DS/EN ISO 6143:2025

This document specifies methods for: – determining the composition of a calibration gas mixture by comparison with appropriate reference gas mixtures; – calculating the uncertainty of the composition of a calibration gas mixture in relation to the known uncertainty of the composition of the reference gas mixtures with which it was compared; – checking the composition attributed to a calibration gas mixture by comparison with appropriate reference gas mixtures; – consistency testing and outlier search in suites of calibration gas mixtures of closely related composition.