4Table 4 Dust concentration limit in the equipment roomSubstance Concentration limit (particles/cu m)Dust particles ≤ 3 x 104(No visible dust on desk in three days)NOTE:Dust particle diameter ≥ 5 μmThe equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion andpremature aging of components, as shown in Table 5.Table 5 Harmful gas limits in an equipment roomGas Max. (mg/m 3 )SO2 0.2H2 S 0.006NH3 0.05Cl2 0.01Cooling systemThe 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 outletvents on the router for good ventilation.• Make sure the installation site has a good cooling system.ESD preventionTo 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 theface upward, or put it into an antistatic bag.
