Transcription of Standard Test Methods for DC Resistance or Conductance …
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Standard Test Methods for DC Resistance or Conductance …
Designation: D257 07An American National StandardStandard Test Methods forDC Resistance or Conductance of insulating materials1 This Standard is issued under the fixed designation D257; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon ( ) indicates an editorial change since the last revision or Standard has been approved for use by agencies of the Department of Scope* These test Methods cover direct-current procedures forthe measurement of dc insulation Resistance , volume Resistance ,and surface Resistance . From such measurements and thegeometric dimensions of specimen and electrodes, both vol-ume and surface resistivity of electrical insulating materialscan be calculated, as well as the corresponding conductancesand These test Methods are not suitable for use in measuringthe electrical Resistance / Conductance of moderately conductivematerials.
Standard Test Methods for DC Resistance or Conductance of Insulating Materials1 This standard is issued under the fixed designation D257; 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.
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