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Instrumental drift
Instrumental drift is continuous incremental change over time in indication, due to changes in metrological properties of a measuring instrument.
Calibration
Calibration, operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties
Metrological traceability
Metrological traceability, property of a measurement result whereby the result can be related to a reference through a documented unbroken
Indication
Most measurements are based on indications provided by measuring instruments or measuring systems. An indication (e.g. an instrument signal or
Primary reference measurement procedure
Primary reference measurement procedure used to obtain a measurement result without relation to a measurement standard for a quantity of
Preliminary to making a measurement
Before making a measurement, the quantity must be clearly defined, bearing in mind the purpose for which the experimental result
International System of Quantities
International System of Quantities is that system of quantities based on the seven base quantities: length, mass, time, electric current,
System of quantities
System of quantities , set of quantities together with a set of non-contradictory equations relating those quantities. In practice, it
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This site was founded to provide updated and specialized information in the field of quality management systems and to share my experiences in the field of conformity assessment and promotion of this scienc
mohammad ghaaemi
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