Lab_2_Vernier_Caliper_Instructions

Lab_2_Vernier_Caliper_Instructions - ME 3023 Measurements...

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ME 3023 Measurements in Mechanical Systems Vernier Caliper Instructions LAB # 2 1 Background Vernier calipers are so-named due to their use of a vernier scale in order to improve scale readability as shown in Figure 1 1. Without the vernier scale, the limiting resolution of the linear scale on the caliper would be 0.025”; with the scale, this improves to 0.001”. Figure 1: Parts of a typical vernier caliper The numbers represent following: 1. Outside jaws: used to measure external diameter or width of an object 2. Inside jaws: used to measure internal diameter of an object 3. Depth probe: used to measure depths of an object or a hole 4. Main scale: gives measurements of up to one decimal place (in cm). 5. Main scale: gives measurements in fraction (in inch) 6. Vernier gives measurements up to two decimal places (in cm) 7. Vernier gives measurements in fraction (in inch) 8. Retainer: used to block movable part to allow the easy transferring a measurement The above vernier caliper contains both English and Metric scales, and has a measurement range of 0 to 6 inches. Only the instructions for use of the English scale are covered here; the use of the Metric scale is similar.
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