1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 14626:2012Ambient air Standardmethod for the measurementof the concentration of carbonmonoxide by non-dispersiveinfrared spectroscopyBS EN 14626:2012 BRITISH STANDARDNation
2、al forewordThis British Standard is the UK implementation of EN 14626:2012. Itsupersedes BS EN 14626:2005 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EH/2/3, Ambient atmospheres.A list of organizations represented on this committee can beobtained on
3、 request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 69300 7ICS 13.040.20Compliance with a Briti
4、sh Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2012.Amendments issued since publicationDate Text affectedBS EN 14626:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM E
5、N 14626 August 2012 ICS 13.040.20 Supersedes EN 14626:2005English Version Ambient air - Standard method for the measurement of the concentration of carbon monoxide by non-dispersive infrared spectroscopy Air ambiant - Mthode normalise de mesurage de la concentration en monoxyde de carbone par spectr
6、oscopie rayonnement infrarouge non dispersif Luftqualitt - Messverfahren zur Bestimmung der Konzentration von Kohlenmonoxid mit nicht-dispersiver Infrarot-Photometrie This European Standard was approved by CEN on 10 May 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations
7、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 CEN-CENELEC Management Centre or to any CEN member. This
8、 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 has the same status as the official versions. CEN membe
9、rs 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, Luxembourg, Malta, Netherlands, Norway, Poland, Portuga
10、l, 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 CEN All rights of exploitation in any form and by any
11、means reserved worldwide for CEN national Members. Ref. No. EN 14626:2012: EBS EN 14626:2012EN 14626:2012 (E) 2 Contents Contents 2Foreword 41 Scope 52 Normative references 63 Terms and definitions . 64 Abbreviated terms . 105 Principle 115.1 General 115.2 Measuring principle . 115.3 Type approval t
12、est . 115.4 Field operation and quality control 126 Sampling . 126.1 General 126.2 Sampling location 126.3 Sampling system . 126.4 Control and regulation of sample flow rate 136.5 Sampling pump for the manifold 147 Analyser equipment 147.1 General 147.2 Interferents . 147.3 Details about analyser eq
13、uipment . 147.4 Pressure measurement . 157.5 Flow rate indicator . 157.6 Sampling pump for the analyser 157.7 Particle filter . 158 Type approval of carbon monoxide analysers . 158.1 General 158.2 Relevant performance characteristics and performance criteria . 168.3 Design change . 188.4 Procedures
14、for determination of the performance characteristics during the laboratory test . 188.5 Determination of the performance characteristics during the field test 288.6 Expanded uncertainty calculation for type approval . 329 Field operation and ongoing quality control 339.1 General 339.2 Suitability ev
15、aluation . 33BS EN 14626:2012EN 14626:2012 (E) 3 9.3 Initial installation . 359.4 Ongoing quality assurance/quality control. 369.5 Calibration of the analyser 389.6 Checks 399.7 Maintenance . 439.8 Data handling and data reports 449.9 Measurement uncertainty . 4410 Expression of results 4511 Test re
16、ports and documentation 4511.1 Type approval test . 4511.2 Field operation . 46Annex A (normative) Test of lack of fit . 48Annex B (informative) Sampling equipment. 50Annex C (informative) Schematics of non-dispersive infrared spectrometer 52Annex D (informative) Manifold testing 54Annex E (normativ
17、e) Type approval 56Annex F (informative) Calculation of uncertainty in field operation at the 8-hour limit value 75Annex G (informative) Significant technical changes . 83Bibliography 84BS EN 14626:2012EN 14626:2012 (E) 4 Foreword This document (EN 14626:2012) has been prepared by Technical Committe
18、e CEN/TC 264 “Air quality”, the secretariat of which is held by DIN. 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 February 2013, and conflicting national standards shall be withdrawn at the lat
19、est by February 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 document supersedes EN 14626:2005. The technical changes ma
20、de since EN 14211:2005 are listed in Annex G of this European Standard. 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, Denma
21、rk, Estonia, Finland, Former Yugoslav 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. BS EN 14626:201
22、2EN 14626:2012 (E) 5 1 Scope This European Standard specifies a continuous measurement method for the determination of the concentration of carbon monoxide present in ambient air based on the non-dispersive infrared spectroscopic measuring principle. This standard describes the performance character
23、istics and sets the relevant minimum criteria required to select an appropriate non-dispersive infrared spectroscopic analyser by means of type approval tests. It also includes the evaluation of the suitability of an analyser for use in a specific fixed site so as to meet the data quality requiremen
24、ts as specified in Annex I of Directive 2008/50/EC 1 and requirements during sampling, calibration and quality assurance for use. The method is applicable to the determination of the mass concentration of carbon monoxide present in ambient air up to 100 mg/m3carbon monoxide. This concentration range
25、 represents the certification range for the type approval test. NOTE 1 Other ranges may be used depending on the levels present in ambient air. NOTE 2 When the standard is used for other purposes than for measurements required by Directive 2008/50/EC, the ranges and uncertainty requirements may not
26、apply. The method covers the determination of ambient air concentrations of carbon monoxide in zones classified as rural areas, urban-background areas and traffic-orientated locations and locations influenced by industrial sources. The results are expressed in mg/m3(at 20 C and 101,3 kPa). NOTE 3 10
27、0 mg/m3of CO corresponds to 86 mol/mol of CO. This standard contains information for different groups of users. Clauses 5 to 7 and Annexes B, C and D contain general information about the principles of carbon monoxide measurement by non-dispersive infrared spectroscopic analyser and sampling equipme
28、nt. Clause 8 and Annex E are specifically directed towards test houses and laboratories that perform type-approval testing of carbon monoxide analysers. These sections contain information about: type-approval test conditions, test procedures and test requirements; analyser performance requirements;
29、evaluation of the type-approval test results; evaluation of the uncertainty of the measurement results of the carbon monoxide analyser based on the type-approval test results. Clauses 9 to 11 and Annex F are directed towards monitoring networks performing the practical measurements of carbon monoxid
30、e in ambient air. These sections contain information about: initial installation of the analyser in the monitoring network and acceptance testing; ongoing quality assurance/quality control; calculation and reporting of measurement results; evaluation of the uncertainty of measurement results under p
31、ractical monitoring conditions. BS EN 14626:2012EN 14626:2012 (E) 6 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references
32、, the latest edition of the referenced document (including any amendments) applies. EN 15267-1, Air quality Certification of automated measuring systems Part 1: General principles EN 15267-2, Air quality Certification of automated measuring systems Part 2: Initial assessment of the AMS manufacturers
33、 quality management system and post certification surveillance for the manufacturing process EN ISO 6142, Gas analysis Preparation of calibration gas mixtures Gravimetric method (ISO 6142) EN ISO 6143, Gas analysis Comparison methods for determining and checking the composition of calibration gas mi
34、xtures (ISO 6143) EN ISO 6144, Gas analysis Preparation of calibration gas mixtures Static volumetric methods (ISO 6144) EN ISO 6145-6, Gas analysis Preparation of calibration gas mixtures using dynamic volumetric methods Part 6: Critical orifices (ISO 6145-6) EN ISO 6145-7, Gas analysis Preparation
35、 of calibration gas mixtures using dynamic volumetric methods Part 7: Thermal mass-flow controllers (ISO 6145-7) EN ISO 14956, Air quality Evaluation of the suitability of a measurement procedure by comparison with a required measurement uncertainty (ISO 14956) EN ISO/IEC 17025, General requirements
36、 for the competence of testing and calibration laboratories (ISO/IEC 17025) ENV 13005:1999, Guide to the expression of uncertainty in measurement 3 Terms and definitions For the purpose of this document, the following terms and definitions apply. 3.1 adjustment set of operations carried out on a mea
37、suring system so that it provides prescribed indications corresponding to given values of a quantity to be measured Note 1 to entry: Types of adjustment of a measuring system include zero adjustment of a measuring system, offset adjustment, and span adjustment (sometimes called gain adjustment). Not
38、e 2 to entry: Adjustment of a measuring system should not be confused with calibration, which is a prerequisite for adjustment. SOURCE: JCGM 200:2012 (VIM) 2 Note 3 to entry: In the context of this standard, adjustment is performed on measurement data rather than on the analyser. 3.2 ambient air out
39、door air in the troposphere, excluding workplaces as defined by Directive 89/654/EEC, where provisions concerning health and safety at work apply and to which members of the public do not have regular access SOURCE: 2008/50/EC1 BS EN 14626:2012EN 14626:2012 (E) 7 3.3 analyser measuring system that p
40、rovides an output signal which is a function of the concentration, partial pressure, flow or temperature of one or more components of a gas mixture 3.4 availability of the analyser fraction of the time period for which valid measuring data of the ambient air concentration is available from an analys
41、er 3.5 calibration operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this
42、 information to establish a relation for obtaining a measurement result from an indication Note 1 to entry: A calibration may be expressed by a statement, calibration function, calibration diagram, calibration curve, or calibration table. In some cases, it may consist of an additive or multiplicativ
43、e correction of the indication with associated measurement uncertainty. Note 2 to entry: Calibration should not be confused with adjustment of a measuring system, often mistakenly called “self-calibration”, nor with verification of a calibration. Note 3 to entry: Often, the first step alone in the a
44、bove definition is perceived as being calibration. SOURCE: JCGM 200:2012 (VIM) 2 Note 4 to entry: In the context of this standard, calibration is a comparison of the analyser response to a known gas concentration with a known uncertainty when the information obtained from the comparison is used for
45、the successive adjustment (if needed) of the analyser. 3.6 certification range concentration range for which the analyser is type-approved 3.7 check verification that the analyser is still operating within specified performance limits 3.8 combined standard uncertainty standard uncertainty of the res
46、ult of a measurement when that result is obtained from the values of a number of other quantities, equal to the positive square root of a sum of terms, the terms being the variances or co-variances of these other quantities weighted according to how the measurement result varies with changes in thes
47、e quantities SOURCE: ENV 13005:1999 3.9 coverage factor numerical factor used as a multiplier of the combined standard uncertainty in order to obtain an expanded uncertainty SOURCE: ENV 13005:1999 3.10 designated body body which has been designated for a specific task (type approval tests and/or QA/
48、QC activities in the field) by the competent authority in the Member States BS EN 14626:2012EN 14626:2012 (E) 8 3.11 detection limit smallest concentration of a measurand that can be reliably detected by a specific measurement process Note 1 to entry: The detection limit is calculated as 3,3 x (sz/B
49、) where szis the standard deviation of analyser response at zero measurand concentration (see 8.4.5) and B is the slope of the calibration function 3. 3.12 expanded uncertainty quantity defining an interval about the result of a measurement that may be expected to encompass a large fraction of the distribution of val
