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Form · FRM-22

Metrological Traceability Chain Record

Documents each reference standard's calibration chain to the SI and the uncertainty at each link.

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Purpose

Documents the unbroken chain of calibrations from a reference standard to the SI, identifying each link, the calibrating body and its accreditation or NMI status, the certificate, the uncertainty at each link, and the internal standards calibrated from it (SOP-12).

What it covers

  • Chain to the SI
  • Standards and procedures traceable through this reference
  • Non-SI traceability (where applicable)
  • Authorisation

How to complete it

  1. 1.Complete one record per reference standard when it enters service and update at each recalibration.
  2. 2.Link 1 is the external calibration of the reference standard; record the provider, accreditation body and scope reference, the certificate number and date, the calibrated range and the uncertainty.
  3. 3.Where the provider is not an NMI, record how the provider's own traceability to the SI is evidenced (its accreditation implies this); where the chain includes a further link that the Laboratory relies on (for example a designated institute), record it.
  4. 4.List the working standards and procedures that derive traceability from this reference, with the internal certificate numbers.
  5. 5.Where SI traceability is not possible, record the reference used and the justification (SOP-12 section 6.2).

Before you use it

  • Replace every square-bracket token, starting with [LABORATORY NAME], [ADDRESS] and [EFFECTIVE DATE]. The full token list is in GD-01 Read Me First.
  • Have the content technically reviewed against how your laboratory actually works, then approved by the responsible manager before it becomes a controlled document.
  • Update the Word fields after editing so the table of contents and page numbers are correct: select all, then press F9.
  • Record the document in your own document register and set its review date.

Related documents

This is an original template published by ValiTrac. It does not reproduce the text of ISO/IEC 17025 or of any accreditation body publication, and it does not by itself confer or guarantee accreditation. Customise, review and approve it before use.