•Use an uninterrupted power supply (UPS).
•Do not work alone when the router has power.
•Before installation and replacement, make sure the power has been disconnected.
Examining the installation site
The router must be used indoors. To ensure correct operation and long service life of your router, the installation site must meet the following requirements.
Temperature and humidity
You must maintain a compliant temperature and humidity in the equipment room.
•Lasting high relative humidity tends to cause poor insulation, electricity creepage, mechanical property change of materials, and corrosion of metal parts.
•Lasting low relative humidity is likely to result in loose screws due to washer contraction, and even ESD, which causes the circuits to fail.
•A high temperature is the most undesirable condition, because it accelerates the aging of insulation materials and significantly lowers reliability and service life of the router.
For the temperature and humidity requirements for the MSR1000 router, see Table 2.
Table 2 Temperature and humidity requirements
Temperature | Humidity |
0°C to 45°C (32°F to 113°F) | 5% to 90% (noncondensing) |
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Cleanness
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 3 Dust concentration limit in the equipment room
Substance | Concentration limit (particles/m3) | |
Dust particles | ≤ 3 x 104 | |
(No visible dust on desk in three days.) | ||
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NOTE: |
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Dust particle diameter ≥ 5 μm |
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The equipment room must also meet limits on salts, acids, and sulfides to eliminate corrosion and premature aging of components, as shown in Table 4.
Table 4 Harmful gas limits in the equipment room
Gas | Max. (mg/m3) |
SO2 | 0.2 |
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2