D1698-97
Standard Test Method for Sediments and Soluble Sludge in Service-Aged Insulating Oils

1.1 This test method covers the determination of sediment and soluble sludge in service-aged insulating oils of petroleum origin. Also, provision is made for determining organic and inorganic content of the sediment. The method is intended primarily for oils of comparatively low viscosity; for example 5.7 to 13.0 cSt at 40°C (104°F). Suitability for high viscosity oils have not been determined.

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