In main scale of a vernier callipers 1 cm divided into 10 equal divisions. The vernier scale has 10 equal division that correspond to 9 main scale divisions. The measured value by this calliper is;
2.82 cm
2.83 cm
2.87 cm
2.89 cm
10 MSD = 1 cm
1 MSD = 0.1 cm
10 VSD = 9 MSD ⇒ 1 VSD = 0.9 MSD
LC = 1 MSD (1 − 9/10) = 1/10 × 0.1 cm = 0.01 cm
TR = MSR + LC × VSR = 2.8 + 7 × 0.01 = 2.87 cm
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