ISO 11943:2021 PDF

Scope: 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 11943:2021 Referenced Document

ISO 11171 Hydraulic fluid power — Calibration of automatic particle counters for liquids*， 2022-03-18 Update
ISO 12103-1 Road vehicles — Test contaminants for filter evaluation — Part 1: Arizona test dust*， 2024-01-23 Update
ISO 16889 Hydraulic fluid power — Filters — Multi-pass method for evaluating filtration performance of a filter element*， 2022-01-25 Update
ISO 4021 Hydraulic fluid power; particulate contamination analysis; extraction of fluid samples from lines of an operating system
ISO 5598 Fluid power systems and components — Vocabulary
ISO 80000-1 Quantities and units - Part 1: General*， 2022-12-06 Update

2021 ISO 11943:2021 Hydraulic fluid power — Online automatic particle-counting systems for liquids — Methods of calibration and validation
2018 ISO 11943:2018 Hydraulic fluid power - Online automatic particle-counting systems for liquids - Methods of calibration and validation
1999 ISO 11943:1999 Hydraulic fluid power - On-line automatic particle-counting systems for liquids - Methods of calibration and validation