ASTM D257 - 14(2021)e1 - Standard Test Methods for DC Resistance or Conductance of Insulating Materials

ASTM D257 - 14(2021)e1

Standard Test Methods for DC Resistance or Conductance of Insulating Materials

Status : Current   Published : March 2021

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PDF

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HARDCOPY



1.1?These test methods cover direct-current procedures for the measurement of dc insulation resistance, volume resistance, and surface resistance. From such measurements and the geometric dimensions of specimen and electrodes, both volume and surface resistivity of electrical insulating materials can be calculated, as well as the corresponding conductances and conductivities.

1.2?These test methods are not suitable for use in measuring the electrical resistance/conductance of moderately conductive materials. Use Test Method D4496 to evaluate such materials.

1.3?These test methods describe several general alternative methodologies for measuring resistance (or conductance). Specific materials can be tested most appropriately by using standard ASTM test methods applicable to the specific material that define both voltage stress limits and finite electrification times as well as specimen configuration and electrode geometry. These individual specific test methodologies would be better able to define the precision and bias for the determination.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5? This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.




Standard NumberASTM D257 - 14(2021)e1
TitleStandard Test Methods for DC Resistance or Conductance of Insulating Materials
StatusCurrent
Publication Date01 March 2021
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors DC resistance, insulation resistance, surface resistance, surface resistivity, volume resistance, volume resistivity
ICS29.035.01
PublisherASTM
FormatA4
DeliveryYes
Pages18
File Size483 KB
Price£47.00


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