This International Standard specifies the minimum charac-teristics of appliances for measuring physical quantities charac-terizing an environment as well as the methods for measuring the physical quantities of this environment.
It does not aim to define an overall index of comfort or thermal stress but simply to standardize the process of recording infor-mation leading to the determination of this index. Other Inter-national Standards give details of the methods making use of the information obtained in accordance with this document.
This International Standard shall be used as a reference when establishing
a) specifications for manufacturers and users of in-struments for measuring the physical quantities of the environment;
b) a written contract between two parties for the measure-ment of these quantities.
It applies to the study of hot, comfortable or cold environments in any place occupied by man.