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Calibration Glossary

Browse our glossary of calibration-related terminology.

Beamex / Dictionary

Ac­cred­it­a­tion (of a laboratory)

Formal recognition by an ac­cred­it­a­tion body that a calibration or testing laboratory is able to competently perform the cal­ib­ra­tions or tests listed in the ac­cred­it­a­tion scope document

Ac­cred­it­a­tion body

An or­gan­iz­a­tion that conducts laboratory ac­cred­it­a­tion evaluations in conformance to ISO Guide 58

Ac­cred­it­a­tion certificate

Document issued by an ac­cred­it­a­tion body to a laboratory that has met the conditions and criteria for ac­cred­it­a­tion

Ac­cred­it­a­tion criteria

Set of re­quire­ments used by an accrediting body that a laboratory must meet in order to be accredited

Accuracy (of a measurement)

Accuracy is a qualitative indication of how closely the result of a measurement agrees with the true value of the parameter being measured.

Accuracy (of a measuring instrument)

Accuracy is a qualitative indication of the ability of a measuring instrument to give responses close to the true value of the parameter being measured.


Software installed on a defined platform/hardware providing specific func­tion­al­ity.


Examination typically performed on-site of a testing or calibration laboratory to evaluate its conformance to conditions and criteria for ac­cred­it­a­tion.

Bespoke/Customized com­pu­ter­ised system

A com­pu­ter­ised system in­di­vidu­ally designed to suit a specific business process.

Best measurement capability

The best measurement capability for a particular quantity is the smallest uncertainty of measurement a laboratory can achieve within its scope of ac­cred­it­a­tion


Bias is the known systematic error of a measuring instrument.


It is the process of verifying the capability and performance of an item of measuring and test equipment by comparison to traceable measurement standards.

Calibration activity or provider

A laboratory or facility – including personnel – that perform cal­ib­ra­tions in an established location or at customer location(s).

Calibration certificate

A calibration certificate is generally a document that states that a specific item was calibrated by an or­gan­iz­a­tion.

Calibration curve

A calibration curve is a graphical il­lus­tra­tion that represents the re­la­tion­ship between a known, accurate input and the measured output of an instrument, thereby visually depicting calibration results. Calibration curves are typically constructed by measuring a known value of a process variable, then plotting the measured value against the true value. The resultant curve can

Calibration procedure

A calibration procedure is a controlled document that provides a validated method for evaluating and verifying the essential performance char­ac­ter­ist­ics, spe­cific­a­tions, or tolerances for a model of measuring or testing equipment.

Calibration program

A calibration program is a process of the quality management system that includes management of the use and control of calibrated inspection, and test and measuring equipment (IM&TE), and the process of calibrating IM&TE used to determine conformance to re­quire­ments or used in supporting activities.

Calibration report

A calibration report is a document that provides details of the calibration of an item.

Calibration seal

A calibration seal is a device, placard, or label that, when removed or tampered with, and by virtue of its design and material, clearly indicates tampering.

Calibration standard

A calibration standard is an IM&TE item, artifact, standard reference material, or measurement transfer standard that is designated as being used only to perform cal­ib­ra­tions of other IM&TE items.