Installing the Transceiver Unit
The Transceiver Unit is normally positioned close to the Hull Unit in the sonar room. The transceiver can also be installed in a dedicated compartment. The physical distance between the Transceiver Unit and the Hull Unit is restricted by the length of the transducer cables.
Prerequisites
You must be equipped with a standard set of tools. This tool set must comprise the normal tools for electronic and electromechanical tasks. This includes different screwdriver types, pliers, spanners, a cable stripper, a soldering iron, etc. Each tool must be provided in various sizes. We recommend that all tools are demagnetized to protect your equipment. Depending on the chosen installation method, additional tools may be required. Observe the relevant rules and regulations related to welding. The quality of the welding is critical to the safety of the vessel. Welding must only be done by a certified welder.
Note
If required, all documents provided by the shipyard for the physical installation of the SU90 system must be approved by the vessel’s national registry and corresponding maritime authority and/or classification society. Such approval must be obtained before the installation can begin. The shipowner and shipyard doing the installation are responsible for obtaining and paying for such approval.
Context
Free bulkhead space is required.
Observe the limitations due to the cable lengths. The physical distance between the Transceiver Unit and the Hull Unit is restricted by the length of the transducer cables. Remember to take into consideration the slack necessary to lower and hoist the transducer.
The distance to the nearest power outlet is restricted by the length of the power cable. If required, you may need to move the power outlet, or replace the power cable with a longer type.
Note
The Transceiver Unit is heavy. Make sure that the necessary manpower and lifting equipment are available before you start the installation work.
The Transceiver Unit must be mounted as a complete unit. The cabinet door must not be opened until the unit is securely fastened to the bulkhead.
Procedure
1 Prepare the location and the necessary tools.
2 Observe the installation requirements.
•  The Transceiver Unit must be mounted on the bulkhead.
•  The position must be chosen to fit the available cable lengths between the transceiver and the other units it connects to.
•  Provide ample space around the unit to allow for inspection, maintenance and parts replacement.
•  Make sure that the space allows the unit door to be fully dismounted for unobstructed access to its internal parts.
•  Make sure that the installation does not cause problems with existing cabling, ventilation ducts, piping, etc. Both sides of the bulkhead must be free.
•  Make sure that enough space is made available for maintenance purposes.
•  Make sure that adequate ventilation is available to avoid overheating.
•  Make sure that the installation method allows for the physical vibration, movements and forces normally experienced on a vessel.
3 Make sure that the chosen location meets the installation requirements.
4 Remove the two mounting brackets which are fastened to the shock absorbers on the Transceiver Unit.
An Allen key is provided for this purpose. It is located in the plastic bag fastened to the upper shock absorber.
5 Weld the mounting brackets securely to the bulkhead as shown in the illustrations.
6 Use a chain fall or similar device to lift the Transceiver Unit into position.
7 Bolt the cabinet to the mounting brackets.
Eight bolts are provided for this purpose.
8 Connect the grounding cable from the Transceiver Unit to the mounting bracket.
9 Do not connect any other cables. This will be done later in the installation process.