ISO 11943:2021

Current Revision
Hydraulic fluid power - Online automatic particle-counting systems for liquids - Methods of calibration and validation

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Hydraulic fluid power - Online automatic particle-counting systems for liquids - Methods of calibration and validation

PUBLISH DATE 2021

This document establishes methods for:

  • validating equipment used to prepare secondary calibration suspensions for automatic particle counters;
  • performing online secondary calibration of automatic particle counters;
  • matching two or more online particle counters, i.e. to count the same number of particles at a given size by two APCs associated online;
  • validating online particle counting systems with and without online dilution as used, for example, to measure the filtration efficiency of a hydraulic filter as described in the multi-pass filter test in ISO 16889.
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