Installation Instructions

12
•••
Note: Marked * fuses are in the set as standard.
3.3 Determining Place of Installation
3.3.1 Scanner unit
A radar's target detection capacity varies greatly depending on the fitted position of the
scanner. An ideal fitting position is a location high above the ship's keel line where there is
no obstacle all around the scanner. In an actual ship, such an ideal location is limited by
various factors. Therefore, consider the following suggestions when you determine the place
to install the scanner:
(a) Install scanner at a position as high as possible.
The higher the installation position, the longer the radio ranging distance.
Install the scanner at a position as high as possible after considering the ship's
hull structure and radar maintainability.
(b) Install scanner away from smoke-stack and mast
If the scanner is installed at the same height as the smoke-stack or mast,
radar waves may be blocked, creating shadow zones or generating false echoes.
Therefore, do not install the scanner at such a position.
(c) Install scanner forward away from obstacle.
To avoid creating shadow zones or generating false echoes, install the scan-
ner at a position nearer to the ship's bow away from obstacles. When installing
the scanner on a mast, position it in front of the mast. (If obstacles cannot be
avoided for the ship's structural reasons, refer to "Shifting away from obstacles"
described Page 13.)
(d) Do not install the scanner near hot or heat-generating items.
Do not install the scanner at a position where it may be subjected to smoke
or hot air from smokestacks or heat from lamps.
(e) Install the scanner away from antennas of other equipment.
Install the scanner as much away from the antennas of a direction finder,
radio transceiver, etc. as possible.
To eliminate the interference, install the scanner
away from the antenna of radio transceivers.
(f) Make the cable length as short as possible.
Keep the distance from the scanner to the display unit within the standard
cable length of 10 m. If you use longer cable for unavoidable reasons, limit the
cable length to a maximum of 30 m for RA40C and 100 m for RA41C/42C.
3.3.2 Display unit
The display unit can be installed on desktop, wall surface, or ceiling. Determine the
place to install the display unit that is convenient for navigation and radar operation after
considering the following suggestions:
Supply voltage
used
Main Fuse Motor Fuse
DC12V 10A/250V or 125V
(6.3
•
x 32mm)
5A/250V or 125V
(5
•
x 20mm)
DC24V 8A/250V or 125V *
(6.3
•
x 32mm)
T3.15A/250V or 125V *
(5
•
x 20mm)
!
CAUTION