CMS/User Guide - Filterteknik

Appendix BISO4406:1999 Cleanliness Code SystemThe International Standards Organizationstandard ISO 4406:1999is the preferred method of quotingthe number of solid contaminantparticles in a sample.The code is constructed from thecombination of three scale numbersselected from the followingtable.The first scale number representsthe number of particles in a millilitresample of the fluid that arelarger than 4 µm(c).The second number represents thenumber of particles larger than 6µm(c).The third represents the numberof particles that are larger than 14µm(c).ISO4406:1999 Cleanliness Code System 63