Specifications

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Replacement Preliminaries
4-3
Grounding Methods
The method for grounding must include either a wrist strap or a foot strap at a grounded
workstation. When seated, wear a wrist strap connected to a grounded system. When
standing, use footstraps and a grounded floor mat.
Table 4-2
Static Shielding Protection Levels
Method Voltage
Antistatic plastic 1,500 V
Carbon-loaded plastic 7,500 V
Metallized laminate 15,000 V
Grounding Workstations
To prevent static damage at the workstation, follow these precautions:
■
Cover the workstation with approved static-dissipative material. Provide a wrist
strap connected to the work surface and properly grounded tools and equipment.
■
Use static-dissipative mats, heel straps, or air ionizers to provide added protection.
■
Handle electrostatic sensitive components, parts, and assemblies by the case or
PCB laminate. Handle them only at static-free workstations.
■
Avoid contact with pins, leads, or circuitry.
■
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 conductive materials such as ordinary plastic assembly
aids and plastic foam.
■
Use field service tools, such as cutters, screwdrivers, and vacuums, that are
conductive.
■
Use a portable field service kit with a static-dissipative vinyl pouch that folds out
into 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.