Ruijie RG-PF2920-DPBOX-P Series Hardware Installation And Reference Manual page 12

Hardware Installation and Reference Guide
performance and reliability of the switch while severely impacting its service life.
Table 2-1 Ambient Temperature and Humidity Requirements of the RG-PF2920-DPBOX-P
Operating Temperature
0° C to 45° C (32° F to 113° F) (rack deployment)
0° C to 40° C (32° F to 104° F) (desktop/ELV box
deployment)
2.2.3 Cleanliness
Dust poses a major threat to the device. The indoor dust takes on a positive or negative static electric charge
when falling on the switch, causing poor contact of the metallic joint. Such electrostatic adhesion may occur
more easily when the relative humidity is low, affecting the service life of the switch and causing communication
faults.
Table 2-2 Requirements for the Dust Content and Granularity in the Equipment Room
Dust
Dust particles (diameter ≥ 0.5 μm)
Dust particles (diameter ≥ 5 μm)
Apart from dust, the salt, acid, and sulfide in the air of the equipment room must meet strict requirements.
These harmful substances will accelerate metal corrosion and component aging. Therefore, the equipment
room should be properly protected against the intrusion of harmful gases, such as sulfur dioxide, hydrogen
sulfide, nitrogen dioxide, and chlorine gas.
Table 2-3 Limit Values for Harmful Gases
Gas
Sulfur dioxide (SO2)
Hydrogen sulfide (H2S)
Nitrogen dioxide (NO2)
Chlorine (CI2)
Note
The average value refers to the average value of harmful gases measured in one week. The maximum value
is the upper limit of the harmful gas measured in one week for up to 30 minutes every day.
Relative Humidity
10% to 90% RH (non-condensing)
Unit
3
Particles/m
3
Particles/m
3
Average (mg/m )
0.3
0.1
0.5
0.1
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Preparing for Installation
Maximum Quantity
6
3.5 x 10
4
3 x 10
3
Maximum (mg/m )
1.0
0.5
1.0
0.3