SS-EN-ISO-7933 Ergonomics of the thermal environment - Analytical determination and interpretation of heat stress using calculation of the predicted heat strain (ISO 7933:2004)

SS-EN-ISO-7933 - 2004 EDITION - CURRENT


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This International Standard specifies a method for the analytical evaluation and interpretation of the thermal stress experienced by a subject in a hot environment. It describes a method for predicting the sweat rate and the internal core temperature that the human body will develop in response to the working conditions. 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 subject. In this way, this International Standard makes it possible to determine which parameter or group of parameters should be modified, and to what extent, in order to reduce the risk of physiological strains. The main objectives of this International Standard are the following: a) the evaluation of the thermal stress in conditions likely to lead to excessive core temperature increase or water loss for the standard subject; b) the determination of exposure times with which the physiological strain is acceptable (no physical damage is to be expected). In the context of this prediction mode, these exposure times are called “maximum allowable exposure times”. This International Standard does not predict the physiological response of individual subjects, but only considers standard subjects in good health and fit for the work they perform. It is therefore intended to be used by ergonomists, industrial hygienists, etc., to evaluate working conditions.

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13.180 (Ergonomics)

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Designation Name

SS-EN ISO 7933:2004

Revision Level

2004 EDITION

Status

Current

Publication Date

Nov. 5, 2004

Language(s)

English

Page Count

39

International Equivalent

EN ISO 7933:200(IDT); ISO 7933:2004(IDT)