# Micrometer Vernier caliper

## Presentation on theme: "Micrometer Vernier caliper"— Presentation transcript:

Micrometer Vernier caliper
EXPERIMENT # 1 PRECISE MEASUREMENTS Micrometer Vernier caliper

Objectives: To determine the diameter of a metal ball and the length of the cube using VERNIER CALIPER. To measure the diameter of the wire using MICROMETER.

VERNIER CALIPER

PARTS OF A VERNIER CALIPER
1 - Outside jaws: used to take external measures of objects 2 - Inside jaws: used to take internal 3 - Depth probe: used to measure the depth of objects 4 - Main scale (cm & inch) 5 - Vernier Scale 6 - Retainer: used to block movable part

Measuring Using the Vernier:
Keep the body to be measured between the fixed jaw and mobile jaw Without pressure on it. Take the main scale reading. The division of the vernier that coincides with any division on the main scale is also 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 Divisions on the Vernier Scale The units of measurement is in millimeters (mm).

For vernier caliper: Total reading = MSR + (VSR x LC) MSR = Main Scale Reading VSR = Vernier Scale Reading LC = Least Count MSR = 2.7cm x 10 = 27mm VSR = 1(5) = 5 x 0.02 mm = 0.1mm Total Reading = 27.1 mm

Electronic vernier calipers are also available The procedure for taking measurements remains the same.

MSR = .9 cm x 10 = 9 mm VSR =3.6(5) = 18 x 0.02 mm = .36 mm Total Reading = 9.36 mm

MSR = ______________________________
VSR = ______________________________ Total Reading = _______________________

MSR VSR 1 2 3 MSR VSR 1 2 3 Dimension Dimension MEAN THICKNESS
Trial No. MSR VSR TOTAL =MSR + (VSR X LC) CORRECTED READING MEAN THICKNESS THICKNESS OF THE CUBE 1 2 3 Dimension Trial No. MSR VSR TOTAL =MSR + (VSR X LC) CORRECTED READING MEAN DIAMETER DIAMETER OF THE BOB 1 2 3

SCREW GAUGE/ MICRO METER
Micrometer: Is a tool designed to measure the thickness of an object

 MEASURING USING THE MICROMETER:
1. Keep the object between the measuring jaws. 2. Bring the measuring jaws together by turning the screw until the object is clamped and the thickness to be read no longer changes. 3. Take the main reading and the head scale reading.

For micrometer: Total reading = MSR + (HSR x LC) MSR = Main Scale Reading HSR = Head Scale Reading LC = Least Count QUESTION 1 MSR = 7 mm HSR = 0 x 0.01 mm = 0 mm Total Reading = 7 mm

QUESTION 2 MSR = 8 mm HSR = 12 x 0.01 mm = 0.12 mm Total Reading = 8.12 mm

QUESTION 3 MSR = __________________________
HSR = __________________________ Total Reading = ___________________

Electronic screw gauge is also available
Electronic screw gauge is also available. The procedure for taking the measurements remains the same

PSR HSR PSR HSR Dimension Dimension MEAN THICKNESS MEAN DIAMETER
Trial No. PSR HSR TOTAL =PSR + (HSR X LC) CORRECTED READING MEAN THICKNESS THICKNESS OF THE LENSE Dimension Trial No. PSR HSR TOTAL =MSR + (VSR X LC) CORRECTED READING MEAN DIAMETER DIAMETER OF WIRE

Conclusion: The diameter of the metal ball is _____________ The length of the cube is ____________. The diameter of the wire is ____________.

Similar presentations