ASTM D257绝缘材料直流电阻或电导率标准试验方法
日期:2012-02-10 11:07
es 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 D 4496 to evaluate such materials.
1.3 This standard describes 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 elec
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