To measure the diameter of a small cylinder using Vernier callipers.
Vernier callipers, small cylinder
- Vernier scale should slide smoothly over the main scale. Apply machine oil or grease of required.
- The vernier constant and zero error should be carefully determined and recorded.
- The body should be gripped gently between the jaws without and undue pressure.
- Each observation should be recorded with correct significand figures and units.
- The jaws of the vernier callipers may not be perpendicular to the main scale.
- The vernier scale may be loose.
- The zero error of the instrument may not have been taken into account.
- Personal errors due to parallax and improper recording.