ASTM D1531-01

Standard Test Methods for Relative Permittivity (Dielectric Constant) and Dissipation Factor by Fluid Displacement Procedures

SCOPE
1.1 These test methods provide techniques for the determination of the relative (Note 1) permittivity and the dissipation factor of solid insulating materials by fluid (Note 1) displacement.
Note 1--In common usage, the word "relative" is frequently dropped.
Note 2--The word "fluid" is a commonly used synonym for "liquid'' and yet a gas is also a fluid. In these test methods the words fluid and liquid appear as synonyms, but the word fluid is also used to show that liquid is not all that is meant.
1.2 Test Method A is especially suited to the precise measurements on polyethylene sheeting at 23oC and at frequencies between 1 kHz and 1 MHz. It may also be used at other frequencies and temperatures to make measurements on other materials in sheet form.
1.3 Test Method B is limited to the frequency range of available guarded bridges. It is especially suited to measurements on very thin films since it does not require determination of the thickness of the specimen. The test method provides an estimate of the thickness of thin films which is more accurate and precise than thickness measurements obtained by other means.
1.4 Test Method B is also useful for measurements of polymer sheeting up to 2 mm thickness.
1.5 These test methods permit calculation of the dissipation factor of the specimens tested.
1.6 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. For a specific precautionary statement, see Note 3.
1.7 The values stated in SI units are to be regarded as the standard.

General Information

• Status: Historical
• Publication Date: 09-Mar-2001
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.12 - Electrical Tests

Relations

• Replaces: ASTM D1531-95 - Standard Test Methods for Relative Permittivity (Dielectric Constant) and Dissipation Factor by Fluid Displacement Procedures
• Effective Date: 10-Mar-2001
• Replaced By: ASTM D1531-01e1 - Standard Test Methods for Relative Permittivity (Dielectric Constant) and Dissipation Factor by Fluid Displacement Procedures
• Effective Date: 10-Mar-2001
• Referred By: ASTM D150-22 - Standard Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation
• Effective Date: 10-Mar-2001
• Referred By: ASTM D4976-12a(2020) - Standard Specification for Polyethylene Plastics Molding and Extrusion Materials
• Effective Date: 10-Mar-2001
• Referred By: ASTM D2305-18 - Standard Test Methods for Polymeric Films Used for Electrical Insulation
• Effective Date: 10-Mar-2001
• Referred By: ASTM D4101-17e1 - Standard Classification System and Basis for Specification for Polypropylene Injection and Extrusion Materials
• Effective Date: 10-Mar-2001
• Referred By: ASTM D1248-16 - Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable
• Effective Date: 10-Mar-2001

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
An American National Standard
Designation:D1531–01
Standard Test Methods for
Relative Permittivity (Dielectric Constant) and Dissipation
1
Factor by Fluid Displacement Procedures
This standard is issued under the fixed designation D1531; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 2. Referenced Documents
1.1 These test methods provide techniques for the determi- 2.1 ASTM Standards:
nation of the relative (Note 1) permittivity and the dissipation D150 Test Methods for AC Loss Characteristics and Per-
factor of solid insulating materials by fluid (Note 2) displace- mittivity (Dielectric Constant) of Solid Electrical Insulat-
3
ment. ing Materials
D374 Test Methods for Thickness of Solid Electrical Insu-
NOTE 1—In common usage, the word “relative” is frequently dropped.
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lation
NOTE 2—The word “fluid” is a commonly used synonym for “liquid’’
D6054 Practice for Conditioning Electrical Insulating Ma-
and yet a gas is also a fluid. In these test methods the words fluid and
4
liquid appear as synonyms, but the word fluid is also used to show that terials for Testing
liquid is not all that is meant.
D831 Test Method for Gas Content of Cable and Capacitor
5
Oils
1.2 Test Method A is especially suited to the precise
D924 TestMethodforDissipationFactor(orPowerFactor)
measurements on polyethylene sheeting at 23°C and at fre-
and Relative Permittivity (Dielectric Constant) of Electri-
quencies between 1 kHz and 1 MHz. It may also be used at
5
2
cal Insulating Liquids
other frequencies and temperatures to make measurements on
3
D1711 Terminology Relating to Electrical Insulation
other materials in sheet form.
6
E1 Specification for ASTM Thermometers
1.3 Test Method B is limited to the frequency range of
available guarded bridges. It is especially suited to measure-
3. Terminology
mentsonverythinfilmssinceitdoesnotrequiredetermination
3.1 Definitions—Definitions are in accordance with Termi-
of the thickness of the specimen. The test method provides an
nology D1711.
estimate of the thickness of thin films which is more accurate
3.2 Description of a Term Specific to This Standard:
and precise than thickness measurements obtained by other
3.2.1 compatibility, n—A fluid is considered compatible
means.
with a test specimen if, during the time required to complete a
1.4 Test Method B is also useful for measurements of
testofthespecimeninthefluidatthespecifiedtemperatureand
polymer sheeting up to 2 mm thickness.
frequency, the calculated permittivity of the specimen does not
1.5 These test methods permit calculation of the dissipation
change by more than 0.1%, and the dissipation factor change
factor of the specimens tested.
is less than 0.0001.
1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Summary of Test Methods
responsibility of the user of this standard to establish appro-
4.1 Test Method A— The single fluid technique:
priate safety and health practices and determine the applica-
4.1.1 Measurements are made with a fixed-plate, two-
bility of regulatory limitations prior to use. For a specific
terminal self-shielded test cell assembly. By two measure-
precautionary statement, see Note 3.
ments,onewiththecellfilledwiththefluid(whichinthiscase
1.7 The values stated in SI units are to be regarded as the
is a liquid) only and the second one with the solid specimen
standard.
immersed in the liquid, a change in capacitance is determined.
This capacitance difference is used with the approximate
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These test methods are under the jurisdiction of ASTM Committee D09 on
thickness of the specimen, the plate spacing, and the precisely
Electrical and Electronic Insulating Materials and are the direct responsibility of
Subcommittee D09.12 on Electrical Tests.
Current edition approved Mar. 10, 2001. Published May 2001. Originally
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published as D1531–58 T. Last previous edition D1531–95. Annual Book of ASTM Standards, Vol. 10.01.
2 4
Coutlee, K. G., “Liquid Displacement Test Cell for Dielectric Constant and Annual Book of ASTM Standards, Vol. 10.02.
5
Dissipation Factor up to 100 Mc,” 1959 Annual Report, Conference on Electrical Annual Book of ASTM Standards, Vol. 10.03.
6
Insulation, National Research Council, Publication 756, Washington, DC. Annual Book of ASTM Standards, Vol. 14.03.
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