ISO 16664:2004

Gas analysis — Handling of calibration gases and gas mixtures — Guidelines

ISO 16664:2004 describes factors that may influence the composition of pure gases and homogeneous gas mixtures used for calibration purposes. ISO 16664:2004 only applies to gases or gas mixtures that are within the “utilization period”, and it pays special attention to

• storage of calibration gas cylinders;
• calibration gas withdrawal from cylinders;
• transfer of calibration gas from cylinders to the point of calibration.

ISO 16664:2004 also outlines a method of assessing the stability for a gas mixture, and takes into account the gas composition uncertainty given on the certificate and the users measurement uncertainty.

Edition	2004
Published Date	2004
Published By	International Standardization Organisation
Page Count	17