Lightning Protection; Temperature; Humidity - H3C SecPath M9000-AI-E8 Installation Manual

Lightning protection

To protect the gateway from the lightning, make sure the following requirements are met:
•
The grounding cable for the chassis is correctly grounded.
•
The grounding terminal of the AC power receptacle is correctly grounded.
•
If an AC power cord is routed from outdoors for connecting to the device, connect the power
cord first to a power lightning arrester before connecting it to the power receptacle on the
device.
•
If a network cable is routed from outdoors for connecting to the device, connect the network
cable first to a network port lightning arrester before connecting it to the port.
IMPORTANT:
• No network port lightning arrester or AC power lightning arrester is provided with the device.
Purchase them as required.
• For the technical specifications and installation instructions for the lightning arresters, see the
documents shipped with them.

Temperature

CAUTION:
If condensation appears on the chassis when you move it to a high-temperature environment, dry
the chassis before powering it on to avoid short circuits.
If the temperature in the equipment room is too high, too low, or changes dramatically, the device
reliability is reduced and its service lifetime is shortened.
High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the gateway.
To ensure the correct operation of the gateway, make sure the room temperature meets the
requirements in
Table 2 Temperature requirements
Temperature
Operating temperature
Storage temperature

Humidity

Maintain appropriate humidity in your equipment room, as described in
•
Lasting high relative humidity tends to cause poor insulation, electricity leakage, mechanical
property change of materials, and corrosion of metal parts.
•
Lasting low relative humidity is likely to result in loose screws due to washer contraction, and
even electrostatic discharge (ESD), which causes the circuits to fail.
Table 3 Humidity requirements
Humidity
Operating humidity
Table 2.
Range
0°C to 45°C (32°F to 113°F)
–40°C to +70°C (–40°F to +158°F)
Range
5% RH to 95% RH, noncondensing
5
Table 3.