This European Standard specifies a test bench method for the measurement of the emission rate of a given airborne hazardous substance from machines using a test bench under specified operating conditions of the machine. The measurement of the emission rates of a given pollutant emitted from machines can serve for: a) the evaluation of the performance of a machine; b) the evaluation of the reduction of pollutant emissions of the machine; c) the comparison of machines within groups of machines with the same intended use (groups are defined by the function and materials processed); d) the ranking of machines from the same group according to their emission rates; e) the determination of the state of the art of machines with respect to their emission rates. This European Standard is not applicable to machinery which is manufactured before the date of its publication as an EN.