ISO 4548-12:2000 specifies a multi-pass filtration test with continuous contaminant injection and online particle counting for evaluating full-flow lubricating oil filters used in internal combustion engines. The standard determines filter contaminant capacity, particulate removal characteristics, filtration efficiency, and differential pressure.
It covers test equipment, materials, test fluid and contaminant requirements, measuring instrument accuracy, test rig validation, preliminary preparation, test procedures, calculations, and test reporting. Normative annexes provide test fluid specifications and filter efficiency calculations, while an informative annex includes typical filter test reports.
Application Scope: Suitable for testing full-flow lubricating oil filter elements with rated flows from 4 L/min to 600 L/min, particularly for automotive, industrial, and internal combustion engine filter performance evaluation.
