Baltech OA-5000 Manuale operativo - Pagina 10
Sfoglia online o scarica il pdf Manuale operativo per Apparecchiature di laboratorio Baltech OA-5000. Baltech OA-5000 14. Mini-lab for checking the oil condition
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Operation manual
5. Contamination effects
The usual contamination found in oils is caused by oxidation and acid build
up, these occur during the normal running of an engine and should show up
as a gradual increase in readings over a period of time or distance. Other
contaminants occur because of excessive wear or mechanical failure, the main
elements of which are dirt, soot, fuel, water, anti-freeze and metal particles.
These elements give a marked increase in the Oil check monitor's reading and
will give immediate warning of possible resulting failure.
1. Water and anti-freeze contamination will cause a dramatic change in the
reading, which will move the segments well into the red.
2. Metal particles will also cause an extreme reading though the display
should move up in small jumps as the particles settle on the sensor surface.
3. Fuel is harder to detect as its presence will sometimes mask the presence
of other contaminants. If the oil is only contaminated by fuel the display will
show it as a stronger reading well into the red but the presence of water or
metal will sometimes counteract the fuel giving a reading in the green. Should
an engine oil continue to show no increase in its reading over a period of time
the possibility of fuel contamination should be investigated.
4. Changes in the viscosity of the oil will cause a slow reduction of the
dielectric constant, which will be difficult to detect.
5. Changes of the acidity will typically reduce the dielectric strength in a
detectable manner.
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Contamination effects