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4–6 Maintenance and Service Guide
Removal and Replacement Preliminaries
4.7 Grounding Equipment and Methods
Grounding equipment 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. Wrist straps are flexible straps with a minimum of
one megohm ±10% resistance in the ground cords. To
provide proper ground, wear a strap snug against the skin at
all times. On grounded mats with banana-plug connectors,
connect a wrist strap with alligator clips.
■
When standing, use foot straps and a grounded floor mat.
Foot straps (heel, toe, or 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 minimum of one-megohm resistance
between the operator and ground. To be effective, the
conductive strips must be worn in contact with the skin.
■
Other grounding equipment recommended for use in
preventing electrostatic damage includes:
❏
Antistatic tape
❏
Antistatic smocks, aprons, or sleeve protectors
❏
Conductive bins and other assembly or soldering aids
❏
Non-conductive foam
❏
Conductive tabletop workstations with ground cord of
one-megohm resistance
❏
Static-dissipative table or floor mats with hard tie to
ground
❏
Field service kits
❏
Static awareness labels
❏
Material-handling packages
238850-003.book Page 6 Friday, December 21, 2001 2:53 PM