Estimate remaining useful life of hydraulic fluid from TAN, TBN, and oxidation values
Input Parameters
Results
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TAN Increase
mg KOH/g
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Additive Depletion
%
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Remaining Life
hours
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Change Recommendation
Reference
TAN = Total Acid Number (oxidation indicator)
New mineral oil TAN: 0.3-0.8
Condemning limit: typically 2.0 mg KOH/g
Linear extrapolation provides conservative estimate