Traceability in calibration is established by...

Traceability in calibration is established by...

• A. An unbroken chain of calibrations back to national or international standards with certificates.
• B. Documented in a lab notebook only.
• C. A single calibration against a local standard.
• D. Not necessary if the method is simple.

Answer: (A)

Traceability means every measurement can be related to recognized standards through an unbroken chain of calibrations. Each step is performed against a higher standard and documented with a calibration certificate that records the result and its uncertainty. This chain must ultimately lead to national or international reference standards, so results are comparable anywhere. Merely recording calibrations in a lab notebook doesn’t prove linkage to external standards. A single calibration against a local standard lacks the required higher‑level reference and certificates. The method’s simplicity does not remove the need for a traceable link to recognized standards. So, the unbroken chain to standards with certificates best establishes traceability.

Traceability means every measurement can be related to recognized standards through an unbroken chain of calibrations. Each step is performed against a higher standard and documented with a calibration certificate that records the result and its uncertainty. This chain must ultimately lead to national or international reference standards, so results are comparable anywhere. Merely recording calibrations in a lab notebook doesn’t prove linkage to external standards. A single calibration against a local standard lacks the required higher‑level reference and certificates. The method’s simplicity does not remove the need for a traceable link to recognized standards. So, the unbroken chain to standards with certificates best establishes traceability.