H3C Technologies H3C MSR 930 - Manual (Page 9)

2
Gas Max. (mg/m 3 )
NH
3
0.05
Cl
2
0.01
To prevent overheating:
• Provide adequate clearance for air flow, including at least 10 cm (3.94 in) ventilation space
around the router's air intake and outlet vents.
• Make sure the site has an adequate cooling system.
ESD prevention
To prevent the electronic components from being damaged by ESD, follow these guidelines:
• The equipment and floor are properly grounded.
• The equipment room is dust-controlled.
• Wear an ESD-preventive wrist strap when inspecting or handling a circuit board.
To attach an ESD-preventive wrist strap:
1. Wear the wrist strap on your wrist.
No wrist strap is supplied with the router. Prepare it yourself.
2. Lock the wrist strap tight around your wrist to keep good contact with the skin.
3. Insert the ESD-preventive plug into the ESD-preventive socket in the chassis.
4. Attach the alligator to the chassis.
IMPORTANT:
Check the resistance of the ESD-preventive wrist strap for safety. The resistance reading should be in
the range of 1 to 10 megohm (Mohm) between human body and the ground.
EMI
EMI from any source adversely affects the router.
To prevent EMI:
• Use electromagnetic shielding when necessary.
• Take measures against interference from the power grid.
• Position the router as far as possible from any power source's grounding equipment or light-
prevention equipment.
• Position the router as far as possible from radio transmitters, radar, and all high-voltage or high-
frequency equipment.
Lightning protection
To protect the router from lightning:
• Make sure the grounding cable of the chassis is grounded properly.
• Make sure the grounding terminal of the AC power receptacle is grounded properly.
• Install a lightning arrester at the input end of the power supply.