HP Compaq nc6220 Maintenance And Service Manual page 79

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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
foot straps 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:
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Antistatic tape
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Antistatic smocks, aprons, and sleeve protectors
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Conductive bins and other assembly or soldering aids
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Nonconductive foam
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Conductive tabletop workstations with ground cords of
one megohm resistance
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Static-dissipative tables or floor mats with hard ties to
the ground
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Field service kits
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Static awareness labels
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Material-handling packages
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Nonconductive plastic bags, tubes, or boxes
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Metal tote boxes
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Electrostatic voltage levels and protective materials
Maintenance and Service Guide
Removal and Replacement Preliminaries
4–7