CSA C22.2 No. 62990-1:20

(IEC 62990-1:2019, MOD)

National Standard of Canada Norme nationale du Canada

CSA C22.2 No. 62990-1:20

Workplace atmospheres — Part 1: Gas detectors — Performance requirements of detectors for toxic gases

(IEC 62990-1:2019, MOD)

CSA C22.2 nº 62990-1:20

Atmosphères des lieux de travail — Partie 1 : Détecteurs de gaz — Exigences d’aptitude à la fonction des détecteurs de gaz toxiques (IEC 62990-1:2019, MOD)

© IEC 2019. © Canadian Standards Association 2020. All rights reserved. Unauthorized reproduction is strictly prohibited.

© IEC 2019. © Association canadienne de normalisation 2020. Tous droits réservés. Toute reproduction sans autorisation est strictement interdite.

Legal Notice for Standards

Canadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied viewpoints and interests to achieve consensus and develop a standard. Although CSA Group administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards.

Disclaimer and exclusion of liability

This document is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation, implied warranties or conditions concerning this document’s fitness for a particular purpose or use, its merchantability, or its non-infringement of any third party’s intellectual property rights. CSA Group does not warrant the accuracy, completeness, or currency of any of the information published in this document. CSA Group makes no representations or warranties regarding this document’s compliance with any applicable statute, rule, or regulation.

IN NO EVENT SHALL CSA GROUP, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES, HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESS INTERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA GROUP HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES.

In publishing and making this document available, CSA Group is not undertaking to render professional or other services for or on behalf of any person or entity or to perform any duty owed by any person or entity to another person or entity. The information in this document is directed to those who have the appropriate degree of experience to use and apply its contents, and CSA Group accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained in this document.

CSA Group is a private not-for-profit company that publishes voluntary standards and related documents. CSA Group has no power, nor does it undertake, to enforce compliance with the contents of the standards or other documents it publishes.

Intellectual property rights and ownership

As between CSA Group and the users of this document (whether it be in printed or electronic form), CSA Group is the owner, or the authorized licensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), and all inventions and trade secrets that may be contained in this document, whether or not such inventions and trade secrets are protected by patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this document may violate laws that protect CSA Group’s and/or others’ intellectual property and may give rise to a right in CSA Group and/or others to seek legal redress for such use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA Group reserves all intellectual property rights in this document.

Patent rights

Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA Group shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights is entirely their own responsibility.

Authorized use of this document

This document is being provided by CSA Group for informational and non-commercial use only. The user of this document is authorized to do only the following:

If this document is in electronic form:

• load this document onto a computer for the sole purpose of reviewing it;

• search and browse this document; and

• print this document if it is in PDF format.

  Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA Group to have such copies, and only if this Legal Notice appears on each such copy.

  In addition, users may not and may not permit others to

• alter this document in any way or remove this Legal Notice from the attached standard;

• sell this document without authorization from CSA Group; or

• make an electronic copy of this document.

  If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document or make any copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.

  
  

  
  

  Standards Update Service

  CSA C22.2 No. 62990-1:20

  November 2020

  
  

  Title: Workplace atmospheres — Part 1: Gas detectors — Performance requirements of detectors for toxic gases

  To register for e-mail notification about any updates to this publication

• go to store.csagroup.org

• click on Product Updates

The List ID that you will need to register for updates to this publication is 2428870.

If you require assistance, please e-mail techsupport@csagroup.org or call 416-747-2233.

Visit CSA Group’s policy on privacy at www.csagroup.org/legal to find out how we protect your personal information.

Canadian Standards Association (operating as “CSA Group”), under whose auspices this National Standard has been produced, was chartered in 1919 and accredited by the Standards Council of Canada to the National Standards system in 1973. It is a not-for- profit, nonstatutory, voluntary membership association engaged in standards development and certification activities.

CSA Group standards reflect a national consensus of producers and users — including manufacturers, consumers, retailers, unions and professional organizations, and governmental agencies. The standards are used widely by industry and commerce and often adopted by municipal, provincial, and federal governments in their regulations, particularly in the fields of health, safety, building and construction, and the environment.

Individuals, companies, and associations across Canada indicate their support for CSA Group’s standards development by

volunteering their time and skills to Committee work and supporting CSA Group’s objectives through sustaining memberships. The more than 7000 committee volunteers and the 2000 sustaining memberships together form CSA Group’s total membership from which its Directors are chosen. Sustaining memberships represent a major source of income for CSA Group’s standards development activities.

CSA Group offers certification and testing services in support of and as an extension to its standards development activities. To ensure the integrity of its certification process, CSA Group regularly and continually audits and inspects products that bear the

CSA Group Mark.

In addition to its head office and laboratory complex in Toronto, CSA Group has regional branch offices in major centres across Canada and inspection and testing agencies in eight countries. Since 1919, CSA Group has developed the necessary expertise to meet its corporate mission: CSA Group is an independent service

organization whose mission is to provide an open and effective forum for activities facilitating the exchange of goods and services through the use of standards, certification and related services to meet national and international needs.

For further information on CSA Group services, write to CSA Group

178 Rexdale Boulevard Toronto, Ontario, M9W 1R3 Canada

A National Standard of Canada is a standard developed by a Standards Council of Canada (SCC) accredited Standards Development Organization, in compliance with requirements and guidance set out by SCC. More information on National Standards of Canada can be found at www.scc.ca.

SCC is a Crown corporation within the portfolio of Innovation, Science and Economic Development (ISED) Canada. With the goal of enhancing Canada's economic competitiveness and social well- being, SCC leads and facilitates the development and use of national and international standards. SCC also coordinates Canadian participation in standards development, and identifies strategies to advance Canadian standardization efforts.

Accreditation services are provided by SCC to various customers, including product certifiers, testing laboratories, and standards development organizations. A list of SCC programs and accredited bodies is publicly available at www.scc.ca.

Standards Council of Canada 600-55 Metcalfe Street Ottawa, Ontario, K1P 6L5 Canada

Cette Norme Nationale du Canada est disponible en versions française et anglaise.

Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users to judge its suitability for their particular purpose.

®A trademark of the Canadian Standards Association, operating as “CSA Group”

National Standard of Canada

CSA C22.2 No. 62990-1:20

Workplace atmospheres — Part 1: Gas detectors — Performance requirements of detectors for toxic gases

(IEC 62990-1:2019, MOD)

Prepared by

International Electrotechnical Commission

Reviewed by

®A trademark of the Canadian Standards Association, operating as “CSA Group”

Published in November 2020 by CSA Group A not-for-profit private sector organization

178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3

To purchase standards and related publications, visit our Online Store at store.csagroup.org

or call toll-free 1-800-463-6727 or 416-747-4044.

ICS 29.260.20

ISBN 978-1-4883-3483-2

© 2020 Canadian Standards Association

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

CSA C22.2 No. 62990-1:20

Workplace atmospheres — Part 1: Gas detectors — Performance

requirements of detectors for toxic gases

CSA C22.2 No. 62990-1:20

Workplace atmospheres — Part 1: Gas detectors — Performance requirements of detectors for toxic gases

(IEC 62990-1:2019, MOD)

CSA Preface

This is the first edition of CSA C22.2 No. 62990-1, Workplace atmospheres — Part 1: Gas detectors — Performance requirements of detectors for toxic gases, which is an adoption, with Canadian deviations, of the identically titled IEC (International Electrotechnical Commission) Standard 62990-1 (first edition, 2019-06). It is one in a series of Standards issued by CSA Group under Part II of the Canadian Electrical Code.

For brevity, this Standard will be referred to as “CSA C22.2 No. 62990-1” throughout.

This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.

This Standard was reviewed for Canadian adoption by the CSA Integrated Committee on Hazardous Location Products, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee.

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

Interpretations: The Strategic Steering Committee on Requirements for Electrical Safety has provided the following direction for the interpretation of standards under its jurisdiction: “The literal text shall be used in judging compliance of products with the safety requirements of this Standard. When the literal text cannot be applied to the product, such as for new materials or construction, and when a relevant CSA committee interpretation has not already been published, CSA Group’s procedures for interpretation shall be followed to determine the intended safety principle.”

© 2020 Canadian Standards Association

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. IEC material is reprinted with permission. Where the words “this International Standard” appear in the text, they should be interpreted as “this National Standard of Canada”.

November 2020 © 2020 Canadian Standards Association CSA/8

CSA C22.2 No. 62990-1:20

Workplace atmospheres — Part 1: Gas detectors — Performance

requirements of detectors for toxic gases

Inquiries regarding this National Standard of Canada should be addressed to CSA Group

178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3 1-800-463-6727 • 416-747-4000

www.csagroup.org

To purchase standards and related publications, visit our Online Store at store.csagroup.org or call toll- free 1-800-463-6727 or 416-747-4044.

This Standard is subject to review within five years from the date of publication, and suggestions for its improvement will be referred to the appropriate committee. The technical content of IEC and ISO publications is kept under constant review by IEC and ISO. To submit a proposal for change, please send the following information to inquiries@csagroup.org and include “Proposal for change” in the subject line:

1. Standard designation (number);

2. relevant clause, table, and/or figure number;

3. wording of the proposed change; and

4. rationale for the change.

November 2020 © 2020 Canadian Standards Association CSA/9

– 2 – IEC 62990-1:2019 © IEC 2019

CONTENTS

FOREWORD 4

INTRODUCTION 6

1. Scope 7

2. Normative references 8

3. Terms and definitions 8

4. General requirements 16

   1. Overview 16

   2. Design 17

      1. General 17

      2. Indicating devices 17

      3. Alarm signal 19

      4. Fault signals 19

      5. Adjustments 20

      6. Battery-powered equipment 20

      7. Gas detection transmitter for use with separate gas detection control

         units 20

      8. Separate gas detection control units for use with gas detection

         transmitter(s) 21

      9. Software-controlled equipment 21

   3. Labelling and marking 22

   4. Instruction manual 23

5. Test methods 25

   1. General 25

   2. General requirements for tests 26

      1. Samples and sequence of tests 26

      2. Preparation of equipment before each test 27

      3. Mask for calibration and test 28

   3. Normal conditions for test 28

      1. General 28

      2. Test gas(es) 28

      3. Flow rate for test gases 28

      4. Power supply 29

      5. Temperature 29

      6. Pressure 29

      7. Humidity 29

      8. Acclimation time 29

      9. Orientation 29

      10. Communications options 29

      11. Gas detection equipment as part of systems 30

   4. Tests 30

      1. General 30

      2. Unpowered storage 30

      3. Measurement of deviations 31

      4. Mechanical tests 31

      5. Environmental tests 33

      6. Performance tests 36

      7. Electrical tests 41

         CSA C22.2 No. 62990-1:20

         IEC 62990-1:2019 © IEC 2019 – 3 –

      8. Stability 44

      9. Fault signal tests 45

      10. Software controlled equipment 46

      11. Protection against water 46

6. Uncertainty of measurement and lower limit of measurement for type HM

   equipment 47

   1. General 47

   2. Method of calculation of uncertainty of measurement 47

      1. Basic concept 47

      2. Sources of uncertainty 48

      3. Calculation of relative expanded uncertainty 53

   3. Method of calculation of lower limit of measurement 54

   4. Acceptance criteria 55

      1. Uncertainty of measurement 55

      2. Lower limit of measurement 55

   5. Relation between uncertainty and accuracy 55

Annex A (normative) Gas specific performance requirements 56

Annex B (informative) Determination of time of response and time of recovery 57

1. Aspirated equipment 57

   1. Test rig 57

   2. Equipment without internal pump 57

   3. Equipment with internal pump 57

2. Equipment that samples by diffusion 58

   1. Calibration mask method 58

   2. Diffusion or flow methods 58

Bibliography 60

Figure 1 – Relationship between indication range and measuring range 14

Figure 2 – Warm-up time in clean air (typical) 15

Figure 3 – Warm-up time in standard test gas (typical) 15

Figure 4 – Example of zero uncertainty 16

Figure B.1 – Schematic example of test rig for use with aspirated equipment 58

Figure B.2 – Schematic example of test chamber for diffusion method 59

Figure B.3 – Schematic example of test chamber for flow method 59

Table 1 – Factors to be considered in the expanded uncertainty estimate 48

Table A.1 – Gas specific performance requirements 56

CSA C22.2 No. 62990-1:20

IEC 62990-1:2019 © IEC 2019 – 7 –

WORKPLACE ATMOSPHERES –

Part 1: Gas detectors –

Performance requirements of detectors for toxic gases

1 Scope

This part of IEC 62990 specifies general requirements for design, function and performance, and describes the test methods that apply to portable, transportable, and fixed equipment for the detection and concentration measurement of toxic gases and vapours in workplace atmospheres and other industrial and commercial applications.

This document is applicable to continuously sensing equipment whose primary purpose is to provide an indication, alarm and/or other output function the purpose of which is to indicate the presence of a toxic gas or vapour in the atmosphere and in some cases to initiate automatic or manual protective action(s). It is applicable to equipment in which the sensor generates an electrical signal when gas is present.

This document applies to two types of equipment:

• Type HM (Health Monitoring) ‘occupational exposure’ equipment:

  For occupational exposure measurement, the performance requirements are focused on uncertainty of measurement of gas concentrations in the region of Occupational Exposure Limit Values (OELV). The upper limit of measurement will be defined by the manufacturer in accordance with 4.2.1.

• Type SM (Safety Monitoring) ‘general gas detection’ equipment:

For general gas detection applications (e.g. safety warning, leak detection), the performance requirements are focused on alarm signalling. The upper limit of measurement will be defined by the manufacturer according to the intended use of the equipment.

In general, the requirements for accuracy will be higher for Type HM equipment than for Type SM equipment. The same equipment may meet the requirements of both Type HM and Type SM.

For equipment used for sensing the presence of multiple gases this document applies only to the detection of toxic gas or vapour.

This document is not applicable to equipment:

• with samplers and concentrators such as sorbents or paper tape having an irreversible indication;

• used for the measurement of gases and vapours related to the risk of explosion;

• used for the measurement of oxygen;

• used only in laboratories for analysis or measurement;

• used only for process measurement purposes;

• used in the domestic environment;

• used in environmental air pollution monitoring;

• used for open-path (line of sight) area gas measurement;

• used for ventilation control in car parks or tunnels.

CSA C22.2 No. 62990-1:20