標準號：SAE ARP 4285-2001
中文標準名稱：宇航液壓系統液體中微粒污染物的膜評估程序
英文標準名稱：Aerospace - Evaluation of Particulate Contamination in Hydraulic Fluid - Membrane Procedure
標準類型：V38
發布日期：2001/3/1 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：V38
國際標準分類號：49.080
引用標準：SAE ARP 598;SAE ARP 5376;SAE AS 4059;SAE AS 1241;SAE AS 8775;MIL-F-8815;MIL-H-5606;MIL-PRF-680;MIL-PRF-6083;MIL-PRF-83282;MIL-PRF-87257;FED-STD-209;ISO 11500
適用范圍：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.