1、April 2013 Translation by DIN-Sprachendienst.English price group 17No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、75.060!$“1999358www.din.deDDIN EN ISO 10723Natural gas Performance evaluation for analytical systems (ISO 10723:2012);English version EN ISO 10723:2012,English translation of DIN EN ISO 10723:2013-04Erdgas Bewertung der Leistungsfhigkeit von Analysensystemen (ISO 10723:2012);Englische Fassung EN ISO
3、 10723:2012,Englische bersetzung von DIN EN ISO 10723:2013-04Gaz natural valuation des performances des systemes danalyse (ISO 10723:2012);Version anglaise EN ISO 10723:2012,Traduction anglaise de DIN EN ISO 10723:2013-04SupersedesDIN EN ISO 10723:2003-02www.beuth.deDocument comprises pagesIn case o
4、f doubt, the German-language original shall be considered authoritative.4003.13DIN EN ISO 10723:2013-04 2 A comma is used as the decimal marker. National foreword This document (EN ISO 10723:2012) has been prepared by Technical Committee ISO/TC 193 “Natural gas” (Secretariat: NEN, Netherlands) in co
5、llaboration with Technical Committee CEN/SS N21 “Gaseous fuels and combustible gas” (Secretariat: CCMC). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-05-73 AA Gasanalyse und Gas-bescha
6、ffenheit. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 5479 DIN ISO 5479 ISO 5725-1 DIN ISO 5725-1 ISO 5725-2 DIN ISO 5725-2 ISO 6141 DIN EN ISO 6141 ISO 6143 DIN EN ISO 6143 ISO 6974-1 DIN EN ISO 6974-1 ISO 6974-2 DIN EN ISO 6974-2
7、ISO 6976 DIN EN ISO 6976 ISO 14111 DIN EN ISO 14111 ISO 14532 DIN EN ISO 14532 ISO 15796 DIN EN ISO 15796 ISO/IEC 17025 DIN EN ISO/IEC 17025 GUM DIN V ENV 13005 Amendments This standard differs from DIN EN ISO 10723:2003-02 as follows: a) Clause 3 “Terms and definitions” has been included; b) the st
8、andard has been editorially revised. Previous editions DIN EN ISO 10723: 2003-02 DIN EN ISO 10723:2013-04 3 National Annex NA (informative) Bibliography DIN V ENV 13005, Guide to the expression of uncertainty in measurement DIN EN ISO 6141, Gas analysis Requirements for certificates for calibration
9、gases and gas mixtures DIN EN ISO 6143, Gas analysis Comparison methods for determining and checking the composition of calibration gas mixtures DIN EN ISO 6974-1, Natural gas Determination of composition and associated uncertainty by gas chromatography Part 1: General guidelines and calculation of
10、composition DIN EN ISO 6974-2, Natural gas Determination of composition and associated uncertainty by gas chromatography Part 2: Uncertainty calculations DIN EN ISO 6976, Natural gas Calculation of calorific values, density, relative density and Wobbe index from composition DIN EN ISO 14111, Natural
11、 gas Guidelines to traceability in analysis DIN EN ISO 14532, Natural gas Vocabulary DIN EN ISO 15796, Gas analysis Investigation and treatment of analytical bias DIN EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories DIN ISO 5479, Statistical interpret
12、ation of data Tests for departure from the normal distribution DIN ISO 5725-1, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions DIN ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for
13、 the determination of repeatability and reproducibility of a standard measurement method DIN EN ISO 10723:2013-04 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10723 December 2012 ICS 75.060 Supersedes EN ISO 10723:2002English Version Natural gas - Perfo
14、rmance evaluation for analytical systems (ISO 10723:2012) Gaz naturel - valuation des performances des systmes danalyse (ISO 10723:2012) Erdgas - Bewertung der Leistungsfhigkeit von Analysensystemen (ISO 10723:2012) This European Standard was approved by CEN on 30 November 2012. CEN members are boun
15、d to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CE
16、N-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre h
17、as the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, L
18、uxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012
19、CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10723:2012: EContents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 6 3 Terms and definitions .6 4 Symbols 7 5 Principle 8 6 General procedure .9 6.1 Analytical
20、 requirements 9 6.2 Response function types 10 6.3 Calibration gas reference data .11 6.4 Working measurement standards (WMS) .12 6.5 Experimental design 13 6.6 Calculation procedures .15 7 Interpretation 20 7.1 General considerations .20 7.2 Pre-defined performance specification .20 7.3 Determinati
21、on of the analytical range of the instrument .20 7.4 Criteria for selection of hypothetical compositions .21 Annex A (informative) Example of application using chromatography .22 Annex B (informative) Explanation of approach used for instrument benchmarking .34 Bibliography 36 DIN EN ISO 10723:2013-
22、04 EN ISO 10723:2012 (E) 2 Foreword This document (EN ISO 10723:2012) has been prepared by Technical Committee ISO/TC 193 “Natural gas”. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2013,
23、and conflicting national standards shall be withdrawn at the latest by June 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This
24、 document supersedes EN ISO 10723:2002. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yug
25、oslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 10723:2012 h
26、as been approved by CEN as a EN ISO 10723:2012 without any modification. DIN EN ISO 10723:2013-04 EN ISO 10723:2012 (E) 3 IntroductionThis International Standard describes a method for evaluating the performance of analytical systems intended for the analysis of natural gas. Natural gas is assumed t
27、o consist predominantly of methane, with other saturated hydrocarbons and non-combustible gases.Performance evaluation makes no assumption about equipment for and/or methodology of analysis but gives test methods which can be applied to the chosen analytical system, including the method, equipment a
28、nd sample handling.This International Standard contains an informative annex (Annex A) that shows the application for an on-line gas chromatographic system which, as described, is assumed to have a response/concentration relationship for all components that is represented by a straight line through
29、the origin. This International Standard contains an additional informative annex (Annex B) that gives a rationale for the approach used for instrument benchmarking.DIN EN ISO 10723:2013-04 EN ISO 10723:2012 (E) 4 1 Scope1.1 This International Standard specifies a method of determining whether an ana
30、lytical system for natural gas analysis is fit for purpose. It can be used eithera) to determine a range of gas compositions to which the method can be applied, using a specified calibration gas, while satisfying previously defined criteria for the maximum errors and uncertainties on the composition
31、 or property or both, orb) to evaluate the range of errors and uncertainties on the composition or property (calculable from composition) or both when analysing gases within a defined range of composition, using a specified calibration gas.1.2 It is assumed thata) for evaluations of the first type a
32、bove, the analytical requirement has been clearly and unambiguously defined, in terms of the range of acceptable uncertainty on the composition, and, where appropriate, the uncertainty in physical properties calculated from these measurements,b) for applications of the second type above, the analyti
33、cal requirement has been clearly and unambiguously defined, in terms of the range of composition to be measured and, where appropriate, the range of properties which may be calculated from these measurements,c) the analytical and calibration procedures have been fully described, andd) the analytical
34、 system is intended to be applied to gases having compositions which vary over ranges normally found in gas transmission and distribution systems.1.3 If the performance evaluation shows the system to be unsatisfactory in terms of the uncertainty on the component amount fraction or property, or shows
35、 limitations in the ranges of composition or property values measurable within the required uncertainty, then it is intended that the operating parameters, includinga) the analytical requirement,b) the analytical procedure,c) the choice of equipment,d) the choice of calibration gas mixture, ande) th
36、e calculation procedure,be reviewed to assess where improvements can be obtained. Of these parameters, the choice of the calibration gas composition is likely to have the most significant influence.1.4 This International Standard is applicable to analytical systems which measure individual component
37、 amount fractions. For an application such as calorific value determination, the method will be typically gas chromatography, set up, as a minimum, for the measurement of nitrogen, carbon dioxide, individual hydrocarbons from C1to C5and a composite measurement representing all higher hydrocarbons of
38、 carbon number 6 and above. This allows for the calculation of calorific value and similar properties with acceptable accuracy. In addition, components such as H2S can be measured individually by specific measurement methods to which this evaluation approach can also be applied.DIN EN ISO 10723:2013
39、-04 EN ISO 10723:2012 (E) 5 1.5 Performance evaluation of an analytical system is intended to be performed following initial installation to ensure that errors associated with assumed response functions are fit for purpose. Thereafter, periodic performance evaluation is recommended, or whenever any
40、critical component of the analytical system is adjusted or replaced. The appropriate interval between periodic performance evaluations will depend upon both how instrument responses vary with time and also how large an error may be tolerated. This first consideration is dependent upon instrument/ope
41、ration; the second is dependent on the application. It is not appropriate, therefore, for this International Standard to offer specific recommendations on intervals between performance evaluations.2 Normative referencesThe following referenced documents are indispensable for the application of this
42、document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO/IEC Guide 98-3:2008, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)ISO 614
43、3:2001, Gas analysis Comparison methods for determining and checking the composition of calibration gas mixturesISO 6974-2, Natural gas Determination of composition and associated uncertainty by gas chromatography Part 2: Uncertainty calculationsISO 6976:1995, Natural gas Calculation of calorific va
44、lues, density, relative density and Wobbe index from composition3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1uncertainty of measurementparameter, associated with the result of a measurement, that characterizes the dispersion of values that ca
45、n reasonably be attributed to the measurandNOTE In keeping with ISO/IEC Guide 98-3, in this International Standard the uncertainty of the composition is expressed as a standard uncertainty or as an expanded uncertainty calculated through the use of an appropriate coverage factor.3.2certified referen
46、ce gas mixtureCRMreference gas mixture, characterized by a metrologically valid procedure for one or more specified properties, accompanied by a certificate that provides the value of the specified property, its associated uncertainty, and a statement of metrological traceabilityNOTE 1 The above def
47、inition is based on the definition of “certified reference material” in ISO Guide 353. “Certified reference material” is a generic term; “certified reference gas mixture” is more suited to this application.NOTE 2 Metrologically valid procedures for the production and certification of reference mater
48、ials (such as certified reference gas mixtures) are given in, among others, ISO Guide 344and ISO Guide 353.NOTE 3 ISO Guide 315gives guidance on the contents of certificates.DIN EN ISO 10723:2013-04 EN ISO 10723:2012 (E) 6 3.3working measurement standardWMSstandard that is used routinely to calibrat
49、e or verify measuring instruments or measuring systemsISO/IEC Guide 99:2007, 5.7NOTE A working measurement standard is usually calibrated against a CRM.3.4calibration gas mixtureCGMgas mixture whose composition is sufficiently well established and stable to be used as a working measurement standard of compositionNOTE In this International Standard, a CGM is used for routine (e.g. daily) component calibration of the analyser. It is independent of the WMSs used to perform the evaluation.3.5responseoutput signal of the m
