Installation Preparations; Requirements On Environment; Requirements On Temperature/Humidity; Requirements On Cleanness - 3Com MSR 50-40 ROUTER. Installation Manual

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Installation Preparations

Requirements on Environment

MSR 50 Series must be used indoors. To ensure the normal operation and prolong their service life, the
following requirements for installation site must be met.

Requirements on Temperature/Humidity

To ensure the normal operation and prolong their service life, certain requirements on temperature and
humidity in the equipment room shall be met. If the relative humidity is too high, the insulation materials
in it will deteriorate easily or even lead to electric leakage. Sometimes this will result in change to the
mechanical performance of the materials and rusting of the metal components. If the relative humidity is
too low, the fastening screw will become loosen due to shrinkage of the isolation spacer. In an
environment with dry climate, static electricity may be produced, putting the CMOS of the router to risk.
High temperature is of the greatest risk: for it will significantly degrade the router's reliability, speed up
aging process of the insulating materials, and shorten the service life of the router.
The requirements on the temperature and humidity for MSR 50 Series are shown in the following table:
Table 2-1 Temperature/humidity requirements in the equipment room
0°C to 40°C (32°F to 104°F)

Requirements on Cleanness

Dust is harmful to the safe operation of the Router. Dust on the chassis may result in static absorption,
thus causing poor contact of the metal connection components or points. Especially under the condition
of low indoor humidity, dust is easier to be absorbed.
The requirements on the dust concentration and diameter are shown in the following table:
Table 2-2 Limitation on dust content in equipment room
Diameter (μm)
Concentration
(particle/m³)
Temperature
0.5
1.4 × 107
Relative humidity (noncondensing)
5% to 90%
1
7 × 105 2.4 × 105
2-1
3 5
1.3 × 105