Overview
EN ISO 6141:2015 (ISO 6141:2015) - "Gas analysis - Contents of certificates for calibration gas mixtures" - specifies the minimum information that must appear on certificates for homogeneous gas mixtures supplied under pressure in cylinders (including pure gases when used for calibration). The standard focuses on metrological aspects (traceability, composition, uncertainty) of calibration gas certificates and explicitly excludes safety, labelling and legislative requirements.
Key Topics and Requirements
The standard defines mandatory and recommended (optional) certificate data. Key technical topics include:
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Mandatory identification and administrative data
- Title of the document, unique certificate identification, container identification (e.g., stamped cylinder number or batch/lot), producer details, authorization date, responsible person, number of pages.
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Gas composition and metrology
- Specified components and their composition (amount fractions), expanded uncertainty, and references to metrological traceability.
- The standard refers to uncertainty reporting principles in ISO/IEC Guide 98‑3 (GUM).
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Preparation, analysis and handling metadata
- Filling pressure, minimum utilisation pressure, expiry date, and methods used for preparation and analysis (optional but recommended). Date of preparation/analysis may be included.
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Additional product data (optional)
- Customer, nominal composition requested, intended use, safety information (informative only), container volume, filling quantity, valve connection, storage/utilisation temperature and indicative values.
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Scope limitations
- Applies only to homogeneous gas mixtures produced as calibration gases; does not cover gases produced for other purposes or safety/legislative labelling.
Applications and Who Uses It
EN ISO 6141:2015 is used to ensure consistent, traceable and clear documentation of calibration gas cylinders. Typical users include:
- Calibration gas producers and suppliers preparing certificates
- Accredited calibration laboratories and testing houses
- Quality managers and procurement professionals specifying calibration gases
- Instrument manufacturers and service engineers conducting calibrations
- Environmental monitoring, emissions testing and process control laboratories requiring documented traceability and uncertainty
Using EN ISO 6141:2015 helps organisations meet accreditation expectations (e.g., alignment with ISO/IEC 17025 principles), improves interoperability of calibration data, and supports reliable instrument calibrations.
Related Standards
- ISO/IEC Guide 98‑3 (GUM) - Uncertainty of measurement
- ISO 7504 - Gas analysis vocabulary
- ISO Guide 31 - Reference materials (cross‑references in the standard)
- ISO/IEC 17025 - Laboratory competence (informative reference related to customer information)
Keywords: EN ISO 6141:2015, ISO 6141:2015, calibration gas mixtures, calibration gas certificates, gas analysis, metrological traceability, uncertainty, cylinder certificates.
