3 solutions for devices that cannot be calibrated or verified
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When it is technically impossible to trace back to SI units, the following three methods are used to resolve this issue: 1) Trace back to the certified reference materials provided by the producers of those reference materials； It generally refers to reference materials produced by laboratories that comply with ISO17034; in this context, such reference materials do not need to be traceable to SI units, and it is not mandatory for them to be certified reference materials. 2) Results from well-defined reference measurement procedures, specified methods, or protocol standards; these can be methods published by certain organizations or institutions, or they may also be custom calibration methods developed by laboratories. 3) Traceability is achieved through comparison, and such comparison must meet two conditions: a) comparison among three or more laboratories; b) the laboratories involved in the comparison must be accredited by CNAS or recognized as members of the ILAC Multilateral Recognition Agreement
I think the simplest option is still to buy standard materials, haha
If it’s already defined as uncalibrable, why calibrate it at all? All methods are attempts at calibration; if it has been determined that calibration is not possible, this indicates a problem with the calibration process. “The “three methods” are just evidence supporting the relative blind test, right?