H3C S7502 Ethernet Switch Installation Manual

Installation Manual
H3C S7502 Ethernet Switch Chapter 3 Installation Preparations
3-3
3.1.5 Laser Safety
Some LPU of the S7502 has optical ports. In operating status, it is prohibited to stare
into the open optical port because the laser emitted from it has very high power density
and is harmful to your retina.
Caution:
Staring at the laser beam inside the fiber could hurt your eyes.
3.2 Examining Installation Site
The S7502 can only be used indoors. To ensure that the switch works normally and
expand its service life, the installation environment shall meet the requirements
described in the coming sections.
3.2.1 Temperature/Humidity Requirements
To ensure the normal operation and service life of a switch, a certain level of
temperature and humidity should be maintained in the equipment room. If the humidity
in the equipment room is too high and for a long time, it may go bad insulated or even
power leakage may occur. Sometimes, high humidity may result in material mechanical
performance changing or metal parts rusted. If the relative humidity is too low, the
captive screws may become loose due to the shrinkage of the insulation washers.
Meanwhile, the electrostatic is likely to be produced in the dry environment, which will
jeopardize the CMOS circuit of the switch. The higher the temperature, the greater the
damage it will do on the switch. High temperature for a long time will speed up the aging
process of the insulation materials, greatly lower the reliability of the switch and
therefore affect its service life seriously.
Table 3-1 Temperature/humidity requirements
Specification Range
Operating temperature 0°C to 45°C (32°F to 113 °F)
Relative humidity (noncondensing) 10% to 90%
3.2.2 Cleanness Requirements
Dust does serious harm to the normal operation of the switch. The indoor dust
accumulated on the chassis can cause electrostatic adsorption, resulting in poor