6
Altitude
To ensure correct operation of the device, make sure the room altitude meets the requirements as
described in
Table1-6 Altitude requirements
Item
Description
Operating altitude
–60 m to +3000 m (–196.85 ft to +9842.52 ft)
The allowed maximum temperature decreases by 0.33°C (32.59°F) as the
altitude increases by 100 m (328.08 ft) from 900 m (2952.76 ft)
Storage altitude
–60 m to +5000 m (–196.85 ft to +16404.20 ft)
ESD prevention
To prevent electrostatic discharge (ESD), follow these guidelines:
•
Make sure the rack is reliably grounded.
•
Take dust-proof measures for the equipment room.
•
Maintain the humidity and temperature in the equipment room at acceptable levels.
•
When working with the device, always wear an ESD wrist strap and ESD garment. Make sure
the wrist strap makes good skin contact and is reliably grounded.
•
Use foldable antistatic mat and portable repair kit.
EMI
All electromagnetic interference (EMI) sources, from outside or inside of the device and application
system, adversely affect the device in the following ways:
•
A conduction pattern of capacitance coupling.
•
Inductance coupling.
•
Electromagnetic wave radiation.
•
Common impedance (including the grounding system) coupling.
To prevent EMI, use the following guidelines:
•
Take effective measures to filter interference from the power grid.
•
Keep the device far away from radio transmitting stations, radar stations, and high-frequency
devices.
•
Use electromagnetic shielding, for example, shielded interface cables, when necessary.
•
To prevent signal ports from getting damaged by overvoltage or overcurrent caused by lightning
strikes, route interface cables only indoors.
Lightning protection
To enhance lightning protection for the device, follow these guidelines:
•
Make sure the AC power outlet is reliably grounded.
•
Install a surge protected power strip at the power input end.
