ISO 11171

The ISO standard ISO 11171 defines a standardized calibration of particle counters for liquids. Since deteriorate the properties of hydraulic fluids with increasing degree of contamination, the ISO 11171 calibrated particle counter are mainly used for contamination control in hydraulic systems.

By the norm is defined as the various parameters are calibrated and which deviations are permitted. Thus, the following parameters must be calibrated for a full calibration of the particle counter:

  • Murmur
  • Actually measured volume of liquid
  • Coincidence error
  • Particle sizes
  • Flow rate and limitations
  • Resolution of a specific particle size
  • Partikelzählgenauigkeit
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