HP 1620 Series 시작하기 매뉴얼 - 페이지 6

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The rack or workbench is sturdy enough to support the switch and its accessories.

•

The rack or workbench is reliably grounded.

To ensure correct operation and long service life of your switch, install it in an environment that meets the

requirements described in the following subsections.

Temperature/humidity

Maintain temperature and humidity in the equipment room as described in

specifications."

Lasting high relative humidity can cause poor insulation, electricity creepage, mechanical property

•

change of materials, and metal corrosion.

Lasting low relative humidity can cause washer contraction and ESD and bring problems including

•

loose captive screws and circuit failure.

•

High temperature can accelerate the aging of insulation materials and significantly lower the

reliability and lifespan of the switch.

Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of metal

components and contact points, especially when indoor relative humidity is low. In the worst case,

electrostatic adsorption can cause communication failure.

Table 2 Dust concentration limit in the equipment room

Substance

Dust

NOTE:

Dust diameter ≥ 5 μm

The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion and

premature aging of components, as shown in

Table 3 Harmful gas limits in the equipment room

Gas

All electromagnetic interference (EMI) sources, from outside or inside of the switch and application

system, adversely affect the switch in the following ways:

A conduction pattern of capacitance coupling.

•

Concentration limit (particles/m³)

≤ 3 x 10

(no visible dust on the tabletop over three days)

Table

Maximum concentration (mg/m

0.2

0.006

0.05

0.01

"Environmental

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