BS 8465:2010
液压传动.颗粒污染级别的监控.比较膜技术
Hydraulic fluid power. Monitoring the level of particulate contamination. Comparison membrane technique
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- 标准号
- BS 8465:2010
- 发布
- 2010年
- 发布单位
- 英国标准学会
- 当前最新
- BS 8465:2010
- 适用范围
- This British Standard specifies methods to assess the level of particulate contamination in hydraulic liquids using an optical microscope. It includes assessment by two manual methods using either transmitted- or incident-lighting systems. It also includes procedures for evaluating and controlling the accuracy of the technique that ensure reproducible results. This method is applicable to nearly all hydraulic liquids at a wide range of contamination levels, provided the samples can be filtered. However, the procedure requires modification for samples that are either heavily contaminated (e.g. > ISO -/20/17 according to BS ISO 4406) or lightly contaminated (< ISO -/12/10 according to BS ISO 4406), by decreasing or increasing the volume of sample filtered. This procedure is not applicable to samples that have high concentrations of small (< 3 μm) particles (so called “silt”), gels or where overlapping particles are present on the membrane filter. The method detailed is a qualitative assessment only, not a quantitative evaluation, and it is applicable to all samples where the data has to be expressed in terms of contaminant codes.