# Dimensional Metrology Training

Designed for those who need to make dimensional measurements but are not necessarily trained metrologists. Upon completion, you should have gained a basic knowledge of fundamental good practice when making dimensional measurements. An introduction to length units and key issues such as traceability and uncertainty is followed by some examples of typical sources of error in length measurement. Checking to specification, accreditation and measurement techniques are also covered along with an introduction to optical measurement techniques.

Lesson 1 – Introduction

Topics:

• Units of Length measurement, Units of Angles, Resolution, Accuracy, Precision, Resolution, Uncertainty, Tolerance, Error

Learning Objectives:

• Identify various units of measurement.
• State the definitions key terms in Dimensional Metrology
• Explain the difference between various units of measurement.

Lesson 2 – Metric Measurement

Topics:

• Length, area, volume; Mass; Frequency; Speed and velocity; Acceleration; Force and weight; Work, energy, and power; Temperature; Current; Light

Learning Objectives:

• List the seven base units in the SI (metric) system. •Name three derived units.
• Define work and power in SI units. •Explain what power is and how it is measured.
• Name two metric measuring instruments and their equivalents.

Lesson 3 – Linear Measurement

Topics:

• Units; Measurement error; Tolerances; Scales and rules; Scribers and dividers; Bevel gauge; Calipers; Combination square; Using a micrometer

Learning Objectives:

• List five units used for making linear measurements. •Demonstrate how to use a micrometer and calipers •Explain what each head of a combination square is used for. •State the definition of parallax error. Define the different types of tolerance.

Lesson 4 – Comparison and Surface Measurement

Topics:

• Gauge blocks; Measuring screw threads, radius, surface texture; Hardness testing; Testing surface coatings; Detecting defects

Learning Objectives:

• Explain the difference between a continuous dial and a balanced dial on a dial indicator.
• State the definition of pitch on a screw.
• Name two hardness tests.
• Explain why nondestructive testing is preferable to destructive testing on surface coatings.

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