Page 64 - CITS - Fitter - Trade Theory

FITTER - CITS

49 main scale division are divided into 50 Vernier scale division So division = 49 mm on main scale
Hence 49/50 = 0.98
1 division Vernier scale = 0.98mm 1×49/50 = 49×2/50×2 98/100 = 0.02mm
Safety precaution

1 Proper handling: Handle the caliper with care to avoid dropping or mishandling, which could damage the
delicate measuring surfaces and affect accuracy.
2 Keep clean: Ensure that the measuring faces of the caliper are clean and free from debris, dust, or oil
residues, as these can interfere with accurate measurements.
3 Avoid excessive Force: Do not apply excessive force when closing the jaws of the caliper around an object.
Use gentle pressure to prevent damaging the measuring faces and ensure accurate readings.
4 Avoid overextension: Avoid overextending the jaws of the caliper beyond their intended range, as this could
lead to damage or misalignment of the measuring surfaces.
5 Use correct technique: Use the correct technique when taking measurements to ensure accuracy. Make
sure the object being measured is properly aligned and seated between the jaws of the caliper.

6 Avoid abrasive surfaces: Avoid measuring rough or abrasive surfaces that could damage the measuring
faces of the caliper. Use protective measures such as a surface plate or protective film if necessary.
7 Store properly: Store the caliper in a protective case or pouch when not in use to prevent damage and
contamination. Avoid storing it in areas with high humidity or temperature fluctuations.
8 Regular maintenance: Periodically inspect the caliper for signs of wear, damage, or misalignment. Clean and
lubricate the moving parts as needed to ensure smooth operation and accurate measurements.

9 Use personal Protective Equipment (PPE): Depending on the application, wear appropriate PPE such as
safety glasses or gloves to protect against potential hazards.
10 Training: Ensure that operators are properly trained in the use of the caliper and understand the safety
precautions and procedures. Regular training and refresher courses can help reinforce safe practices.

Vernier height gauge

• Introduction of vernier height gauge and its parts
A Vernier height gauge is a precision measurement tool used to measure vertical distances or heights with a high
degree of accuracy. It consists of several key parts, each playing a crucial role in its functionality. Here are the
main parts of a Vernier height gauge.

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CITS : CG & M - Fitter - Lesson 10