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ISO 7933

Ergonomics of the thermal environment Analytical determination and interpretation of heat stress using calculation of the predicted heat strain

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Organization: ISO
Publication Date: 15 August 2004
Status: active
Page Count: 43
ICS Code (Ergonomics): 13.180
scope:

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.

Document History

November 12, 2021
Ergonomics of the thermal environment — Analytical determination and interpretation of heat stress using calculation of the predicted heat strain
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)...
ISO 7933
August 15, 2004
Ergonomics of the thermal environment Analytical determination and interpretation of heat stress using calculation of the predicted heat strain
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...
July 15, 1989
Hot Environments - Analytical Determination and Interpretation of Thermal Stress Using Calculation of Required Sweat Rate
A description is not available for this item.

References

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