User manual SIMRAD ARCTIC TANK OUTLINE DIMENSIONS SCHEMA REV A

[. . . ] Interactive version on the document (CHM format) introduced. Rev. H September 2006 Copyright ©2006 Simrad Horten AS The information contained in this document remains the sole property of Simrad Horten AS. No part of this document may be copied or reproduced in any form or by any means, and the information contained within it is not to be communicated to a third party, without the prior written consent of Simrad Horten AS. Disclaimer Simrad Horten AS endeavours to ensure that all information in this document is correct and fairly stated, but does not accept liability for any errors or omissions. The document can be changed without prior notice. Warning The equipment to which this manual applies must only be used for the purpose for which it was designed. Improper use or maintenance may cause damage to the equipment and/or injury to personnel. [. . . ] However, if the blister is located close to the bow, the front of the blister may have a few degrees toe-in towards the bow. A C B (CD17010C) (A) = Keel (B) = Blister (C) = Toe-in angle Physical location The blister is placed on one of the sides of the hull, and the distance from the keel is a trade off between a close distance giving a turbulent flow of water in a narrow passage, and a large distance bringing the transducer higher up and also more affected by vessel roll. Normally a distance of approximately 1 m is a good compromise. 20 851-160164/H Ways of mounting the transducer Observe the horizontal and vertical distances (X and Y) between the keel and the transducer blister. On a medium sized vessel, the horizontal distance (X) should be approximately 1 meter. This is important to prevent the keel from shadowing the transducer beam in shallow waters. (CD17010D) B A X Y (A) = Keel (B) = Transducer blister (X) = Horizontal distance between keel and blister (Y) = Vertical distance between the blister surface and the keel 851-160164/H 21 Simrad Echo sounder transducers Box keel Vessels with a box keel may use this for transducer installation. If the box keel is too narrow to accommodate the transducer, it can be widened, either symmetrically or to one side only. In the last case the installation could also be described as a blister merged into the keel. Mounting and clamping rings Circular transducers may be provided with mounting and clamping rings, or with drawings to allow for local production of these. The mounting ring is welded to the hole in the box keel, while the clamping ring fits around the edge of the transducer body. Bolts through the clamping ring into the mounting ring will then secure the transducer between them. Note that several transducers use direction guides to allow correct mounting. Smooth surface Mounting screws or bolts must not be extruding from the box keel. Ensure that the surface of the transducer face, the box, the hull plating and putty around the transducer is as even and smooth as possible. Obstructions on these surfaces will create problems with turbulant flow. Horizontal support bar Large diameter transducers must be fitted with a horizontal support bar. Hulls made of wood or a sandwich type with foam in the middle, attenuate the sound so much that through hull sounding must be regarded as impossible. The loss varies with the distance between transducer face and the hull. In addition to the loss, the beam pattern is degraded, because a larger area of the hull is set into vibrations. Mounting and clamping rings Circular transducers may be provided with mounting and clamping rings, or with drawings to allow for local production of these. The mounting ring is welded to the hole inside the steel tank, while the clamping ring fits around the edge of the transducer body. Bolts through the clamping ring into the mounting ring will then secure the transducer between them. Note that several transducers use direction guides to allow correct mounting. Smooth surface Mounting screws or bolts must not be extruding from the acoustic window. Ensure that the surface of the window, the hull plating and putty around the transducer is as even and smooth as possible. Obstructions on these surfaces will create problems with turbulant flow. Horizontal support bar Large diameter transducers must be fitted with a horizontal support bar. This bar can be secured to the mounting ring using threaded rods. 28 851-160164/H Ways of mounting the transducer Example The transducer shown in the figure below is mounted inside the hull. The tank is filled with oil. G D A B H F E (CD017012C) C (A) = Steel tank (B) = Oil (C) = Hull plating (D) = Cable service loop (E) = Stuffing tube (F) = Cable in steel conduit (G) = Hole for oil filling (H) = Air outlet 851-160164/H 29 Simrad Echo sounder transducers Drop keel The use of a drop keel with the purpose of stabilising the vessel is well known. Such instrument keels have been built, mainly on research vessels, often protruding as far as three meters below the hull. [. . . ] We also recommend that you install the transducer cable in a steel conduit. Related topics Cable splicing on page 36 Steel conduit on page 37 54 851-160164/H GPT transducer terminations Split beam transducer This is the termination of the transducer cable from a single frequency, split beam transducer to the transducer socket on the General Purpose Transceiver Unit (GPT). The other end of the cable is permanently fixed to the transducer. Forward 3 Port 4 1 Starboard C B D A N M L K GPT Transducer socket 2 Sections seen from top of the transducer E F H J Transducer cable 1 2 3 4 White Black White Black White Black White Black Blue Black Blue Black Blue Black Blue Black Blue White Junction Box (1:1) (Optional) Channel 1 Orange White Green White Brown White H J E F Channel 2 Channel 3 C D A B Channel 4 Screen Alternative cable colours Connect to plug housing W802-4 Rev. E Single frequency, split beam termination If you need to splice the transducer cable, it is very important to use the correct cable, and to avoid ground loops. We also recommend that you install the transducer cable in a steel conduit. Related topics Cable splicing on page 36 Steel conduit on page 37 851-160164/H 55 Simrad Echo sounder transducers Split beam transducer to single beam transceiver This is the termination of the transducer cable from a single frequency, split beam transducer - wired as a single beam transducer - to the socket on the General Purpose Transceiver Unit (GPT). The other end of the cable is permanently fixed to the transducer. Forward 3 Port 4 1 Starboard C B D A N M L K GPT Transducer socket 2 Sections seen from top of the transducer E F H J Transducer cable 1 2 3 4 White Black White Black White Black White Black Blue Black Blue Black Blue Black Blue Black Blue White Orange White Green White Brown White Junction Box (1:1) (Optional) D C Screen Alternative cable colours Connect to plug housing W802-5 Rev. E Single frequency, split beam connected as single beam If you need to splice the transducer cable, it is very important to use the correct cable, and to avoid ground loops. [. . . ]