● Wrist straps are flexible straps with a maximum of 1 MΩ ±10% resistance in the ground cords. To
provide proper ground, a strap must be worn snug against bare skin. The ground cord must be
connected and fit snugly into the banana plug connector on the grounding mat or workstation.
● You can use heel straps, toe straps, and boot straps at standing workstations. These straps are
compatible with most types of shoes or boots. On conductive floors or dissipative floor mats, use
them on both feet with a maximum of 1 MΩ ±10% resistance between the operator and ground.
Table 4-2 Static shielding protection levels
Static shielding protection levels
Method Voltage
Antistatic plastic
Carbon-loaded plastic
Metallized laminate
1,500
7,500
15,000
Grounding the work area
To prevent static damage at the work area, follow these precautions:
● Cover the work surface with approved static-dissipative material.
● Use a wrist strap connected to a properly grounded work surface and use properly grounded tools
and equipment.
● Use static-dissipative mats, foot straps, or air ionizers to give added protection.
● Handle electrostatic sensitive components, parts, and assemblies by the case or PCB laminate.
Handle them only at static-free work areas.
● Turn off power and input signals before inserting and removing connectors or test equipment.
● Use fixtures made of static-safe materials when fixtures must directly contact dissipative surfaces.
● Keep the work area free of nonconductive materials, such as ordinary plastic assembly aids and
polystyrene foam.
● Use conductive field service tools, such as cutters, screwdrivers, and vacuums.
● Avoid contact with pins, leads, or circuitry.
Recommended materials and equipment
HP recommends certain materials and equipment to prevent static electricity:
● Antistatic tape
● Antistatic smocks, aprons, or sleeve protectors
● Conductive bins and other assembly or soldering aids
● Conductive foam
● Conductive tabletop workstations with ground cord of 1 MΩ ±10% resistance
● Static-dissipative table or floor mats with hard tie to ground
Grounding the work area
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