1 / 91

Measurement Instruments &Tools

Measurement Instruments &Tools. Accurate Measurement. Objectives. What is an ‘accurate’ measurement Review different types of measuring instruments and their application Learn how to calibrate instruments Care and maintenance of instruments Advanced diagnostic session .

truong
Télécharger la présentation

Measurement Instruments &Tools

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Measurement Instruments &Tools Accurate Measurement

  2. Objectives • What is an ‘accurate’ measurement • Review different types of measuring instruments and their application • Learn how to calibrate instruments • Care and maintenance of instruments • Advanced diagnostic session 

  3. Why are these measuring devices called ‘instruments’

  4. Definition of Accurate(from dictionary) • free from error especially as the result ofcare • able to give an accurate result What happens if you do not measure accurately?

  5. Examples ofFailed Measurements

  6. YouTube - LS1 Blows Engine

  7. Name here

  8. Measuring Instruments • Micrometers • Vernier Calipers • Dial Indicators • Telescopic Gauges • Small Hole Gauges • Thickness Gauges • Straight Edge

  9. Outside Micrometer Instrument for making precise linear measurements of dimensions such as diameters, thicknesses, and lengths of solid bodies. It consists of a C-shaped frame with a movable jaw operated by a screw. The accuracy of the measurements depends on the accuracy of the screw-nut combination.

  10. Imperial and Metric

  11. Inside Micrometer

  12. Depth Micrometer

  13. Outside Micrometer Inside Micrometer Depth Micrometer Can you identify the metric micrometer ?

  14. Digital Micrometers

  15. Combination Digital Metric or Imperial at the push of a button

  16. Parts of a Micrometer

  17. Precision Instrument

  18. Micrometer Don’ts • Do not drop • Do not run over • Do not over tighten (it is not a vice) • Do not drop in chemicals • Do not leave it covered in grease • Do not let anyone borrow it • Do not leave lying around

  19. Micrometer Do’s • Keep clean • Keep calibrated • Keep in storage box • Keep locked up • Keep away from everyone • Keep in practice reading it !

  20. Using an Outside Micrometer

  21. Using a Depth Micrometer

  22. Using Inside Micrometer

  23. Brake Drum Micrometer Essentially it is a heavy duty Inside Micrometer

  24. Measuring a brake rotor What is the name of the micrometer in the picture?

  25. Steps to reading a micrometer • Calibrate unit • Identify scale (metric or imperial) • Identify range of micrometer (size) • Read Sleeve first number you see • Read Sleeve for second number (graduation) • Read Thimble Note-if it is a 4 digit mic, read last number on Sleeve (will discuss later)

  26. Step # 1 Calibrate Micrometer Before using any measuring instrument you must check to ensure it is calibrated (accurate) TGB Computing & Publishing YouTube - measuring the thickness of a block using a micrometer www.tgbcomputing.com

  27. Step # 2 Identify scale

  28. Step # 3 Identify Range (size)

  29. Where to find range Imperial equivalent would be a 0-1”

  30. Step # 4 Reading the Sleeve and Thimble Example shows 0.341 1 3 Number on Sleeve Number on Thimble Imperial Micrometer 2 Graduation on Sleeve Thimble numbers go from 0 to 20

  31. Sample Reading Example using a 0-1” Outside Micrometer First number is the size of the Mic 0.000 Second number is the first number on Sleeve .000 Third number is .025 graduations you see onSleeve .025 x 2 = .050 Fourth number is read on the Thimble .016

  32. Recording Measurement from Sample Reading • First reading – Range of Mic. 0 – 1” so the first number would be 0.000 • Second reading – number on Sleeve Number you see is Zero so it would be .000 • Third reading – graduation on Sleeve Two graduations exposed so number is .050 • Final number is number on the Thimble Final number is .016

  33. Total Readings • First reading – Range of Mic. 0.000 • Second reading – number on Sleeve 0.000 • Third reading – graduation on Sleeve 0.050 • Final number is number on the Thimble 0.016 • ______ 0.066 Total is ?

  34. Reading an Imperial Micrometer

  35. Reading an Imperial MicrometerExercise # 1 (2-3” mic) Answer : 2.550

  36. Reading an Imperial MicrometerExercise # 2 (0-1” mic) Answer: 0.802

  37. Reading an Imperial MicrometerExercise # 3 (1-2” mic) Answer: 1.645

  38. Reading a Metric Micrometer

  39. Reading a Metric Micrometer Notice that Thimble numbers are higher than the Imperial Mic ? That’s how you know it is Metric scale. Thimble numbers go from 0 to 45

  40. Example of 4 digit Metric Micrometer 0.0000

  41. Reading a Metric MicrometerExercise # 1 (0-25mm Range) Answer : 12. 69

  42. Reading a Metric MicrometerExercise # 2 (0-25mm Range) Answer : 23.99

  43. Telescopic Gauges • Spring loaded • Measure large inside dia.

  44. Using Telescopic Gauges

More Related