2
7
AD
INSTRUMENTS
2.2.3
Environment Requirement
Item
Req u
irement
Machine
hal
W hen user i n stall machi ne frame a r ra y in one
machine hall , the distance betwe en 2 ro w of ma
chi ne frames should be 1.2
—
1.5 m
Machine hall
floo r
Electric Isolation, Dust Free
Volume resistively of ground anti-static material:1(107
—
1(1010( Grounding current limiting resistance: 1M(
DŽ
Floor bearing should be greater than 450Kg1m2
DŽ
Environm
ent
5
—
40(C sustainable ) 0
—
45(C short time)
installing air-conditioning is recommended
Relative
temperature
20%
—
80% sustainable 10%
—
90% short time
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 brightnessless 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.
2.2.3 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
