4 PARTS OF A VERNIER CALIPER 1 - Outside jaws: used to take externalmeasures of objects2 - Inside jaws: used to take internal3 - Depth probe: used to measure the depthof objects4 - Main scale (cm & inch)5 - Vernier Scale6 - Retainer: used to block movable part
5 Measuring Using the Vernier: Keep the body to be measured between the fixed jaw and mobile jawWithout pressure on it.Take the main scale reading.The division of the vernier that coincides with any division on the main scale isalso noted. This is the vernier scale reading.Then, the measurement of the object will be= Main scale reading + (vernier scale reading x least count)Here,Least count = Value of One Main Scale Division / Total Number of Divisionson the Vernier ScaleThe units of measurement is in millimeters (mm).
6 For vernier caliper:Total reading = MSR + (VSR x LC)MSR = Main Scale ReadingVSR = Vernier Scale ReadingLC = Least CountMSR = 2.7cm x 10 = 27mmVSR = 1(5) = 5 x 0.02 mm = 0.1mmTotal Reading = 27.1 mm
7 Electronic vernier calipers are also available The procedure for taking measurements remains the same.
8 MSR = .9 cm x 10 = 9 mmVSR =3.6(5) = 18 x 0.02 mm = .36 mmTotal Reading = 9.36 mm
13 MEASURING USING THE MICROMETER: 1. Keep the object between the measuring jaws.2. Bring the measuring jaws together by turningthe screw until the object is clamped and thethickness to be read no longer changes.3. Take the main reading and the head scalereading.
14 For micrometer:Total reading = MSR + (HSR x LC)MSR = Main Scale ReadingHSR = Head Scale ReadingLC = Least CountQUESTION 1MSR = 7 mmHSR = 0 x 0.01 mm = 0 mmTotal Reading = 7 mm
15 QUESTION 2MSR = 8 mmHSR = 12 x 0.01 mm = 0.12 mmTotal Reading = 8.12 mm
17 Electronic screw gauge is also available Electronic screw gauge is also available. The procedure for taking the measurements remains the same
18 PSR HSR PSR HSR Dimension Dimension MEAN THICKNESS MEAN DIAMETER Trial No.PSRHSRTOTAL=PSR + (HSR X LC)CORRECTED READINGMEAN THICKNESSTHICKNESS OF THE LENSEDimensionTrial No.PSRHSRTOTAL=MSR + (VSR X LC)CORRECTED READINGMEAN DIAMETERDIAMETER OF WIRE
19 Conclusion:The diameter of the metal ball is _____________The length of the cube is ____________.The diameter of the wire is ____________.