ISO 11171:2022

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Hydraulic fluid power - Calibration of automatic particle counters for liquids

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Hydraulic fluid power - Calibration of automatic particle counters for liquids

PUBLISH DATE 2022

This document specifies procedures for the following:

  • a) primary particle-sizing calibration for particle sizes 1 µm(c) and larger, sensor resolution and counting performance of liquid automatic particle counters that are capable of analysing bottle samples;
  • b) secondary particle-sizing calibration using suspensions verified with a primary calibrated APC;
  • c) establishing acceptable operation and performance limits;
  • d) verifying particle sensor performance using a test dust;
  • e) determining coincidence and flow rate limits.

This document is applicable for use with hydraulic fluids, aviation and diesel fuels, engine oil and other petroleum-based fluids.

This document is not applicable to particle-sizing calibration using NIST SRM 2806b primary calibration suspensions.

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