1、Ergonomics of the thermal environment - Assessment of heat stress using the WBGT (wet bulb globe temperature) index (ISO 7243:2017)BS EN ISO 7243:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7243 Septemb
2、er 2017 ICS 13.180 Supersedes EN 27243:1993English 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 thermique de lhomme au travail, base sur lindice WBGT (tempra
3、ture humide et de globe noir) (ISO 7243:2017) Ergonomie der thermischen Umgebung - Ermittlung der Wrmebelastung durch den WBGT-Index (wet bulb globe temperature) (ISO 7243:2017) This European Standard was approved by CEN on 1 July 2017. CEN members are bound to comply with the CEN/CENELEC Internal R
4、egulations 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 m
5、ember. 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
6、. 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, Pola
7、nd, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of explo
8、itation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7243:2017 ENational forewordThis British Standard is the UK implementation of EN ISO 7243:2017. It is identical to ISO 7243:2017. It supersedes BS EN 27243:1994, which is withdrawn.The UK participation
9、in its preparation was entrusted to Technical Committee PH/9/-/1, Ergonomics of the physical environment.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users ar
10、e responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 87703 2ICS 13.180Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Sta
11、ndards Policy and Strategy Committee on 31 October 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 7243:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7243 September 2017 ICS 13.180 Supersedes EN 27243:1993English Version Ergonomics of the
12、 thermal environment - Assessment of heat stress using the WBGT (wet bulb globe temperature) index (ISO 7243:2017) Ambiances chaudes - Estimation de la contrainte thermique de lhomme au travail, base sur lindice WBGT (temprature humide et de globe noir) (ISO 7243:2017) Ergonomie der thermischen Umge
13、bung - Ermittlung der Wrmebelastung durch den WBGT-Index (wet bulb globe temperature) (ISO 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
14、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, Fr
15、ench, 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, Bulgari
16、a, 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, Switzerlan
17、d, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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 worldwide for CEN national Mem
18、bers. Ref. No. EN ISO 7243:2017 EBS EN ISO 7243:2017EN ISO 7243:2017 (E) 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. Th
19、is 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
20、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 a
21、re 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, P
22、ortugal, 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. ISO 7243:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 T
23、erms and definitions . 14 Method 25 Determination of WBGT 36 Determination of metabolic rate . 37 Determination of effects of clothing . 38 Timing and duration of measurements 48.1 Timing of measurements . 48.2 Duration of measurements . 49 Spatial and temporal variations . 59.1 Measurement specific
24、ations relating to heterogeneity of environment (spatial variations) 59.2 Measurement specifications relating to time variations of WBGT index . 59.3 Measurement specifications relating to time variations of metabolic rate 59.4 Measurement specifications relating to time variations of clothing 510 I
25、nterpretation 6Annex A (informative) Reference values of the WBGT heat stress index . 7Annex B (normative) Measurement of parameters used in the WBGT index and specification of instruments. 9Annex C (informative) Alternative globe thermometers 11Annex D (informative) Prediction of natural wet bulb t
26、emperature .13Annex E (informative) Estimation of metabolic rate 15Annex F (informative) Clothing adjustment values (CAVs) 16Bibliography .17 ISO 2017 All rights reserved iiiContents PageBS EN ISO 7243:2017ISO 7243:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and defini
27、tions . 14 Method 25 Determination of WBGT 36 Determination of metabolic rate . 37 Determination of effects of clothing . 38 Timing and duration of measurements 48.1 Timing of measurements . 48.2 Duration of measurements . 49 Spatial and temporal variations . 59.1 Measurement specifications relating
28、 to heterogeneity of environment (spatial variations) 59.2 Measurement specifications relating to time variations of WBGT index . 59.3 Measurement specifications relating to time variations of metabolic rate 59.4 Measurement specifications relating to time variations of clothing 510 Interpretation 6
29、Annex A (informative) Reference values of the WBGT heat stress index . 7Annex B (normative) Measurement of parameters used in the WBGT index and specification of instruments. 9Annex C (informative) Alternative globe thermometers 11Annex D (informative) Prediction of natural wet bulb temperature .13A
30、nnex E (informative) Estimation of metabolic rate 15Annex F (informative) Clothing adjustment values (CAVs) 16Bibliography .17 ISO 2017 All rights reserved iiiContents PageBS EN ISO 7243:2017ISO 7243:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of
31、 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. Int
32、ernational 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 in
33、tended 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 w
34、ww.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
35、 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 mea
36、ning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs 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 Techni
37、cal 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 a
38、re 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
39、ISO 2017 All rights reservedBS EN ISO 7243:2017ISO 7243:2017(E)ForewordISO (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 comm
40、ittees. 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
41、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
42、 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
43、 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 docume
44、nt 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 ISOs adherence to the World Trade Orga
45、nization (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 seco
46、nd 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 potenti
47、al 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)IntroductionThis International Standard provides a method for the assessment of heat stress. It is
48、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 stres
49、s 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
