363-206-285 Trouble Clearing: TAD-100
Issue 2, February 2000 Page 3 of 4
DDM-2000 OC-3 MULTIPLEXER
Electrostatic Discharge (ESD) Considerations
Any integrated circuit on a circuit pack can be damaged by static electricity that builds
up within a work area, particularly in areas with low relative humidity. This static
buildup on work surfaces and on personnel and their clothing is produced by the
various charging effects of even simple movements and by contact between various
objects.
As a rule, the greatest potential for electrostatic damage occurs in areas with the
lowest relative humidity. But, because such damage can occur anywhere, all
personnel handling circuit packs should take the following precautions:
1. Since materials such as food wrappers, plastics, and Styrofoam containers
tend to generate static electricity, keep them away from all circuit packs.
2. Be sure to read all warning labels on bags and cartons before opening any
packaging.
3. If possible, open all circuit packs at a static-safe work position using properly
grounded wrist straps and table mats that can dissipate static electricity.
4. Whenever possible, wait to remove circuit packs from their protective antistatic
packaging until it is time to insert them into a bay.
5. Never touch a circuit pack’s components, conductors, or connector pins.
Handle all circuit packs only by the faceplate or latch or by the top and bottom
outermost edges.
6. When opening and handling circuit packs or when working on backplanes,
always wear a grounded wrist strap or wear a heel strap and stand on a
grounded floor mat that can dissipate static electricity.
7. Always store and transport circuit packs in static-safe packages. (Shielding is
not required unless specified.)
8. Whenever you remove circuit packs from a shelf, immediately put them into
static-safe packages.
9. Try to keep relative humidity above 20 percent.
10. DDM-2000 shelves are equipped with grounding jacks for connecting static
ground wrist straps. The jacks are located on the bottoms of the user panels.
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