Caliper

Considerations

  • Pre-Operation Checklist is a prerequisite for ANY operation.
  • Applies to Digital and Dial calipers (decimal, fractional, and metric) commonly found in the shop.
  • Tools are in working condition; capable of being properly zeroed out and will hold calibration.
  • Test examples are of appropriate size to be measured using the available tools.

Pre-Operation Checklist

Performance Standard –

Level 1

  • Verifies caliber reads “0” when jaws are touching.
  • Demonstrates understanding of all applicable controls and functions of the caliper(s) to be used for evaluation.
  • Handles caliper with care and stores properly with jaws not touching each other.

Level 2

  • Verifies calibration to a known standard.
  • Meets Level 1 performance standard.


Measure Thickness

Level 1

Given material with known thickness dimensions, and a caliper calibrated and ready to measure, record the thickness.
Performance Standard –

  • Accuracy of answer shall be ± 0.076 mm [0.003″].

Level 2

Given material with known thickness dimensions, and a caliper slightly out of adjustment (calibration), demonstrate ability to zero out the instrument, and record the thickness.
Performance Standard –

  • Demonstrates ability to zero out/calibrate the caliper.
  • Meets Level 1 performance standard.


Measure Depth

Level 1

Given material machined in any fashion to known depth dimensions, and a caliper calibrated and ready to measure, record the depth of each example.
Performance Standard –

  • Accuracy of answer shall be ± 0.076 mm [0.003″].

Level 2

Given material machined in any fashion to known depth dimensions, and a caliper slightly out of adjustment (calibration), demonstrate ability to calibrate the instrument, then record the depth of each example.
Performance Standard –

  • Demonstrates ability to zero out/calibrate the caliper.
  • Meets Level 1 performance standard.


Measure Inside Dimension

Level 1

Given material with known inside dimension, and a caliper calibrated and ready to measure, determine the inside dimension.
Performance Standard –

  • Accuracy of answer shall be ± 0.076 mm [0.003″].

Level 2

Given material with known inside dimension, and a caliper slightly out of adjustment (calibration), demonstrate ability to calibrate the instrument, then record the inside dimension.
Performance Standard –

  • Demonstrates ability to zero out/calibrate the caliper.
  • Meets Level 1 performance standard.


Measure Center Distance from Edge of Board

Level 1

Given material with known hole diameters, and a caliper calibrated and ready to measure, record the centerline distance from the hole to the edge of of each piece.
Performance Standard –

  • Accuracy of answer shall be ± 0.076 mm [0.003″].

Level 2

Given material with known hole diameters, and a caliper slightly out of adjustment (calibration), record the centerline distance from the hole to the edge of of each piece.
Performance Standard –

  • Demonstrates ability to zero out/calibrate the caliper.
  • Meets Level 1 performance standard.