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  • BSI
    BS EN ISO 7933:2023 Ergonomics of the thermal environment. Analytical determination and interpretation of heat stress using calculation of the predicted heat strain
    Edition: 2023
    $442.60
    / user per year

Description of BS EN ISO 7933:2023 2023

This document describes a model [the predicted heat strain (PHS) model] for the analytical determination and interpretation of the thermal stress (in terms of water loss and rectal temperature) experienced by an average person in a hot environment and determines the maximum allowable exposure times within which the physiological strain is acceptable for 95 % of the exposed population (the maximum tolerable rectal temperature and the maximum tolerable water loss are not exceeded by 95 % of the exposed people). The various terms used in this prediction model and, in particular, in the heat balance, show the influence of the different physical parameters of the environment on the thermal stress experienced by the average person. In this way, this document makes it possible to determine which parameter or group of parameters can be changed, and to what extent, in order to reduce the risk of excessive physiological strain. In its present form, this method of assessment is not applicable to cases where special protective clothing (e.g. fully reflective clothing, active cooling and ventilation, impermeable coveralls) is worn. This document does not predict the physiological response of an individual person, but only considers average persons in good health and fit for the work they perform. It is therefore intended to be used by, among others, ergonomists and industrial hygienists, as the outcomes can require expert interpretations. Recommendations about how and when to use this model are given in ISO 8025.

Standard NumberBS EN ISO 7933:2023
TitleErgonomics of the thermal environment. Analytical determination and interpretation of heat stress using calculation of the predicted heat strain
StatusDefinitive
Publication Date2023-08-07
ReplacesBS EN ISO 7933:2004
Identical National Standard OfEN ISO 7933, ISO 7933
DescriptorsSweat, Acclimatization, Working conditions (physical), Human body, Thermal stress, Heat, Mathematical calculations, Evaporation, Ergonomics, Environment (working), Climate, Formulae (mathematics)
ICS13.180 Ergonomics
CommitteePH/9/-/1
ISBN978 0 539 17524 0
PublisherBSI
Pages38

The following editions for this book are also available...

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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