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PRECISION DIMENSIONAL MEASUREMENT DESCRIPTION

Contents

Time Requirement
The approximate amount of time needed to complete this course is 6-8 hours.

Linear Measurements Standards
Definition of the Meter, Length Standards, Units of Measure

Measuring Instruments

Micrometers, Calipers, Types and Accuracies, Selection, Sensitivity, and Accuracy of Measuring Instruments, Absolute and Comparison Measure, Causes of Error and Correction: Temperature, Gage Deformation, Elastic Deformation, Error Analysis

Gage Blocks

History, Requirements, Methods of Measuring, Traceability, Uncertainty, Surface Finish, Thermal Expansion, Selection, Precautions, Calibration, Wringing, Types and Characteristics

Making Angular Measurements

Clinometers, Sine Bars and tables; Trigonometric functions, Practical applications; Angle gage blocks

Optical Instruments
Using the eye as an optical instrument, Hints for making precise optical measurements, Use and principles of Optical flats, Grades, Light Interferometry, Light Interference, Reflection, Calculating surface flatness using interference patterns, Reading flatness error, Care of optical measurement devices, Microscopes, Comparator


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