Overview of measurements in accordance with AATCC 76-2000 Electrical Surface Resistivity of Fabrics
AATCC 76-2000 Electrical Surface Resistivity of Fabrics covers test methods for the measurement of surface resistivity of various woven fabrics. This test method is applicable for resistivity measurements generally above 107Ω-cm or 107Ω (per square). This testing is performed, for example, to determine how the surface resistance affects the electrostatic dissipation of a fabric. The testing uses a surface resistivity cell in combination with a megohmmeter. A sample of the fabric is placed between two electrodes in the cell, the megohmmeter is then used to measure the resistance, at a specific applied voltage, after 60 seconds. The surface resistivity is then calculated from the measured resistance using a simple formula.
The same measurement setup can be used for testing materials in accordance with ASTM D257. The IET 1865 + Megohmmeter and 1865-11 Test Cell can be combined to make a complete system for measurement of volume and surface resistivity. This combination is used by a number of respected companies and test laboratories for this application. The 1865 Plus can easily be programmed to apply the required voltage to the material and display the resistance after 60 seconds. Also see Overview of ASTM D257 and IEC 60093