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The use of the vernier scale is shown on a vernier caliper which measures the internal and the external diameters of an object. The vernier scale is constructed so that it is spaced at a constant fraction of the fixed main scale. So for a vernier with a constant of 0.1, each mark on the vernier is spaced 9/10 of those on the main scale.
Exactly -- that's why I argue that the focus of this image is on using the vernier scale. Otherwise, why devote so much time to marking off the lines and showing the total size of it? If you want an animation to show how to use a caliper, perhaps it shouldn't be a vernier caliper. howch e ng 17:10, 13 November 2006 (UTC)
The calipers in the diagram show a primary reading on the metric scale of about 2.475 cm (2.4 cm read from the main scale plus about 0.075 cm from the vernier scale). Calipers often have a "zero point error": meaning that the calipers do not read 0.000 cm when the jaws are closed.
English: Illustration of a vernier caliper. The caliper is showing a measurement of 2.475 cm ± 0.005 cm. Legend: Outside jaws: used to measure external length; Inside jaws: used to measure internal length; Depth probe: used to measure depth; Main scale (cm) Main scale (inch) Vernier (cm) Vernier (inch) Retainer: used to block/release movable part
Vernier micrometer reading 5.783 ± 0.001 mm, comprising 5.5 mm on main screw lead scale, 0.28 mm on screw rotation scale, and 0.003 mm added from vernier. Some micrometers are provided with a vernier scale on the sleeve in addition to the regular graduations. These permit measurements within 0.001 millimetre to be made on metric micrometers ...
Both vernier reading to 0.01mm or 0.02mm. Microscope tube consists of 10x Eyepice and 15mm or 50mm or 75mm objectives. The microscope, with its rack and pinion attachment, is mounted on a vertical slide, which also runs with an attached vernier along the vertical scale. The microscope is free to rotate n vertical plane.