6
Installation preparation checklist
Table 4 Installation preparation checklist
Item Requirements Result
Installation
site
Ventilation
• There is a minimum clearance of 10 cm (3.9 in) around
the inlet and exhaust vents for heat dissipation of the
switch chassis.
• A ventilation system is available at the installation site.
Temperature 0°C to 45°C (32°F to 113°F)
Relative humidity 5% to 95% (noncondensing)
Cleanness
• Dust concentration ≤ 3 × 10
4
particles/m
3
• No dust on desk within three days
ESD prevention
• The equipment and rack are well grounded.
• The equipment room is dust-proof.
• The humidity and temperature are at a proper level.
• Wear an ESD-preventive wrist strap. Make sure the wrist
strap makes good skin contact and is well grounded
when installing FRUs.
• Place the removed interface card on an antistatic
workbench, with the face upward, or put it into an
antistatic bag.
• Touch only the edges instead of electronic components
when observing or moving a removed interface card.
EMI prevention
• Take effective measures to protect the power system from
the power grid system.
• Separate the protection ground of the switch from the
grounding device or lightning protection grounding
device as far as possible.
• Keep the switch far away from radio stations and radar
and high-frequency devices working in high current.
• Use electromagnetic shielding when necessary.
Lightning
protection
• The grounding cable of the chassis is well grounded.
• The grounding terminal of the AC power receptacle is
well grounded.
• A port lightning arrester is installed. (Optional)
Electricity safety
• Equip a UPS.
• In case of emergency during operation, switch off the
external power switch.