This International Standard specifies the tests which should be carried out to determine the functional performance of sample handling systems. In addition it specifies the information to be provided by the manufacturers and users of such systems. It is applicable to: a) systems handling gaseous or liquid samples for process analyzers used for any ultimate purpose, e.g. process control, emission, ambient air monitoring, etc.; b) complete systems and system components; c) power supplies and instrumentation for providing and controlling other utilities necessary for process analyzers or sample handling system components, only in so far as they are a functional part of the system; d) facilities for maintaining system performance; e) facilities for maintaining the pe rf ormance of the process analyzer if these are part of the sample handling system and not the analyzer. NOTES 1 This standard has been prepared in accordance with the general principles set out in IEC 359. 2 Requirements for general principles concerning quantities, units and symbols are given in ISO 1000 and recommendations for the use of their multiples and of certain other units in ISO 31.