How often to measure the resistance of anti-static countertops and anti-static floors mat
If it is a new anti-static countertop and floor, it is recommended to test it every six months; if the frequency of use is high and the service life is more than two years, it is recommended to test it every quarter; the resistance range is controlled at 10^6~10^9Ω.
EIA-625 Table 2 Required ESD Protection Items Inspection, which lists quarterly inspection items: ESD Protected Static Dissipative Work Surface to ESD Ground Resistance RTG (Resistance to Ground), ESD Protected Floor RTT (Surface Resistance).
However, according to ANSI/ESD S20.20 paragraph 6.1.3.2, end users must determine and document in their ESD control plan how often to perform inspections, based on "The frequency of verification inspections shall be based on the use of the control item, its durability and associated risk of failure."