BS EN ISO 6145-1:2008

BS EN ISO 6145-1:2008 Gas analysis. Preparation of calibration gas mixtures using dynamic volumetric methods. Methods of calibration BS EN ISO 6145-1 specifies the calibration methods involved in the preparation of gas mixtures by dynamic volumetric techniques. It also gives a brief presentation of a non-exhaustive list of examples of dynamic volumetric techniques. These techniques are described in more detail in other parts of ISO 6145 Contents of BS EN ISO 6145-1 Introduction Scope Normative references Terms and definitions Calibration methods General Description of primary or potentially primary measuring devices Measurements on the final mixture Techniques for preparation of gas mixtures calibrated by the methods described in Clause 4 General Volumetric pumps Continuous injection Capillary Critical orifices Thermal mass flow controllers Diffusion Saturation Permeation Volume measurement by weighing the water content Description of secondary devices which need calibration against primary devices Bibliography