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Method Voltage
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Antistatic plastic 1,500 V
Carbon-loaded plastic 7,500 V
Metallized laminate 15,000 V
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4.1.5 Grounding Workstations
To prevent static damage at the workstation, use the following
precautions:
o Cover the workstation with approved static-dissipative material. Provide
a wrist strap connected to the work surface and properly grounded tools
and equipment.
o Use static-dissipative mats, foot straps, or air ionizers to give added
protection.
o Handle electrostatic sensitive components, parts, and assemblies by the
case or PCM laminate. Handle them only at static-free workstations.
o Avoid contact with pins, leads, or circuitry.
o Turn off power and input signals before inserting and removing
connectors or test equipment.
o Use fixtures made of static-safe materials when fixtures must directly
contact dissipative surfaces.
o Keep work area free of nonconductive materials such as ordinary plastic
assembly aids and Styrofoam.
o Use field service tools, such as cutters, screwdrivers, and vacuums,
that are conductive.
o Use a portable field service kit with a static-dissipative vinyl pouch
that unfolds to become a work mat. Also, use a wrist strap and a ground
cord for the work surface. Ground the cord to the chassis of the
equipment undergoing test or repair.
4.1.6 Grounding Equipment
Use the following equipment to prevent static electricity damage to
equipment:
Wrist Straps are flexible straps with a minimum of one megohm +/- 10%
resistance in the ground cords. To provide proper ground, a strap must be
worn snug against the skin. On grounded mats with more banana-plug
connectors, connect a wrist strap with alligator clips.
Heelstraps/Toestraps/Bootstraps can be used at standing workstations and
are compatible with most types of shoes or boots. On conductive floors or
dissipative floor mats, use them on both feet with a minimum of one-megohm
resistance between the operator and ground. To be effective, the