ASTM D1524-94(2010)
(Test Method)Standard Test Method for Visual Examination of Used Electrical Insulating Oils of Petroleum Origin in the Field
Standard Test Method for Visual Examination of Used Electrical Insulating Oils of Petroleum Origin in the Field
SIGNIFICANCE AND USE
By use of this test method the color and condition of a test specimen of oil may be estimated during a field inspection, thus assisting in the decision as to whether or not the sample should be sent to a central laboratory for full evaluation. Cloudiness, particles of insulation, products of metal corrosion, or other undesirable suspended materials, as well as any unusual change in color may be detected. For precise determination of color in the laboratory, Test Method should be used.
SCOPE
1.1 This test method for visual examination is applicable to mineral oils of petroleum origin that have been used in transformers, oil circuit breakers, or other electrical apparatus as insulating or cooling media, or both.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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.
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D1524 − 94(Reapproved 2010)
Standard Test Method for
Visual Examination of Used Electrical Insulating Oils of
Petroleum Origin in the Field
This standard is issued under the fixed designation D1524; 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 thus assisting in the decision as to whether or not the sample
should be sent to a central laboratory for full evaluation.
1.1 This test method for visual examination is applicable to
Cloudiness,particlesofinsulation,productsofmetalcorrosion,
mineral oils of petroleum origin that have been used in
or other undesirable suspended materials, as well as any
transformers, oil circuit breakers, or other electrical apparatus
unusual change in color may be detected. For precise determi-
as insulating or cooling media, or both.
nation of color in the laboratory,Test Method D1500 should be
1.2 The values stated in inch-pound units are to be regarded
used.
as standard. The values given in parentheses are mathematical
5. Apparatus
conversions to SI units that are provided for information only
and are not considered standard.
5.1 Color Comparator —A color comparator suitable for
1.3 This standard does not purport to address all of the estimating the color of petroleum products on theASTM Color
safety concerns, if any, associated with its use. It is the Scale,andfortheexaminationofthetestspecimenbyreflected
responsibility of the user of this standard to establish appro- light (Tyndall beam effect).
priate safety and health practices and determine the applica-
5.2 Light—Alight source such as a pen light with a No. 222
bility of regulatory limitations prior to use.
bulb.
2. Referenced Documents 5.3 Cloth—Photographer’s focusing cloth.
2.1 ASTM Standards:
6. Preparation of Apparatus
D1500 Test Method forASTM Color of Petroleum Products
6.1 Open the front cover of the comparator housing, and
(ASTM Color Scale)
place the center of the color disk on the ring with the number
plates facing the operator. Close the cover. As the disk is
3. Summary of Test Method
rotated, the number plates representingASTM Color Numbers
3.1 The color of the test specimen is estimated by visually
can be read through the upper opening on the right-hand side
comparing the color of a specified thickness of the sample with
of the front cover.The alignment is such that only one figure is
a series of artificial standard color disk filters in a specified
visible when a glass color standard is completely in the field of
comparator.
view.
3.2 The condition of the test specimen is estimated by
6.2 The observation fields for colorimetric comparison can
observation of cloudiness, foreign particles, or suspended
be seen through the two central openings. Through the prism
matter in the sample by reflected light.
attachment, they are seen as half-fields. The right-hand field is
produced by the test specimen in a tube which is placed in the
4. Significance and Use
opening at the right of the instrument, while the left-hand field
4.1 By use of this test method the color and condition of a
is formed by one of the glass color standards.
test specimen of oil may be estimated during a field inspection,
7. Procedure
This test method is under the jurisdiction of ASTM Committee D27 on 7.1 Color Determinations—Fill a tube with the test speci-
Electrical Insulating Liquids and Gases and is the direct responsibility of Subcom-
men to a height convenient for full exposure in the observation
mittee D27.07 on Physical Tests.
Current edition approved May 1, 2010. Published May 2010. Originally
approved in 1968. Last previous edition approved in 2004 as D1524 – 94 (2004). The Hellige Oil Comparator, catalog No. 605-HT, with catalog No. 620C-55
DOI: 10.1520/D1524-94R10. colordisk,availablefromOrbcoHellige,185TMarineSt.,Farmingdale,NY11735,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or has been found to be suitable. This equipment may be modified to accommodate a
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM TyndallBeamAccessory.Aprismmagnifierattachment,CatalogNo.600-PA,isalso
Standards volume information, refer to the standard’s Document Summary page on availableifdesired.AHelligeComparator,catalogNo.607-OC,hasalsobeenfound
the ASTM website. suitable but is less convenient for field use.
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D1524 − 9
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