IEC 62990-2:2021
(Main)Workplace atmospheres - Part 2: Gas detectors - Selection, installation, use and maintenance of detectors for toxic gases and vapours
Workplace atmospheres - Part 2: Gas detectors - Selection, installation, use and maintenance of detectors for toxic gases and vapours
IEC 62990-2:2021 gives guidance on the selection, installation, use and maintenance of electrical equipment used for the measurement of toxic gases and vapours in workplace atmospheres. The primary purpose of such equipment is to ensure safety of personnel and property by providing an indication of the concentration of a toxic gas or vapour and warning of its presence.
This document is applicable to equipment whose purpose is to provide an indication, alarm or other output function to give a warning of the presence of a toxic gas or vapour in the atmosphere and in some cases to initiate automatic or manual protective actions. It is applicable to equipment in which the sensor automatically generates an electrical signal when gas is present.
For the purposes of this document, equipment includes:
a) fixed equipment;
b) transportable equipment, and
c) portable equipment.
This document is intended to cover equipment defined within IEC 62990-1, but can provide useful information for equipment not covered by that document.
Atmosphères des lieux de travail - Partie 2: Détecteurs de gaz - Sélection, installation, utilisation et maintenance des détecteurs de gaz et de vapeurs toxiques
IEC 62990-2:2021 donne des recommandations pour la sélection, l’installation, l’utilisation et la maintenance du matériel électrique utilisé pour le mesurage des gaz et des vapeurs toxiques dans les atmosphères des lieux de travail. Le principal objectif de ce type de matériel est d’assurer la sécurité des personnes et des biens en fournissant une indication de la concentration d’un gaz ou d’une vapeur toxique et en avertissant de sa présence.
Le présent document s’applique aux matériels dont l’objectif principal est de donner une indication, une alarme ou une autre fonction de sortie pour avertir de la présence d’un gaz ou d’une vapeur toxique dans l’atmosphère et, dans certains cas, de déclencher des actions protectrices automatiques ou manuelles. Il s’applique aux matériels dont le capteur génère automatiquement un signal électrique en présence de gaz.
Pour les besoins du présent document, les matériels comprennent:
a) le matériel fixe;
b) le matériel transportable; et
c) le matériel portable.
Le présent document est destiné à couvrir les matériels définis dans l’IEC 62990-1, mais peut fournir des informations utiles pour des matériels non couverts par ce document.
General Information
Standards Content (Sample)
IEC 62990-2
Edition 1.0 2021-06
INTERNATIONAL
STANDARD
colour
inside
Workplace atmospheres –
Part 2: Gas detectors – Selection, installation, use and maintenance of detectors
for toxic gases and vapours
IEC 62990-2:2021-06(en)
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IEC 62990-2
Edition 1.0 2021-06
INTERNATIONAL
STANDARD
colour
inside
Workplace atmospheres –
Part 2: Gas detectors – Selection, installation, use and maintenance of detectors
for toxic gases and vapours
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.260.20 ISBN 978-2-8322-9746-9
Warning! Make sure that you obtained this publication from an authorized distributor.
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– 2 – IEC 62990-2:2021 © IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Properties and detection of toxic gases and vapours . 13
4.1 Properties and detection . 13
4.2 The difference between detecting gases and vapours . 14
4.3 Effects of water vapour on detection . 17
4.4 Effects of temperature and pressure on detection . 17
4.5 Effects of corrosion on detection . 17
4.6 Detection by oxygen deficiency measurement . 17
5 Measurement tasks . 18
5.1 General .
...
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