ISO 11943:2018


Note: Latest version: ISO 11943:2021

Existing or new amendments and versions must be purchased separately.



This document establishes methods to: — validate equipment used to prepare secondary calibration suspensions for automatic particle counters; — perform online secondary calibration of automatic particle counters; — match two or more online particle counters, i.e. to count the same number of particles at a given size by two APCs associated on line; — validate 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 multipass filter test in ISO 16889.

Products specifications

  • Standard from ISO
  • Published:
  • Withdrawn:
  • Period for objection until:
  • Edition: 2
  • Document type: IS
  • Pages
  • Publisher: ISO
  • Distributor: ISO
  • ICS: 23.100.60
  • International TC: ISO/TC 131/SC 6

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