IEC 61207-3:2019

IEC 61207-3 ®
Edition 3.0 2019-06
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Gas analyzers – Expression of performance –
Part 3: Paramagnetic oxygen analyzers

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IEC 61207-3 ®
Edition 3.0 2019-06
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Gas analyzers – Expression of performance –

Part 3: Paramagnetic oxygen analyzers

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.040; 71.040.40 ISBN 978-2-8322-7117-9

– 2 – IEC 61207-3:2019 RLV © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope and object . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Procedures for specification . 16
4.1 General . 16
4.2 Specification of essential ancillary units and services . 16
4.2.1 Sampling system . 16
4.2.2 Services . 16
4.3 Additional characteristics related to specification of performance . 17
4.4 Important aspects related to specification of performance . 17
4.4.1 General . 17
4.4.2 Rated range of ambient temperature . 17
4.4.3 Rated range of sample gas temperature . 17
4.4.4 Rated range of ambient pressure . 18
4.4.5 Rated range of sample pressure . 18
4.4.6 Rated range of sample flow . 18
4.4.7 Rated range of sample dew point . 18
4.4.8 Rated range of sample particulate content . 18
4.4.9 Rated range of interference errors uncertainties . 19
4.4.10 Rated range of linearity error uncertainty . 19
4.4.11 Rated ranges of influence quantities . 19
5 Procedures for compliance testing . 19
5.1 Introduction Analyzer testing . 19
5.1.1 General . 19
5.1.2 Test equipment . 19
5.2 Testing procedures . 20
5.2.1 General . 20
5.2.2 Interference error uncertainty . 20
5.2.3 Wet samples . 21
5.2.4 Delay times, rise time, fall time . 21
Annex A (informative) Interfering gases . 23
Annex B (informative) Methods of preparation of water vapour in test gases . 27
Bibliography . 29

Figure 1 – Magnetic auto-balance system with current feedback . 10
Figure 2 – Thermomagnetic oxygen sensor . 11
Figure 3 – Differential pressure oxygen sensor . 12
Figure 4 – Typical sampling systems – Filtered and dried system with pump for wet
samples . 14
Figure 5 – Typical sampling system – Steam-aspirated system with water wash for wet
samples . 15
Figure 6 – General test arrangement – Dry gases . 20
Figure 7 – Test apparatus to apply gases and water vapour to analysis systems . 22

Table A.1 – Zero correction factors for current gases . 23

– 4 – IEC 61207-3:2019 RLV © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GAS ANALYZERS –
EXPRESSION OF PERFORMANCE –
Part 3: Paramagnetic oxygen analyzers

FOREWORD
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International Standard IEC 61207-3 has been prepared by sub-committee 65B: Measurement
and control devices, of IEC technical committee 65: Industrial-process measurement, control
and automation.
This third edition cancels and replaces the second edition published in 2002. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) all references (normative and informative) have been updated, deleted or added to as
appropriate;
b) all the terms, descriptions and definitions relating to the document have been updated
where appropriate;
c) all references to “errors” have been replaced by “uncertainties” and appropriate updated
definitions applied.
The text of this International Standard is based on the following documents:
FDIS Report on voting
65B/1155/FDIS 65B/1157/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
This International Standard is to be used in conjunction with IEC 61207-1:2010.
A list of all parts in the IEC 61207 series, published under the general title Gas analyzers –
Expression of performance, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.

– 6 – IEC 61207-3:2019 RLV © IEC 2019
INTRODUCTION
Paramagnetic oxygen analyzers respond to the partial pressure of oxygen in the measured
gas, and not the volumetric concentration is then determined by knowledge of the total
pressure, as in many other gas analyzers. Due to this fact, many paramagnetic oxygen
analyzers use pressure
...