EN ISO 7243:2017
(Main)Ergonomics of the thermal environment - Assessment of heat stress using the WBGT (wet bulb globe temperature) index (ISO 7243:2017)
Ergonomics of the thermal environment - Assessment of heat stress using the WBGT (wet bulb globe temperature) index (ISO 7243:2017)
ISO 7243:2017 presents a screening method for evaluating the heat stress to which a person is exposed and for establishing the presence or absence of heat stress.
It applies to the evaluation of the effect of heat on a person during his or her total exposure over the working day (up to 8 h).
It does not apply for very short exposures to heat.
It applies to the assessment of indoor and outdoor occupational environments as well as to other types of environment, and to male and female adults who are fit for work.
Ergonomie der thermischen Umgebung - Ermittlung der Wärmebelastung durch den WBGT-Index (wet bulb globe temperature) (ISO 7243:2017)
Ambiances chaudes - Estimation de la contrainte thermique de l'homme au travail, basée sur l'indice WBGT (température humide et de globe noir) (ISO 7243:2017)
ISO 7243:2017 décrit une méthode d'examen préalable permettant d'évaluer la contrainte thermique à laquelle est exposée une personne et d'établir la présence ou l'absence de contrainte thermique.
ISO 7243:2017 s'applique à l'évaluation de l'effet de la chaleur sur une personne pendant son exposition totale au cours d'une journée de travail (jusqu'à 8 heures).
ISO 7243:2017 ne s'applique pas à de très courtes expositions à la chaleur.
ISO 7243:2017 s'applique à l'évaluation des environnements de travail intérieur et extérieur ainsi qu'à d'autres types d'environnement, et aux hommes et femmes adultes et aptes au travail.
Ergonomija toplotnega okolja - Ocenitev toplotnega stresa na podlagi kazalnika WBGT (ISO 7243:2017)
Ta dokument predstavlja presejalno metodo za ocenitev toplotnega stresa, ki mu je izpostavljena oseba, ter za ugotavljanje prisotnosti ali odsotnosti toplotnega stresa.
Uporablja se za ovrednotenje vpliva toplote na osebo med njeno skupno izpostavljenostjo v delovnem dnevu (do 8 ur).
Ne uporablja se za zelo kratke izpostavljenosti toploti.
Uporablja se za ocenitev poklicnega okolja v zaprtih prostorih in na prostem ter druge vrste
okolij in za odrasle moške ter ženske, ki so sposobni za delo.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2018
1DGRPHãþD
SIST EN 27243:2001
Ergonomija toplotnega okolja - Ocenitev toplotnega stresa na podlagi kazalnika
WBGT (ISO 7243:2017)
Ergonomics of the thermal environment - Assessment of heat stress using the WBGT
(wet bulb globe temperature) index (ISO 7243:2017)
Ergonomie der thermischen Umgebung - Ermittlung der Wärmebelastung durch den
WBGT-Index (wet bulb globe temperature) (ISO 7243:2017)
Ambiances chaudes - Estimation de la contrainte thermique de l’homme au travail,
basée sur l’indice WBGT (température humide et de globe noir) (ISO 7243:2017)
Ta slovenski standard je istoveten z: EN ISO 7243:2017
ICS:
13.180 Ergonomija Ergonomics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 7243
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2017
EUROPÄISCHE NORM
ICS 13.180 Supersedes EN 27243:1993
English Version
Ergonomics of the thermal environment - Assessment of
heat stress using the WBGT (wet bulb globe temperature)
index (ISO 7243:2017)
Ambiances chaudes - Estimation de la contrainte Ergonomie der thermischen Umgebung - Ermittlung
thermique de l'homme au travail, basée sur l'indice der Wärmebelastung durch den WBGT-Index (wet bulb
WBGT (température humide et de globe noir) (ISO globe temperature) (ISO 7243:2017)
7243:2017)
This European Standard was approved by CEN on 1 July 2017.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7243:2017 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 7243:2017) has been prepared by Technical Committee ISO/TC 159
“Ergonomics” in collaboration with Technical Committee CEN/TC 122 “Ergonomics” the secretariat of
which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by March 2018, and conflicting national standards shall
be withdrawn at the latest by March 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 27243:1993.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 7243:2017 has been approved by CEN as EN ISO 7243:2017 without any modification.
INTERNATIONAL ISO
STANDARD 7243
Third edition
2017-08
Ergonomics of the thermal
environment — Assessment of heat
stress using the WBGT (wet bulb globe
temperature) index
Ambiances chaudes — Estimation de la contrainte thermique de
l'homme au travail, basée sur l'indice WBGT (température humide et
de globe noir)
Reference number
ISO 7243:2017(E)
©
ISO 2017
ISO 7243:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
ISO 7243:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Method . 2
5 Determination of WBGT . 3
6 Determination of metabolic rate . 3
7 Determination of effects of clothing . 3
8 Timing and duration of measurements . 4
8.1 Timing of measurements . 4
8.2 Duration of measurements . 4
9 Spatial and temporal variations . 5
9.1 Measurement specifications relating to heterogeneity of environment
(spatial variations) . 5
9.2 Measurement specifications relating to time variations of WBGT index . 5
9.3 Measurement specifications relating to time variations of metabolic rate . 5
9.4 Measurement specifications relating to time variations of clothing . 5
10 Interpretation . 6
Annex A (informative) Reference values of the WBGT heat stress index . 7
Annex B (normative) Measurement of parameters used in the WBGT index and
specification of instruments. 9
Annex C (informative) Alternative globe thermometers .11
Annex D (informative) Prediction of natural wet bulb temperature .13
Annex E (informative) Estimation of metabolic rate .15
Annex F (informative) Clothing adjustment values (CAVs) .16
Bibliography .17
ISO 7243:2017(E)
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 159, Ergonomics, Subcommittee SC 5,
Ergonomics of the physical environment.
This third edition cancels and replaces the second edition (ISO 7243:1989), which has been technically
revised and contains the following changes:
— in Annex A, for information, additional exposure limits are represented in Figure A.1, together with
reference equations;
— the assessment of heat stress now includes the effects of clothing;
— the potential errors and adjustments for non-standard globe temperature sensors are described;
— a method for predicting the natural wet bulb temperature is provided.
iv © ISO 2017 – All rights reserved
ISO 7243:2017(E)
Introduction
This International Standard provides a method for the assessment of heat stress. It is one of a series of
standards intended for use in the assessment of thermal environments. These include standards for the
assessment of hot, moderate and cold environments involving both the principles of assessment and
their practical application.
The wet bulb globe temperature (WBGT) is a heat stress index and its value represents the thermal
environment to which an individual is exposed. This index is easy to determine in most environments.
It should be regarded as a screening method to establish the presence or absence of heat stress.
A method of estimating the thermal stress, based on an analysis of the heat exchange between a person
and the environment, allows a more accurate estimation of stress and an analysis of the methods of
protection (see ISO 7933). Such a method should be used either directly when it is desired to carry
out an intensive analysis of working conditions in heat, or in addition to the method presented in this
standard, which is based upon the WBGT i
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.