vernier caliper

Vernier Caliper Overview

  • Used for precise measurements (to thousandths of a cm).

  • Important for accurate readings to prevent errors in calculations.

Measurement Sections

  • Outer Dimensions (A): Measure width of blocks/rods.

  • Inner Dimensions (B): Measure diameter of holes.

  • Depth Measurements (C): Measure depth of holes.

Vernier Scale Details

  • Fixed Scale (D): Marked in 0.1 cm increments.

  • Sliding Scale (E): Has numbers marking 0.01 cm increments and small lines for 0.002 cm increments.

Measurement Steps

  1. Prepare for Measurement:

    • Loosen thumb screw clamp (F).

    • Ensure caliper fits snugly on the object.

  2. Tighten and Remove:

    • Tighten the clamp and remove the caliper without altering its position.

    • Use a ruler for a rough measurement if needed.

  3. Read the First Digit:

    • Look for the line below the first zero on the sliding scale.

    • Example: falls between 5.6 and 5.7 cm - start at 5.6 cm.

  4. Find Last Two Digits:

    • Identify the line on the sliding scale aligned with the fixed scale.

    • Example: if aligned with 0.044 cm, add to first measurement.

    • Final total: 5.6 + 0.044 = 5.644 cm.

Key Reminder

  • Last digit of the measurement will always be an even number using this vernier caliper.

  • Check measurements with a partner and consult instructor if confused.