標準號：BS 8465-2010
中文標準名稱：液壓傳動.顆粒污染級別的監控.比較膜技術
英文標準名稱：Hydraulic fluid power. Monitoring the level of particulate contamination. Comparison membrane technique
標準類型：E39
發布日期：2010/10/31 12:00:00
實施日期：2010/10/31 12:00:00
中國標準分類號：E39
國際標準分類號：75.120
適用范圍：This British Standard specifies methods to assess the level ofparticulate contamination in hydraulic liquids using an opticalmicroscope. It includes assessment by two manual methods usingeither transmitted- or incident-lighting systems. It also includesprocedures for evaluating and controlling the accuracy of thetechnique that ensure reproducible results.This method is applicable to nearly all hydraulic liquids at a wide rangeof contamination levels, provided the samples can be filtered. However,the procedure requires modification for samples that are either heavilycontaminated (e.g. > ISO -/20/17 according to BS ISO 4406) or lightlycontaminated (< ISO -/12/10 according to BS ISO 4406), by decreasing orincreasing the volume of sample filtered.This procedure is not applicable to samples that have high concentrationsof small (< 3 μm) particles (so called “silt”), gels or where overlappingparticles are present on the membrane filter.The method detailed is a qualitative assessment only, not a quantitativeevaluation, and it is applicable to all samples where the data has to beexpressed in terms of contaminant codes.