ASTM D2129-05

Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)

SIGNIFICANCE AND USE
Color is significant chiefly as an indicator of contamination in electrical insulating liquids. Frequently this contamination is the result of solvent action in the apparatus involved or it may indicate possible contamination. No definite relationship can be established between color and the physical and electrical characteristics of the liquid; for that reason color in itself has limited value as a measure of condition. For more precise determination of color, Test Method D 1209 may be used.
SCOPE
1.1 This standard describes a test method for the visual determination of the color of clear insulating liquids.
1.2 The values stated in acceptable metric units are to be regarded as the standard.
1.3 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.

General Information

• Status: Historical
• Publication Date: 30-Nov-2005
• Technical Committee: D27 - Electrical Insulating Liquids and Gases
• Drafting Committee: D27.07 - Physical Test

Relations

• Replaces: ASTM D2129-97 - Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)
• Effective Date: 01-Dec-2005
• Replaced By: ASTM D2129-05(2010) - Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)
• Effective Date: 01-Nov-2010
• Referred By: ASTM D2225-20 - Standard Test Methods for Silicone Liquids Used for Electrical Insulation
• Effective Date: 01-Dec-2005
• Referred By: ASTM D8240-22e1 - Standard Specification for Less-Flammable Synthetic Ester Liquids Used in Electrical Apparatus
• Effective Date: 01-Dec-2005
• Referred By: ASTM D5282-05(2020) - Standard Test Methods for Compatibility of Construction Material with Silicone Fluid Used for Electrical Insulation
• Effective Date: 01-Dec-2005
• Referred By: ASTM D1524-15(2022) - Standard Test Method for Visual Examination of Used Electrical Insulating Liquids in the Field
• Effective Date: 01-Dec-2005
• Referred By: ASTM D117-22 - Standard Guide for Sampling, Test Methods, and Specifications for Electrical Insulating Liquids
• Effective Date: 01-Dec-2005
• Referred By: ASTM D4652-20 - Standard Specification for Silicone Liquid Used for Electrical Insulation
• Effective Date: 01-Dec-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D2129–05
Standard Test Method for
Color of Clear Electrical
1
Insulating Liquids (Platinum-Cobalt Scale)
This standard is issued under the fixed designation D2129; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
4.1 Color is significant chiefly as an indicator of contami-
1.1 This standard describes a test method for the visual
determination of the color of clear insulating liquids. nation in electrical insulating liquids. Frequently this contami-
1.2 The values stated in acceptable metric units are to be nation is the result of solvent action in the apparatus involved
regarded as the standard. or it may indicate possible contamination. No definite relation-
1.3 This standard does not purport to address all of the ship can be established between color and the physical and
safety concerns, if any, associated with its use. It is the electrical characteristics of the liquid; for that reason color in
responsibility of the user of this standard to establish appro- itself has limited value as a measure of condition. For more
priate safety and health practices and determine the applica- precise determination of color, Test Method D1209 may be
bility of regulatory limitations prior to use. used.
2. Referenced Documents 5. Apparatus
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2.1 ASTM Standards: 5.1 Color Comparison Tubes—Matched, tall-form Nessler
D1193 Specification for Reagent Water tubes, graduated at the 50-mL mark, and provided with
D1209 Test Method for Color of Clear Liquids (Platinum- ground-on, optically clear glass caps.
Cobalt Scale) 5.2 Color Comparator—A color comparator constructed to
D1500 TestMethodforASTMColorofPetroleumProducts permit visual comparison of light transmitted through tall-form
(ASTM Color Scale) Nessler tubes in the direction of their longitudinal axes. The
comparator should be constructed so that white light is passed
3. Summary of Test Method
through or reflected off a white glass plate and directed with
3.1 The color determined by this test method is derived by equal intensity through the tubes, and should be shielded so
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comparing the color of the test specimen with that of a series that no light enters the tubes from the side.
of numbered color reference standards using transmitted light
6. Reagents
under prescribed conditions. The procedure described is based
on that for measuring the color of water and clear liquids 6.1 Purity of Reagents—Use reagent grade chemicals in all
according to the platinum-cobalt scale. This scale is suitable tests. Unless otherwise indicated, all reagents will conform to
formeasurementsoverthecolorrangefrom5to300.Thecolor the specifications of the Committee on Analytical Reagents of
of test specimens darker than 300 on the platinum-cobalt scale the American Chemical Society, where such specifications are
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must be measured according to the ASTM Color Scale as available. Other grades may be used, provided it is first
described in Test Method D1500. The use of the platinum- ascertained that the reagent is of sufficiently high purity to
cobalt scale in this way is primarily of value as an expansion permit its use without lessening the accuracy of the determi-
of the lower part of the ASTM Color Scale, especially in the nation.
range between 0 and 1. 6.2 Purity of Water—Use reagent water conforming to
Specification D1193.
6.3 Solvent, suitable, clear.
6.4 Cobaltous Chloride (CoCl ·6H O).
1
2 2
This test method is under the jurisdiction of ASTM Committee on D27 on
Electrical Insulating Liquids and Gases and is the direct responsibility of Subcom-
mittee D27.07 on Physical Tests.
3
Current edition approved Dec. 1, 2005. Published December 2005. Originally A unit available from Scientific Glass and Instruments, Inc. P.O. Box 6,
approved in 1962 as D2129 - 62 T. Last previous edition approved in 1997 as Houston, TX 77001, has been found suitable for this purpose.
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D2129 - 97. DOI: 10.1520/D2129-05. “Reagent Chemicals,American Chemical Society Specifications,”Am. Chemi-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM theAmerican Chemical Society, see “Reagent Chemicals and Standards,” by Joseph
Standards volume information, refer to the standard’s Document Summary page on Rosin, D. Van Nostrand Co., Inc., New York, NY and the “United States
the ASTM website. Pharmacopeia.”
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