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Packaging materials, workstation mats, and flooring
that is designed to dissipate static charges all must be tested to determine their
dissipative properties both at the time they are manufactured and periodically afterward to detect degradation, caused by wear and contamination, before it results in ESD damage. Two different measurements are needed: surface resistivity and resistance to ground. Both can be made with a Monroe Electronics resistivity meter. Surface resistivity is the quotient of an applied voltage and the resulting current across a probe of a specific configuration on the surface of a planar material being tested. The lower the reading, the greater the dissipative property of the material. The movement of people and equipment across a floor can generate a static charge unless the flooring is made of a conductive material and connected to ground. To test the antistatic effectiveness of flooring, wrist straps, and other materials intended to conduct a static charge to ground, the material's resistance to ground is measured. Readings are expressed in ohms. If a reading is too high, the charge won't be dissipated; if a reading is too low, spark discharges, arcing and/or personnel injury may result. Your resistivity meter choices are above:
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