ISO 29042-8:20 11规定了一种室内方法，用于测量位于测试室内并在规定条件下操作机器的机器中给定空气传播有害物质的污染物浓度参数。本方法仅适用于空气流量≥500m3/h的局部排风通风的机器和无再循环空气的机器。 机器的污染物浓度参数的测量可以用于:a)评估机器的性能；b)评估机器的改进；c)具有相同预期用途的不同机器组内的机器的比较（此类组由功能和加工的材料定义）；d)根据其污染物浓度参数对来自同一组的机器进行排序；e)确定机器关于其污染物浓度参数的现有技术水平。

ISO 29042-8:2011 specifies a room method for the measurement of the pollutant concentration parameter of a given airborne hazardous substance from machines, located in a test room and operating the machines under defined conditions. This method is applicable only to machines with a local exhaust ventilation with an air flow rate ≥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 different groups of machines with the same intended use (such groups being defined by the function and materials processed); d) ranking of machines from the same group according to their pollutant concentration parameters; e) determination of the state of the art of a machine with respect to its pollutant concentration parameter.