![]() ![]() Commonly known as the ISO Code, ISO 4406 reports data in the form of X/Y/Z, where X, Y, and Z are integers whose values correspond to the number concentration of particles larger than 4, 6, and 14 µm(c). ISO 4406 provides a standardized method of reporting particle count data. Fortunately, ISO 4406 provides a simplified method of communicating this complex information in a way that facilitates both interpretation and understanding of particle count data. 1, the magnitudes of the concentration data for these sizes typically ranges over 2 to 3 orders of magnitude, while the slope of concentration versus size data provides important context for the interpretation. Analysts must consider concentration data for at least three different particle sizes.Īs shown in Fig. ![]() Unfortunately, interpretation of the raw particle count data is not always straightforward. Particle count data is expressed in terms of the number concentration of particles larger than a certain size per unit volume of fluid. Automatic particle counting provides a cost-effective way to monitor fluid cleanliness levels and ensure reliable equipment operation. It has been estimated, in commonly available literature 1, that between 75 and 90 percent of hydraulic system failures may be attributed to contamination issues. Posted on by Fluid Power Journal in Features 0 Commentsīy Barry Verdegan, Ph.D., Research Fellow, Cummins Filtrations, Inc. ![]()
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