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측정 결과를 국가 또는 국제 측정 표준에 연결하는, 각각 명시된 불확도를 가진 끊어지지 않는 문서화된 교정 체계.
설명
A factory floor caliper is calibrated against a reference gauge block, which was calibrated against a master gauge block, which was calibrated at a national metrology institute (such as NIST in the US) against the SI meter definition. Each step in this chain has a calibration certificate with quantified uncertainty. Without traceability, measurements from different facilities cannot be reliably compared.
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