QIMT Glossary
Definitions of Metrology terms & phrases.
If you know of a term or phrase that belongs here, you can submit the term or phrase and associated definition by adding an entry. NOTE: All entries are reviewed and approved prior to being seen by others on the site.
Procedure for adding a Definition:
- Click on the "Add a New Entry" button.
- Under the first required field labeled 'Concept', enter the Metrology word or term.
- In the 'Description' Field, put the definition, don't forget to use the "DeWord" button to remove MS Word formatting if you are copying and pasting from MS Word; see lounge forum for note regarding this issue.
- Ignore the other entries and submit.
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Browse the glossary using this index
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Random error Result of a measurement minus the mean that would result from an infinite number of measurements of the same measurand carried out under repeatability conditions. | |
Reference conditions Conditions of use prescribed for testing the performance of a measuring instrument or for the intercomparison of results of measurements. | |
Reference material (CRM), certified Reference material, accompanied by a certificate, which has one or more properties whose value is certified by a procedure that establishes traceability to the accurate realisation of the unit in which the values of the properties are expressed, and for which each certified value is accompanied by a stated uncertainty with a given level of confidence. | |
Reference material (RM) Material or substance one or more of whose property values are sufficiently homogenous and well established to be used for the calibration of an apparatus, the assessment of a measurement method, and for assigning values to materials. | |
Reference material, primary Reference material that has the highest metrological qualities and whose value is determined by the use of a primary method. | |
Reference values Normally part of the reference conditions of an instrument. See also Values, determined. | |
Relative error Error of measurement divided by a true value of the measurand. | |
Repeatability (of a measuring instrument) The ability of a measuring instrument to give, under defined conditions of use, closely similar responses for repeated applications of the same stimulus. | |
Repeatability (of results of measurements) Closeness of the agreement between the results of successive measurements of the same measurand carried out under the same conditions of measurement. | |
Repressive measure (opposite of preventive measure) used in market surveillance to reveal any illegal usage of a measuring instrument. | |
Reproducibility (of results of measurements) Closeness of agreement between the results of measurements of the same measurand carried out under changed conditions of measurement. | |
Response The input signal for a measuring system can be called a stimulus and the output signal can be called a response. | |
Result, corrected Measuring result after correction for systematic error. | |
RMO Regional Metrology Organisation | |