This standard is intended: – to specify the terminology and definitions of terms related to the performance characteristics of electrochemical analyzers used for the continuous determination of certain aspects of (generally aqueous) solutions; – to specify uniform methods to be used in making statements on the performance characteristics of such analyzers; – to specify general test procedures to determine and verify the performance characteristics of electrochemical analyzers, taking into account the differences of approach in IEC documents specifying test methods (IEC 60359, IEC 60770, IEC 61298); – to provide basic documents to support the application of standards of quality assurance: ISO 9001, ISO 9002 and ISO 9003.