1. System Installation Requirements
1-6
TI 32P01J10-01EN
Air Purity
The dust in the control room should be kept below 0.3 mg/m
3
. Minimize corrosive gas such as
hydrogen sulfide (H
2
S), sulfur dioxide (SO
2
), chlorine, and conductive dust such as iron powder
and carbon.
The allowable content of H
2
S, SO
2
, or any other corrosive gas varies with temperatures, humidity,
or existence of other corrosive gas. Consult Yokogawa if corrosive gas exists.
Magnetic Field
Do not install the CRT near cables with heavy current flowing or in the magnetic field of a power
supply. If installed in such locations, the display may be distorted or its colors may be affected by
the magnetic fields.
Electric Field Strength (Electric Wave Condition)
For the proper and stable operation of this system, the field electric strength of the location for the
equipment should be controlled as following:
10 V/m or less (26 MHz to 1.0 GHz)
10 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 10 W or less, the distance from this system should
be kept 1 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)
F010202.ai
Nov. 27, 2015-00
