CEN/TS 17021:2017

SLOVENSKI STANDARD
01-julij-2017
(PLVLMHQHSUHPLþQLKYLURY'RORþHYDQMHPDVQHNRQFHQWUDFLMHåYHSORYHJDGLRNVLGD
]LQVWUXPHQWDOQLPLWHKQLNDPL
Stationary source emissions - Determination of the mass concentration of sulphur
dioxide by instrumental techniques
Emissionen aus stationären Quellen - Ermittlung der Massenkonzentration von
Schwefeldioxid mit instrumentellen Verfahren
Émissions de sources fixes - Mesurage des émissions de dioxyde de soufre par des
techniques instrumentales
Ta slovenski standard je istoveten z: CEN/TS 17021:2017
ICS:
13.040.40 (PLVLMHQHSUHPLþQLKYLURY Stationary source emissions
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17021
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
January 2017
TECHNISCHE SPEZIFIKATION
ICS 13.040.40
English Version
Stationary source emissions - Determination of the mass
concentration of sulphur dioxide by instrumental
techniques
Émissions de sources fixes - Détermination de la Emissionen aus stationären Quellen - Ermittlung der
concentration massique en dioxyde de soufre par des Massenkonzentration von Schwefeldioxid mit
techniques instrumentales instrumentellen Verfahren
This Technical Specification (CEN/TS) was approved by CEN on 23 October 2016 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

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,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17021:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols and abbreviations . 11
4.1 Symbols . 11
4.2 Abbreviated terms . 12
5 Principle . 12
5.1 General . 12
5.2 Measuring principle . 12
6 Description of the measuring system . 13
6.1 General . 13
6.2 Sampling and sample gas conditioning system . 14
6.3 Analyser equipment . 16
7 Performance characteristics of the method . 16
8 Suitability of the measuring system for the measurement task . 18
9 Field operation . 18
9.1 Measurement section and measurement plane . 18
9.2 Sampling strategy. 19
9.3 Choice of the measuring system . 19
9.4 Setting of the measuring system on site . 20
10 Ongoing quality control . 22
10.1 Introduction . 22
10.2 Frequency of checks . 22
11 Expression of results . 23
12 Measurement report . 23
Annex A (informative) Example of uncertainty estimation for the method and compliance
with required emissions measurement uncertainty . 24
A.1 General . 24
A.2 Elements required for the uncertainty determinations . 24
A.3 Example uncertainty budget . 27
A.4 Evaluation of compliance with a required measurement uncertainty . 32
Annex B (informative) Calculation of the uncertainty associated with a concentration
expressed under dry conditions and at an oxygen reference concentration . 34
B.1 Uncertainty associated with a concentration expressed under dry conditions. 34
B.2 Uncertainty associated with a concentration expressed at a O reference
concentration . 36
Annex C (normative) Annual lack of fit test . 38
C.1 Description of test procedure . 38
C.2 Establishment of the regression line . 38
C.3 Calculation of the residuals . 39
C.4 Test requirements . 39
Annex D (informative) Annual check of conditioning system . 40
D.1 General . 40
D.2 Demonstration via proficiency testing scheme participation . 40
D.3 Demonstration via direct user testing of conditioning system . 40
Annex E (informative) Procedure for correction of data from drift effect. 42
Annex F (informative) Chemistry of SO aqueous solubility . 44
Bibliography . 45

European foreword
This document (CEN/TS 17021:2017) has been prepared by Technical Committee CEN/TC 264 “Air
quality”, the secretariat of which is held by DIN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to announce this Technical Specification: 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, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This Technical Specification describes a method for sampling and determining the concentration of
gaseous sulphur dioxide (SO ) emissions from stacks. This method is based on instrumental techniques.
It is applicable to both periodic measurements and the calibration of automated measuring systems
permanently installed on stacks, for regulatory or other purposes.
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, the latest edition of the referenced document (including any amendments) applies.
EN 15259:2007, Air quality - Measurement of stationary source emissions - Requirements for
measurement sections and sites and for the measurement objective, plan and report
EN 14793:2016, Stationary source emission - Demonstration of equivalence of an alternative method with
a reference method
EN 15267-4, Air quality - Certification of automated measuring systems - Part 4: Performance criteria and
test procedures for automated measuring systems for periodic measurements of emissions from stationary
sources
EN ISO 14956:2002, Air quality - Evaluation of the suitability of a measurement procedure by comparison
with a required measurement uncertainty (ISO 14956:2002)
ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in
measurement (GUM:1995)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
standard reference method
SRM
reference method prescribed by European or national legislation
[SOURCE: EN 15259:2007]
3.2
reference method
RM
measurement method taken as a reference by convention, which gives the accepted reference value of
the measurand
NOTE 1 A reference method is fully described.
NOTE 2 A reference method can be a manual or an automated method.
NOTE 3 Alternative methods can be used if equivalence to the reference method has been demonstrated.
[SOURCE: EN 15259:2007]
3.3
alternative method
AM
measurement method which complies with the criteria given by this Technical Specification with
respect to the reference method
Note 1 to entry: An alternative method can consist of a simplification of the reference method.
[SOURCE: EN 14793:2017]
3.4
measuring system
set of one or more measuring instruments and often other devices, including any reagent and supply,
assembled and adapted to give information used to generate measured quantity values within specified
intervals for quantities of specified kinds
[SOURCE: JCGM 200:2012]
3.5
automated measuring system
AMS
entirety of all measuring instruments and additional devices for obtaining a result of measurement
Note 1 to entry: Apart from the actual measuring device (the analyser), an AMS includes facilities for taking
samples (e.g. probe, sample gas lines, flow meters and regulator, delivery pump) and for sample conditioning (e.g.
dust filter, pre-separator for interferents, cooler, converter). This definition also includes testing and adjusting
devices that are required for functional checks and, if applicable, for commissioning.
Note 2 to entry: The term “automated measuring system” (AMS) is typically used in Europe. The term
“continuous emission monitoring system” (CEMS) is also typically used in the
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