Laser Safety; Examining The Installation Site; Temperature And Humidity; Cleanliness - H3C WX2880X Installation Manual

Laser safety

WARNING!
Do not stare into any open apertures of operating transceiver modules or optical fiber connectors.
The laser light emitted from these apertures might hurt your eyes.
CAUTION:
• Before you remove the optical fiber connector from a fiber port, execute the
command in interface view to shut down the port.
• Insert a dust cap into any open optical fiber connector and a dust plug into any open fiber port or
transceiver module port to protect them from contamination and ESD damage.

Examining the installation site

The device can only be used indoors. To ensure correct operation and a long lifespan for your device,
the installation site must meet the requirements in this section.

Temperature and humidity

Maintain the temperature and humidity in the equipment room at acceptable levels.
•
Lasting high relative humidity can cause poor insulation, electricity leakage, mechanical
property change of materials, and metal corrosion.
•
Lasting low relative humidity can cause washer contraction and ESD and bring problems
including loose captive screws and circuit failure.
•
High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the switch.
To ensure correct operation of the device, the equipment room must meet the temperature and
humidity requirements listed in Table1-1.
Table1-1 Temperature/humidity requirements in the equipment room
Item
Temperature
Humidity

Cleanliness

Dust buildup on the chassis can result in electrostatic adsorption, which causes poor contact of metal
components and contact points, especially when indoor relative humidity is low. In the worst case,
electrostatic adsorption can cause communication failure. To ensure correct operation, the
equipment room must meet the dust concentration requirements listed in Table1-2.
Table1-2 Dust concentration limit in the equipment room
Substance
Dust particles
NOTE:
Requirements
0°C to 45°C (32°F to 113°F)
5% RH to 95% RH, noncondensing
Concentration limit (particles/m
≤ 3 x 10 4
(No visible dust on desk in three days)
1-2
shutdown
3
)