EN ISO 7243:2017

European foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Method
5 Determination of WBGT
6 Determination of metabolic rate
7 Determination of effects of clothing
8 Timing and duration of measurements
9 Spatial and temporal variations
10 Interpretation
Annex A (informative) - Reference values
        of the WBGT heat stress index
Annex B (normative) - Measurement of
        parameters used in the WBGT
        index and specification of instruments
Annex C (informative) - Alternative globe
        thermometers
Annex D (informative) - Prediction of natural
        wet bulb temperature
Annex E (informative) - Estimation of metabolic
        rate
Annex F (informative) - Clothing adjustment
        values (CAVs)
Bibliography

ISO 7243:2017 presents a screening method for evaluating the heat stress to which a person is exposed and for establishing the presence or absence of heat stress.It applies to the evaluation of the effect of heat on a person during his or her total exposure over the working day (up to 8 h).It does not apply for very short exposures to heat.It applies to the assessment of indoor and outdoor occupational environments as well as to other types of environment, and to male and female adults who are fit for work.