This SAE Aerospace Recommended Practice (ARP) establishes a method for evaluating the particulate matter extracted from the working fluid of a hydraulic system or component using a membrane. The amount of particulate matter deposited on the membrane due to filtering a given quantity of fluid is visually compared against a standard membrane in order to provide an indication of the cleanliness level of the fluid. A particular feature of this method is the membrane preparation to achieve an even particulate distribution on the membrane suitable for other applications. Membrane evaluation using standard membranes, described in this document, is an alternative technique to counting with either an optical microscope (ARP598) or an automatic particule counter (ISO 11500). The latter particle counting procedures are considered more precise. This procedure shall not be used as an alternative to particle counting unless agreed to by the customer since the results by this procedure may differ from those by particle counting, even though the standard membrane correlates to a specific particle count.
SAE ARP 4285-2001由美国机动车工程师协会 US-SAE 发布于 2001-03-01。
SAE ARP 4285-2001 在中国标准分类中归属于: V38 液压、冷气系统及其附件,在国际标准分类中归属于: 49.080 航空航天用流体系统和零部件。
* 在 SAE ARP 4285-2001 发布之后有更新,请注意新发布标准的变化。
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