Esd Symbol - Alcatel-Lucent 1675 LambdaUnite Installation And System Turn-Up Manual

Safety
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Electrostatic discharge
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.
Figure 1-2 ESD symbol
ESD instructions
Observe the following ESD instructions to avoid damage to electrostatic-sensitive
components:
• Wear working garment made of 100% cotton to avoid electrostatic charging.
• Touch the circuit packs at the edges or the insertion and removal facilities only.
• Ensure that the rack is grounded.
• Wear conductively connected wrist straps and connect them to the rack/subrack ESP
bonding point.
• Work in an area which is protected against electrostatic discharge. Use conducting
floor and bench mats which are conductively connected to the rack/subrack ESP
bonding point.
• Conductively connect all test equipment and trolleys to the rack/subrack ESP bonding
point.
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365-374-198R10.5.4
Issue 1 July 2009
Alcatel-Lucent – Internal
Proprietary – Use pursuant to Company instruction
Specific safety areas
Electrostatic discharge
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