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This test method covers the laboratory procedure that ascertains the quantity of suspensions in insulating oils of petroleum origin using a nephelometric measurement technique to determine the fluid's turbidity. This test method is designed to reveal changes that may occur to these oils.
Formerly under the jurisdiction of Committee D27 on Electrical Insulating Liquids and Gases, this test method was withdrawn in January 2012 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
1.1 This test method covers the laboratory procedure that ascertains the quantity of suspensions in insulating oils of petroleum origin using a nephelometric measurement technique to determine the fluid's turbidity. This test method is designed to reveal changes that may occur to these oils.
1.2 This test method is applicable for turbidities in the range of 0.1 to 500 Nephelometric Turbidity Units (NTU).
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D923 Test Method for Sampling Electrical Insulating Liquids
D1533 Test Methods for Water in Insulating Liquids (Karl Fischer Reaction Method)
D1698 Test Method for Sediments and Soluble Sludge in Service Aged Insulating Oils
D1889 Test Method for Turbidity of Water
D4652 Specification for Silicone Fluid Used for Electrical Insulation
D5180 Test Method for Quantitative Test for Turbidity in Clear Liquids
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
ASTM D6181-03, Standard Test Method for Measurement of Turbidity in Mineral Insulating Oil of Petroleum Origin (Withdrawn 2012), ASTM International, West Conshohocken, PA, 2003, www.astm.orgBack to Top