Laser Safety; Examining The Installation Site; Temperature And Humidity; Cleanliness - H3C WX2540E 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 normal 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 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 switch.
To ensure correct operation of the device, the equipment room must meet the temperature and humidity
requirements listed in
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 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.
Table 1.
Relative humidity
5% to 95%, noncondensing
2