NOTE 1 This International Standard is specific to automatic methods for measuring methane in the waste gas of stationary sources using flame ionisation detection. It supplements the general requirements of other international or national standards on performance testing, QA/QC procedures, and the test report as specified, for example, in EN 15267-3^[7], EN 14181^[5], and EN 15259^[6].

NOTE 2 An independent method of measurement, e.g. to calibrate or validate permanently installed measuring systems, is specified in ISO 25139^[3].

NOTE 3 In EN 14181^[5], “independent method of measurement” is called “standard reference method (SRM)”.