Laser Safety; Examining The Installation Site; Temperature And Humidity; Cleanness - H3C WX5540E Installation Manual

Always check that the power has been disconnected when you perform operations that require the
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device to be powered off.

Laser safety

WARNING!
Do not stare into any fiber port when the device is powered on. The laser light emitted from
the optical fiber might hurt your eyes.
• Before you disconnect the fiber connector, execute the shutdown command in interface view to
disable the optical source.
Install the dust covers to the optical fiber connector to avoid connector damage.
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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 appropriate temperature and humidity in the equipment room.
Continuous high relative humidity can cause poor insulation, electricity creepage, and metal
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corrosion and can change the mechanical property of materials.
• Continuous low relative humidity can cause washer contraction and ESD and introduce problems
such as loose captive screws and circuit failure.
High temperature can accelerate the aging of insulation materials and significantly lower the
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reliability and lifespan of the device.
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 45°C (32°F to 113°F)

Cleanness

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
Table 1.
Relative humidity
5% to 95%, noncondensing
Table 2.
2