ASTM D257

Surface Resistivity, Volume Resistivity

Purpose: This test is used to determine the surface resistivity and volume of insulating materials.

Sample: Flat plaques, 4 x 4 x up to 0.125 inches thick

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Basic Description: The flat plaque is placed between 2 metal electrodes, the resistance (ohm) is measured after 60 seconds and surface or volume resistivity is calculated.

Test Capacity:   1 x 10^9 to 1×10^17 ohms square

Method Publisher:  https://www.astm.org/d0257-14r21e01.html

Keywords:

• Surface Resistivity
• Volume Resistivity

Related Test Methods:

• ASTM D149 – Dielectric Strength, Dielectric Breakdown Voltage
• ASTM D150 – Permittivity (Dielectric Constant), Dissipation Factor