1.1 本试验方法可用于测定家用和商用炭罐（罐式）、棍棒式、手持式、立式和公用真空吸尘器系统的初始、分数和过滤效率。 1.1.1 本试验方法不包括不使用位于水基过滤器和清洁排气之间的可更换干介质过滤器的水过滤真空吸尘器。已确定这些真空吸尘器的排气与指定的离散粒子计数器（DPC）程序不兼容。 1.2 整个真空吸尘器系统在六个离散粒径（0.3、0.5、0.7、1.0、2.0和>3μm）下的初始、分数过滤效率是通过计算上游挑战颗粒和下游颗粒的成分得出的，而真空吸尘器系统是在静止的测试条件下运行的。 1.3 在地板喷嘴、软管末端（手柄）或真空吸尘器入口（手持式产品）以正常气流速度测试真空吸尘器系统。 1.4 真空吸尘器系统在安装新过滤器的情况下进行测试，并且没有初步的灰尘负载。通过本试验方法确定的分数效率应视为初始系统过滤效率。 1.5 中和氯化钾（KCl）用作本试验方法中的激发介质。 1.6 可以使用一个或两个粒子计数器来满足本试验方法的要求。如果使用一个计数器，则需要流量控制在上游和下游空气采样探头之间切换采样。 1.7 为了有效利用这种测试方法，建议使用自动测试设备和计算机数据采集。 1.8 对于设备和测试程序的特定应用，不同的采样参数、流速等可能会提供相同的结果。定义这些不同的可能性超出了本测试方法的范围。 1.9 本试验方法仅限于本文件所述的试验装置或其等效物。 1.10 本试验方法无意或旨在提供真空清洗对健康影响或医疗方面的任何测量。 1.11 本试验方法无意或设计用于确定核设施和国防设施中使用的真空吸尘器系统中使用的高效空气过滤器组件的完整性。 1.12 本试验方法中使用英寸-磅单位制，但通常使用微米（μm）来描述粒度，该粒度为国际单位制。 1.13 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.14 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 众所周知，现代电器，包括使用碳刷换向的电机，可能会向周围环境排放气溶胶颗粒。 本试验方法确定了真空吸尘器系统的初始、分数过滤效率，并将这些排放考虑在内。 5.2 对于所有测试的真空吸尘器系统，无论源是什么，装置的总排放量都将在测试程序中确定的六个粒度级别中的每一个级别进行计数。本试验方法确定了真空吸尘器系统的初始过滤效率，在计算效率时数学上去除或不去除电机排放。

1.1 This test method may be used to determine the initial, fractional, filtration efficiency of household and commercial canister (tank-type), stick, hand-held, upright, and utility vacuum cleaner systems. 1.1.1 Water-filtration vacuum cleaners which do not utilize a replaceable dry media filter located between the water-based filter and cleaning air exhaust are not included in this test method. It has been determined that the exhaust of these vacuum cleaners is not compatible with the specified discrete particle counter (DPC) procedure. 1.2 The initial, fractional, filtration efficiencies of the entire vacuum cleaner system, at six discrete particle sizes (0.3, 0.5, 0.7, 1.0, 2.0, and >3 μm), is derived by counting upstream challenge particles and the constituent of downstream particles while the vacuum cleaner system is being operated in a stationary test condition. 1.3 The vacuum cleaner system is tested either at the floor nozzle, the end of the hose (handle), or at the vacuum cleaner inlet (for handheld products) at the normal airflow rate. 1.4 The vacuum cleaner system is tested with a new filter(s) installed, and with no preliminary dust loading. The fractional efficiencies determined by this test method shall be considered initial system filtration efficiencies. 1.5 Neutralized potassium chloride (KCl) is used as the challenge media in this test method. 1.6 One or two particle counters may be used to satisfy the requirements of this test method. If using one counter, flow control is required to switch between sampling the upstream and downstream air sampling probes. 1.7 To efficiently utilize this test method, automated test equipment and computer data acquisition is recommended. 1.8 Different sampling parameters, flow rates, and so forth, for the specific applications of the equipment and test procedure may provide equivalent results. It is beyond the scope of this test method to define those various possibilities. 1.9 This test method is limited to the test apparatus, or its equivalent, as described in this document. 1.10 This test method is not intended or designed to provide any measure of the health effects or medical aspects of vacuum cleaning. 1.11 This test method is not intended or designed to determine the integrity of HEPA filtration assemblies used in vacuum cleaner systems employed in nuclear and defense facilities. 1.12 The inch-pound system of units is used in this test method, except for the common usage of the micrometer, μm, for the description of particle size which is a SI unit. 1.13 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.14 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 It is well known that modern electrical appliances, incorporating electric motors that use carbon brushes for commutation, may emit aerosolized, particles into the surrounding environment. This test method determines the initial, fractional, filtration efficiency of a vacuum cleaner system, taking those emissions into consideration. 5.2 For all vacuum cleaner systems tested, the total emissions of the unit, whatever the source(s), will be counted at each of the six particle size levels identified in the test procedure. This test method determines the initial, fractional filtration efficiency of a vacuum cleaner system, with or without the motor emissions mathematically removed in the calculation of efficiency.