Personal Grounding Methods and Equipment

Use the following equipment to prevent static electricity damage to equipment:

Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground cords. To provide a proper ground, wear the strap against bare skin. The ground cord must be connected and fit snugly into the banana plug connector on the grounding mat or workstation.

Heel straps, toe straps, and boot straps 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 maximum of one-megohm ± 10% resistance between the operator and ground.

Table 4-17Static Shielding Protection Levels

Method

Voltage

 

 

Antistatic plastic

1,500

Carbon-loaded plastic

7,500

Metallized laminate

15,000

 

 

Grounding the Work Area

To prevent static damage at the work area:

Cover the work surface with approved static-dissipative material. Provide a wrist strap connected to the work surface and 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 work area free of nonconductive materials, such as ordinary plastic assembly aids and Styrofoam.

Use field service tools, such as cutters, screwdrivers, and vacuums, that are conductive.

Recommended Materials and Equipment

Materials and equipment that are recommended for use in preventing static electricity include:

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 one-megohm ± 10% resistance

Static-dissipative table or floor mats with hard tie to ground

Field service kits

Static awareness labels

Wrist straps and footwear straps providing one-megohm ± 10% resistance

Material handling packages

Conductive plastic bags

76 Removal and Replacement Procedures

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HP xw9300 manual Personal Grounding Methods and Equipment, Grounding the Work Area, Recommended Materials and Equipment