Alcatel-Lucent 1643 AMS Installation Manual page 41

Safety
Electrostatic discharge
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Introduction
Electrostatic discharge (ESD), caused by touching with the hand for example, can
destroy semiconductor components. The correct operation of the complete system is
then no longer assured.
Industry experience has shown that all semiconductor components can be damaged by
static electricity that builds up on work surfaces and personnel. The electrostatic
discharge can also affect the components indirectly via contacts or conductor tracks.
The electrostatic charges are produced by various charging effects of movement and
contact with other objects. Dry air allows greater static charges to accumulate. Higher
potentials are measured in areas with low relative humidity, but potentials high enough
to cause damage can occur anywhere.
The barred-hand symbol
Circuit packs containing components that are especially sensitive to electrostatic
discharge are identified by warning labels bearing the barred-hand symbol.
ESD instructions
The following ESD instructions must be observed when handling option cards and/or
SFPs:
• Wear working garment made of 100% cotton to avoid electrostatic charging.
• Touch the option cards/SFPs at the edges only.
• Ensure that the 1642 AM and 1643 AMS units are grounded.
• Wear conductively connected wrist straps and connect them to an ESP bonding
point.
• Work in an area which is protected against electrostatic discharge. Use conducting
floor and bench mats which are conductively connected to an ESP bonding point.
• Conductively connect all test equipment and trolleys to an ESP bonding point.
• Store and ship the option cards/SFPs in their shipping packing. The option
cards/SFPs must be packed and unpacked only at workplaces suitably protected
against build-up of charge.
• Whenever possible, maintain the relative humidity of air above 20%.
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365-312-802R7.2
Issue 4, June 2007
Alcatel-Lucent - Proprietary
See notice on first page
1-15