The calibration certificate must list the reference standards that the external calibration laboratory used in the calibration. Those standards provide the link to the chain of comparisons that establishes a connection to the national or international reference standards.
Every quantitative measurement needs to include the measurement uncertainty value. If the uncertainty information is missing from the calibration certificate, you cannot claim that the measurement is traceable.
The calibration certificate must list the procedure that was used for the calibration. The calibration must be completed according to a written procedure that is a part of the external calibration laboratory’s quality system.
How can Radian Research Inc help me maintain metrological traceability?
Radian is ISO/IEC-17025:2005 accredited and offers calibration/verification services through its global network of CSP’s (Certified Service Partner). ISO/IEC 17025 is the General requirements for the competence of testing and calibration laboratories and is the standard for which most labs must hold accreditation in order to be deemed technically competent. In many cases, suppliers and regulatory authorities will not accept test or calibration results from a lab that is not accredited. Please see diagram below on how Radian maintains IEC17025 accreditation and traceability to NIST/SI measurements.