Standard oil testing evaluates dielectric performance, contamination, and aging chemistry. Key parameters include BDV, moisture content, dissipation factor, resistivity, acidity, interfacial tension, and DGA for fault gases. DGA is central to condition monitoring and is commonly tied to standardized approaches such as ASTM D3612. Many programs add inhibitor content, particle count, color, and furan analysis. The parameters are interpreted together because one result rarely tells the whole story: for example low BDV often correlates with high moisture or particles, while rising acidity often correlates with falling interfacial tension and increasing tan delta.
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