QTech QSR-2920 Series User Manual

Installation Manual
7. Appendix 66
www.qtech.ru
Storage Condition
0%–95%/RH, no-condensing
 Measuring points of the working temperature and humidity of QSR-2920
router in the equipment room mean the values measured from the floor
above 1.5 m and 0.4 m from the front of the rack when there are no
protection boards.
 If the humidity in the equipment room is too high for long time, it causes
the poor insulation and even electricity leak of insulation materials easily.
Sometimes, the mechanical performances of materials change and the
metal parts are corroded easily, too.
 If the relative humidity in the equipment room is too low, insulation pads
shrink, which causes the fastened screws loose. Meanwhile, in dry
environment, static electricity appears easily, which harms the circuits on
the router.
3.7.3. Cleanliness Requirements
Dust is harmful for the router operation. Dust causes electrostatic absorption, which makes the
poor contact of metal connectors. Electrostatic absorption appears especially when the
temperature and humidity are lower, which affects the router life and easily causes
communication fault. The requirement for the dust content and particle diameter in the
equipment room is as shown in the following table.
Appendix Table 7.3.1.1-1 Dust requirement for equipment room
Max. diameter
(μm)
0.5
1
3
5
Maximum
density
(tablets/m
3
)
1.4×10
7
7×10
5
2.4×10
5
1.3×10
5
 If there is no visible dust on the desk within three days, it meets the
cleanliness requirement.

QTech QSR-2920 Series Specifications

General

Brand	QTech
Model	QSR-2920 Series
Category	Network Router
Language	English