Particle Insight Raptor
Compliance to D7596-14 Particle Test Method for Shape Classification of Oils
The ASTM D7596-14 (ASTM, 2018) was designed as a guide for the determination of particle concentration, particle size distribution, particle shape, and soot content for new and in service oils used for lubrication and hydraulic systems using a direct imaging integrated tester. Historical methods for particulate detection and reporting in oils are addressed by methods specifying light blockage techniques and microscopy. Guidelines such as ISO4406, NAS1638, and NAVAIR have been put in place to set reporting formats and document measurement methods related to light blockage techniques as well as microscopy. With advances in imaging technology, applying dynamic image analysis to oil contamination detection and monitoring was a logical step forward, offering more information to make even better decisions on equipment oil being evaluated. Also, being a number-based technique, its ability to give particle count as well as particle concentration makes dynamic image analysis a very good compliment to existing techniques. Although there are other documents that discuss the use of dynamic image analysis as a suitable and comparable technique for this industry, this document is focused on how the Particle Insight Raptor, designed for the lubrication oil market, complies and in most cases, far exceeds the D7596 standard. Below is an overview of some of the key sections of the standard test method, an explanation of what this means for the end user and how the Particle Insight Raptor complies.
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