In an environment with low relative humidity, however, the insulating strip may dry and shrink. Static electricity may
occur easily and endanger the circuit on the equipment.
In an environment with high temperature, the equipment is subject to even greater harm, as its performance may
degrade significantly and various hardware faults may occur. .
Therefore, the ambient temperature and humidity of the RG-S2900G-E must meet the requirements listed in Table 2-1:
Table 2-1 Temperature and Humidity Requirements of the RG-S2900G-E Series
Temperature
Relative Humidity
0ºC to 50ºC
10% RH to 90% RH
The requirements for the sampling site of the temperature and humidity in the operating environment of the device
are as follows:
There is no protective plate at the front or back of the equipment rack.
The vertical height is 1.5 m above the floor.
The distance from the front panel of the equipment is 0.4 m.
2.2.3 Cleanness Requirements
Dust poses a severe threat to the running of the equipment. The indoor dust falling on the equipment may be adhered by
the static electricity, causing bad contact of the metallic joint. Such electrostatic adherence may occur more easily when
the relative humidity is low, not only affecting the useful life of the equipment, but also causing communication faults.
Table 2-2 shows the requirements for the dust content and granularity in the equipment room.
Table 2-2 Requirements for the Dust Content and Granularity in the Equipment Room
Substance
Concentration Limit (particles/m
3
)
Dust particles (diameter
≥
0.5
μ
m)
≤
3.5
×
10
6
Dust particles (diameter
≥
5
μ
m)
≤
3
×
10
4
Apart from dust, the salt, acid and sulfide in the air in the equipment room must also meet strict requirements; as such
poisonous substances may accelerate the corrosion of the metal and the aging of some parts. The equipment room
should be protected from the intrusion of harmful gases (for example, SO
2
, H
2
S, NO
2
and Cl
2
), whose requirements are
listed in the following table.
Table 2-3 Requirements for Harmful Gases in the Equipment Room
Gas
Average (mg/m
3
)
Maximum (mg/m
3
)
SO
2
0.3
1.0
H
2
S
0.1
0.5
NO
2
0.5
1.
0
Cl
2
0.1
0.3
