Abbreviation |
Elaboration |
Calibration |
A set of operations that establish, under specified conditions, the relationship between values of quantities indicated by a measuring system, or values represented by a material measure or a reference material, and the corresponding values realized by standards |
Conformity |
Fulfillment by a product, process, or service of specified requirements |
Conformity assessment |
An activity concerned with determining directly or indirectly that relevant requirements are fulfilled |
International standard |
Standard recognized by an international agreement to serve internationally as the basis for assigning values to other standards of the quantity concerned |
International System of Units (SI) |
The units of the metric system used universally in science |
Legal metrology |
Legal metrology comprises all measurements carried out for any legal purpose and includes measurements that are subject to regulation by law or government decree |
Measurement |
A set of operations having the object of determining a value of a quantity |
Metre Convention |
The Metre Convention is an international treaty that provides the basis of all international agreements on units of measurement |
Metrology |
The science of measurement |
National standard |
Standard recognized by a national decision to serve, in a country, as the basis for assigning values to other standards of the quantity concerned |
Pattern approval |
Examination of the pattern (design) of a measuring instrument against national or international specifications |
Primary standard |
A standard that is designated or widely acknowledged as having the highest metrological qualities and whose value is accepted without reference to other standards of the same quantity |
Reference material |
A material or substance one or more of whose property values are sufficiently homogeneous and well established to be used for the calibration of an apparatus, the assessment of a measurement method, or for assigning values to materials |
Reference standard |
A standard generally having the highest metrological quality available at a given location or in a given organization from which measurements made there are derived |
Secondary standard |
A standard whose value is assigned by comparison with a primary standard of the same quantity |
Traceability |
Traceability is the property of the result of a measurement or the value of a standard whereby it can be related to stated references, usually national or international standards, through an unbroken chain of comparisons all having stated uncertainties |
Verification by sampling |
Verification of a homogeneous batch of measuring instruments based on the results of examination of a statistically appropriate number of specimens selected at random from an identified lot |
Verification of a measuring instrument |
Procedure (other than pattern approval) which includes the examination and marking and/or issuing of a verification certificate, that ascertains and confirms that the measuring instrument complies with the statutory requirements |
Working standard |
A standard that is used routinely to calibrate or check material measures, measuring instruments, or reference materials |
Accreditation |
Authorization, approval, or recognition of meeting a standard |