Kelvin Hughes CAE-A30-8 'X' Band Radar User Manual Manual

Kelvin Hughes Limited 'X' Band Radar Manual

Manual

CHAPTER 2INSTALLATIONGENERAL1 The Antenna/Transceiver is to be mounted on a rigid platform which provides clearancefrom other structures for the rotating antenna. The height and position of the platform isto be such that the radiated beam is unobstructed forward (i.e. beam-to-beam through the ship’shead) 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 SupplyCZZ-A22 to provide +40V to drive the turning motor. The Low Speed TurningMechanism uses +27V power supplies from the display to drive the turning motor.SAFETY NOTES4 Electrical power supplies are to be isolated to any part of the platform when mounting anantenna/transceiver. A suitable safety platform or harness should be used to avoidpersonal 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 theTransceiver 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 steelplate 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 beobstructed by any cables, mast halyards etc.(4) The Antenna and Transceiver Unit must be hoisted to the fixing position using asecured 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 thecomplete unit secured and hoisted evenly.KH1207Chapter 2mkv 3 Issue 2
EQUIPMENT LOCATIONTransceiver and Turning Mechanism5 The Transceiver/Turning Mechanism should be installed in such a position where BlindArcs, 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 echoreturns especially in close proximity to land.6 The Transceiver/Turning Mechanism must not be mounted where the temperatureexceeds 70°C.7 The Transceiver/Turning Mechanism must be kept clear of ship’s flexiblecommunication aerials to avoid damage to both.8 The Transceiver/Turning Mechanism must be mounted more than 914mm above any flatsurface, 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 ofany magnetic compass or D/F aerial, etc.40V Power Supply CZZ-A2210 The following points must be considered when selecting a suitable site for the PowerSupply:(1) The Power Supply is designed for bulkhead mounting, away from the turningmechanism.(2) Consideration must be given to accessibility for servicing and protection fromadverse conditions. For ease of maintenance, the top of the power supply shouldnot 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 ventilationand 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 oroperations room.KH1207Chapter 2Issue 2 4 mkv
FITTING NOTESTransceiver and Turning Mechanism11 The Antenna and Transceiver are specified and supplied separately (options are shownon Chapter 1, Figure 1). Refer to Figure 1 for outline dimensions and fixing centres. Thefollowing criteria are to be observed when installing:NOTE: Assemble the two units together prior to hoisting into the installation position.CAUTIONDo not remove the transparent film covering the waveguide outlet as this prevents theingress of water or moisture.(1) Remove the protective caps, tapes etc. Ensure the waveguide faces are clean andfree from grease. Fit the appropriate ‘O’ ring. Fit the Antenna array to thetransceiver with the eight bolts, holding it loosely in position. DO NOTTIGHTEN THE BOLTS. Refer to Figure 2.(2) Align the waveguide from the Antenna to the Rotating Joint and fit the fourwaveguide bolts. Do not force the waveguide to the coupling face. Tighten thewaveguide bolts evenly until the mating faces are flush. Torque load the Antennaretaining bolts to 19 to 24 Nm (14-16 lb./ft).(3) Hoist the Transceiver and Antenna assembly, (ensuring the slings do not foulwith the Array), to the mounting plate.(4) Mount the Transceiver facing forward (removable cover facing aft). Fit theretaining bolts and torque load to 50lb/ft (75kg/m) then gain access to the interiorby removing the rear cover.NOTE: The outer casing of the Transceiver must be bonded to the ship’s superstructure usinga 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 amaximum of 60 metres. Do not exceed 60m without consulting the KelvinHughes Technical Department.(6) Fit the Monitor Arm (if supplied) onto the side of the casing and secure the clampwith the four retaining screws. The monitor arm cable is passed through thesmaller cable gland and clamped. The cable screen is to be earthed by the ferrulesin the cable gland assembly.40V Power Supply CZZ-A2212 The +40V Power Supply is fitted to the bulkhead using the four installation boltsprovided.KH1207Chapter 2mkv 5 Issue 2

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