ISO 16890-4:2016建立了一种调节方法来确定最小分数测试效率。 它旨在与ISO 16890-1，ISO 16890-2和ISO 16890 3结合使用，并提供了测试设备和调节柜的相关测试要求以及随后的调节程序。 ISO 16890本部分描述的调理方法是指标称面积为610毫米×610毫米（24英寸×24英寸）的测试装置。 ISO 16890（所有部分）是指根据ISO 16890（所有部分）中规定的程序进行测试时，通用通风的微粒空气过滤器元件，其具有小于或等于99％的ePM1效率和大于20％的ePM10效率。 注意此测试程序的下限设置为最低ePM10效率为20％，因为低于此级别的测试过滤器元件将非常难以满足此程序的统计有效性要求。 通过其他适用的测试方法评估该气溶胶组分之外的空气过滤元件。参见ISO 29463（所有部分）。 便携式空气净化器中使用的过滤元件不在ISO 16890本部分的范围之内。 根据ISO 16890（所有部分）获得的性能结果本身不能

ISO 16890-4:2016 establishes a conditioning method to determine the minimum fractional test efficiency. It is intended for use in conjunction with ISO 16890‑1, ISO 16890‑2 and ISO 16890‑3, and provides the related test requirements for the test device and conditioning cabinet as well as the conditioning procedure to follow. The conditioning method described in this part of ISO 16890 is referring to a test device with a nominal face area of 610 mm × 610 mm (24 inch × 24 inch). ISO 16890 (all parts) refers to particulate air filter elements for general ventilation having an ePM1 efficiency less than or equal to 99 % and an ePM10 efficiency greater than 20 % when tested according to the procedures defined within ISO 16890 (all parts). NOTE The lower limit for this test procedure is set at a minimum ePM10 efficiency of 20 % since it will be very difficult for a test filter element below this level to meet the statistical validity requirements of this procedure. Air filter elements outside of this aerosol fraction are evaluated by other applicable test methods. See ISO 29463 (all parts). Filter elements used in portable room-air cleaners are excluded from the scope of this part of ISO 16890. The performance results obtained in accordance with ISO 16890 (all parts) cannot by themselves be quantitatively applied to predict performance in service with regard to efficiency and lifetime. The results from this part of ISO 16890 may also be used by other standards that define or classify the fractional efficiency in the size range of 0,3 μm to 10 μm when electrostatic removal mechanism is an important factor to consider, for example ISO 29461.