EN IEC 60746-4:2019
(Main)Expression of performance of electrochemical analyzers - Part 4: Dissolved oxygen in water measured by membrane-covered amperometric sensors
Expression of performance of electrochemical analyzers - Part 4: Dissolved oxygen in water measured by membrane-covered amperometric sensors
This part of IEC 60746 is intended: - to specify terminology, definitions and requirements for statements by manufacturers for analyzers, sensor units and electronic units used for the determination of dissolved oxygen partial pressure or concentration; - to establish performance tests for such analyzers, sensor units and electronic units; - to provide basic documents to support the applications of quality assurance standards [1]1. This document applies to analyzers using membrane covered amperometric sensors. It applies to analyzers suitable for use in water containing liquids, ultrapure waters, fresh or potable water, sea water or other aqueous solutions, industrial or municipal waste water from water bodies (e.g. lakes, rivers, estuaries), as well as for industrial process streams and process liquids. Whilst in principle amperometric oxygen-analyzers are applicable in gaseous phases, the expression of performance in the gas phase is outside the scope of this document. This document is applicable to analyzers specified for permanent installation in any location (indoors or outdoors) using membrane-covered amperometric sensors.
Angabe zum Betriebsverhalten von elektrochemischen Analysatoren - Teil 4: Gelöster Sauerstoff in Wasser mit Hilfe membranbedeckter amperometrischer Messzellen
Expression des qualités de fonctionnement des analyseurs électrochimiques - Partie 4: Oxygène dissous dans l'eau mesuré par des capteurs ampérométriques recouverts d'une membrane
La présente partie de l'IEC 60746 a pour but: - de spécifier la terminologie, les définitions et les exigences relatives aux indications données par les fabricants d'analyseurs, de détecteurs et d'unités électroniques utilisés pour la détermination de la pression partielle ou de la concentration d'oxygène dissous; - d'établir des essais de qualité de fonctionnement pour ces analyseurs, détecteurs et unités électroniques; - de fournir des documents de base dans le cadre de l'application des normes d'assurance qualité [1]1. Le présent document s'applique aux analyseurs qui utilisent des capteurs ampérométriques recouverts d'une membrane. Il s'applique aux analyseurs convenant à une utilisation dans es liquides aqueux, l'eau extrapure, l'eau douce ou potable, l'eau de mer ou toute autre solution aqueuse, les eaux usées industrielles ou urbaines provenant de plans d'eau (lacs, rivières, estuaires, par exemple), ainsi que les effluents industriels et les liquides de process. Bien que les analyseurs d'oxygène ampérométriques s'appliquent en principe aux phases gazeuses, l'expression de leurs qualités de fonctionnement dans la phase gazeuse ne relève pas du domaine d'application du présent document. Le présent document s'applique aux analyseurs spécifiés en vue d'une installation permanente en tout lieu (en intérieur et en extérieur), qui utilisent des capteurs ampérométriques recouverts d'une membrane.
Izražanje lastnosti elektrokemičnih analizatorjev - 4. del: Raztopljeni kisik v vodi merjen z membranskimi amperometričenimi celicami (IEC 60746-4:2018)
Ta del standarda IEC 60746:
• določa terminologijo, definicije in zahteve za navedbe proizvajalcev za analizatorje, senzorne enote in elektronske enote, ki se uporabljajo za določanje delnega tlaka ali koncentracije raztopljenega kisika;
• določa zahteve glede preskusov lastnosti teh analizatorjev, senzornih in elektronskih enot;
• zagotavlja osnovne dokumente za podporo uporabe standardov za zagotavljanje kakovosti [1]1.
Ta dokument se uporablja za analizatorje z membranskimi amperometričnimi celicami. Velja za analizatorje, primerne za uporabo v tekočinah, ki vsebujejo vodo, ultra čistih vodah, sladki ali pitni vodi, morski vodi ali drugih vodnih raztopinah, industrijskih ali gospodinjskih odpadnih vodah iz vodnih teles (npr. jezer, rek, ustij) ter za industrijske procesne tokove in procesne tekočine. Čeprav se amperometrični analizatorji kisika načeloma uporabljajo v plinastih fazah, izražanje lastnosti v plinasti fazi ni predmet tega dokumenta.
Ta dokument se uporablja za analizatorje, ki so določeni za stalno namestitev na katerem koli mestu (znotraj ali zunaj) z uporabo membranskih amperometričnih celic.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2019
Izražanje lastnosti elektrokemičnih analizatorjev - 4. del: Raztopljeni kisik v vodi
merjen z membranskimi amperometričenimi celicami (IEC 60746-4:2018)
Expression of performance of electrochemical analyzers - Part 4: Dissolved oxygen in
water measured by membrane covered amperometric sensors (IEC 60746-4:2018)
Angabe zum Betriebsverhalten von elektrochemischen Analysatoren - Teil 4: Gelöster
Sauerstoff in Wasser mit Hilfe membranbedeckter amperometrischer Messzellen (IEC
60746-4:2018)
Expression des qualités de fonctionnement des analyseurs électrochimiques - Partie 4:
Oxygène dissous dans l'eau mesuré par des capteurs ampérométriques recouverts
d'une membrane (IEC 60746-4:2018)
Ta slovenski standard je istoveten z: EN IEC 60746-4:2019
ICS:
19.080 Električno in elektronsko Electrical and electronic
preskušanje testing
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 60746-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2019
ICS 71.040.40; 19.080
English Version
Expression of performance of electrochemical analyzers - Part 4:
Dissolved oxygen in water measured by membrane-covered
amperometric sensors
(IEC 60746-4:2018)
Expression des qualités de fonctionnement des analyseurs Angabe zum Betriebsverhalten von elektrochemischen
électrochimiques - Partie 4: Oxygène dissous dans l'eau Analysatoren - Teil 4: Gelöster Sauerstoff in Wasser mit
mesuré par des capteurs ampérométriques recouverts Hilfe membranbedeckter amperometrischer Messzellen
d'une membrane (IEC 60746-4:2018)
(IEC 60746-4:2018)
This European Standard was approved by CENELEC on 2019-01-17. 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 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60746-4:2019 E
European foreword
The text of document 65B/1128/FDIS, future edition 2 of IEC 60746-4, prepared by SC 65B
"Measurement and control devices" of IEC/TC 65 "Industrial-process measurement, control and
automation" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2019-10-17
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-01-17
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60746-4:2018 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
ISO 9001 NOTE Harmonized as EN ISO 9001
ISO 5814:2012 NOTE Harmonized as EN ISO 5814:2012 (not modified)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60746-1 2003 Expression of performance of electrochemical EN 60746-1 2003
analyzers - Part 1: General
IEC 60746-4 ®
Edition 2.0 2018-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Expression of performance of electrochemical analyzers –
Part 4: Dissolved oxygen in water measured by membrane-covered
amperometric sensors
Expression des qualités de fonctionnement des analyseurs électrochimiques –
Partie 4: Oxygène dissous dans l'eau mesuré par des capteurs ampérométriques
recouverts d'une membrane
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.080; 71.040.40 ISBN 978-2-8322-6274-0
– 2 – IEC 60746-4:2018 © IEC 2018
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
3.1 Oxygen sensor properties . 7
3.2 Electronics . 7
3.3 Measurement units and solubility of oxygen . 8
3.4 Test media . 9
4 Influence quantities for membrane covered amperometric sensors . 9
4.1 Temperature . 9
4.2 Pressure . 9
4.3 Dissolved substances . 9
4.4 Flow . 9
5 Procedure for specification . 9
5.1 Zero and span drift . 9
5.2 Additional specifications for the sensor unit . 10
5.2.1 Electrode and sensor materials . 10
5.2.2 Dimensions of the sensor . 10
5.2.3 Permitted temperature and pressure range . 10
5.2.4 Temperature measurement and temperature compensation . 10
5.2.5 Pressure compensation . 10
5.2.6 Zero current . 10
5.2.7 Sensor sensitivity . 10
5.2.8 Stabilization time . 10
5.2.9 Oxygen consumption . 10
5.2.10 Flow rate . 10
5.2.11 Method and extent of sensor regeneration . 10
6 Recommended standard values and ranges of influence quantities affecting the
performance of electronic units . 10
7 Verification of values . 11
7.1 General . 11
7.1.1 General aspects of verification of values . 11
7.1.2 Testing procedure for linearity of the electronic unit . 11
7.1.3 Rated reference conditions for testing . 11
7.2 Simulator for testing electronic units . 11
7.3 Calibration solutions . 11
7.4 Testing procedures for complete analyzer (sensor unit connected to
electronic unit) . 11
7.4.1 Intrinsic uncertainty . 11
7.4.2 Linearity uncertainty . 11
7.4.3 Repeatability . 12
7.4.4 Interference uncertainty (whole analyzer) . 12
7.4.5 Zero drift and span drift . 12
7.4.6 Output fluctuation of the analyzer . 12
7.4.7 Delay times T and 90 % rise or fall times T . 13
10 90
7.4.8 Temperature compensation . 13
7.4.9 Operating uncertainty of the whole analyzer . 14
IEC 60746-4:2018 © IEC 2018 – 3 –
7.4.10 Determination of the sensor unit residual signal . 14
7.4.11 Oxygen consumption . 14
Annex A (informative) Supplementary general information on amperometric oxygen
sensors . 15
A.1 Sensors' performance characteristics . 15
A.2 Precautions . 16
A.3 Sensor calibration techniques . 16
Annex B (informative) Technique for the preparation of batch calibration standards by
the saturation approach [10] . 18
Annex C (informative) Calibration solutions for low levels of oxygen in water
measurement . 19
C.1 System development [10] . 19
C.2 Description and operation of the system . 19
C.3 Further developments . 19
Bibliography . 25
Figure C.1 – Laboratory rig to produce water with a low level of dissolved oxygen . 21
Figure C.2 – Complete system for laboratory testing dissolved oxygen monitor . 22
Figure C.3 – Dimensions of block A . 23
Figure C.4 – Dimensions of block B . 24
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