本文件建立了一种调节方法，以确定最小分数测试效率。 它旨在与ISO 16890-1、ISO 168902和ISO 16890m3一起使用，并提供测试设备和调节柜的相关测试要求以及要遵循的调节程序。 本文件中描述的调节方法是指标称表面面积为610 mm×610 mm（24英寸×24英寸）的试验装置。 本文件是指当根据ISO 16890系列中规定的程序进行测试时，ePM1效率小于或等于99%，ePM10效率大于20%的一般通风用颗粒空气滤清器滤芯。 注:该测试程序的下限设置为最低ePM10效率20%，因为低于该水平的测试滤芯很难满足该程序的统计有效性要求。 便携式房间空气滤清器中使用的滤芯不在本文件范围内。

This document establishes a conditioning method to determine the minimum fractional test efficiency. It is intended to be used 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 document is referring to a test device with a nominal face area of 610 mm × 610 mm (24 inches × 24 inches). This document 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 the ISO 16890 series. 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. Filter elements used in portable room-air cleaners are excluded from the scope of this document.