Installing the transducer cable
When the transducer has been placed under its mounting location, the cable can be pulled through the cable gland and bushing, and then through the steel conduit up to the transceiver.
Prerequisites
Before you can do this task, the following prerequisites must be met:
•  All relevant work instructions, procedures and standards must be available.
•  The bushing has been installed.
•  The steel conduit is mounted with all installation work finalized.
•  All relevant drawings have been approved by the classification society.
•  All relevant personnel (skilled shipyard workers, ship electricians) and their tools must be available.
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. We recommend that all tools are demagnetized to protect your equipment. The following specific consumables are required for this task:
•  Fish tape
•  Electrical tape
•  Cable ties
Context
The transducer cable is attached to the transducer, and it has a fixed length. The bushing and the associated parts are included in the delivery.
Note
All necessary precautions must be made to avoid damage to the cable while pulling it through the steel conduit. Make sure that all welding has been finalized before you pull the cable through the steel conduit. Heat may cause serious damage to the cable and the transducer.
These items are all provided as a part of the transducer delivery.
Image
A Bushing penetrates the hull plating
B Washer
C Rubber gasket
D Packing nipple
Procedure
1 Make sure that the steel conduit has been finished, and that all welding has been finalized.
2 Lower the fish tape (wire pulling tool) down from the top of the steel conduit, and through the bushing.
3 Make sure that the rubber gasket, washers and packing nipple are threaded onto the transducer cable.
These items are kept between the bushing and the transducer.
The packing nipple, rubber gasket and washers are provided with the transducer. Upon delivery, they are threaded onto the cable and temporarily secured, normally with wire wraps.
4 Fasten the end of the fish tape to the transducer cable using electrician’s tape.
5 Pull the cable carefully up through the steel conduit.
Continue until you reach the transceiver.Allow the transducer cable to form a service loop close to the transducer.
Note
Be careful! Make sure that you do not damage the outer surface of the transducer cable. If water leaks into a cable, it may damage the transducer beyond repair.
6 Allow the transducer cable to form a service loop close to the transducer.
7 Mount the packing nipple.
8 Tighten the packing nipple with enough force to inhibit water penetration.
When the packing nipple has been tightened, pull each cable to verify that it is fastened properly. If you can move the cable, you must tighten the packing nipple harder.
9 Seal the top of the steel conduit with a Roxtec (or similar) multi-diameter cable sealing.