IEC 60746-1 pdf download Expression of performance of electrochemical analyzers – Part 1: General
This standard is intended:
– to specify the terminology and definitions of terms related to the performance charac-teristics of electrochemical analyzers used for the continuous determination of certainaspects of (generally aqueous) solutions;
to specify uniform methods to be used in making statements on the performancecharacteristics of such analyzers;
to specify general test procedures to determine and verify the performance characteristicsof electrochemical analyzers， taking into account the differences of approach in ECdocuments specifying test methods (iEc 60359,IEC 60770,IEC61298);
to provide basic documents to support the application of standards of quality assurance:lso 9o01,ISO 9002 and lso 9o03.
2 Normative references
The following referenced documents are indispensable for the application of this document.For dated references,only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60068-1,Environmental testing – Part 1: General and guidance
IEC 60359:2001,Electrical and electronic measurement equipment – Expression ofperformance
IEC 60381-1,Analogue signals for process control systems – Part 1: Direct current signalsIEC 60382,Analogue pneumatic signal for process control systems
IEC 60654-1,Industrial-process measurement and control equipment – Operating conditions -art 1: Climatic conditions
IEC 60770-1，Transmitters for use in industrial-process control systems – Part 1: Methods forperformance evaluation
IEC 61298,(all parts): Process measurement and control devices – General methods andprocedures for evaluating performance
Iso 9001，Quality management systems – Requirements
Iso 9002，Quality systems – Model for quality assurance in production，installation andservicing
lso 9003,Quality systems – Model for quality assurance in final inspection and test
3 Terms and definitions
For the purposes of this standard, the following definitions apply. These definitions are basedon those in lEC 60359.Additional definitions from lEC 60770 are included for performancecharacteristics appropriate to electrochemical analyzers.The definitions have, in some cases,been clarified and directed towards relevance to electrochemical analyzers.The reconciliationof the quantities used to define performance characteristics in this document with thosereferred to in lEC 60359,IEC 60770 and lEC 61298 is discussed in clause 4.
measuring instrument that provides an indication of a specific property of a medium by use ofa sensor which responds to ions from electrolytes (or ions generated from reactions withnon-electrolytes) in that medium
NOTE The analyzer may comprise of separate parts, see below.
that part of the electrochemical analyzer (which may be a separate unit) which is in contactwith the medium in which the property is to be measured
NOTE In general an electrical output related to that property of the sample which is to be measured is derivedfrom this part of the analyzer.Examples of electrochemical sensors are: pH, ion-sensitive and redox potentiometriccells, dissolved oxygen cells, conductance cells.
device converting the electrical signal from the sensor to a defined, scaled, output signal
device which provides well-defined electrical properties similar to a specific type of sensorNOTE lt may therefore be used to determine the performance characteristics of the electronic unit alone. It mustexhibit uncertainties that are negligible in comparison with the specifications of performance characteristics to bedetermined.