Laser Safety; Examining The Installation Site; Temperature And Humidity; Cleanliness - H3C WX2540H Installation Manual

Laser safety

WARNING!
Do not stare into any fiber port when the device is powered on. The laser light emitted from the fiber port
might hurt your eyes.
Before you disconnect a fiber connector, execute the shutdown command in interface view to
•
disable the optical source.
• After you remove an optical fiber from the connector, install the dust cover on the connector to avoid
connector 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 as described in
• Lasting high relative humidity can cause poor insulation, electricity creepage, mechanical property
change of materials, and metal corrosion.
Lasting low relative humidity can cause washer contraction and ESD and cause problems including
•
loose screws and circuit failure.
High temperature can accelerate the aging of insulation materials and significantly lower the
•
reliability and lifespan of the device.
Table 1 Temperature/humidity requirements in the equipment room
Temperature
0°C to 40°C (32°F to 104°F)

Cleanliness

Dust buildup on the chassis might 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.
Table 2 Dust concentration limit in the equipment room
Substance
Dust particles
NOTE:
Dust particle diameter ≥ 5 μm
Relative humidity
5% to 95%, noncondensing
Concentration limit (particles/m
≤ 3 x 10
4
(No visible dust on desk in three days)
2
Table 1.
)
3