CANOGA PERKINS 9171 Metro Ethernet Routing Switch - Manual (Page 7)

9171 Installation Guide
Proprietary & Confidential Canoga Perkins Metro Ethernet Routing Switch Page 7 of 26
To ensure switches maintain a long-term stable work, the installation workplace should also meet the
following requirements:
2.1.3 Temperature/Humidity Requirements
To ensure the normal work and service life of switches, certain temperature and humidity should be
maintained inside switch rooms. Longtime higher humidity inside switch rooms may easily lead to poor
insulation or even electric leakage of dielectrics, and sometimes cause material changes in mechanical
features and corrosion of metal parts; if the relative humidity is lower, insulation pads could dry shrink to make
fastening screws loose. Meanwhile, in the dry climate, lower relative humidity could easily cause static
electricity which will impose harms to the circuit of switch; higher temperature would be even more harmful:
longtime high temperature would accelerate aging process of insulation materials to greatly reduce the
reliability of switches and severely affect their service life.
Table 2-1: Temperature/Humidity Requirements
2.1.4 Cleanliness Requirements:
Dust is a big hazard to the safe operation of switches. Indoor dust falling on the switch body can cause
electrostatic adsorption to make poor contact of metal connectors or metal contacts. Especially when the
indoor relative humidity is lower, electrostatic adsorption is easily formed, which will not only affect equipment
service life, but also easily lead to communication failure.
Table 2-2: Dust Content Requirements in Switch Room
Substance Unit Concentration limit
DUST Particle/m3 ≤ 3 X 104 (No visible dust on the tabletop for three days)
Note: The dust particle size is ≥ 5 μm
Besides dust, there are rigorous limits on the content of harmful substances that can accelerate the
corrosion and aging of metals, such as salts, acids, and sulfides in the air in the equipment room, and the
equipment room must be protected against ingression of harmful gases such as SO2, H2S, NH3, and
Item 9171 Series
Temperature 0 ～50 C
Humidity 10% ～95%