Simrad 38-9 - REV B, Installation Manual

Page 1: ...Installation manual Simrad 38 9 38 kHz Single beam transducer M A X I M I Z I N G Y O U R P E R F O R M A N C E A T S E A www SIMRAD com ...

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Page 3: ...ow to install the Simrad 38 9 Single beam transducer The information must be regarded as general guidelines and recommendations only The installation shipyard must design and manufacture installation hardware to fit the 38 9 transducer on each individual vessel 305265 A August 2006 ...

Page 4: ...or any errors or omissions 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 The user must be familiar with the contents of the appropriate manuals before attempting to operate or work on the equipment Simrad disclaims any responsibility for damage o...

Page 5: ...Flush mounting in a steel tank 19 Acoustic window 21 Inside the hull 23 Drop keel 25 Retractable transducer 26 CABLE GLANDS 27 Order numbers 27 Cable gland for steel hulls 28 Cable gland for wood or GRP hulls 29 Cable glands for small hulls 30 Cable splicing 31 STEEL CONDUIT 32 HANDLING AND MAINTENANCE 33 Approved anti fouling paints 34 DRAWING FILE 35 Single frequency single beam low power transd...

Page 6: ...Simrad 38 9 4 305265 A ...

Page 7: ...y the proper authorities Transducer order number KSV 203635 A cable gland kit for steel hull is included with the delivery Other cable glands must be ordered separately Transducer installation The next chapter in this manual provides general guidelines for transducer installation The drawings specific for the 38 9 transducer are located in the Drawing file Technical specifications Refer to the 38 ...

Page 8: ...sducers Cavitation is the formation of small bubbles in the water due to the resulting local pressure becoming negative during parts of the acoustic pressure cycles The cavitation threshold increases with the hydrostatic pressure Vessel heave Heave is the up and down movement of the vessel It disturbs the echo traces in the echogram so that a flat bottom is displayed as a wave A transducer locatio...

Page 9: ...r bubbles in the water Furthermore air bubbles in the sea water are pressed down below the hull and mixed into the boundary layer The boundary layer is thin underneath the forward part of the vessel and increases in thickness as it moves towards aft If the sides of the hull are steep some of the air bubbles in the boundary layer may escape to the sea surface along the vessel sides It is our experi...

Page 10: ...e when the vessel is in normal trim as this will provide the most accurate echo information However it is also very important that the water flow over the transducer face is laminar In order to ensure laminar flow the transducer face may be tilted slightly upwards in relation to the water flow This allows the flowing water to meet the face directly and assures laminar flow The inclination angle mu...

Page 11: ...f the hull length at water line L If the vessel hull has a bulbous bow this may well be a good transducer location but also here must be taken into consideration the flow pattern of the aerated water Often the foremost part of the bulb is preferable CD17004C A B Recommended location of the transducer on a bulbous hull A Thruster B Transducer location 305265 A 9 ...

Page 12: ...nsducer These are the recommended methods to mount a circular transducer Topics Transducer blister on page 11 Box keel on page 17 Flush mounting in a steel tank on page 19 Acoustic window on page 21 Inside the hull on page 23 Drop keel on page 25 Retractable transducer on page 26 10 305265 A ...

Page 13: ...amping 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 transducer blister Ensure that the surface of the transducer face the blister the hull plating a...

Page 14: ...pport bar E is used to support the transducer The purpose of this support is to prevent the transducer from being pushed up into the blister in heavy seas CD017010A H E E K G B D A C F J I A Streamlined blister B Stiffening rib C Drainage holes D Inclination angle E U shaped support bar F Forward G Cable service loop H Stuffing tube I Minimum 400 mm J Rounded corners K Air outlet 12 305265 A ...

Page 15: ...principles as for a large transducer apply E E A C G D F B CD017010B A Streamlined blister B Mounting ring C Clamping ring D Guide E Air outlet F Forward G Transducer cable Note that the transducer cable must be provided with a cable loop inside the blister Observe the vertical forward edge of the blister This will guide the water to each side of the blister 305265 A 13 ...

Page 16: ...hout a clamping ring which makes it necessary to use a different mounting ring design A B C H F E E G D I CD017010E A Streamlined blister B Mounting ring C Bolt D Self locking threads E Air outlet F Forward G Transducer cable H Transducer Note that the transducer cable must be provided with a cable loop inside the blister Observe the vertical forward edge of the blister This will guide the water t...

Page 17: ...to the mounting ring using threaded rods The transducer cable penetrates the hull in a stuffing tube Leave an adequate loop of the cable behind the transducer for easy mounting or removal of the transducer Toe in The primary consideration must be to allow laminar water flow In most cases this is achieved by designing the blister in parallel with the keel However if the blister is located close to ...

Page 18: ...nce X should be approximately 1 meter The vertical distance Y must in general be as small as possible This is important to prevent the keel from shadowing the transducer beam in shallow waters CD17010D B Y A X A Keel B Transducer blister X Horizontal distance between keel and blister Y Vertical distance between the blister surface and the keel 16 305265 A ...

Page 19: ... 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 trans...

Page 20: ...e figure below illustrates a symmetrical box keel installation CD17011A A B D C E A Box keel B U shaped support bar only required on large transducers C Stuffing tube D Cable in steel conduit E Cable service loop 18 305265 A ...

Page 21: ...ransducer 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 hull plating Ensure that the surface of the transducer face 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 sup...

Page 22: ...ansducer mounting in a steel tank is shown in the figure below CD17012A B A G C D E F A Steel tank B Water C Drainage hole D Cable service loop E Steel tube for air outlet F Stuffing tube G Cable in steel conduit 20 305265 A ...

Page 23: ... 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 t...

Page 24: ...ounted inside the tank behind a strong acoustic window which could be made of polycarbonate The tank is filled with oil CD017012B B A C G D E F A Steel tank B Oil C Acoustic window D Cable service loop E Stuffing tube F Cable in steel conduit G Oil inlet 22 305265 A ...

Page 25: ...for advice 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 ...

Page 26: ...n the figure below is mounted inside the hull The tank is filled with oil CD017012C B A C D E F G H 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 24 305265 A ...

Page 27: ...cers Such instrument keels have been built mainly on research vessels often protruding as far as three meters below the hull At that depth the water is free of air bubbles up to very high sea states The vessel is then able to perform reliable acoustic measurements in open sea a larger part of the year CD017012D B C A A Instrument keel shaft B Lowered position C Bottom view 305265 A 25 ...

Page 28: ...ls with a hull where it is difficult or impossible to install a blister it may still be worth while The principles of a hull unit with a retractable transducer is shown below Vessels without a keel and with a wide flat bottom is an example where a retractable hull unit can be the only acceptable method for bringing the echo sounder transducer below the boundary layer CD017012E B E C D A A Transduc...

Page 29: ...finding suitable areas of the hull for mounting transducer cable glands due to existing water tanks concrete ballast or other obstacles A possible solution in such cases is to run the transducer cables in a steel conduit aft along the hull until a suitable cable gland location is available The respective cable gland can then be installed as described in the following instructions Note Simrad takes...

Page 30: ...ure that you do not damage the transducer cable by tightening the packing nipple too hard F Cable to the echo sounder or a junction box The cable gland kit includes all of the necessary parts needed to install the unit except screws Simrad recommends that a one inch steel conduit that the transducer cable will be run through with an inside threaded diameter of three quarter inches is welded to the...

Page 31: ...D Hole diameter 28 mm E Steel conduit F Cable to the echo sounder or a junction box The cable gland kit includes all of the necessary parts needed to install the unit except screws Simrad recommends that a one inch steel conduit that the transducer cable will be run through with an inside threaded diameter of three quarter inches is attached to the gland s packing nipple This connection must be wa...

Page 32: ...lastic disk D Rubber gasket E Stuffing tube F Backing nut bronze G Backing washer plastic H O ring 42 5 x 3 0 N I O ring 39 5 x 3 0 N J Cable to the echo sounder or a junction box Stuffing tube hole diameter 36 mm 1 5 mm Apply ample amount of sealant between the backing washer H and the hull plate The cable gland kit contains all the listed parts except the sealant Note The two O rings must be cle...

Page 33: ...r the wires together with only electrical tape for insulation as this will result in electrical noise and reduced operational performance To splice the cable use a metal junction box The chassis of the junction box must be grounded but the cable shielding must NOT be connected to the junction box ground 305265 A 31 ...

Page 34: ...must be unbroken and watertight from the transducer to above the water line From there the cable can be pulled further or a junction box can be installed to facilitate further connections Note that the steel conduit must act as a continuous electrical screen all the way To ensure proper shielding the conduit must be electrically connected to the echo sounder transceiver chassis Steel conduit dimen...

Page 35: ...int may be applied to the transducer face Because some paint types may be aggressive to the polyurethane in the transducer face please consult Simrad s list of approved paints Note Arctic tanks have acoustic windows made of polycarbonate These must neither be painted nor cleaned with chemicals During dry docking of the vessel the transducer face may be cleaned for shells and other marine fouling B...

Page 36: ... Marine Coatings Address World wide offices Wesite www international marine com 1 Intersleek tie coat 425 FCS BXA386 BXA390 BXA391 Grey HKA563 HKA570 HKA571 Yellow Mix BXA386 BXA390 and BXA391 first then apply When dry mix HKA563 HKA570 and HKA571 apply 2 Intersmooth 360 Ecoloflex SPC 3 Micron Ekstra Hempel IFA Coatings Head office address Hempel A S Lundtoftevej 150 Kgs Lyngby DK 2800 Copenhagen ...

Page 37: ...lted into the mounting ring The original installation drawings are available on PDF and AutoCad format Visit www simrad com to download In addition to the drawings available in this chapter an additional drawing is provided on the web site This is drawing 599 203664 describing an optional steel tank for the transducer Drawings Single frequency single beam low power transducer connection on page 36...

Page 38: ...power output is achieved when the GPT is equipped with a single transmitter board In most systems this will result in a 2 kW output power but older GPTs may only be capable of supplying 1 kW M E F J H D C K L A B N Transducer cable D C Junction Box 1 1 Optional GPT Transducer socket Screen Connect to plug housing W802 1 Rev E Single frequency single beam low power termination Note The cable screen...

Page 39: ...s ø340 Cable length 20 m Cable diameter 10 9 mm ø310 ø150 ø71 30o 150 100 ø12 R5 ø18 12 ø336 5 CD017015J Page 1 of 1 834 203644 Rev B Note All measurements are in mm unless otherwise specified The drawing is not in scale 305265 A 37 ...

Page 40: ...drawing is not in scale WARNING lift the transducer by the cable Do not Air outlet Self locking threads Washer Bolt M10x100 Maximum torque 31 Nm FORWARD Steel blister to be manufactured by the installation shipyard Simrad dwg 830 203430 Mounting ring may be supplied by Simrad Simrad dwg 499 203337 38 305265 A ...

Page 41: ... echo sounder above water level Recommended transducer location Approx 3 deg X Min X 4 Minimum 400 mm Steel conduit Recommended to minimize electrical interference Minimum inside diameter 35 mm Wall thickness 6 mm or 4 5 mm if galvanized conduit is used CD017015K Page 2 of 2 820 203666 Rev A Note All measurements are in mm The drawing is not in scale 305265 A 39 ...

Page 42: ...in accordance with Simrad procedure 842 202125 Self lock taps can be supplied by Simrad Surface treatment 1 Sand blast to SA 2 5 2 One coating of red ferric oxide primer Ø0 2 CD017015G Page 1 of 2 871 203337 Rev B Note All measurements are in mm The drawing is not in scale 40 305265 A ...

Page 43: ...21 1 Material St 52 3N DIN 17100 Round steel or plate 125 1 ø155 1 ø348 1 ø360 1 45 Chamfer 3 x 45 100 0 0 5 ø342 0 5 0 CD017015G Page 2 of 2 871 203337 Rev B Note All measurements are in mm The drawing is not in scale 305265 A 41 ...

Page 44: ...ents are in mm The drawing is not in scale Surface treatment To avoid acoustic noise it is very important that the surface of the blister is smooth Avoid cracks dents and other unevenness 1 Sand blast after grinding to SA 2 5 2 Apply one coat of red ferric oxide prime 3 No concavity is accepted 4 Maximum convexity is 3 mm 5 Small local hollows max 1 mm can be accepted 42 305265 A ...

Page 45: ...wing file Air vent holes R25 to 50 mm 100 243 Depends on dead rise Minimum 400 mm B A A B B B CD017015H Page 2 of 2 830 203430 Rev B Note All measurements are in mm The drawing is not in scale 305265 A 43 ...

Page 46: ... R150 23 15 10 30 45 5 Bottom plate must be smooth and even 1 No concavity is accepted 2 Maximum convexity is 3 mm 3 Small local hollows max 1 mm can be accepted CD017015I Page 1 of 2 871 203432 Rev A Note All measurements are in mm The drawing is not in scale 44 305265 A ...

Page 47: ...A A Minimum 400 mm Height depends on dead rise Materials Steel plate Fe 510 D1 St 52 3 N 6 and 10 mm R10 10 6 6 CD017015I Page 2 of 2 871 203432 Rev A Note All measurements are in mm The drawing is not in scale 305265 A 45 ...

Page 48: ... beam transducer 36 GRP hull cable gland 29 H Handling 33 Heave vessel 6 I Inclination angle 8 Installation drawings 35 L Layer boundary 7 Location recommendation 8 transducer 6 M Maintenance 33 Mounting arrangement drawing 38 Mounting ring acoustic window 21 blister 11 box keel 17 drawing 40 flush mounting 19 inside hull 23 N Noise air bubbles 6 bow thrusters 8 cavitation 6 propeller 7 protruding...

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Page 52: ... 82 8066 074 7 ISBN 13 978 82 8066 074 9 2006 Simrad Strandpromenaden 50 P O Box 111 N 3191 Horten Norway Simrad Horten AS Telephone 47 33 03 40 00 Telefax 47 33 04 29 87 simrad sales simrad com www simrad com ...