A traceability scheme for materials metrology

A schematic traceability chain is proposed similar to the traceability scheme in chemical measurements, in which calibration hierarchy is established by consecutive sets of three components, namely measurement standard, measurement system and measurement procedure. The calibration hierarchy is established among sets of measurement levels, which are characterized by the associated uncertainty that is assigned or achieved to the value assignment process or calibration provided. By taking particle size measurements as an example, a scheme of the implementation of traceability is explained in which proper establishment of three respective elements are illustrated: method or procedure, measurement system and standard or reference material.