ISO 29042-2:2009

Safety of machinery — Evaluation of the emission of airborne hazardous substances — Part 2: Tracer gas method for the measurement of the emission rate of a given pollutant

ISO 29042-2:2009 specifies a method using tracer gas techniques to enable measurement of the emission rates of gaseous substances from a single machine whose operation can be controlled.

Sécurité des machines — Évaluation de l'émission de substances dangereuses véhiculées par l'air — Partie 2: Méthode par gaz traceur pour le mesurage du taux d'émission d'un polluant donné

General Information

• Status: Published
• Publication Date: 10-Feb-2009
• ICS: 13.110 - Safety of machinery
• Technical Committee: ISO/TC 199 - Safety of machinery
• Drafting Committee: ISO/TC 199 - Safety of machinery
• Current Stage: 9020 - International Standard under periodical review
• Start Date: 15-Jul-2024
• Completion Date: 15-Jul-2024

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 29042-2
First edition
2009-02-15
Safety of machinery — Evaluation of the
emission of airborne hazardous
substances —
Part 2:
Tracer gas method for the measurement
of the emission rate of a given pollutant
Sécurité des machines — Évaluation de l'émission de substances
dangereuses véhiculées par l'air —
Partie 2: Méthode par gaz traceur pour le mesurage du taux d'émission
d'un polluant donné
Reference number
©
ISO 2009
PDF disclaimer
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©  ISO 2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
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Published in Switzerland
ii © ISO 2009 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 29042-2 was prepared by Technical Committee ISO/TC 199, Safety of machinery.
ISO 29042 consists of the following parts, under the general title Safety of machinery — Evaluation of the
emission of airborne hazardous substances:
⎯ Part 1: Selection of test methods
⎯ Part 2: Tracer gas method for the measurement of the emission rate of a given pollutant
⎯ Part 3: Test bench method for the measurement of the emission rate of a given pollutant
⎯ Part 4: Tracer method for the measurement of the capture efficiency of an exhaust system
The following parts are under preparation:
⎯ Part 5: Test bench method for the measurement of the separation efficiency by mass of air cleaning
systems with unducted outlet
⎯ Part 6: Test bench method for the measurement of the separation efficiency by mass of air cleaning
systems with ducted outlet
⎯ Part 7: Test bench method for the measurement of the pollutant concentration parameter
A room method for the measurement of the pollutant concentration parameter and a decontamination index
are to form the subjects of future parts 8 and 9.
Introduction
The structure of safety standards in the field of machinery is as follows:
a) type-A standards (basic safety standards) giving basic concepts, principles for design, and general
aspects that can be applied to all machinery;
b) type-B standards (generic safety standards) dealing with one safety aspect or one type of safeguard that
can be used across a wide range of machinery:
⎯ type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature, noise);
⎯ type-B2 standards on safeguards (e.g. two-hand controls, interlocking devices, pressure-sensitive
devices, guards);
c) type-C standards (machine safety standards) dealing with detailed safety requirements for a particular
machine or group of machines.
This part of ISO 29042 is a type-B standard as stated in ISO 12100-1.
The requirements of this document can be supplemented or modified by a type-C standard.
For machines which are covered by the scope of a type-C standard and which have been designed and built
according to the requirements of that standard, the requirements of that type-C standard take precedence.
ISO/TC 199 has a mandate in this area to produce type-A and type-B standards, which will allow verification of
conformity with the essential safety requirements.
ISO 29042-2 is based on EN 1093-2:2006, amended by Amendment 1:2008, published by the European
Committee for Standardization (CEN).
iv © ISO 2009 – All rights reserved

INTERNATIONAL STANDARD ISO 29042-2:2009(E)

Safety of machinery — Evaluation of the emission of airborne
hazardous substances —
Part 2:
Tracer gas method for the measurement of the emission rate of
a given pollutant
1 Scope
This part of ISO 29042 specifies a method using tracer gas techniques to enable measurement of the
emission rates of gaseous substances from a single machine whose operation can be controlled.
It is not applicable to machinery manufactured before the date of publication of this part of ISO 29042.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
terminology, methodology
ISO 29042-1:2008, Safety of machinery — Evaluation of the emission of airborne hazardous substances —
Part 1: Selection of test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100-1 and ISO 29042-1 and the
following apply.
3.1
tracer gas technique
use of gaseous substances with an aerodynamic behaviour comparable with the gaseous hazardous
substance under consideration and for which concentrations can be reliably measured
4 Principle
The principle is based on the use of a tracer gas generated at a known and constant emission rate to provide
the best representation of the pollutant source. The mean tracer gas and pollutant concentrations are
measured in the vicinity of the source. Assuming that the aerodynamic behaviour of the pollutant is equal to
that of the tracer gas, the pollutant emission rate can be determined.
5 Location of the machine
5.1 General
The method is intended to be used for a machine located either in a test room or in the field.
5.2 Room method
The general airflow patterns in the test room should be characterized to enable more precise control of the
general and local ventilation to be achieved. The machine should be placed in the centre of the room.
5.3 Field method
Many machines cannot be tested in a test room because they are too large, too difficult to handle or have
special installation or process requirements. Tests may be performed on machines in the places where they
are installed, i.e. the workplace. For this purpose, it shall be ensured that pollutants from other emission
sources present in the room shall not affect the measurements of the concentrations of the specific pollutant
emitted from the machine under test.
6 Apparatus and materials
6.1 Tracer gas emitter, capable of providing a release of the tracer gas in the same manner as the
pollutant emission.
The shape of the emitter should resemble the shape of the real pollutant source. A distinction is generally
drawn between
⎯ point sources (e.g. welding operations, localized leaks from gaskets and flanges, localized spraying, such
as a painting jet),
⎯ plane sources (e.g. open vessel or tank containing liquid or melted solid liable to evaporate or sublimate,
such as galvanizing baths and electroplating baths), and
⎯ volumetric sources (e.g. closed machine with distributed leaks, rubber making machine, printing machine,
degreaser, dry-cleaning machine, diffuse spraying such as plant-care products in agriculture).
Point sources should be simulated by opened tubes producing jets of variable aerodynamic characteristics or
by sintered materials diffusing the tracer gas at a low initial velocity. Plane and volumetric sources should be
simulated by a network of point sources or perforated tubes that are suitably distributed.
6.2 Tracer gas flow rate measuring device, capable of measuring tracer gas flow rates in the appropriate
range.
NOTE The tracer gas flow rate depends on the sensitivity of the tracer gas analyser. For most applications, a device
−1 −1
calibrated to measure flo
...

DRAFT INTERNATIONAL STANDARD ISO/DIS 29042-2
ISO/TC 199 Secretariat: DIN
Voting begins on: Voting terminates on:
2007-06-12 2007-11-12
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Safety of machinery — Evaluation of the emission of airborne
hazardous substances —
Part 2:
Tracer gas method for the measurement of the emission rate of
a given pollutant
Sécurité des machines — Évaluation de l'émission de substances dangereuses véhiculées par l'air —
Partie 2: Méthode par gaz traceur pour le mesurage du taux d'émission d'un polluant donné
ICS 13.110
In accordance with the provisions of Council Resolution 15/1993 this document is circulated in
the English language only.
Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est distribué
en version anglaise seulement.
To expedite distribution, this document is circulated as received from the committee secretariat.
ISO Central Secretariat work of editing and text composition will be undertaken at publication
stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
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.
©
International Organization for Standardization, 2007

ISO/DIS 29042-2
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall
not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the
unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user's country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying,
recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO's
member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
©
ii ISO 2007 – All rights reserved

ISO/DIS 29042-2
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Principle .1
5 Location of the machine .2
5.1 General .2
5.2 Test room method .2
5.3 Field method .2
6 Apparatus and materials.2
7 Measurement points.3
8 Procedure.4
9 Data analysis.5
10 Expression of results.5
11 Test report.7

ISO/DIS 29042-2
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 29042-2 was prepared by Technical Committee ISO/TC 199, Safety of machinery.
ISO 29042 consists of the following parts, under the general title Safety of machinery — Evaluation of the
emission of airborne hazardous substances:
1)
⎯ Part 1: Selection of test methods
⎯ Part 2: Tracer gas method for the measurement of the emission rate of a given pollutant
1);
⎯ Part 3: Test bench method for the measurement of the emission rate of a given pollutant
1)
⎯ Part 4: Tracer method for the measurement of the capture efficiency of an exhaust system ;
⎯ Part 5: Test bench method for the measurement of the separation efficiency by mass of air cleaning
1)
systems with unducted outlet ;
⎯ Part 6: Test bench method for the measurement of the separation efficiency by mass of air cleaning
1)
systems with ducted outlet ;
1)
⎯ Part 7: Test bench method for the measurement of the pollutant concentration parameter ;
1)
⎯ Part 8: Room method for the measurement of the pollutant concentration parameter ;
1)
⎯ Part 9: Decontamination index .

1) In preparation.
iv © ISO 2007 – All rights reserved

ISO/DIS 29042-2
Introduction
The structure of safety standards in the field of machinery is as follows:
⎯ Type-A standards (basic safety standards) giving basic concepts, principles for design, and general
aspects that can be applied to all machinery;
⎯ Type-B standards (generic safety standards) dealing with one safety aspect or one type of safeguard
that can be used across a wide range of machinery:
⎯ Type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature, noise);
⎯ Type-B2 standards on safeguards (e.g. two-hand controls, interlocking devices, pressure sensitive
devices, guards);
⎯ Type-C standards (machine safety standards) dealing with detailed safety requirements for a particular
machine or group of machines.
This part of ISO 29042 is a type-B standard as stated in ISO 12100-1.
The provisions of this document can be supplemented or modified by a type-C standard.
When provisions of a type-C standard are different from those which are stated in type-A or type-B standards,
the provisions of the type-C standard take precedence over the provisions of the other standards for machines
that have been designed and built according to the provisions of the type-C standard.
ISO/TC 199 has a mandate in this area to produce type-A and type-B standards, which will allow verification of
conformity with the essential safety requirements.
ISO 29042-2 is based on EN 1093-2:2006, published by the European Committee for Standardization (CEN).
DRAFT INTERNATIONAL STANDARD ISO/DIS 29042-2

Safety of machinery — Evaluation of the emission of airborne
hazardous substances — Part 2: Tracer gas method for the
measurement of the emission rate of a given pollutant
1 Scope
This document specifies a method to enable measurements of the emission rates of gaseous substances from
a single machine, whose operation can be controlled, using tracer gas techniques.
This document is not applicable to machinery which are manufactured before the date of its publication as ISO.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 12100-1:2003, Safety of machinery – Basic concepts, general principles for design – Part 1: Basic
terminology, methodology
1)
ISO 29042-1 , Safety of machinery – Evaluation of the emission of airborne hazardous substances – Part 1:
Selection of test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100-1:2003, ISO 29042-1 and the
following apply.
3.1
tracer gas technique
the use of gaseous substances with an aerodynamic behaviour comparable with the gaseous hazardous
substance under consideration and for which concentrations can be reliably measured
4 Principle
The principle is based on the use of a tracer gas generated at a known and constant emission rate to provide
the best representation of the pollutant source. The mean tracer gas and pollutant concentrations are
measured in the vicinity of the source. Assuming that the aerodynamic behaviour of the pollutant is equal to
that of the tracer gas, the pollutant emission rate can be determined.
ISO/DIS 29042-2
5 Location of the machine
5.1 General
The method is intended for use for a machine located either in a test room or in the field.
5.2 Test room method
The general airflow patterns in the test room should be characterised to enable more precise control of the
general and local ventilation to be achieved. The machine should be placed in the centre of the room.
5.3 Field method
Many machines cannot be tested in a test room because they are too large, too difficult to handle or have
special installation or process requirements. Tests may be performed on machines in the places where they
are installed, i.e. the workplace. For this purpose, it shall be ensured that pollutants from other emission
sources present in the room shall not affect the measurements of the concentrations of the specific pollutant
emitted from the machine under test.
6 Apparatus and materials
6.1 Tracer gas emitter, capable of providing a release of the tracer gas in the same manner as the
pollutant emission.
The shape of the emitter should resemble the shape of the real pollutant source. A distinction is generally
drawn between:
⎯ point sources (e.g. welding operations, localised leaks from gaskets, flanges, localised spraying, such as
painting jet);
⎯ plane sources (e.g. open vessel or tank containing liquid or melted solid liable to evaporate or sublimate,
such as galvanising baths, electroplating baths);
⎯ volumetric sources (e.g. closed machine with distributed leaks, rubber making machine, printing machine,
degreaser, dry cleaning machine, diffuse spraying, such as plant-care products in agriculture).
Point sources should be simulated by opened tubes producing jets of variable aerodynamic characteristics or
by sintered materials diffusing the tracer gas at a low initial velocity. Plane and volumetric sources should be
simulated by a network of point sources or perforated tubes, which are suitably distributed.
6.2 Tracer gas flow rate measuring device, capable of measuring tracer gas flow rates in the appropriate
range.
NOTE The tracer gas flow rate depends on the sensitivity of the tracer gas analyser. For most applications a device
-1 -1
calibrated to measure flow rates in the range from 1 l min to 10 l min is suitable.
6.3 Tracer gas flow rate adjusting device, e.g. a valve.
6.4 Gas analyser(s), preferably direct reading.
An alternati
...