6
1.2.2 Environment requirement
Item
Requirement
Machine hall
space
When many arrays machine cabinets there, make sure 1.2~1.5m
door to door between one cabinet to another, distant the wall at least
0.8m.
Machine hall
floor
Electric Isolation, Dust Free
Volume resistivity of ground anti-static material: 1 10
7
~1 10
10
Grounding current limiting resistance: 1M ;
Floor bearing should be greater than 450Kg/m
2.
Environment
temperature
5~40 C sustainable working, 0~45 C short time working
To install air-conditioning is recommended.
Relative
temperature
20%~80% sustainable working,
10%~90% short time working
Pressure
86~105KPa.
Door & window
Installing rubber strip for sealing door-gaps and dual level glasses for
window.
Wall
It can be covered with wallpaper, or brightness less paint; but do not paint
easy pulverable paint.
Fire protection
Fire alarm system and extinguisher
Power
Requiring device power, air-conditioning power and lighting power are
independent to each other. Device power requires AC power 220V 50Hz.
Please carefully check before running.
1.2.3 System grounding requirement
All function modules’ good grounding designs are the base of reliability and stability of
device. Also, they are the most important guarantee of lightning arresting and
interference rejection. Therefore, system must follow this rule.
Coaxial cable’s outer conductor and isolation layer should keep sound electric
conducting with the metal housing of device.
Grounding conductor must adopt copper conductor in order to reduce high frequency
impedance, and the grounding wire must be as thick and short as possible.
The 2 terminals of grounding wire must make sure for well electric conducting, and
process for antirust.
It is prohibited that users use other devices as part of grounding wire’s electric circuit
The section of the conjunction between grounding wire and device’s frame should be
equal or greater than 25mm
2
.
