DIN EN ISO 7933:2024-03
Ergonomics of the thermal environment - Analytical determination and interpretation of heat stress using calculation of the predicted heat strain (ISO 7933:2023); German version EN ISO 7933:2023
| Fecha edición: |
2024-03-01
En Vigor
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| Idiomas disponibles: | Inglés, Alemán |
| Resumen: | 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. |
| Keywords: | Analysis|Climate|Effect of heating|Ergonomics|Evaluations|Exposure|Fundamental quantity|Heat|Heat balance|Heat load|Heat stress|Human body|Liquids|Losses|Mathematical calculations|Measuring techniques|Methods|Models|Moisture|Occupational safety|Operating stations|Organization|Sequence of operations|Sweat|Sweat rate|Thermal comfort|Thermal environment|Thermal stress|Thermics|Working places|Working procedures|Works|Zones of reach |
| ICS: | 13.180 - Ergonomía |
| CTN: | |
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Equivalencia Internacional |
Idéntica EN ISO 7933:2023 Idéntica ISO 7933:2023 |
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Reemplazo Normas |
Reemplaza a DIN EN ISO 7933:2004-12 Reemplaza a DIN EN ISO 7933:2021-12 |
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