Hi Steve,

ANSI/ESD S541-2008 defines dissipative as 10^4 to 10^11 ohms. With your floor resistance, the mat, and your technician's foot strap all in series I would say you may have too much resistance rather than not enough.

I suggest you put the mat on the floor and use the same meter you use to measure the floor resistance to measure the combined mat and floor resistance. If it is too high, you may need to ground the mat and repeat the test.

Best regards,
Raye Rivera
Quality Manager
[Spirent]<http://www.spirent.com/>
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On Fri, 17 Aug 2018 at 21:32, Vargas, Stephen M <[log in to unmask]<mailto:[log in to unmask]>>

wrote:



> All:

>

>       A quick ESD question. We would like to use 3'x4' static

> dissipated anti-fatigue mats at our SMT lines. The floor under these

> mats are coated with ESD wax and verified regularly. The question is

> whether the mats need to be grounded with a 1 megohm resistor or will

> the static charge dissipate naturally through the mat into the floor?

> Wiring is an option, but the wires tend to get damaged frequently through normal operator movement.

> Thanks in advance.

>

> Regards,

> Steve Vargas