Kelvin Hughes CAE-A30-7 'X' Band Radar User Manual installation manual
Kelvin Hughes Limited 'X' Band Radar installation manual
installation manual
CHAPTER 2
INSTALLATION
GENERAL
1 The Antenna/Transceiver is to be mounted on a rigid platform which provides clearance
from other structures for the rotating antenna. The height and position of the platform is
to be such that the radiated beam is unobstructed forward (i.e. beam-to-beam through the ship’s
head) and the vertical radiated beam clearing the ship’s bow.
2 There are two versions of the MkV Transceiver covered in this publication:
(1) Low Speed Turning Mechanism CAE-A30/7.
(2) High Speed Turning Mechanism CAE-A30/8.
3 The High Speed Turning Mechanism uses an external downmast Power Supply
CZZ-A22 to provide +40V to drive the turning motor. The Low Speed Turning
Mechanism uses +27V power supplies from the display to drive the turning motor.
SAFETY NOTES
4 Electrical power supplies are to be isolated to any part of the platform when mounting an
antenna/transceiver. A suitable safety platform or harness should be used to avoid
personal injury when working aloft.
(1) A working platform is to be provided for installing or servicing the assembly.
This should be positioned approximately a metre below the base of the
Transceiver housing with a guard rail surrounding it.
(2) A flat steel plate (12mm thick approx.), pre-drilled (in accordance with Figure 1)
to accommodate the Transceiver unit and the cable from the Display. The steel
plate must be mounted horizontally and braced with struts for rigidity.
(3) The plate has to be sited in a clear area where the turning Antenna cannot be
obstructed by any cables, mast halyards etc.
(4) The Antenna and Transceiver Unit must be hoisted to the fixing position using a
secured block and tackle or rope strops.
(5) Safety personnel must ensure that persons do not encroach on the area of work.
(6) The Antenna and Transceiver Unit must NOT be lifted by the array, but the
complete unit secured and hoisted evenly.
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EQUIPMENT LOCATION
Transceiver and Turning Mechanism
5 The Transceiver/Turning Mechanism should be installed in such a position where Blind
Arcs, caused by obstructions, e.g. masts, funnels, are eliminated or minimised. Funnels,
crosstrees and other large obstructions can also reflect energy and give rise to spurious echo
returns especially in close proximity to land.
6 The Transceiver/Turning Mechanism must not be mounted where the temperature
exceeds 70°C.
7 The Transceiver/Turning Mechanism must be kept clear of ship’s flexible
communication aerials to avoid damage to both.
8 The Transceiver/Turning Mechanism must be mounted more than 914mm above any flat
surface, when the flat surface is greater than the diameter swept by the antenna.
9 The Transceiver/Turning Mechanism must not be positioned in the close proximity of
any magnetic compass or D/F aerial, etc.
40V Power Supply CZZ-A22
10 The following points must be considered when selecting a suitable site for the Power
Supply:
(1) The Power Supply is designed for bulkhead mounting, away from the turning
mechanism.
(2) Consideration must be given to accessibility for servicing and protection from
adverse conditions. For ease of maintenance, the top of the power supply should
not be mounted more than 1.6m above the deck.
(3) Ensure that there is sufficient space below the unit for cable entries.
(4) The power supply should be mounted in a position which allows for ventilation
and cooling.
NOTE The power supply air circulation must not be obstructed.
(5) Do not fit the power supply in an acoustic, noise sensitive area, e.g. The bridge or
operations room.
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FITTING NOTES
Transceiver and Turning Mechanism
11 The Antenna and Transceiver are specified and supplied separately (options are shown
on Chapter 1, Figure 1). Refer to Figure 1 for outline dimensions and fixing centres. The
following criteria are to be observed when installing:
NOTE: Assemble the two units together prior to hoisting into the installation position.
CAUTION
Do not remove the transparent film covering the waveguide outlet as this prevents the
ingress of water or moisture.
(1) Remove the protective caps, tapes etc. Ensure the waveguide faces are clean and
free from grease. Fit the appropriate ‘O’ ring. Fit the Antenna array to the
transceiver with the eight bolts, holding it loosely in position. DO NOT
TIGHTEN THE BOLTS. Refer to Figure 2.
(2) Align the waveguide from the Antenna to the Rotating Joint and fit the four
waveguide bolts. Do not force the waveguide to the coupling face. Tighten the
waveguide bolts evenly until the mating faces are flush. Torque load the Antenna
retaining bolts to 19 to 24 Nm (14-16 lb./ft).
(3) Hoist the Transceiver and Antenna assembly, (ensuring the slings do not foul
with the Array), to the mounting plate.
(4) Mount the Transceiver facing forward (removable cover facing aft). Fit the
retaining bolts and torque load to 50lb/ft (75kg/m) then gain access to the interior
by removing the rear cover.
NOTE: The outer casing of the Transceiver must be bonded to the ship’s superstructure using
a copper earthing strap connected to the earthing point shown in Figure 1.
(5) The connecting cable from the Transceiver to the Display should be kept to a
maximum of 60 metres. Do not exceed 60m without consulting the Kelvin
Hughes Technical Department.
(6) Fit the Monitor Arm (if supplied) onto the side of the casing and secure the clamp
with the four retaining screws. The monitor arm cable is passed through the
smaller cable gland and clamped. The cable screen is to be earthed by the ferrules
in the cable gland assembly.
40V Power Supply CZZ-A22
12 The +40V Power Supply is fitted to the bulkhead using the four installation bolts
provided.
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