1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationExpression of performance of gas analyzersPart 1: GeneralBS EN 61207-1:2010National forewordThis British Standard is the UK implementation of EN 61207-1:2010. It isidentical to I
2、EC 61207-1:2010. It supersedes BS EN 61207-1:1994, which willbe withdrawn on 1 July 2013.The UK participation in its preparation was entrusted by Technical CommitteeGEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements ofsystems.A list of organizations represented on this committee can
3、 be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct applic BSI 2011 ISBN 978 0 580 58438 1 ICS 71.040.40Compliance with a British Standard cannot confer immunity from legal obligations.T
4、his British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2011.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 61207-1:2010ation.EUROPEAN STANDARD EN 61207-1 NORME EUROPENNE EUROPISCHE NORM July 2010 CENEL
5、EC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide
6、 for CENELEC members. Ref. No. EN 61207-1:2010 E ICS 19.080; 71.040.40 Supersedes EN 61207-1:1994English version Expression of performance of gas analyzers - Part 1: General (IEC 61207-1:2010) Expression des performances des analyseurs de gaz - Partie 1: Gnralits (CEI 61207-1:2010) Angabe zum Betrie
7、bsverhalten von Gasanalysatoren - Teil 1: Allgemeines (IEC 61207-1:2010) This European Standard was approved by CENELEC on 2010-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a nation
8、al standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in
9、any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
10、 the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 61207-1:2010EN 61207-1:201
11、0 - 2 - Foreword The text of document 65B/741/FDIS, future edition 2 of IEC 61207-1, prepared by SC 65B, Devices to unify methods used in making and verifying statements on the functional performance of such analyzers; to specify which tests should be performed in order to determine the functional p
12、erformance and how such tests should be carried out; to provide basic documents to support the application of standards of quality assurance within ISO 9001. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only t
13、he edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068 (all parts), Environmental testing IEC 60359:2001, Electrical and electronic measurement equipment Expression of performance IEC 60381-1, Analogue signals for
14、 process control systems Part 1: Direct current signals IEC 60382, Analogue pneumatic signal for process control systems IEC 60654 (all parts), Industrial-process measurement and control equipment Operating conditions IEC 60654-1, Industrial-process measurement and control equipment Operating condit
15、ions Part 1: Climatic conditions IEC 60770 (all parts), Transmitters for use in industrial-process control systems IEC 60770-1, Transmitters for use in industrial-process control systems Part 1: Methods for performance evaluation IEC 61010-1, Safety requirements for electrical equipment for measurem
16、ent, control and laboratory use Part 1: General requirements IEC 61187, Electrical and electronic measurement equipment Documentation ISO 31-0, Quantities and units General principles ISO 1000, SI units and recommendations for the use of their multiples and of certain other units 3 Terms and definit
17、ions 3.1 General For the purposes of this document, the following terms and definitions apply. The definitions in 3.2 (excepting 3.2.17), 3.3 and 3.4 are taken from IEC 60359. BS EN 61207-1:2010 8 61207-1 IEC:2010 3.2 Basic terms and definitions 3.2.1 measurand quantity subjected to measurement, eva
18、luated in the state assumed by the measured system during the measurement itself NOTE 1 The value assumed by a quantity subjected to measurement when it is not interacting with the measuring instrument may be called unperturbed value of the quantity. NOTE 2 The unperturbed value and its associated u
19、ncertainty can only be computed through a model of the measured system and of the measurement interaction with the knowledge of the appropriate metrological characteristics of the instrument that may be called instrumental load. 3.2.2 (result of a) measurement set of values attributed to a measurand
20、, including a value, the corresponding uncertainty and the unit of measurement IEC 60050-311, 311-01-01, modified NOTE 1 The mid-value of the interval is called the value (see 3.2.3) of the measurand and its half-width the uncertainty (see 3.2.4). NOTE 2 The measurement is related to the indication
21、(see 3.2.5) given by the instrument and to the values of correction obtained by calibration. NOTE 3 The interval can be considered as representing the measurand provided that it is compatible with all other measurements of the same measurand. NOTE 4 The width of the interval, and hence the uncertain
22、ty, can only be given with a stated level of confidence (see 3.2.4, NOTE 1). 3.2.3 (measure-) value mid element of the set assigned to represent the measurand NOTE The measure-value is no more representative of the measurand than any other element of the set. It is singled out merely for the conveni
23、ence of expressing the set in the format V U, where V is the mid element and U the half-width of the set, rather than by its extremes. The qualifier “measure-“ is used when deemed necessary to avoid confusion with the reading-value or the indicated value. 3.2.4 uncertainty (of measurement) parameter
24、, associated with the result of a measurement, that characterizes the dispersion of the values that could reasonably be attributed to the measurand NOTE 1 The parameter can be, for example, a standard deviation (or a given multiple of it), or a half-width of an interval having a stated level of conf
25、idence. NOTE 2 Uncertainty of measurement comprises, in general, many components. Some of these components can be evaluated from the statistical distribution of the results of a series of measurements and can be characterized by experimental standard deviations. The other components, which can also
26、be characterized by standard deviations, are evaluated from the assumed probability distributions based on experience or other information. IEC 60050-311, 311-01-02, ISO/IEC Guide 99, 2.26 modified NOTE 3 It is understood that the result of the measurement is the best estimate of the value of the me
27、asurand, and that all components of uncertainty, including those arising from systematic effects, such as components associated with corrections and reference standards, contribute to the dispersion. NOTE 4 The definition and notes 1 and 2 are from GUM, Clause B.2.18. The option used in this standar
28、d is to express the uncertainty as the half-width of an interval with the GUM procedures with a coverage factor of 2. This choice corresponds to the practice now adopted by many national standards laboratories. With the normal distribution a coverage factor of 2 corresponds to a level of confidence
29、of 95 %. Otherwise statistical elaborations are necessary to establish the correspondence between the coverage factor and the level of confidence. As the data for such elaborations are not always available, it is deemed preferable to state the coverage factor. This interval can be “reasonably“ assig
30、ned to describe the measurand, in the sense of the GUM definition, as in most BS EN 61207-1:201061207-1 IEC:2010 9 usual cases it ensures compatibility with all other results of measurements of the same measurand assigned in the same way at a sufficiently high confidence level. NOTE 5 Following CIPM
31、 document INC-1 and ISO/IEC Guide 98-3, the components of uncertainty that are evaluated by statistical methods are referred to as components of category A, and those evaluated with the help of other methods as components of category B. 3.2.5 indication or reading-value output signal of the instrume
32、nt IEC 60050-311, 311-01-01, modified NOTE 1 The indicated value can be derived from the indication by means of the calibration curve. NOTE 2 For a material measure, the indication is its nominal or stated value. NOTE 3 The indication depends on the output format of the instrument: for analogue outp
33、uts it is a number tied to the appropriate unit of the display; for digital outputs it is the displayed digitized number; for code outputs it is the identification of the code pattern. NOTE 4 For analogue outputs meant to be read by a human observer (as in the index-on-scale instruments) the unit of
34、 output is the unit of scale numbering; for analogue outputs meant to be read by another instrument (as in calibrated transducers) the unit of output is the unit of measurement of the quantity supporting the output signal. 3.2.6 calibration set of operations which establishes the relationship which
35、exists, under specified conditions, between the indication and the result of a measurement IEC 60050-311, 311-01-09 NOTE 1 The relationship between the indications and the results of measurement can be expressed, in principle, by a calibration diagram. NOTE 2 The calibration must be performed under
36、well-defined operating conditions for the instrument. The calibration diagram representing its result is not valid if the instrument is operated under conditions outside the range used for the calibration. NOTE 3 Quite often,e specially for instruments whose metrological characteristics are sufficie
37、ntly known from past experience, it is convenient to predefine a simplified calibration diagram and perform only a verification of calibration (see 3.3.12) to check whether the response of the instrument stays within its limits. The simplified diagram is, of course, wider than the diagram that would
38、 be defined by the full calibration of the instrument, and the uncertainty assigned to the results of measurements is consequently larger. 3.2.7 calibration diagram portion of the co-ordinate plane, defined by the axis of indication and the axis of results of measurement, which represents the respon
39、se of the instrument to differing values of the measurand IEC 60050-311, 311-01-10 3.2.8 calibration curve curve which gives the relationship between the indication and the value of the measurand NOTE 1 When the calibration curve is a straight line passing through zero, it is convenient to refer to
40、the slope which is known as the instrument constant. IEC 60050-311, 311-01-11 NOTE 2 The calibration curve is the curve bisecting the width of the calibration diagram parallel to the axis of results of measurement, thus joining the points representing the values of the measurand. BS EN 61207-1:2010
41、10 61207-1 IEC:2010 3.2.9 indicated value value given by an indicating instrument on the basis of its calibration curve IEC 60050-311, 311-01-08 NOTE The indicated value is the measure-value of the measurand when the instrument is used in a direct measurement (see 3.3.7) under all the operating cond
42、itions for which the calibration diagram is valid. 3.2.10 (measurement) compatibility property satisfied by all the results of measurement of the same measurand, characterized by an adequate overlap of their intervals IEC 60050-311, 311-01-14 NOTE 1 The compatibility of any result of a measurement w
43、ith all the other ones that represent the same measurand can be asserted only at some level of confidence, as it depends on statistical inference, a level that should be indicated, at least by implicit convention or through a coverage factor. NOTE 2 The compatibility of the results of measurements o
44、btained with different instruments and methods is ensured by the traceability (see 3.2.16) to a common primary standard (see 3.3.6) of the standards used for the calibration of the several instruments (and of course by the correctness of the calibration and operation procedures). NOTE 3 When two res
45、ults of a measurement are not compatible it must be decided by independent means whether one or both results are wrong (perhaps because the uncertainty is too narrow), or whether the measurand is not the same. NOTE 4 Measurements carried out with wider uncertainty yield results which are compatible
46、on a wider range, because they discriminate less among different measurands allowing to classify them with simpler models; with narrower uncertainties the compatibility calls for more detailed models of the measured systems. 3.2.11 intrinsic uncertainty of the measurand minimum uncertainty that can
47、be assigned in the description of a measured quantity NOTE 1 No quantity can be measured with narrower and narrower uncertainty, in as much as any given quantity is defined or identified at a given level of detail. If one tries to measure a given quantity with uncertainty lower than its own intrinsi
48、c uncertainty one is compelled to redefine it with higher detail, so that one is actually measuring another quantity. See also GUM D.1.1. NOTE 2 The result of a measurement carried out with the intrinsic uncertainty of the measurand may be called the best measurement of the quantity in question. 3.2
49、.12 (absolute) instrumental uncertainty uncertainty of the result of a direct measurement of a measurand having negligible intrinsic uncertainty NOTE 1 Unless explicitly stated otherwise, the instrumental uncertainty is expressed as an interval with coverage factor 2. NOTE 2 In single-reading direct measurements of measurands having intrinsic uncertainty small with respect to the instrumental uncertainty, the uncertainty of the measurement coincides, by definition, with the instrumental uncertainty.
