Humidity, Temperature, and Cleanness
This section describes the requirements for the humidity, temperature, and cleanness of the equipment room. To ensure the stability and life cycle of the USG and its components, check that the equipment room meets the requirements.
Ensure that there is no explosive, conductive, magnetic, or corrosive dust or debris in the equipment room. Dust that settle on the device may cause electrostatic adsorption, resulting in poor contact of the metal socket connectors and metal contacts. This shortens the life cycle of the device and causes faults.
In addition to dust and debris, toxic gases, such as SO
2, H
2S, and NH
3 must be cleaned out of the equipment room.
Table 1 Requirements for humidity, temperature, and cleanness in the equipment roomItem
|
Description
|
|---|
Cleanness
|
Dust particle
|
Maximum diameter (μm)
|
0.05
|
1
|
3
|
5
|
Maximum density (number of dust particles per cubic meter)
|
1.4 x 107
|
7 x 105
|
2.4 x 105
|
1.3 x 105
|
Noxious gas density
|
Gas
|
SO2
|
H2S
|
CI2
|
HCl
|
HF
|
NH3
|
O3
|
NO2
|
Average (mg/m3)
|
0.3
|
0.1
|
0.1
|
0.1
|
0.01
|
1.0
|
0.05
|
0.5
|
Maximum (mg/m3)
|
1.0
|
0.5
|
0.3
|
0.5
|
0.03
|
3.0
|
0.1
|
1.0
|
Humidity and temperature
|
Temperature
|
Long-term operating temperature
|
- Without hard disk: 0 °C to 45 °C
- With hard disk(s): 5 °C to 40 °C
|
Short-term operating temperature
|
- Without hard disk: -5 °C to 55 °C
- With hard disk(s): 5 °C to 40 °C
|
Operating humidity
|
- Without hard disk: 5% RH to 95% RH, non-condensing
- With hard disk(s): 5% RH to 90% RH, non-condensing
|
Storage humidity
|
- Without hard disk: 5% RH to 95% RH, non-condensing
- With hard disk(s): 5% RH to 90% RH, non-condensing
|
To meet the requirements listed in
Table 1, take the following measures in the equipment room:
- Install a permanent temperature controller regardless of the climate conditions.
- In dry regions, use humidifiers or regularly mop the floor to ensure proper humidity in the equipment room.
- In regions with high humidity, use dehumidifiers.
- Use dust-free materials for the floor, walls, and ceilings.
- Screen exterior doors and windows. The external windows of the equipment room should be sealed for anti-dust purposes.
- Clean the equipment room and air filters on the devices once every three months.
- Wear the ESD uniform, ESD gloves, and ESD shoes before entering the equipment room.
- Locate the equipment room far away from areas with dense corrosive gases, such as chemical plants.
- The air intake vent of the equipment room must not face any pollution source.
- Place batteries in a different room from the devices.
- Invite professionals to measure the temperature, humidity, and other factors periodically.