1. Residential Audio & Video Systems Copyright © 2005 Heathkit Company, Inc. All Rights Reserved Presentation 3 – Using the Multimeter

2. 2 Objectives At the end of this presentation, you will be able to:

3. 3 Demonstrate the proper method of measuring DC and AC voltages. Demonstrate the proper method of measuring resistance and checking continuity. Demonstrate the proper method of measuring current.

4. 4 Becoming Familiar with the Digital Multimeter.

5. 5 DC AC V  OFF 1000 200 20 2 200 m 20M 2M 200 k 20 k 2k 200 A µ 20m 2m 200m 10A V V  COMmA 10A

6. 6 DC AC V  OFF 1000 200 20 2 200 m 20M 2M 200 k 20 k 2k 200 A µ 20m 2m 200m 10A V V  COMmA 10A Display Function/ Range Switch Input Terminals

7. 7 3-1/2 Digit Display

8. 8 Range and Function Switch DC AC V  OFF 1000 200 20 2 200 m 20M 2M 200 k 20 k 2k 200 A µ 20m 2m 200m 10A

9. 9 Input Terminals V V  COMmA 10A

10. 10 Measuring an AC Voltage

11. 11 AC/DC Switch DC AC V  OFF 1000 200 20 2 200 m 20M 2M 200 k 20 k 2k 200 A µ 20m 2m DC AC 200m 10A

12. 12 Set the Voltage Range DC AC V  OFF 1000 200 20 2 200 m 20M 2M 200 k 20 k 2k 200 A µ 20m 2m 200m 10A

13. 13 When measuring an unknown voltage, set the meter to its highest voltage range.

14. 14 Position of leads when measuring voltage. V V  COMmA 10A

15. 15

16. 16

17. 17 Measuring a DC Voltage.

18. 18 Set the AC/DC Switch to DC. DC AC V  OFF 1000 200 20 2 200 m 20M 2M 200 k 20 k 2k 200 A µ 20m 2m DC AC 200m 10A

19. 19 Set the Voltage Range to 20. DC AC V  OFF 1000 200 20 2 200 m 20M 2M 200 k 20 k 2k 200 A µ 20m 2m 200m 10A

20. 20 Position the test leads for measuring voltage. V V  COMmA 10A

21. 21 P9P8 -12 V Ground

22. 22 P9P8 Back Probing the Connector

23. 23

24. 24 Measuring Resistance.

25. 25 When using the Ohmmeter, remove power from the circuit under test.

26. 26

27. 27

28. 28 Disconnect Leads 8 Ohms

29. 29 Setting the Resistance Range. DC AC V  OFF 1000 200 20 2 200 m 20M 2M 200 k 20 k 2k 200 A µ 20m 2m 200m 10A

30. 30 Position of leads when measuring resistance. V V  COMmA 10A

31. 31

32. 32

33. 33 Measuring Current.

34. 34 Measuring current is inconvenient because you must break the circuit you wish to test.

35. 35 P9P8 -12 V

36. 36 Set the AC/DC Switch to DC. DC AC V  OFF 1000 200 20 2 200 m 20M 2M 200 k 20 k 2k 200 A µ 20m 2m DC AC 200m 10A

37. 37 Set the Current Range. DC AC V  OFF 1000 200 20 2 200 m 20M 2M 200 k 20 k 2k 200 A µ 20m 2m 200m 10A

38. 38 Move the red lead to the low current terminal. V V  COMmA 10A

39. 39 P9P8 Break the circuit.

40. 40 P9P8

41. 41 P9P8 Insert the ammeter.

42. 42 Read the current.

43. 43 P9P8 Restore the circuit.

44. Residential Audio & Video Systems Copyright © 2005 Heathkit Company, Inc. All Rights Reserved End