oSIST prEN 14626:2022

Ambient air - Standard method for the measurement of the concentration of carbon monoxide by non-dispersive infrared spectroscopy

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 characteristics 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 requirements 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/m3 carbon monoxide. This concentration range 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 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 3 100 mg/m3 of CO corresponds to 86 μmol/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 equipment.
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;
− 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 monoxide 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 practical monitoring conditions.

Außenluft - Messverfahren zur Bestimmung der Konzentration von Kohlenmonoxid mit nicht-dispersiver Infrarot-Photometrie

Dieses Dokument legt ein kontinuierliches Messverfahren nach dem nicht-dispersiven Infrarot-Messprinzip zur Bestimmung der Konzentration von Kohlenmonoxid in Außenluft fest. Es nennt die Leistungskenngrößen und legt die Mindestanforderungen für die Eignungsprüfung von Infrarot-Photometern fest. Es beinhaltet auch die Bewertung der Eignung eines Messgeräts für den Einsatz an einem bestimmten ortsfesten Messstandort bezüglich der Anforderungen an die Datenqualität und bezüglich der Anforderungen für Probennahme, Kalibrierung und Qualitätssicherung.
ANMERKUNG 1 Zusätzliche Information ist in Anhang 1 der Richtline 2008/50/EG [1] gegeben
Das Verfahren ist anwendbar zur Bestimmung der Massenkonzentration von Kohlenmonoxid in Außenluft bis 100 mg/m3. Dieser Konzentrationsbereich entspricht dem Zertifizierungsbereich für die Eignungsprüfung.
ANMERKUNG 2 Je nach Konzentrationsniveau in der Luft können auch andere Bereiche gewählt werden.
ANMERKUNG 3 Wird diese Norm für andere Zwecke als für Messungen nach Richtlinie 2008/50/EG eingesetzt, dann brauchen die Anforderungen hinsichtlich Anwendungsbereich und Unsicherheit nicht zur Geltung kommen.
Das Verfahren umfasst die Bestimmung der Konzentration von Kohlenmonoxid an Standorten, die als ländlich, städtischer Hintergrund klassifiziert sind sowie für Probenahmepunkte, die durch Verkehr oder industrielle Quellen beeinflusst werden.
Die Ergebnisse werden in mg/m3 (bei 20 °C und 101,3 kPa) angegeben.
ANMERKUNG 4 100 mg/m3 Kohlenmonoxid entsprechen 86 μmol/mol Kohlenmonoxid.
Dieses Dokument enthält Informationen für verschiedene Nutzergruppen.
Abschnitt 5 bis Abschnitt 7 und Anhang B, Anhang C und Anhang D enthalten allgemeine Informationen über die Grundlagen der Kohlenmonoxid-Messung mit einem nicht-dispersiven Infrarot-Photometer sowie über die Probennahmeeinrichtung.
Abschnitt 8 und Anhang E richten sich speziell an Prüfinstitute und -laboratorien, die Eignungsprüfungen von Kohlenmonoxid-Messgeräten durchführen. Diese Abschnitte enthalten Informationen über
— Prüfbedingungen, -verfahren und -anforderungen bei der Eignungsprüfung;
— Anforderungen an die Leistungsfähigkeit des Messgeräts;
— die Bewertung der Ergebnisse der Eignungsprüfung;
— die Bewertung der Unsicherheit der Messergebnisse des Kohlenmonoxid-Messgeräts anhand der Eignungsprüfungsergebnisse.
Abschnitt 9 bis Abschnitt 11 und Anhang F richten sich an die Betreiber von Messnetzen, mit denen Kohlenmonoxid-Messungen in Außenluft durchgeführt werden. Diese Abschnitte enthalten Informationen über
— die Erstinstallation des Messgeräts im Messnetz und Eignungsbewertung;
— die laufende Qualitätssicherung und -kontrolle;
— die Berechnung und Übermittlung der Messergebnisse;
— die Bewertung der Unsicherheit der Messergebnisse unter Messbedingungen.
Das vorliegende Dokument stellt eine Weiterentwicklung der vorangegangenen Ausgaben (EN 14626:2005 und EN 14626:2012) dar. Bei der Beschaffung von Geräten, müssen diese vollständig mit dem vorliegenden Dokument übereinstimmen.
ANMERKUNG 5 Eignungsprüfungen, die vor der Veröffentlichung dieses Dokuments zum Zweck des Nachweises der Gleichwertigkeit durchgeführt wurden, sind weiterhin gültig.
ANMERKUNG 6 Eignungsprüfungen von Messgeräten, die vor der Veröffentlichung dieses Dokuments durchgeführt wurden, bleiben weiterhin für die Verwendung für regulierte Beobachtungszwecke gültig.

Air ambiant - Méthode normalisée de mesurage de la concentration en monoxyde de carbone par spectroscopie à rayonnement infrarouge non dispersif

Le présent document spécifie une méthode de mesurage en continu pour la détermination de la concentration en monoxyde de carbone dans l'air ambiant, selon le principe de mesure par spectroscopie à rayonnement infrarouge non dispersif. Le présent document décrit les caractéristiques de performance et fixe les critères minimaux requis pour sélectionner un analyseur par spectroscopie à rayonnement infrarouge non dispersif à l'aide d'essais de type. Il présente également l'évaluation de l'aptitude à l'emploi d'un analyseur sur un site fixe spécifique de manière à répondre aux exigences de qualité des données, ainsi qu'aux exigences à observer au cours du prélèvement, de l'étalonnage et de l'assurance qualité.
NOTE 1 Des informations supplémentaires sont spécifiées dans l'Annexe I de la Directive 2008/50/CE [1].
La méthode s'applique à la détermination de la concentration massique en monoxyde de carbone présent dans l'air ambiant jusqu'à 100 mg/m3. Cette plage de concentration représente l'étendue de mesure certifiée pour les essais de type.
NOTE 2 D'autres plages peuvent être utilisées selon les niveaux présents dans l'air ambiant.
NOTE 3 Lorsque la norme est utilisée à d'autres fins que la Directive 2008/50/CE, les exigences relatives à la plage et à l'incertitude peuvent ne pas s'appliquer.
La méthode couvre la détermination des concentrations en monoxyde de carbone présent dans l'air ambiant dans les lieux classés comme zones rurales et zones urbaines de fond, ainsi que pour les points de prélèvement influencés par la circulation automobile ou des sources industrielles.
Les résultats sont exprimés en mg/m3 (à 20 °C et 101,3 kPa).
NOTE 4 100 mg/m3 de CO correspondent à 86 μmol/mol de CO.
Le présent document contient des informations pour différents groupes d'utilisateurs.
Les Articles 5 à 7 et les Annexes B, C et D contiennent des informations générales relatives aux principes de mesurage du monoxyde de carbone à l'aide d'un analyseur par spectroscopie à rayonnement infrarouge non dispersif et d'un équipement de prélèvement.
L'Article 8 et l'Annexe E concernent tout particulièrement les entreprises et les laboratoires d'essai qui effectuent des essais de type des analyseurs de monoxyde de carbone. Ces sections contiennent des informations concernant :
⎯ les conditions des essais de type, les procédures de test et les exigences d'essai ;
⎯ les exigences de performance de l'analyseur ;
⎯ l'évaluation des résultats des essais de type ;
⎯ l'évaluation de l'incertitude des résultats de mesurage de l'analyseur de monoxyde de carbone d'après les résultats des essais de type.
prEN 14626:2022 (F)
7
Les Articles 9 à 11 et l'Annexe F concernent les réseaux de surveillance effectuant les mesurages en conditions réelles du monoxyde de carbone dans l'air ambiant. Ces sections contiennent des informations concernant :
⎯ l'installation initiale de l'analyseur dans le réseau de surveillance et l'essai de réception ;
⎯ l'assurance qualité/le contrôle qualité en continu ;
⎯ le calcul et le compte-rendu des résultats de mesurage ;
⎯ l'évaluation de l'incertitude des résultats de mesurage sous des conditions de surveillance réelles.
Le présent document est une évolution des éditions précédentes (EN 14626:2005 et EN 14626:2012). L'équipement, lorsqu'il est fourni, se conforme pleinement au présent document.
NOTE 5 Les essais de type réalisés avant la publication du présent document, dans le but de démontrer l'équivalence, restent valides.
NOTE 6 Les analyseurs soumis à essai de type avant la publication du présent document restent valides à des fins de surveillance réglementée.

Zunanji zrak - Standardna metoda za določanje koncentracije ogljikovega monoksida z nedisperzivno infrardečo spektroskopijo

General Information

• Status: Not Published
• Public Enquiry End Date: 02-Jan-2023
• ICS: 13.040.20 - Ambient atmospheres
• Technical Committee: KAZ - Air quality
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 14-Oct-2022
• Due Date: 03-Mar-2023
• Completion Date: 12-Jan-2023
• Directive: 2008/50/EC - Directive 2008/50/EC of the European Parliament and of the Council of 21 May 2008 on ambient air quality and cleaner air for Europe
• Ref Project: prEN 14626 - Ambient air - Standard method for the measurement of the concentration of carbon monoxide by non-dispersive infrared spectroscopy

Relations

• Revised: SIST EN 14626:2012 - Ambient air - Standard method for the measurement of the concentration of carbon monoxide by non-dispersive infrared spectroscopy
• Effective Date: 01-Dec-2022

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 14626:2022
01-december-2022
Zunanji zrak - Standardna metoda za določanje koncentracije ogljikovega
monoksida z nedisperzivno infrardečo spektroskopijo
Ambient air - Standard method for the measurement of the concentration of carbon
monoxide by non-dispersive infrared spectroscopy
Außenluft - Messverfahren zur Bestimmung der Konzentration von Kohlenmonoxid mit
nicht-dispersiver Infrarot-Photometrie
Air ambiant - Méthode normalisée de mesurage de la concentration en monoxyde de
carbone par spectroscopie à rayonnement infrarouge non dispersif
Ta slovenski standard je istoveten z: prEN 14626
ICS:
13.040.20 Kakovost okoljskega zraka Ambient atmospheres
oSIST prEN 14626:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 14626:2022

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oSIST prEN 14626:2022


DRAFT
EUROPEAN STANDARD
prEN 14626
NORME EUROPÉENNE

EUROPÄISCHE NORM

October 2022
ICS 13.040.20 Will supersede EN 14626:2012
English Version

Ambient air - Standard method for the measurement of the
concentration of carbon monoxide by non-dispersive
infrared spectroscopy
Air ambiant - Méthode normalisée de mesurage de la Außenluft - Messverfahren zur Bestimmung der
concentration en monoxyde de carbone par Konzentration von Kohlenmonoxid mit nicht-
spectroscopie à rayonnement infrarouge non dispersif dispersiver Infrarot-Photometrie
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 264.

If this draft becomes a European Standard, CEN members are bound 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.

This draft European Standard was established by CEN 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 members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14626:2022 E
worldwide for CEN national Members.

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Contents
Page
European foreword . 5
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 8
4 Abbreviated terms . 13
5 Principle . 13
5.1 General . 13
5.2 Measuring principle . 13
5.3 Type testing . 14
5.4 Field operation and quality control. 14
6 Sampling . 14
6.1 General . 14
6.2 Sampling location . 15
6.3 Sampling system . 15
6.3.1 Construction . 15
6.3.2 Particle filter . 15
6.3.3 Loss of carbon monoxide . 16
6.3.4 Conditioning . 16
6.4 Control and regulation of sample flow rate . 16
6.5 Sampling pump for the manifold . 16
7 Analyser equipment . 16
7.1 General . 16
7.2 Interferents . 17
7.2.1 General . 17
7.2.2 Water vapour . 17
7.2.3 Carbon dioxide . 17
7.2.4 Hydrocarbons . 17
7.2.5 Nitrous oxide. 17
7.2.6 Nitric oxide . 17
7.3 Details about analyser equipment . 17
7.4 Pressure measurement . 18
7.5 Flow rate indicator . 18
7.6 Sampling pump for the analyser . 18
7.7 Particle filter . 18
8 Type testing of carbon monoxide analysers . 18
8.1 General . 18
8.2 Relevant performance characteristics and performance criteria. 19
8.3 Design change . 23
8.4 Procedures for determination of the performance characteristics during
the laboratory test . 23
8.4.1 General . 23
8.4.2 Test conditions . 23
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8.4.3 Response time . 26
8.4.4 Short-term drift . 28
8.4.5 Repeatability standard deviation . 28
8.4.6 Lack of fit of linearity of the calibration function . 29
8.4.7 Sensitivity coefficient to ambient gas pressure . 30
8.4.8 Sensitivity coefficient to sample gas pressure . 31
8.4.9 Sensitivity coefficient to the surrounding temperature . 31
8.4.10 Sensitivity coefficient to electrical voltage . 32
8.4.11 Interferents . 33
8.4.12 Averaging test . 34
8.4.13 Difference sample/calibration port . 35
8.5 Determination of the performance characteristics during the field test . 36
8.5.1 General . 36
8.5.2 Selection of a monitoring station for the field test . 36
8.5.3 Operational requirements . 37
8.5.4 Long-term drift . 38
8.5.5 Reproducibility standard deviation under field conditions . 39
8.5.6 Period of unattended operation . 39
8.5.7 Period of availability of the analyser . 39
8.6 Expanded uncertainty calculation for type testing . 40
9 Field operation and ongoing quality control . 40
9.1 General . 40
9.2 Suitability evaluation . 41
9.2.1 General . 41
9.2.2 Analyser for a monitoring station or task. 41
9.3 Initial installation . 43
9.4 Ongoing quality assurance/quality control . 43
9.4.1 General . 43
9.4.2 Frequency of calibrations, checks and maintenance . 44
9.5 Calibration of the analyser . 47
9.5.1 General . 47
9.5.2 Calibration gases . 48
9.5.3 Data adjustment function . 48
9.6 Checks . 48
9.6.1 Zero and span checks . 48
9.6.2 Lack-of-fit. 50
9.6.3 Testing the sample system . 51
9.6.4 Treatment of data after exceedance of performance criteria . 52
9.7 Maintenance . 53
9.7.1 Change of particle filters . 53
9.7.2 Change of sampling lines . 54
9.7.3 Change of consumables as applicable . 54
9.7.4 Preventive/routine maintenance of components of the analyser . 54
9.8 Data handling and data reports . 54
9.9 Measurement uncertainty . 54
10 Expression of results . 55
11 Test reports and documentation . 55
11.1 Type testing . 55
11.2 Field operation . 57
11.2.1 Suitability evaluation . 57
11.2.2 Documentation . 57
11.2.3 Ambient air quality data reports . 57
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Annex A (normative) Test of lack-of-fit . 58
A.1 Establishment of the regression line . 58
A.2 Calculation of the residuals of the averages . 58
Annex B (informative) Sampling equipment . 60
Annex C (informative) Schematics of non-dispersive infrared spectrometer . 62
Annex D (informative) Manifold testing . 64
Annex E (normative) Type testing. 66
E.1 Type testing and uncertainty calculation . 66
E.1.1 Type testing . 66
E.1.2 Uncertainty calculation . 66
E.2 Type testing Requirement a) . 66
E.3 Type testing Requirement b) . 68
E.3.1 General . 68
E.3.2 Calculation of standard uncertainties . 71
E.3.3 Example calculation . 78
E.4 Type testing Requirement c) . 80
E.5 Type testing Requirement d) . 80
E.5.1 General . 80
E.5.2 Combined standard uncertainty . 82
E.5.3 Absolute expanded uncertainty . 82
E.5.4 Relative expanded uncertainty . 83
E.5.5 Calculation of standard uncertainties . 83
E.5.6 Example calculation . 85
Annex F (informative) Calculation of uncertainty in field operation at the 8-hour limit value . 87
F.1 General . 87
F.2 Combined standard uncertainty . 87
F.3 Standard uncertainties . 88
F.3.1 General . 88
F.3.2 Influence quantities . 89
F.3.3 Interferents . 91
F.3.4 Averaging effect . 92
F.3.5 Reproducibility under field conditions . 92
F.3.6 Long-term drift at zero . 93
F.3.7 Long-term drift at level of the 8-hour limit value . 93
F.3.8 Zero gas . 93
F.3.9 Calibration gas . 93
F.3.10 Difference sample/calibration port . 93
F.4 Example calculation . 94
Annex G (informative) Test stand for the test point "sensitivity coefficient of sample gas
pressure" . 96
Annex H (informative) Significant changes . 98
Bibliography . 99
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European foreword
This document (prEN 14626:2022) has been prepared by Technical Committee CEN/TC 264 “Air quality,
the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 14626:2012.
In comparison with the previous edition, the technical modifications made are listed in Annex H of this
document.
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oSIST prEN 14626:2022
prEN 14626:2022 (E)
1 Scope
This document 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 document describes the performance characteristics and sets the relevant minimum
criteria required to select an appropriate non-dispersive infrared spectroscopic analyser by means
of type testing. 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 requirements and requirements during sampling, calibration and
quality assurance for use.
NOTE 1 Additional information is specified in Annex I of Directive 2008/50/EC [1]
The method is applicable to the determination of the mass concentration of carbon monoxide present in
3
ambient air up to 100 mg/m of carbon monoxide. This concentration range represents the certification
range for type testing.
NOTE 2 Other ranges can be used depending on the levels present in ambient air.
NOTE 3 When the standard is used for other purposes than for measurements required by Directive
2008/50/EC, the ranges and uncertainty requirements might not apply.
The method covers the determination of ambient air concentrations of carbon monoxide in locations
classified as rural areas, urban-background areas, and for sampling points influenced by traffic
or industrial sources.
3
The results are expressed in mg/m (at 20 °C and 101,3 kPa).
3
NOTE 4 100 mg/m of CO corresponds to 86 µmol/mol of CO.
This document contains information for different groups of users.
Clause 5 to Clause 7 and Annex B, Annex C and Annex D contain general information about the principles
of carbon monoxide measurement by non-dispersive infrared spectroscopic analyser and sampling
equipment.
Clause 8 and Annex E are specifically directed towards test houses and laboratories that perform type
testing of carbon monoxide analysers. These sections contain information about:
 type testing conditions, test procedures and test requirements;
 analyser performance requirements;
 evaluation of the type testing results;
 evaluation of the uncertainty of the measurement results of the carbon monoxide analyser based
on the type testing results.
Clause 9 to Clause 11 and Annex F are directed towards monitoring networks performing the practical
measurements of carbon monoxide 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;
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 calculation and reporting of measurement results;
 evaluation of the uncertainty of measurement results under practical monitoring conditions.
The present document represents an evolution of earlier editions (EN 14626:2005 and EN 14626:2012).
When equipment is procured it complies fully with the present document.
NOTE 5 Type testing performed prior to the publication of this document for the purpose of demonstrating
equivalence are still valid.
NOTE 6 Analysers type tested prior to the publication of this document remain valid for use for regulated
monitoring purposes.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, 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 manufacturer’s 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 mixtures (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 orif
...