax = 3,4 div x 0.5 V/div = 1,7 V 0.5

  26. 3,4 Uef = Umax/ 2 = 1,7 V / 1,41 = 1,2 V 3 2 1 THE OSCILLOSCOPE- REVISION 4. APPLICATIONS Uvv = 2 Umax = 2 x 1,7 V = 3,4 V

  27. THE OSCILLOSCOPE- REVISION 4. APPLICATIONS 2) On the screen of an oscilloscope it is obtained forma the wave shape as in the figure: Continuous signal 2 1 A = 2 div U = 2 div x 0.5 V/div = 1 V 0.5

  28. THE OSCILLOSCOPE- REVISION 4. APPLICATIONS 3) On the screen of an oscilloscope it is obtained the wave shape as in the figure: Triangular signal U = 8 div x 0.5 V/div = 4 V 0.5

  29. THE OSCILLOSCOPE- REVISION 4. APPLICATIONS 4) On the screen of an oscilloscope it is obtained the wave shape as in the figure: Rectangular signal t= 4 div x 2 ms/div = 8 ms TIME / DIV 2

  30. THE OSCILLOSCOPE- REVISION 4. APPLICATIONS 5) Draw the shape of the oscillogram corresponding to the following values : Umax=0,4 V , for the VOLT/DIV switch in the position 0,1 V/div T=5 ms, for the TIME/DIV switch in the position 0,5 ms/div Umax = 0,4 V => 0,4 V / (0,1 V/div) = 4 div T = 5 ms => 5 ms / (0,5 ms/div) = 10 div

  31. THE OSCILLOSCOPE- REVISION 4. APPLICATIONS 6) Compare the oscillograms and identify which of the following are identical ,whether the positions of switches are as below. 1 2 3 4 0, 2 V/div 1 ms/div 2 V/div 2 ms/div 1 V/div 5 ms/div 5 V/div 0,5 ms/div Maximum tension Period

  32. THE OSCILLOSCOPE- REVISION WORKSHEET

  33. THE OSCILLOSCOPE- REVISION WORKSHEET

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