IEC 61207-7:2013

IEC 61207-7 ®
Edition 1.0 2013-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Expression of performance of gas analyzers –
Part 7: Tuneable semiconductor laser gas analyzers

Expression des performances des analyseurs de gaz –
Partie 7: Analyseurs de gaz laser à semiconducteurs accordables

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IEC 61207-7 ®
Edition 1.0 2013-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Expression of performance of gas analyzers –

Part 7: Tuneable semiconductor laser gas analyzers

Expression des performances des analyseurs de gaz –

Partie 7: Analyseurs de gaz laser à semiconducteurs accordables

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 19.040; 71.040.40 ISBN 978-2-8322-1117-5

– 2 – 61207-7  IEC:2013
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Procedure for specification . 10
4.1 General . 10
4.2 In situ analyzers . 10
4.2.1 Additional operation and maintenance requirements . 10
4.2.2 Additional terms related to the specification of performance . 10
4.2.3 Additional limits of uncertainties . 11
4.3 Extractive analyzers . 11
4.3.1 Additional operation and maintenance requirements . 11
4.3.2 Additional terms related to the specification of performance . 12
4.4 Recommended standard values and range of influence quantities . 12
4.5 Laser safety . 12
5 Procedures for compliance testing . 12
5.1 In situ analyzers . 12
5.1.1 General . 12
5.1.2 Apparatus to simulate measurement condition . 13
5.1.3 Apparatus to generate test gas mixture . 13
5.1.4 Apparatus to investigate the attenuation induced by opaque dust,
liquid droplets and other particles . 13
5.1.5 Testing procedures . 14
5.2 Extractive analyzers . 16
5.2.1 General . 16
5.2.2 Apparatus to generate test gas mixture . 16
5.2.3 Testing procedures . 16
Annex A (informative) Systems of tuneable semiconductor laser gas analyzers . 18
Annex B (normative) Examples of the test apparatus . 19
Bibliography . 23

Figure A.1 – Tuneable semiconductor laser gas analyzers . 18
Figure B.1 – Example of a test apparatus to simulate measurement condition for
across-duct and open-path analyzers . 19
Figure B.2 – Example of a test apparatus to simulate measurement condition for probe
type analyzers . 19
Figure B.3 – Example of apparatus to generate the test gas mixture . 20
Figure B.4 – Delay time, rise time and fall time . 21
Figure B.5 – Example of a grid to simulate the attenuation by the dust in optical path . 22

61207-7  IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPRESSION OF PERFORMANCE OF GAS ANALYZERS –

Part 7: Tuneable semiconductor laser gas analyzers

FOREWORD
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61207-7 has been prepared by subcommittee 65B: Measurement
and control devices, of IEC technical committee 65: Industrial-process measurement, control
and automation.
The text of this standard is based on the following documents:
FDIS Report on voting
65B/876/FDIS 65B/891/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This International Standard is to be used in conjunction with IEC 61207-1:2010.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 61207-7  IEC:2013
A list of all parts of the IEC 61207 series, under the general title Expression of performance of
gas analyzers, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of June 2015 have been included in this copy.
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