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xl Issue 8.0 July 2002
â– Always store and transport circuit packs in static-safe packaging. Shielding
is not required unless specified.
â– Keep all static-generating materials such as food wrappers, plastics, and
styrofoam
* containers away from all circuit packs. When removing circuit
packs from a bay, immediately place the circuit packs in static-safe
packages.
â– Whenever possible, maintain relative humidity above 20 percent.
â– Always keep the electromagnetic interference (EMI)/ESD protective front
covers on the shelves except during an upgrade or maintenance
procedure. Once a circuit pack is replaced in the shelf, immediately close
the front cover.
To reduce the possibility of ESD damage, shelves are equipped with grounding
jacks to enable personnel to ground themselves using wrist straps (Figure 3),
while handling circuit packs or working on a shelf. The jacks for connection of
wrist straps are located at the lower right-hand corner of each user panel and filter
panel and at the rear of the bay. These jacks are labeled. The wrist straps should
be checked periodically with a wrist strap tester to ensure that they are working
properly.
Figure 3. Static Control Wrist Strap
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