This International Standard specifies methods for reporting data relative to contamination levels of hydraulic fluids used in industrial, mobile and marine applications for the following types of contamination analysis techniques:
a) microscopic particle counting;
b) automatic particle counter;
c) gravimetric.
This International Standard is intended to establish the minimum information required to allow valid comparison and interpretation of contamination level data.
DS/ISO 3938:1989 history
1989DS/ISO 3938:1989 Hydraulic fluid power. Contamination analysis. Method for reporting analysis data