This European Standard specifies a room method for the measurement of the pollutant concentration parameter of a specified airborne hazardous substance from machines, located in a test room and operating the machines under defined conditions.This method can only be used for machines with a local exhaust ventilation with an air flow rate Â3S 500 m3/h and machines without recirculated air.Measurement of the pollutant concentration parameter of a machine can serve for the:a) evaluation of the performance of a machine;b) evaluation of the improvement of the machine;c) comparison of machines within groups of machines with the same intended use (groups are define