ESD GROUNDING
(Bench HWR 014, Instr. Shelf HWR 122,
Personnel Grd HWR 019. )
ESD refers to the OPTIONAL static dissipative laminate used on the bench. The
laminate has a conductive layer that comes in contact with the factory
installed grounding bolts in the worksurface. The ESD grounding kit, including
the 10 ft. grounding wire must be attached and the bench must be properly
grounded to your facility earth ground. (See below for grounding cautions!)
The eyelet slips over the bolt end and the alligator clip attaches to ground.
When tested with a megohmmeter the ground bolts should measure 1 (1x10
6
) to
1000 (1x10
9
) in accordance with EOS/ESD standards prescribed in EOS/ESD
document S4.1-1990 Worksurfaces-Resistive Characterization. For specific
details on grounding the bench consult EOS/ESD document S6.1-1991 Grounding
- Recommended Practice.
GROUNDING CAUTIONS
:
1. ) Ground each bench individually to ground, NEVER to each other in a
continuous daisy chain.
2.) ISOLATED ground receptacles should not be used to derive an ESD
ground.
3.) The green wire in a standard wall duplex can be used if it has been
absolutely determined that the green wire is attached to earth ground
in your facility, thereby providing a real earth ground.
4.) Each component of an ESD station should be connected to the same
common ground point. In other words, use only ONE of the ground bolts
as a path to ground. There are 2 installed for convenience only, or in
the event you purchase a continuous resistance monitor.
5. ) DON'T use power tools to install the nuts for the grounding kit.
HAND TIGHTEN ONLY. If you attempt to 'spin' the ground bolt, the
serrated teeth under the head of the bolt might strip the thin
conductive layer
10
