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Statfree T2™ Dual Layer MSDS
Static Control, ESD, Clean Room Products
TB-2000 March 2012 Page 1 of 4
The purpose of an ESD worksurface is to aid in the prevention
of damage to ESD sensitive components and assemblies from
electrostatic discharge. An ESD worksurface provides protection in
1. Providing an antistatic worksurface area that will limit static
2. Removing the charge from a conductive object placed on the
A dissipative worksurface having a surface resistance of at
least 1 x 10E6, but less than 1 x 10E9 ohms is recommended
by worksurface standard ANSI/ESD S4.1. Dissipative materials
minimize the generation of static charges, and will dissipate a
charge slow enough so that a spark will not occur. Dissipative
materials are usually the preferred choice for bench top
Conductive materials are the quickest to remove a charge,
but they can also cause damage by discharging too rapidly.
Conductive materials are usually used as floor mats, which is
defined by ANSI/ESD S7.1 as less than 1 x 10E6 ohms.
1. ANSI/ESD S20.20 requires that all conductors in an ESD
protected area, including personnel, must be grounded.
2. The ESD ground must be tied directly to and at the same
potential as the building or “green wire” equipment ground.
3. Per ANSI/ESD S20.20, the ESD control program can in no
way replace or supercede any requirements for personnel
safety. Ground fault circuit interrupters (GFCI) and other safety
protection should be considered wherever personnel might
come into contact with electrical sources.
4. All electrical outlets should be verified for proper wiring
configuration, resistance or impedance and GFCI function when
the mat is installed and periodically thereafter.
A common point ground is defined by the grounding standard
1. A grounded device where two or more conductors are bonded.
2. A system or method for connecting two or more grounding
conductors to the same electrical potential.
Examples of common point grounds with ground cords are
Figure 2. Other ground cords.
Figure 3. 09814 with screw allows ground cord to be bolted to mat
to keep cord from disconnecting.
Common point grounds are designed to provide ground for
worksurface mats, wrist straps, and other items.
NOTE: DO NOT DAISY CHAIN. Because of the high resistances
inherent to many types of protective surfaces, daisy chaining of
these materials can severely limit their ability to properly dissipate
and protect against static charges.
DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Web Site: Desco.com
United States of America
© 2012 DESCO INDUSTRIES INC.
Figure 1. Typical common point grounds.
Per ANSI/ESD S6.1, Grounding section 4.1.1 “Every element to be
grounded at an ESD protected station shall be connected to the
same common point ground.”
ESD Handbook ESD TR20.20 section 5.1.3 Basic Grounding
Requirements “The first step in ensuring that everything in an
EPA is at the same electrical potential is to ground all conductive
components of the work area (worksurfaces, people, equipment,
etc.) to the same electrical ground point. This point is called the
common point ground. The next step in completing the ground
circuit is to connect the common point ground to the equipment
ground (third wire, green).”
Figure 4. ESD mats should never be grounded in series, that is
66122 Achoimre na n-ábhar
TB-2000 March 2012 Page 1 of 4 I n s t a l l a t i o n a n d M a i n t e n a n c e o f E S D M a t s Introduction The purpose of an ESD worksurface is to aid in the prevention of damage to ESD sensitive components and assemblies from electrostatic discharge. An ESD worksurface provides protection in the following two ways: 1. Providing an antistatic worksurface area that will limit static electricity generation. 2. Removing the charge from a conductive object placed on the worksurface. A dissipative worksurface having a surface resistance of at least 1 x 10E6, but less than 1 x 10E9 ohms is r
TB-2000 Page 2 of 4 Grounding Methods Method 1 (Grounding via ground cords) 1. Desco recommends using a common point ground cord when grounding via ground cords. Most common point ground cords will ground your ESD worksurface and provide banana jack ground points for two wrist straps. 2. A common point ground should be installed at each workstation and should be connected directly to a verified “green wire” equipment ground. Only one groundable point should exist on a worksurface. Figure 5. Common point ground for each workstation. 3. Wrist straps should never be grounded through a worksu
TB-2000 Page 3 of 4 Figure 9. Installing push and clinch mat grounding snap. 4. The third type is the ri vet style mat grounding snap. This type of snap assembly is installe d using a riv etting hand to ol, ite m # 09867 . Male snap studs and ri vets are available as item # 09856 and fe male snap sockets and rivets are availab le as item # 09857 . Ground able point labels are not includ ed with either the it em # 09856 or # 09857 snap kits. Selection of Common Point and Floor Mat Grounding Systems 1. Determine the type of common point grounding system you will use: barrier strip, bus bar, gro
TB-2000 Page 4 of 4 Figure 14. Hooking up ground cords. 4. If your installation includes a floor mat, you should duplicate step 2 and attach the floor mat ground to the same point as the worksurface ground wire. 5. Measure the resistance from the ground snap on the mat to the common ground point. It should read 1 megohm ± 20 percent if you are using a ground cord with a resistor, and less than 1 ohm if you are using a non-resistor ground cord. 6. Using a surface resistance tester per ESD TR53, test the resistance to ground from the center of the mat surface. Required equipment: a megohmmeter
páirteanna gaolmhara do 66122
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