Metrological validation is the set of operations required to ensure that a measurement device meets the requirements for its intended use.
The concept requires the following points to be noted:
(1) Metrological validation typically includes: calibration and verification, various necessary adjustments or repairs and subsequent recalibration, comparison with the metrological requirements for the intended use of the equipment, and required seals and labels (condition identification).
(2) Metrological confirmation is only complete when the measurement equipment has been proven suitable for its intended use and documented.
(3) Requirements for intended use include: measurement range, resolving power, maximum allowable error, and so on.
(4) Measurement requirements are usually different from product requirements and are not specified in product requirements. The concept of measurement confirmation refers to a series of activities such as calibration, adjustment, repair, verification, sealing and labeling of measuring equipment, including, of course, calibration, comparison and other work. Its purpose is: to ensure that the measurement equipment is in a state that meets the needs of the use of the activities carried out. As all measuring equipment in use with the changes in time will occur offset, can not always be maintained in a certain error, in order to make them maintain the original accuracy, they must be used after a certain period of time for calibration, debugging or repair, recalibration, sealing and labeling, etc., through these activities, so that the measuring equipment in a fairly long period of time to maintain to meet the expected use of the required degree of accuracy.
From the definition, it can be seen that metrological confirmation is an activity carried out with respect to the requirements of measurement equipment and its implementation.