MEASUREMENT II
MEASUREMENT II.
Measuring length using vernier callipers.
Vernier callipers is used when higher accuracy in measurement is required and this cannot be done using a metre rule.
Vernier callipers has two scales; main scale and vernier scale. Outside jaws are used to measure both lengths and external diameters, inside jaws for measuring internal diameters while the tail is used for measuring depths of cavities .