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Calibration, operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication.

Calibration in chemical analysis is frequently associated with calibrating a measuring instrument or measuring system. Typical features of these are:
 they contain chromatographic and/or spectrometric equipment;
 they need frequent (daily, weekly, monthly) calibration;
 the indication, i.e. the signal from the instrument or system, corresponds to a quantity other than that intended to be measured, e.g. an electric charge or potential, rather than amount-ofsubstance concentration or mass fraction.
The VIM 3 definition is divided into two parts, Figure 2 illustrates the the first part as a calibration diagram.

ref: Terminology in Analytica Measurement Introduction to VIM 3

Post Author: ghaemi mohammad

This site has been established 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 and promotion of this science.

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