This document specifies a bench test method for the measurement of the emission rate of a specified airborne hazardous substance from machines using a test bench under specified operating conditions of the machine. The measurement of the emission rates of a specified 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.