1. System Installation Requirements
1-7
TI 33Q01J10-01E
Electric field strength (Electric wave condition)
For the proper and stable operation of this system, the electric field strength of the location for the
equipment should be controlled as following:
3 V/m or less (26 MHz to 1.0 GHz)
3 V/m or less (1.4 to 2.0 GHz)
1 V/m or less (2.0 to 2.7 GHz)
In case of the usage of wireless equipment such as transceiver nearby this system, note as
following:
• The door of this system should be closed.
• In case of the usage of transceiver with 3 W or less, the distance from this system should be
kept 1 m or more, with 10 W or less, 2 m or more.
• As for the usage of wireless equipment with 1 W or less such as mobile-telephone, PHS,
wireless telephone or LAN equipment, the distance should be kept 1 m or more. Attention
should be paid to the micro wave radiated from mobile-telephone or PHS even out of usage.
Following formula represents the electric field strength. However, the calculated value requests
ideal environment. Worse conditioned environment should be taken into consideration. In case
some wireless equipment is used nearby this system, this formula would be useless. The value
calculated through this formula should be considered noting other than reference.
E
=
d
k P
E: Electric field strength (V/m)
k: Coefficient (0.45 to 3.35; average 3.0)
P: Radiation power (W)
d: Distance (m)
F010203.ai
Installation Specification
Installable altitude: up to 2000 m above sea level
IEC 61010-1 installation category: II (*1)
IEC 61010-1 pollution level: 2 (*2)
*1: Also called overvoltage category. Covers impulse withstanding voltage. Class II applies to electrical equipment.
*2:
Level of adhesion of solid, liquid, gas, and other foreign substances which reduce insulation resistance. Level 2 applies to
ordinary indoor atmosphere.
SEE
ALSO
See “Installation Environment Specifications” at the end of this chapter.
Feb. 1, 2009-00
