Criteria determining whether or not measuring equipment is compliant with a prescription guideline. The criteria should be specified in the context of the customer / supplier relationship.
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Adjustment set of operations carried out on a measuring system so that it provides prescribed indications corresponding to given values of a quantity to be measured. Adjustment of a measuring system should not be confused with calibration, which is a prerequisite for adjustment. After an adjustment of a measuring system, the measuring system must usually be recalibrated.
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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.
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Ratio that makes it possible to estimate the ability of metrological process to guarantee measurement results within the indicated tolerance limits.
R = (maximum permissible measurement error (MPE)) / measurement uncertainty
Maintenance performed after detection of a problem to fix property so that it can carry out the required functionalities.
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Preventive maintenance: maintenance performed in predetermined intervals or according to identified criteria in order to reduce the risk of failure and the degradation of the proper functioning of property.
Corrective maintenance: maintenance performed after detection of a problem to fix property so that it can carry out the required functionalities.
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Set of correlated or interactive elements, which are necessary to establish metrological compliance and continuous assessment of measurement processes.
Set of operations to determine the value of a quantity.
Realization of the definition of a given quantity, with stated quantity value and associated measurement uncertainty, used as a reference.
A measurement standard is frequently used as a reference in establishing measured quantity values and associated measurement uncertainties for other quantities of the same kind, thereby establishing metrological traceability through calibration of other measurement standards, measuring instruments, or measuring systems.
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Measuring instrument, software, measurement standard, reference material or auxiliary apparatus, or a combination thereof, necessary to realize a measurement process.
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Distinguishing feature, which can influence measurement results. Measuring equipment usually has several metrological characteristics, which can be calibrated.
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Set of operations required to ensure that measuring equipment conforms to the requirements for its intended use. Metrological confirmation generally includes calibration and verification, any necessary adjustment or repair, and subsequent recalibration, comparison with the metrological requirements for the intended use of the equipment, as well as any required sealing and labelling. Metrological confirmation is not achieved until and unless the fitness of the measuring equipment for the intended use has been demonstrated and documented. The requirements for intended use include such considerations as range, resolution and maximum permissible errors.
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A metrological domain groups metrological quantities of the same kind. The domain "Temperature / Humidity / Pyrometry / Infrared" includes thermometers, thermocouples, hygrometers, thermo-hygrometers, pyrometers and climatic chambers. The domain "Electrical measurement / magnetism" covers voltmeters, ammeters, impedance meters, wattmeters, multimeters, etc.
Measurement standard designated for the calibration of other measurement standards for quantities of a given kind in a given organization or at a given location.
Action on a product that is non-compliant in order to make it acceptable for intended use. The repair actions include corrective actions to re-establish its use as an initially compliant product in, for example, the case of a maintenance operation.
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Provision of objective evidence that a given item fulfils specified requirements. The item may be, e.g. a process, measurement procedure, material, compound, or measuring system. The specified requirements may be, e.g. that a manufacturer's specifications are met.
