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The example graph provided shows how the oil is degrading faster than expected (the blue line
representing the normal expected behaviour) and a point where this contamination becomes
evident as the oil condition deteriorated further.
12.3.6
TBN Decrease
A decrease in Total Base Number (TBN) is indicated by the exponential decrease in TDN value
with time, also described by the downward curve of the plot.
Figure 81 - TBN Decrease
In the example graph provided, you can see the downward curve in the data clearly emerging
indicating an issue.
12.4
Event Identification & Validation (EIV)
Data returned from the Oil Quality Sensor can be used to identify and validate key events such
as oil changes and oil top-ups. As the Oil Quality Sensor sends back a holistic full spectrum
analysis of the oil condition in the form of a condition number (TDN), the trend of these
returned numbers can be analysed to identify an event such as a maintenance interval or
intervention.
Complete oil changes will show as a direct linear change in the reported oil condition, if the
TDN value returns to the point expected of a new clean oil (1), then the oil change can be
validated as being carried out correctly.
Summary of Contents for OQSExISG2
Page 1: ...UG OQSxG2 23 0025 OIL QUALITY SENSOR ASSOCIATED ACCESSORIES USER GUIDE...
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Page 37: ...Page 35 Figure 19 Connection to other Tan Delta and 3rd Party Products Interfaces...
Page 38: ...Page 36 Figure 20 ExOQSxG2 Ex Sensor Installation Drawing Rev 2 STAMPED...
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