BS ISO 16889 : 2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 General procedure
6 Test equipment
7 Measuring instrument accuracy and test
   condition variations
8 Filter performance test circuit validation
   procedures
   8.1 Filter test system validation
   8.2 Validation of contaminant injection system
9 Summary of information required prior to testing
10 Preliminary preparation
   10.1 Test filter assembly
   10.2 Contaminant injection system
   10.3 Filter test system
11 Filter performance test
12 Calculations
13 Data presentation
14 Identification statement (reference to this
   International Standard)
Annex A (normative) - Base test-fluid properties
Annex B (informative) - Test system design guide
Annex C (informative) - Examples of report calculations
        and graphs
Annex D (informative) - Summary of data from the round
        robin test programme conducted to verify the
        procedure in this International Standard
Bibliography

Specifies a multi-pass filtration performance test with continuous contaminant injection for hydraulic fluid power filter elements; a procedure for determining the contaminant capacity, particulate removal and differential pressure characteristics; a test currently applicable to hydraulic fluid power filter elements that exhibit an average filtration ratio greater than or equal to 75 for particle sizes less than or equal to 25 [mu]m(c), and a final reservoir gravimetric level of less than 200 mg/L; and a test using ISO medium test dust contaminant and a test fluid in accordance with Annex A.