4
Table 4 Dust concentration limit in the equipment room
Substance Concentration limit (particles/cu m)
Dust particles
3 x 10
4
(No visible dust on desk in three days)
NOTE:
Dust particle diameter 5 m
The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion and
premature aging of components, as shown in Table 5.
Table 5 Harmful gas li
mits in an equipment room
Gas Max. (mg/m
3
)
SO
2
0.2
H
2
S 0.006
NH
3
0.05
Cl
2
0.01
Cooling system
The H3C SR6602 router adopts left to right airflow for heat dissipation.
Figure 3 SR6602 airflow
• Make sure there is enough space (greater than 10 cm (3.94 in)) around the air intake and outlet
vents on the router for good ventilation.
• Make sure the installation site has a good cooling system.
ESD prevention
To prevent electrostatic discharge (ESD), note the following guidelines:
• Make sure that the router and the floor are well grounded.
• Take dust-proof measures for the equipment room.
• Maintain the humidity and temperature at a proper level.
• Always wear an ESD-preventive wrist strap when touching a circuit board or transceiver module.
• Place the removed memory module, CF card, or HIM/MIM on an antistatic workbench, with the
face upward, or put it into an antistatic bag.
