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Three common methods of establishing fuel or oil cleanliness levels
Patch test kit
A patch test kit provides everything that’s needed to make an enterprise self-sufficient in identifying the type and level of contamination in fluid power systems in a process or manufacturing environment. Patch testing allows rapid testing and analysis and it is very effective in determining the source of contamination, in a manufacturing process for example.
The testing process starts with a representative oil sample being taken from a reservoir or from a Minimess test point in a hydraulic circuit. A sample of the fluid is passed through a filter membrane, using a vacuum pump, dried and mounted in a membrane holder ready for a visual assessment under a digital microscope. Comparator slides are used to help establish cleanliness levels in the sample. The supplied filter colour rating and particle assessment scales correspond to ISO 4407, the international standard for particulate contamination of fluids determined by the counting method using a microscope.
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