Sagem 4450E - Manual (Page 48)

CHAPTER 4
3P@C Installation Manual
Page 3-1 Reproduction and communication in any form prohibited without the written permission of SAGEM SA
3. Installation Preparation
3.1. 3.1. 3.1. 3.1. Environmental Requirements
3.1.1. 3.1.1. 3.1.1. 3.1.1. Temperature and Humidity Requirements
To ensure the normal running of the equipment and prolong its service life, please make sure that
the temperature and humidity of the equipment room are within the allowed range of the equipment
operation.
The temperate shall range within -5°C ~ +50°C and the indoor temperature range of 18°C ~ 25°C is
recommended. Too high temperature will do great harm to the equipment and long-term high
temperature will accelerate the ageing of insulation materials, reduce the running stability of
components and even affect the service life of the equipment.
The humidity range shall range from 5% to 95%, preferably 20% ~ 60%. Too high humidity inside
the equipment room may cause poor insulation performance of the insulation materials or even
current leakage, which will cause short circuit or fire disaster. In addition, too high humidity will also
cause changes of the mechanical performance of the materials, oxidization of the metal part and
corrosion. However, too low humidity will cause the generation of static electricity.
3.1.2. 3.1.2. 3.1.2. 3.1.2. Cleanness Requirements
Certain cleanness is required for the operating environment of the equipment and dust should be
avoided as much as possible, because dust will cause harm to the safe running of the equipment.
When dust falls down on the equipment body, it can cause static absorption and result in poor
contact of the metal plug-ins or metal contact points, especially when the indoor RH is slightly
lower. This will not only affect the service life of the equipment but also cause communication
failure. Furthermore, the dust falling down on the optical interface of an interface module installed
in the equipment will severely affect the interface data transmission or even cause transmission
interruption. Therefore, dustproof measures must be taken for the equipment room where the
equipment operates. It is recommended that the concentration of particles be less than 180 mg/ m
3
and such devices as printers and copying machines be place as far as possible from the
equipment, so as to prevent paper scraps and ink powder from being absorbed into the equipment
inside.
3.1.3. 3.1.3. 3.1.3. 3.1.3. Floor Requirements
The equipment room floor shall first of all satisfy the bearing capacity requirement and it should be
dust proof, fire proof, insulated and wearproof. The floor can be made of linoleum flooring, ethylene
perchloride, resinous vanish or can be the anti-static raised floor. The antistatic floorboards should
be tightly fit and robust, with the horizontal error no greater than 2mm per square meter. The
ground or floor must be statically grounded and the resistance of the unit raised floorboards should
accord with the
Technical Specification for the Raised Floor in Computer Rooms . The floor can be
connected to the grounding device via a current-limiting resistor and connection line.