LUBE OIL TESTS
Ther are three types of tests that are normally done on ship
2. Viscosity Test
- Drop test
- Viscosity test
- Water content test
- Drop Test
- Take a drop of lube oil from the sample and put it on a filter paper.
- Wait till the filter paper observe the oil.
- If the stain on filter paper is light and clear it indicates the oil is fresh and can be used.
- If the stain is uniformly dark it indicates the oil is in use for some time and can be used.
- If the stain is very dark it indicates oil should be renewed at the earliest opportunity.
- If the oil is contaminated with diesel or water the stain will not uniform.
- The center will be dark and the periphery will be light.
2. Viscosity Test
- In the viscosity test the flow of sample is compared with flow of fresh oil.
- If the difference in the levels between tubes are negligible then the lube is good. You can use it for some more time.
- If the level in the two sample reads either too high or too low then it indicates contamination. Change the lube oil immediately.
3. Water Test
- Water test kit is used to measure the water content in lubricants..
- Take a small quantity of the lubricant to be tested, along with dry solvent and calcium hydride in a vessel.
- Calcium hydride react with the water, producing hydrogen gas.
- The pressure displayed on the gauge is proportional to the percentage or ppm of the water present in the solvent.
- The gauge can display water content from 10 to 120,000 ppm over five ranges.
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