BS ISO 11943:2021
Current
The latest, up-to-date edition.
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12-05-2021
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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