2. Objective of metrological control
The primary objective of metrological equipment is to be able to make a measurement with an uncertainty of use in line with the laboratory's needs, in order to ensure the quality of the analysis, test or calibration method implemented.
A thermal chamber at 37 ± 1°C will not be checked with a temperature measurement chain whose uncertainty of use is 1°C.
When a quantity (e.g. the temperature of an enclosure) needs to be controlled with a measuring instrument, the uncertainty of measurement associated with the use of the instrument, i.e. the expanded uncertainty associated with the measurement result obtained by this instrument, must be low in order to limit the zone of doubt, also known as the "guard band" (figure
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Objective of metrological control
Different types of equipment
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