Surface Resistivity Of Esd Mat

10 8 10 9 ohms sq.

Surface resistivity of esd mat. Esd protective working surfaces are categorised into two general categories. Esd materials categories materials for protection and prevention of electrostatic discharge esd can be categorized into three distinct groups separated by their ranges of conductivity to. The surface resistivity of this mat is 10 8 10 9 ohms. Hence the title ansi esd s4 1 worksurfaces resistance measurements.

Dissipative materials have a surface resistivity equal to or greater than 1 x 10 5 ω sq but less than 1 x 10 12 ω sq or a volume resistivity equal to or greater than 1 x 10 4 ω cm but less than 1 x 10 11 ω cm 2. The esd surface resistance test meters are used to measure the resistivity of the esd work surface mats and floor mats. The esd wrist strap test meters verify a continuous path between the wrist band and a coil cord. They have a textured surface and are gray in color.

They are available in rolls of 3 and 4 widths. A conductive working surface is defined by most documents as a material that has a surface resistance of less than 1 x. Custom made esd anti fatigue floor mat kits include an esd anti fatigue mat a heel grounder and a ground cord. Removing the electrostatic charge from conductive objects placed on the working surface.

This requires the use of a surface resistivity esd meter to perform both resistance top to top rtt and resistance to groundable point rtg tests. Per user guide en 61340 5 2 1999 clause 4 1 1 point to point resistance has been discussed rather than the surface and volume resistivity which was found in previous standards and reports. Rtt testing for esd resistance per ansi esd s4 1. Insulative materials are defined as those having a surface resistivity of at least 1 x 10 12 ω sq or a volume resistivity of at least 1 x 10 11 ω cm.

Types of esd working surface. Esd surface resistance meters are portable battery operated survey instruments for evaluating the resistivity properties of. Likewise surface resistivities can be converted to surface resistances by dividing the surface resistivity value by 10. 10 7 10 8 ohms sq.