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Calibration Glossary

Browse our glossary of calibration-related terminology.

Beamex / Dictionary

Type A evaluation (of uncertainty)

Type A evaluation of measurement uncertainty is the statistical analysis of actual measurement results to produce uncertainty values

Type B evaluation (of uncertainty)

Type B evaluation of measurement uncertainty includes any method except statistical analysis of actual measurement results.


Uncertainty is a property of a measurement result that defines the range of probable values of the measurand

Uncertainty budget

The systematic description of known un­cer­tain­ties relevant to specific meas­ure­ments or types of meas­ure­ments, categorized by type of measurement, range of measurement, and/or other applicable measurement criteria.


The unit under calibration or the unit under test – the instrument being calibrated.


Sub­stan­ti­ation by examination and provision of objective evidence that verified processes, methods, and/or procedures are fit for their intended use.


Con­firm­a­tion by examination and provision of objective evidence that specified re­quire­ments have been fulfilled.


An acronym commonly used to identify the ISO In­ter­na­tion­al Vocabulary of Basic and General Terms in Metrology.

Work Instruction

In a quality management system, a work instruction defines the detailed steps necessary to carry out a procedure. Work in­struc­tions are used only where they are needed to ensure the quality of the product or service.