IDENTIFY CONTAMINATION QUICKLY
- Identify wear debris
- Schedule corrective action
- Identify abnormal levels of contamination
The way a sample is collected, the accessories used and procedures followed dictate how informative the oil sample will be and how beneficial the analysis will be. That is why it is of great importance that the sample be taken correctly.
Fluid contamination is a leading cause of slower performance, erratic operation, lost productivity, higher operating costs and catastrophic failure of machines. If the oil sample taken is not representative of the oil in the machine then the results of the oil sample will not accurately reflect the condition of that component.
The result will be an incorrect diagnosis based on incorrect analysis because of a poorly taken sample.
The practice of transferring suspended particles to the surface of a membrane for analysis has been around for decades. It is perhaps the earliest method for inspecting solid contaminants and wear debris in a used sample of oil. The simple patch test enables the technician to quickly identify abnormal levels of contamination and wear debris so that corrective actions can be scheduled accordingly.
A sample of oil is pulled through a 1.2 or 5 micron membrane by a vacuum pump after the sample is diluted in solvent. Particles larger than the pore size remain on the membrane’s surface for later inspection. Low power microscopes can be used for this, but often the patch is simply examined without magnification using patch comparators.
|Label No||Description||Label No||Description|
|1||Microscope with 3.0MP digital camera & accessories||10||Comparison photo book|
|2||Vacuum pump||11||Clear suction tube|
|3||Vacuum flask 1L||12||Pump for pressure sprayer|
|4||Filter holder kit, 250mL funnel & holding clamp||13||Adjustable wrench|
|5||Plastic beaker 500mL||14||Mini LED torch|
|6||Plastic funnel 66mL||15||47mm membranes 1.2μm|
|7||Rinse dispenser – Pressure sprayer kit||16||47mm membranes 3μm|
|8||25mm membranes, 1.2μm||17||47mm membranes 5μm|
This video, “Fluid contamination – The Silent Thief,” details the importance of following strict procedures and guidelines to keep your engines and components clean so you can maximize machine productivity and component life.
References and Acknowledgements:
Machinery and Lubrication Magazine
Wearcheck Technical Bulletin # 49