Raymarine ST50 plus Specifications download pdf (Page 18)

ST50 PLUS RADAR Operation and Installation Handbook

Using the outline drawing of the Scanner base or template in the back

of the manual as a guide, prepare the mounting surface with the four

mounting holes as required. Install the Scanner and secure it to the

mounting surface. The correct mounting hardware is stainless steel

hexhead bolts

5/16’,

l/4’

long with 18 UNC thread. A flat and lock

washers should be used. The Scanner should be parallel to the ship’s

waterline and oriented so the cable inlet is pointed AFT.

ANTENNA. It is recommended that the radar antenna be mounted

above objects which could interfere with the radar signal such as the

flying bridge, large engine stacks, and personnel. This may be difficult

on some vessels and in such a case it is recommended that a radar

mounting pedestal be used. Always turn off the radar system before

servicing the antenna or nearby equipment.

Caution:

When mounting the scanner unit, please observe a minimum

mounting surface thickness of

.25

inches. If the thickness of

the mounting base is too thin, the modulator PCB could

potentially be damaged (Fig. 2-8). The mounting base should

be at least0.25 inches thick. Use additional washers if necessary

to meet this requirement.

P.S./Modulator PC0

linch Mar

Thickness

Mounling bx.o(min. thickness 0.25 inch)

Plain washer

Cock washor

S~aioloss stcci bob

5116.10UNC

Section 2. Installation

Some vessel’s however, may adopt a HIGHER BOW angle when the

vessel is at it’s cruising speed that substantially alters and raises the

radar’s main radiation plane. In this case nearby target detection might

be poor. It may be helpful to lower the radar beam towards the parallel

by shimming the radar pedestal to tilt the beam angle slightly

downward with respect to the waterline.

The figure shows one approach, that of using an angled wood block

between the pedestal mounting feet and the mast or platform surface

to obtain the desired tilt angle. The shims may also be made from

aluminum plate wedges or simple flat washers.

Setting the Radiation

Plane

In the standard antenna

installation the scanner/

pedestal unit is mounted so

the array will rotate parallel to

the waterline. The beam of

the radar is approximately

25”

wide in the vertical direction

so target detection during the

vessel’s pitching and rolling

will be generally good.

,OEAL

RADIATION PlANE

Fig. 2-8

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Raymarine ST50 plus Specifications Page 18

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