Looking to make measurement in accordance with ASTM-D257 & IEC 60093/ IEC 62631-3 Standards?

IEC 60993 and ASTM D-257 cover test methods for the measurement of volume resistivity and surface resistivity of insulating materials. This test method is applicable for resistivity measurements generally above 10⁷Ω-cm or 10⁷Ω (per square).to 10 Ω^13.  This testing is performed to ensure the material meets the required minimum and maximum resistivity values. The testing uses a volume/surface resistivity cell in combination with a precision megohmmeter.  With its 0.5% accuracy and voltage flexibility, the IET 1865+ was designed for this purpose.

See a short video on how to use the IET Labs 1865+ Megohmmeter with the 1865-11 Test Cell to accomplish this ASTM-D257 Test

Test Sample Resistivity Measurements

The 1865+ can be used for measuring the resistivity of test samples as described by ASTM Standard D 257, which describes in detail the techniques for both surface and volume resistivity measurements. The 1865-11 Test Cell is shown in Figure 3-1

A sample of the material 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 volume resistivity or surface resistivity is then calculated from the measured resistance using a simple formula.

A similar measurement setup can be used for testing materials in accordance with AATCC 76-2000 for electrical surface resistivity of fabrics and ESD S11.11 for elelctrostatic planar materials. 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

Do you need to make measurements to ASTM D257 and IEC 60093 cleanroom-garment-selection and testing standards

Intertek Plastics Technology Laboratory (Laboratory that performs testing to ASTM D257)