Overview
EN ISO 6141:2015/A1:2020 is Amendment 1 to ISO 6141:2015, published by CEN in February 2020. This amendment provides a cross-reference table that maps the required contents of certificates for calibration gas mixtures to corresponding clauses in ISO Guide 31:2015 and ISO/IEC 17025:2017. The update aligns gas-analysis certificate requirements with internationally accepted guidance on reference material documentation and laboratory competence.
Key topics and requirements
The amendment replaces Table A.1 of the base standard with a cross-reference table that links certificate elements in ISO 6141 to ISO Guide 31 and ISO/IEC 17025. Key certificate elements included are:
- Unique identification and certificate number (RM unique ID, unique certificate number)
- Name and address of certifying body and names/signatures of certifying officers
- Name, description and intended use of the reference material (RM)
- Certified values, associated measurement uncertainty, and metrological traceability
- Uncertified values and period of validity
- Methods and dates (preparation, analysis, certification)
- Safety and handling information (hazardous situation, instructions for correct use)
- Administrative details (customer, number of pages, source of material)
The amendment also adds bibliographic alignment by referencing ISO/IEC 17025:2017, ISO Guide 31:2015, and ISO 17034:2016 (competence of reference material producers) to emphasize consistent requirements across standards.
Practical applications and users
This amendment is practical for organizations that produce or use calibration gas mixtures and need standardized, accreditation-ready certificates. Typical users include:
- Calibration gas manufacturers and reference material (RM) producers - for preparing compliant certificates
- Testing and calibration laboratories - to ensure certificate contents meet ISO/IEC 17025 and RM guidance
- Accreditation bodies and assessors - for evaluating conformity of certificate documentation
- Quality managers and procurement teams - to verify supplier documentation for traceability and uncertainty
- Instrument manufacturers and end-users in environmental monitoring, industrial process control, and emissions testing - to confirm calibration traceability
Related standards
- ISO Guide 31:2015 - Reference materials: contents of certificates, labels and documentation
- ISO/IEC 17025:2017 - General requirements for the competence of testing and calibration laboratories
- ISO 17034:2016 - General requirements for the competence of reference material producers
Keywords: EN ISO 6141:2015/A1:2020, calibration gas mixtures, certificate contents, ISO Guide 31, ISO/IEC 17025, measurement uncertainty, metrological traceability, reference material certificates, gas analysis.