ASTM D2129-05(2010)
(Test Method)Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)
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 D1209 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 SI units are to be regarded as standard. No other units of measurement are included in this 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
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D2129 − 05 (Reapproved 2010)
Standard Test Method for
Color of Clear Electrical
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 of the lower part of the ASTM Color Scale, especially in the
range between 0 and 1.
1.1 This standard describes a test method for the visual
determination of the color of clear insulating liquids.
4. Significance and Use
1.2 The values stated in SI units are to be regarded as
4.1 Color is significant chiefly as an indicator of contami-
standard. No other units of measurement are included in this
nation in electrical insulating liquids. Frequently this contami-
standard.
nation is the result of solvent action in the apparatus involved
1.3 This standard does not purport to address all of the
or it may indicate possible contamination. No definite relation-
safety concerns, if any, associated with its use. It is the
ship can be established between color and the physical and
responsibility of the user of this standard to establish appro-
electrical characteristics of the liquid; for that reason color in
priate safety and health practices and determine the applica-
itself has limited value as a measure of condition. For more
bility of regulatory limitations prior to use.
precise determination of color, Test Method D1209 may be
used.
2. Referenced Documents
5. Apparatus
2.1 ASTM Standards:
D1193 Specification for Reagent Water
5.1 Color Comparison Tubes—Matched, tall-form Nessler
D1209 Test Method for Color of Clear Liquids (Platinum-
tubes, graduated at the 50-mL mark, and provided with
Cobalt Scale)
ground-on, optically clear glass caps.
D1500 Test Method forASTM Color of Petroleum Products
5.2 Color Comparator—A color comparator constructed to
(ASTM Color Scale)
permit visual comparison of light transmitted through tall-form
Nessler tubes in the direction of their longitudinal axes. The
3. Summary of Test Method
comparator should be constructed so that white light is passed
3.1 The color determined by this test method is derived by
through or reflected off a white glass plate and directed with
comparing the color of the test specimen with that of a series
equal intensity through the tubes, and should be shielded so
of numbered color reference standards using transmitted light 3
that no light enters the tubes from the side.
under prescribed conditions. The procedure described is based
on that for measuring the color of water and clear liquids
6. Reagents
according to the platinum-cobalt scale. This scale is suitable
6.1 Purity of Reagents—Use reagent grade chemicals in all
formeasurementsoverthecolorrangefrom5to300.Thecolor
tests. Unless otherwise indicated, all reagents will conform to
of test specimens darker than 300 on the platinum-cobalt scale
the specifications of the Committee on Analytical Reagents of
must be measured according to the ASTM Color Scale as
the American Chemical Society, where such specifications are
described in Test Method D1500. The use of the platinum-
available. Other grades may be used, provided it is first
cobalt scale in this way is primarily of value as an expansion
ascertained that the reagent is of sufficiently high purity to
permit its use without lessening the accuracy of the determi-
1 nation.
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 Test.
Current edition approved Nov. 1, 2010. Published November 2010. 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 2005 as Houston, TX 77001, has been found suitable for this purpose.
D2129 - 05. DOI: 10.1520/D2129-05R10. “Reagent Chemicals,American Chemical Society Specifications,”Am. Chemi-
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 service@astm.org. 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.”
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D2129 − 05 (2010)
6.2 Purity of Water—Use reagent water conforming to 8. Procedure
Specification D1193.
8.1 Introduce 50 mL of the test specimen into a Nessler
tube,passingthesamplethroughafilterifithasanyvisibletest
6.3 Solvent, suitable, clear.
specimen turbidity. Cap the tube, place in the comparator, and
6.4 Cobaltous Chloride (CoCl ·6H O).
2 2
compare with the standards.
6.5 Hydrochloric Acid (sp gr 1.19)—Concentrated hydro-
...
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