FIG FIG FIG FIG TABLE FIG FIG TABLE FIG FIG & WWE woAM EE OO an AnUTTETEUDE Be SB PEE PF ws wine we bum bo Re Ne bilomummnunk au hb hem & RS) nh we On LIST OF DRAWINGS EXAMPLE OF A TYPICAL INSTALLATION BoTTom PARTS MSSBSV AND MSDBSV BOUNDARY LAYER SPEED DISTRIBUTION BoTTOM FLANGES MSSBSV - SEA VALVE ASSEMBLY DIAGRAM, SINGLE BOTTOM MSSBSV - TRANSDUCER MSSBSV - MAIN DIMENSIONS MSSBSV - ANGLE TOLERANCES ON INSTALLATION OF BOTTOM FLANGES MSSBSV - ORIENTATION OF TRANSDUCER CONNECTING TUBE MSDBSV - SEA VALVE ASSEMBLY DIAGRAM DOUBLE BOTTOM MSDBSV - MAIN DIMENSIONS MSDBSV - INTERMEDIATE TUBE MANUFACTURE MSDBSV - BLANKING PLATE MANUFACTURE INTERMEDIATE TUBE AND TRANSOUCER TUBE LENGTH WELDING INTERMEDIATE TUBE ORIENTATION OF TRANSDUCER CONNECTING TUBE ELECTRONICS UNIT, MAIN DIMENSIONS ELECTRONICS UNIT, CHASSIS MOUNTING ELECTRONICS UNIT, CONNECTION DIAGRAM LEB (Loc Extension Box), ULEB P.c.BoaRD LEB, MAIN DIMENSIONS LEB, CONNECTION DIAGRAM LEB, SWITCH SETTING DIAGRAM ANALOG SPEED INDICATORS DIGITAL SPEED INDICATORS LSS - Loc Sevector Switch CABLE CONNECTION DIAGRAM Test FACILITIES - WATER TRACK TesT FACILITIES - BOTTOM TRACK INDICATORS, TEST POINTS AND FUSES = WATER TRACK INDICATORS, TEST POINTS AND FUSES = BOTTOM TRACK PRINCIPLE OF OPERATION PRINCIPLE OF FUNCTION, BOTTOM TRACK PRINCIPLE OF FUNCTION, WATER TRACK PaGE 2 3 oN 44 45 47 50 51SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION 1 1. 1. i. 2 2. 2. 2, 2. 2. 3 3. 3.2 4 4. 4. 4 5 3. 5. 5. 5. 6 6. 6. 6. 6. 6. 7 7. 7.2 8 9 9.1 3. 1 aie mune i 1 2 3 bane 1 2 3 4 5 CONTENTS SYSTEM DESCRIPTION INTRODUCTION EQUIPMENT SPECIFICATION EQUIPMENT WEIGHT AND DIMENSIONS INSTALLATION TRANSDUCER SITING REQUIREMENTS BOUNDARY LAYER NOISE AND CAVITATION OTHER FACTORS AFFECTING ACOUSTIC LOGS INSTALLATION OF BOTTOM PARTS MOUNTING SET SINGLE BOTTOM SEA VALVE (MSSBSV! SEA VALVE ASSEMBLY TRANSDUCER INSTALLATION MOUNTING SET DOUBLE BOTTOM SEA VALVE (MSDBSV) INTERMEDIATE TUBE AND BLANKING PLATE MANUFACTURE SEA VALVE ASSEMBLY TRANSDUCER INSTALLATION ELECTRONICS UNIT AND CABLES ELECTRONICS UNIT Log EXTENSION BOX (LEB) DISPLAY UNITS CABLE CONNECTIONS COMMISSTONING AND TESTING INITIAL CHECKS Test - RELATIVE SPEED (W/T) Test - TRUE speep (B/T) SPEED CALIBRATION ADDITIONAL TESTS PRINCIPLE OF OPERATION/FUNCTION PRINCIPLE OF OPERATION PRINCIPLE OF FUNCTION SPARE PARTS AND ACCESSORIES - OPTIONAL MAINTENANCE USER PRECAUTIONS MAINTENANCE OF BOTTOM PARTS CERTIFICATESSECTION 1 SYSTEM DESCRIPTION 1a INTRODUCTION SAL-840 was introduced by Consilium Marine as THE IDEAL LOG FOR ALL SIZES AND TYPES OF SHIPS. Its performance and accuracy exceed the specification laid down by IMO. The log function has been proved in extensive sea trials. SAL-840 is the result of many years’ development to provide a log for simultaneous true and relative speed measurement. The system uses only one transducer and it contains two pairs of active elenents. One pair works with 4 MHz (watertrack) and one pair with 150 KHz (bottom track). It operates with the acoustic correlation principle, i.e. the speed is measured by comparing the time delay between echoes received by the two elements orientated fore and aft in the transducer. Simultaneous true speed measurements (bottom track, B/T) and relative speed measurements (water track, W/T) take place in water depths fron 3 down to 300 m. In deeper water all displays and other outputs automatically shift over to water track 12 cm below the ship's hull. The echo signals from the transducer are processed by two microcomputers in the electronic unit. The output is then fed to a distribution box (LEB) and spread to one or nore of the speed, distance or depth indicators and other users. SAL-840 comprises bottom parts with transducer, electronic unit, mode switch and indicators. The standaré items are shown in Fig. 1.1. The transducer is connected to the electronic unit via a 30 m cable. The outputs from the electronic unit provide both pulse frequencies and voltages for various types of indicators and other users. SAL-840 basic equipment comprises the following items: Electronic unit ELC-24-1 Transducer with 30 m cable Log selector switch LSS-2-1 Log extension box LEB-1-2 User's manual, 3 pcs Set of onboard consumable spares (fuses) The electronic unit is housing two printed circuit boards and one integral power supply for 110 or 220 VAC supply. Alarm outputs are provided to indicate power loss and/or log failure. The unit is pro- tected by fuses. As shown in Fig 1.2 there are two standard bottom part sets available: 1. MSSBSV - Mounting set for single bottom with sea valve 2. MSDBSV - Mounting set for double bottom with sea valve ‘These bottom parts are approved by several classification societies. SAL-840 Manual 1TRUE AUTO/ Speed UT PORT switch Wing TRUE Speed & Dist. TRUE DEPTH REL. TRUE Speed Speed Speed (& STBO Oise Wing 4x200 44200 Q BRIDGE 00 Power ps/nm ps/nm oofo : Q fail. 18 RS jit ot Rob i} 220/110 vac 50760 Wz, 3x1.5 nn 220/110 vac 50760 Wz 3x1. San? Junotion Box LEB Cables to indicators 0.5 mm? Normal copper shielded ship's cable 19 x 0.5 mn? normal copper ‘shielded ship's cable Electronic Unit ELC-24-1 Transducer cable, 30 » C.M. delivery Transducer Fre. 1.1 Example oF A TyPIcaL INSTALLATION SAL-840 ManualMin. height 1000 nn To allow insertion/ a1 renoval of transducer. 800 mm Dia. 220 mm i MSSBSV MSDBSV Fre. 1.2 Bottom PARTS SAL-840 Manual 31.2 EQUIPMENT SPECIFICATION The following is a breakdown of the specification of SAL-840. Details and dimensions of the different bottom parts are included in the appropriate sections describing the installation procedure. Technical Specification NERAL TRU-4-1 Transducer with 30 m cable ELC-24-1 ELECTRONIC UNIT Input voltage 110/220 VAC +10% -15% 50/60 Hz +/-5% Rating 125 VA Operating temperature 0 to +55 degrees Celcius Dimensions 480 mn (H) x 360 mm (W) x 150 mm (D) Protection class IP 54 LEB-1~1 LOG EXTENSION BOX Input voltege 120/220 VAC +10% -15% 50/60 Hz +/-S% Rating 300 VA Operating temperature 0 to +55 degrees Celcius Dimensions 270 mm (H) x 480 mm (W) x 150 m (D) Protection class IP 54 Speed display output B/T 20000p/nn (max 4 displays) W/T 20000p/nn (max 4 displays) Depth display output 2 ms p/nm (max 2 displays) Speed output for external users Totally 8 selectable outputs of B/T 200 or 400 p/nm (20000 p/nm, option) w/t 200 or 400 p/nm ( “ee ) Length of cable from electronic unit to indicator 400 m max (normal screened ships cable) ER NG Speed Range © to +30 knots Speed Accuracy 0,1 knots below 10 knots 1'% above 10 knots Distance Accuracy 1 % distance run Analogue Speed Output 0,1 V/knot, 5 mA max Digital Speed Output 20000 pulses/nm +/-5 VDC 5 mA max Relay Output 4 x 200 pulses/nm 240 VAC 0,5 A Changeover contacts for log/power failure alarm, 240 VAC 0,5 A BOTTOM TRACKING Speed Range -8 to +30 knots Depth Range 3 to 300 m Speed Accuracy 0,1 knot below 20 knots SAL-840 Manual 4Distance Accuracy Depth Accuracy Analogue Speed Output Digital speed output Relay output Analogue Depth Signal Digital Depth Signal 5 % above 20 knots 5 % of actual value =5 % of actual value 1 V/knot, 5 mA max (000 pulses/nm +/-5 VDC, 5 mA max x 200 pulses/nm, 240 VAC 0,5 A/10 VA +01 VDC/m, 5 MA max ms pulses/m, +/-5 VDC, 5 mA max. 1.3 EQUIPMENT WEIGHT AND DIMENSIONS system Unit Weight Dimensions Master Electronic Unit 15,0 kg 480 x 360 x 150 mm Mode Selector Switch 0,3 kg 144 x 144 x 50 nm DD-1- Speed, Distance and Depth Indicators 2,5 kg 144 x 144 x 200 mm Transducer 8,0 kg Dia. 92 x 200 mm Bottom Parts (single/ double 65,0 kg 520#x 600 mm *(Including sea valve) SIA-1- Analog speed indicator 1,4 kg 144 x 144 x 150 mm LEB-1-1 Log Extension Box 10,7 kg 475 x 235 x 150 mm SAL-840 Manual 5SECTION 2 INSTALLATION (GENERAL) This section is intended to make the user aware of the various factors to be considered when selecting a position for the transducer. It is of utmost importance that the position of the transducer is correct in order to achieve good performance of the log systen. ‘The SAL-840 transducer is designed for flush mounting with the hull. It measures the ship's speed in relation to the sea-bed at depths from 3 down to 300 m (true speed) and in relation to a water mass approximately 120 mm below the hull (relative speed). This makes it suitable for installation onboard ships of all sizes. 21 10. TRANSDUCER LOCATION REQUIREMENTS The transducer should be installed in the foremost area of the vessel, if possible, in'a perpendicular position CLOSE TO THE KEEL LINE. It may also be installed in the fore peak or ina double bottom peak. The final choice of transducer position MUST BE APPROVED by Consilium Marine AB, otherwise the equipment guarantee is not valid. Install CLOSE TO CENTRE LINE OF THE SHIP. The compartment in which the transducer is installed may be sealed by a manhole or a hatch but the compartment must be accessible for service. on tankers the installation position MUST NOT be within the Ex-area. The transducer MUST NEVER come into contact with explosive cargo. The transducer position is recommended to be at least 2m from any echo sounder transmitters or similar devices. ‘The outer skin of the vessel in the vicinity of the transducer position must be free from sudden projections, steps and sharp edges which could cause water turbulence and inaccurate speed data. Weldings at least 2 m from the transducer must be ground. Water overboard lines, inlets and outlets influence the waterflow. Therefore the transducer MUST BE installed at.least 2m forward of such openings. The transducer must always remain submerged, even when there is a minimum of draught in heavy seas. Sufficient headroom must be available at the transducer position to allow for its fitting and removal (see the section for installing the appropriate bottom parts) . SAL-840 Manual 62.2 BOUNDARY LAYER A moving ships hull tends to drag a layer of water with it, caus- ing a boundary region around the hull. The water speed at the hull is almost the same as the ship's speed, so that the relative water speed is almost zero. With successive water layers the relative water speed increases until, at the boundary edge, the relative water speed becomes equal to the ship's speed. The thickness of this boundary layer is not uniform around the ship. It can range from a few nm near the bow to nearly a metre at the stern of a large ship. The relative speed of the successive water layers is not proportional to the distance from the hull, but follows a curve as shown in Fig. 2.1. Ships hull CLLLLLLth Shins speed ¥ Next to hull: Rel. water speed = 0 Inside Boundary Layer ft 1/2 boundary Lave: Rel. water speed = 90/ | Wa Rel. ° water speed At boundary layer edg Outside boundary layer Rel. water speed = 101 (Rel. water speed = U) Fre. 2.1 Bounoary Laver SpeeD DrsTRIBUTION 2.3 NOISE AND CAVITATION The transducer operates on the acoustic principle and is therefore susceptible to interference from acoustic (noise) sources. In particular, the transducer should be fitted well away from the propeller and other sources of noice in order to minimize the effects of noice, vibration and cavitation. 2.4 OTHER FACTORS AFFECTING ACOUSTIC LOGS The transducer and the electronic unit are designed to respond prin- cipally to the acoustic reflections denoting the speed of the ship. In sone situations however, the system can respond to false acoustic signals which could arise under adverse conditions. Ali makes and SAL-840 Manual 7types of acoustic logs are affected in a similar way. 2.5 INSTALLATION OF BOTTOM PARTS Detailed instructions for installing the different bottom parts are given in the following sections. Refer to the section covering your particular application! The bottom flange which is to be welded into the ship's hull is of the same size whether from single or double bottom parts. The bottom flange dimensions are shown in Fig. 2.2 below. Tank top DOUBLE BOTTOM SINGLE BOTTOM Fro. 2.2 BoTTom FLANGES SAL-840 Manual 8SECTION 3 MOUNTING SET SINGLE BOTTOM WITH SEA VALVE (MSSBSV) The components of the MSSBSV assembly are supplied in kit form to be assembled onboard the ship. Before starting the assembling, check the contents of the kit against the packing list. Figs. 3.1 and 3.2 shew how the components fit together. The component assembly with its principal dimensions is shown in Fig. 3.3. INTERNAL WATER SEAL Top COVER SCREW HES. 16x60 NUTS MLHGHE6 ——— sasnere oe f, SEA VALUE el A s— NUTS MLMGHL6 MOUNTING SUPPORT =| =—=—-————>—___easuet ' sTuo i : eC SHIPS HULL : et ING GUIDE RING ———— $= e a SCREW FS 10x30 Fre. 3.1 MSSBSV AssemsLy Diagram SAL-840 Manual 9TUBE BRACKET y assent CLAMP SCREWS (TO REAR) TRANSDUCER CABLE CABLE GLAND WITH O-RING 27.4 x 00-90300-09 RING 03-30179-00 FLAT FACES TOWARDS STARBOARD WING NUT TRANSOUCER CONNECTING (Tr sa-ssnsecon lois Pee Ss 28 nvr FO _7ictsesecan “\uASHER 71-19835-00 O-RING _ 00-00730-87 | 34.5 X 3.53 L eee | enya nEEEEEEEEEESSEE | Fie. 3.2 MSSBSV TRANSDUCER SAL-840 Manual 10Free space to ceiling for mounting of transducer: = u+i000 71-14384-00 73-19837-00 \ 21-22016-00 cra 350 90- 00300-09 71~-19839-00 71-22 004-00 M6S_16x60 MéM 16 71-22049-00 Gaskets PS 16x60 M6M 16 Fre. 3.3 MSSBSV - MAIN DIMENSIONS SAL-840 Manual Merete 90-02104-95 21-22002-00 i 71-22115-00 TRU-1-4 71-22000-00 Mat: SIS 21723.1 SEA VALVE ASSEMBLY (Fic. 3.3) the bottom flange must first be welded into a hole cut out in the ship's botten. 1. cut a circular hole (diameter 220 mm +10 -0 mm) at the se~ lected transducer position. 2. Weld the bottom flange into the hole; ensure that it is positioned in such a way that the sea valve can be fitted without obstruction. Notes: a. Welding work should be carried out by a welder holding qualifications approved by the applicable classification society. b. IT IS IMPORTANT that the outer (bottom) surface of the flange is flush with the hull. The welded joint must be ground smooth and flush with the hull. There must not be any sharp edges which could cause interference with the wa~ terflow over the transducer. c. The vertical orientation of the mounting set must be within the admitted tolerances (Fig.3.4)- 3 Fit the zinc ring and the guide ring into the base of the bottom flange and secure with four FS10 x 30 screws. 4 Screw ten PS16 x 60 studs into the top of the bottom flange. 5. Apply sealing compound to both sides of gasket 1 and place it on the flange surface. Fit the sea valve over the studs, align it correctly with the flange and secure it with the Mié nuts and lockouts. 6 Apply sealing compound to both sides of gasket 2 and place it on top of the sea valve. Install the transducer and the valve top. Secure with M16 screws. See section 3.2. SAL-840 Manual 12An SAL-840 Manual mex Fre. 3.43.2 TRANSDUCER INSTALLATION ansducer assembly consists of the transducer with cable,which fitted to the connecting tube supplied to suit the sea valve ation. Assemble the transducer as follows: 1 The valve top shall be removed from the clesed sea valve. 2. Push the connecting tube through the valve top (see Fig. 2.2) 3 Assenkle the nut, locking washer, washer and O-ring onto the connecting tube in the order shown in Fig. 3.2. Note: rt is important that the connecting tube is inserted through the top of the valve top. If inserted through the botton, the water seal is damaged. a Push the transducer cable through the connecting tube and reneve the transducer transport protection piece. 5. Assenble the connecting tuke and transducer, checking car: ly that the slot in the connecting tube is engaged corr in the transducer. ful- ctly &. Tighten the nut to secure the transducer to the connecting re. e the cable cutlet at the upper end of the connecting tube @ giand around the cable. Vs Secu and a Push the transducer assembly ¢ Secure the transducer tenporaril coupling. letely into the valve ter. y by tightening the cluzch Lower the valve top and transducer assembly carefully cnto the sea valve. ENSURE that the transducer does not touch the valve bedy or the valve slide. 10, Fit the valve top to the sea valve using the M26 x 60 screvs and Mlé nuts and lecknuts. Note: The final stage of the installation procedure, steps 11 to 13, should be carried out by an authcrized commissioning engineer whe will check the transducer assembly before installing it. This can be done while the ship is in dry dock. 11. Open the sea valve, loosen the clutch coupling and carefully push the transducer assembly down until resistance is felt (cause@ by the chamfered guide ring). Continue pushing down while turning the assembly until a definite stop is reached after a further 15 mm. Turn and push the assembly again to en- SAL-840 Manual 1412. 13. sure that it is correctly seated at its lowest position. IT IS IMPORTANT THAT THE TRANSDUCER IS CORRECTLY SEATED. Check this from outside the hull if possible. Unscrew completely the wing nut on the clutch coupling and push the coupling down and into the fork on the valve top. Fully tighten the coupling to the connecting tube and TIGHTEN the wing nut. Loosen the fork clamp around the valve top and turn the top assembly so that the flat on the connection tube faces to starboard within ~/-2 degrees. Use a straight guide bar held against the flat to facilitate this (see Fig. 3.5). Tighten the fork clamp at this position. FWD GUIDE BAR (HELD AGAINST FLAT : ON TRANSDUCER TUBE) Tipe (uteueo FROM TOP) / + STARBOARD AFT Fre. 3.5 ORIENTATION OF TRANSDUCER CONNECTING TUBE SAL-840 Manual 15SECTION 4 MOUNTING SET DOUBLE BOTTOM WITH SEA VALVE (MSDBSV) The components of the MSDBSV assembly are supplied in kit form to be assembled onboard the ship. Before starting the assembling, check the contents of the kit against the packing list! To complete the asssembly, the Intermediate Tube and Blanking Plate MUST BE MANUFACTURED BY THE SHIPYARD and welded to the valve flange and the bottom flange. Figs. 4.1 and 3.2 show how the components fit together. The compo- nent assembly with its principal dimensions is shown in Fig. 4.2. perenne OSTER Sea roe cover sone nes, | sees “**—_—§ I —_— vaue cover Mie cases? sen valve wwrs noms asker 2 FE loxco cn VALUE FLANGE suaming poate | Tame 109 anrenneprare CEniBoano Bu SHIPS MULL, BOTTOM FLANGE GRIN veud“AccuRaTeLy —=—s 2 FLUSH UITH MULL Cs at tno A A ScneY FS 10x30 Fie 4.1 MSDBSV Sea Vatve AssempLy DIAGRAM SAL-840 Manual 16SELL agt7s,"° 21rts304-00 transducer: eeseusoe=02 Ez vs1000 2i-49837-00 7 71-29039-Kx 21-22004-00 és 16x60 ner 16 me 21-22049-00 Jakes PS 16x60 Steel cube 0 127%98. 74-22115-00 [nuSe-ausrseete bee Taina ‘suoplied by vard \ p1-22001-00 22-22000-00 aT 00-02104-95 Mate SIs 2172 ae [71-22002-00 Fre. 4.2 MSDBSV MounTrNG Set DousLe Bottom SEA VaLve SAL-840 Manual v74.1 INTERMEDIATE TUBE AND BLANKING PLATE MANUFACTURE Te Make the intermediate tube according to the dimensions shown in Fig. 4.3. The material used should be steel, type SIS 2172- 03 or equivalent. 2. Use Table 4:1 to chcose the required intermediate tube length, the part number and the length of the transducer connecting tube. [ is Fie. 4.3 Fre. 4.4 SAL-840 Manual 18(TANK HEIGHT INTERMEDIATE | TRANSDUCER CONNECTING TUBE : oP (mm) TUBE |(see Fig.1.2) | LENGTH (mm) | LENGTH (mm)! PART.NO. ibelow 700 | 800 1300 71-19539-08 I 701 - 900 | 1000 1500 71-19839-10 | | 901 - 1100 | 1200 1700 71-19839-12 | J1102 - 1300 1400 1900 71-29839-14 ! '1301 - 1500 | 1600 2100 71-19839-16 { l1501 - 1700 1800 2300 71-19839-18 j 1701 - 1900 2000 2500 71-19839-20 | 1902 - 2100 2200 2700 71-19839-22 i }2101 - 2300 | 2400 2900 | 71-19839-24 ' {2301 - 2500 2600 3100 71-19839-26 \2502 - 2700 | 2800 3300 71-19839-28 i 12701 - 2900 3000 3500 71-19839-30 | |2902 - 3100 | 3200 3700 71-19839-32 i 101 - 3300 3400 3900 71-19839-34 ; !3301 - 3500 3600 4100 71-19839-36 i {3501 - 3700 3800 4300 71-19839-38 jpror = 3900 | doae | tao] riaaseascee | TasLe 4:1 INTERMEDIATE TUBE AND TRANSDUCER CONNECTING TUBE LENGTHS MOUNTING SUPPORT Fic. 4,5 Wevpine INTERMEDIATE TuBE SAL-840 Manual 19 ;———._ FLANGE BLANKING PLATE oo INTERMEDIATE TUBE4.2 SEA VALVE ASSEMBLY ‘The bottom flange must first be welded into a hole cut in the ship's bottom. 1. 10. cut a circular hole (diameter 220 mm +10 -0 mm) at the se- lected transducer position. cut a circular hole (diameter 220-240 mm) in the tank top, vertically above the transducer position (see Fig. 4.1 page 15). Weld the intermediate tube to the bottom flange. Insert the bottom flange through the hole in the tank top and locate it into the hole in the hull. Weld the bottom flange into the hole; ensure that it is positioned so that the Sea valve can be fitted without obstruc- tion. Notes: a. Welding work should be carried out by a welder holding qualifications approved by the applicable classifica tion society. b. IT IS IMPORTANT that the outer (bottom) surface of the flange is flush with the hull. The welded joint must be ground smooth and flush with the hull. There must be no sharp edges which cculd cause interference with the waterflow over the transducer. c. The vertical orientation of the mounting set must be within admitted tolerances (Fig. 3.4). Weld the blanking plate first to the tank top and then to the intermediate tube as shown in Fig. 4.1 (page 15). Fit the zinc ring and the guide ring into the base of the botton flange and secure with four FS10 x 30 screws (Fig. 4.1) Screw ten PS16 x 60 studs into the top of the valve flange. Apply sealing compound to both sides of gasket 1, and place it on the flange surface. Fit the sea valve over the studs, align it correctly with the flange and secure it with the M16 nuts and locknuts. Apply sealing compound to both sides of gasket 2 and place it on top of the sea valve. Install the transducer and valve top. Secure with M16 screws. See section 4.3. SAL-840 Manual 204.3 TRANSDUCER INSTALLATION The transducer assembly consists of the transducer with cable, which shall be fitted to the connecting tube supplied to suit the sea valve installation. Assemble the transducer as follows: a. The valve top shall be removed from the closed sea valve. 2. Push the connecting tube through the valve top (see Fig. 4.2). 3 Assemble the nut, locking washer, washer and O-ring onto the connecting tube in the order shown in Fig. 3.2. Note: It is important that the connecting tube is inserted through the top of the vaive top. If inserted through the bottom, the water seal is danaged. 4 Push the transducer cable through the connecting tube and remove the transducer transport protection piece. 5. Assemble the connecting tube and transducer, checking careful~ ly that the slot in the connecting tube is engaged correctly in the transducer. 6 Tighten the nut to secure the transducer to the connecting tube. 7. Secure the cable outlet at the upper end of the connecting tube and tighten the gland around the cable. 8. Push the transducer assembly completely into the valve top. Secure the transducer temporarily by tightening the clutch coupling. 9%. Lower the valve top and transducer assembly carefully onto the sea valve. ENSURE that the transducer does not touch the valve body or the valve slide. 10, Fit the valve top to the sea valve using the M16 x 60 screws and M16 nuts and locknuts. Note: The final stage of the installation procedure, steps 11 to 13, should be carried out by an authorized commissioning engineer who will check the transducer assembly before installing it. This can be done while the ship is in dry dock. 11. Open the sea valve, loosen the clutch coupling and carefully push the transducer assembly down until resistance is felt (caused by the chamfered guide ring). Continue pushing down while turning the assembly until a definite stop is reached after a further 15 mm. Turn and push the assembly again to en- SAL-840 Manual 2112. 13. sure that it is correctly seated at its lowest position. IT IS IMPORTANT THAT THE TRANSDUCER IS CORRECTLY SEATED.Check this from outside the hull if possible. Unscrew completely the wing nut on the clutch coupling and push the coupling down and into the fork on the valve top. Fully tighten the coupling to the connecting tube and TIGHTEN the wing nut. Loosen the fork clamp around the valve top and turn the top assembly so that the flat on the connection tube faces to starboard within +/-2 degrees. Use a straight guide bar held against the flat to facilitate this (see Fig. 4.6). Tighten the fork clamp at this position. FWD GUIDE BAR (HELO AGAINST FLAT ON TRANSDUCER TUBE) Woe coreveo FROH TOP) » STARBOARD AFT Fro 4.6 ORZENTATION OF TRANSDUCER CONNECTING TUBE SAL-840 Manual 22SECTION 5 ELECTRONIC UNIT AND CABLES 5.1 ELECTRONIC UNIT : The electronic unit is designed for surface bulkhead mounting and has a gland plate at the bottom for cable entry. The electronic unit is splash proof and suitable for indoor locations; it MUST NOT be fitted at any position exposed to water. The dimensions and mounting details for the electronic unit are given in Figs. 5.1 and 5.2 while the electrical connections are given in Fig. 5.3. The electronic unit must be fitted at a suitable position within the maximum length of the transducer cable (30 m) making due allowance for the run of this cable. Note: ‘The transducer cable MUSTNOT be shortened nor must extra cable be added (efficiency of the electrical matching). Any excess cable should be coiled and tied up neatly near the transducer. INSTALLATION OF THE ELECTRONIC UNIT Loosen the four screws holding the chassis to the case and loosen the earth link screw (at the chassis link end). Disconnect the earth link. Remove the complete chassis by lifting it slightly upwards and out of the case. The case mounting holes are fitted with waterproof rubber grommets. These MUST NOT be removed. Their centres are penetrated to accept the M6 mounting screws. Mount the case to the bulkhead using the Mé screws and cup washers. Place the chassis into the case, reconnect the earth link and tighten the chassis mounting screws. When connecting the transducer cable the shield plate mounted above terminals 41-45 has to be removed. It should be refitted after completed connection. CABLING Cabling between electronic unit, LEB, display units and radars etc is carried out by use of a 0.5 square mm normal copper shielded ships cable. GROUNDING Cable shield of the 19 core cable between ELC-24-1 and LEB-1-1 to be connected to earth in ELC-24-1 only. Cable shield of the cables between LEB-1-1 and various instrument to be connected to earth in LEB-1-1 only. Cabinets for ELC and LEB must have solid ground connections. MAINS INPUT The mains supply requires a separate normal 1.5 square mm ship's cable. SAL-840 Manual 23Weight: 15 ks Enolosure protection: 1P-54 Fre. 5.1 ELC-24 ELECTRONIC UNIT - MAIN DIMENSIONS SAL-840 Manual 24Case Mounting Arrangement | BOTTOM TRACK | ae V\cuo cite! | \ Washer constant | jubber | Selector | Svonnee, Satish, | waTeR TRACK ca re ees 4 Earth Tons (Chassis Mounting pei Fro. 5.2 Cassis Mountine DeTazLs 25 SAL-840 Manualase song |— warner § ar ww & zB * mas 3 8] [crs mor £ 5 creo & 3 b vaseves # 8 worse ¥ g ‘aaa é EE Fea ad =| eae Dan ~}qoasionana-30 mons Av 138) 14D Sunatvs wince snain0 320510 J tesie0 a2asi0 fe] sassy ov3a8 4 Sosa s J suns saereenr = sien wes S| creo or tie 2] M0} en aren “| wrtooe Sf eae] snare sae =| creme snasno 220180 ri 85 J wow wre sf Fie. 5.3 26 SAL~840 Manual5.2 LEB - LOG EXTENSION BOX See Figs. 5.4, 5.5, 5.6 and 5.7. The log extension box is used as a buffer unit between the electronic unit and the indicators and as an interface between the log system and other users. A total number of eight output pulses of 200 or 400 P/nm for true or relative speed are available for other users such as radars etc. The LEB consists of a power supply, three terminal blocks and a PCB ULEB. The input signal for LEB is 20000 p/nm from the log systen. This signal is then divided by the electronic circuit ULEB to 200/ 400 p/n. With four (4) dip selector switches the following can be chosen: a) Relative (W/T) or True (B/T) input signal from ELC. b) Relative or True outputs to other users; 200 or 400 pulses/nn. Note: Total number of outputs for other users is eight (a). Any of these outputs can be chosen for W/T or B/T. only one switch can be activated at the same time in the four dips. The output functions, optccoupler or potential free relay contact can be chosen via the eight (8) selector switches. The optocoupler can be loaded max 30 VDC 100 mA. See fig. 5 The standard settings of the switches for the ULEB PCB are: - Dip switch 1 and 2 set to 72, 12, True speed 200 p/nm. - Dip switch 3 and 4 set to R2, R2, Relative speed 200 p/nn. - Switches 1 to 8, all set for relay output. The LEB can be expanded with various types of additional outputs and retransmission units, e.g. 20000 p/nm buffer units and 0.1 V/knot analogue units. SAL-840 Manual 27Fic. 5.4 seuaiins 212006 TAEIIO yay Seuss 20;22N5 nduy Eaaa (al t were o1d0 28 SAL-840 ManualSecline screw Secling screw Moin dimensions, | | ! | | i ° | fee| | a ; | choles $6 30_ Rubber bushing Weight 28x35 LEB-1-1 Enclosure protection: 1 P-64 eee : Fig. 5.5 Log Extension Box SAL-840 Manual 29Fuse Fuse (Fusey Te 30 6 30) 27 ailpasvac [eri asvac [oaj}aauac [26 32 [2] 32! 25 33 63 33 24 aaj} aeuac [eal}aauac [94] aavac [2a [35 | 6 95 22 96 }) signa [661] signa | 96]) signat [24 a7]} zero” [eypzere [92] zero [20 [zej 7S Ga] RS sets Tas a3 69 9 is ball tapers fal fepecd Fra Tdeoeh 75 ary 7 fnon} *S i6 (a2) 72) y loz) y 15 Gi}} Ysveed [Fah “sveed [roxy ‘deoth [ra aa TS [pay © frog) TS fa [as [2st [aes fh as} ory [761 -5 xs fron 0 fast faz) TS faa fuoz} "ao aah 178) power [1osuerack in 9) ee PEE’ pores Te [e0)) fvacruse) [7 chest é 19} 3 4 3 2 see Fis, A 1 2007400pp/an RS/TS 200/400pp/nm RS/TS 200/400pp/nm as/s 200/400pp/nm Rs/Ts 2007400pp/nm Rs/Ts. 200/74000D/nn RS/TS 20074000p/nm Rs/Ts 2007400pp/nm RS/TS fepeed RS Taf. Signal zero RS fspeed TS Signal zero TS 19 aC QOCOOE QOOGGG use l1l0¥. Ee i199 110-— Fic. 5.6 LEB 1-1 Log Extensron Box SAL-840 Manual 30 fis. ATRUE RELATIVE Speed input terminals Sees 2F AS Dividing 17100 Circuits *—~pce Layours T4 switch setting corresponds to 400 pulses T2 switch setting gorresponds to R4 switch setting corresponds to 400 pulses R2 switch setting gorresponds to 200 pulses 200 pulses TRUE SPEED RELATIVE SPEED Remarks: Input selector switch (DIP 4 to DIP 4) —> Only one switch can be activated. up: pto coupler ourput "open collector”. Down: Potential free Doun relay contact. Observe the current direction with opto coupler Max 30 VDC 100 ma Output selector switch (SW i to SW 8) up Channel 2 outputs < iz) * al (RE 1 to RE 4) J : 1104) 14¢4) Frey Channel 3 Terminal 7) 106+) 18+) 1804) number For 16a Tespective ourput, Channel 4 8 9 This picture shows 294) 22C+) 2000 aa Channel 1 Fre. 5.7 Switch SETTING DIAGRAM SAL~840 Manual 315.3 DISPLAY UNITS Different displays can be connected to the electronic unit, e.g.: a) Analogue Speed Displays b) Digital Displays for speed, distance and trip ¢) Digital Displays for speed dj) Digital Displays for depth Notet Max 10 digital displays may be connected to one (1) LEB unit. If more displays are needed the LEB can be expanded. ‘The LEB gives the 48 VAC power source to the digital displays. The speed signal (20000 p/nm) and power (48 VAC) can be run in a common cable to each display. See Fig. 5.8, 5.9 and 5.10. bh 144 oe as : siara-a or BS three 144 nn 202 @ = t Sa Panet curour | R92 05 4-150 nw ——4, Ty Wastes start-3 144 nm ¢ h-———150 mm ———) Pane curoue, 4 144 nm gta-2-2 Stas 3-38 b= 196 mm —H 144 nn pial Fe k— 100 mm—-» Panel cutout Frc. 5.8 ANALOGUE SPEED INDICATORS SAL-840 Manual 32p$——— 144 me € SAL e 12.37! oD ‘Speed Display with Bottoms Water Track Indication $164 en Fc ile SAL e 12.37 Ot Que 412.3} © a canes MSS with Botton/Water Track ep) 144 mn 4 7 6 SAL é [__2507| ae sn. Q., 6 € ie Deoth Display Fic. 5.9 DD-1-1 UnrversaL DreztaL Inprcators SAL-840 Manual 33"A QO w& es YY @ Fre. 5.10 LSS-2-1 Loc Serector Swrtcu SAL-840 Manual 345.4 CABLE CONNECTIONS Cabling Connection Diagram, see fig. 5.12. ° abling to Display Units, Radars etc. Cabling te user units should be carried cut in accordance with normal shigs practice. The cables are to be minimum 0.5 square mm, max. : 2.5 square mn shielded ships cable. The shield of the 19 core cable between ELC anc LED should be connected to ground in the ELC- unit only. The cables retween the LEB-unit and displays or other users should be connected to the ground bar in the LEB-unit only. DO NOT con: the screens to ground at the user end. Note Make sure the cabinettes of LEB and ELC are connected to solid ground. SAL-840 Manual 351 200/00 Gein RIS "as 1490 Priam RMS 2001690 pInen SITS “aprea, RS. 200100 FRIEN RTS 200140 pin TSA Mpeea, RS 200/400 pine TSS 2001400 Priam TSS, Slash, TS-in. “1-3, Rind, Rsie ov ne te als] a 334 Tse PEEP EPEEEE! . ‘Ov aon 700 F/B tome ew civ 200 100 110 Wan Yemen ¢| coon 3 3 Tdeseaous sige SAL-84 ; Cable connection eee J: Morel cope shi diagram ‘here cobie, min ase! Yoage supply eaties: Sats ma? SALAS?SECTION 6 COMMISSIONING AND TESTING This section describes the procedure required to bring the equip- ment into operation after the installation. It includes the speed calibration procedure and the equipment test functions. 6.1 INITIAL CHECKS ELECTRONIC UNIT i Check that all cables are correctly connected and properly clamped in their cable glands. Check that all cable shields are correctly conencted to ground. Check that ELC and LEB cabinets have solid ground connection. 2. Check that the mains fuses are intact. Fuse numbers and ratings are given below. FUSE No. RATING SUPPLY Fei 2 Amp. 220 VAC F-2 1 Amp. 110 VAC F-3 1 Amp. 0 vac TRANSDUCER a. Check that there are sufficient headroom and length of cable to allow the transducer to be removed from the bottom parts assenbly. 2 Check the cable run of the transducer cable. 3. Check that the transducer is lowered to a firm stop. 4 Check the orientation of the transducer; the flat mark must face towards starboard. 5 Check that there is no water leakage. 6.2 TEST - RELATIVE SPEED (W/T) The indicators and test points in the electronic unit are shown in Fig. 6.1 and described in Tables 6:1 to 6:4 below. Most of these are for use by the manufacturer during production testing. The normal status of the indicator LEDs is described in the Tables. Any changes in these indicates a faulty condition. Pls contact Consilium Marine for advice. le After installation, the thumbwheel switch position 35 to be selected. 2. Carry out system reset by short circuit the reset test pin to SAL-840 Manual 37the zero test pin for a few seconds. ‘The log is now in simulation mode and all displays and outputs ate approximately 10 knots. for other users shall indic: Switch position 34 to be selected Repeat 2, point 2. 20 knots is simulated. Return the thumbwheel switch to 00. Repeat 2, point 2. Note: Above tests are useful for testing the computer displays and other outputs. Sea calibration. See section 6.4 Indicator Normal status OK UNLIT WATCHDOG UNLIT (when lit, indica tes computer fault) A/D TRIGG LIT (when unlit, indica- tes triggering fault) TaBLe 6:1 ‘Thumbwheel Selector Position Function 00 to 29 50 to 99 30 to 49 34 35 For Speed Calibration For Speed Calibration Manufacturer's Test Programs Simulated Speed 20 knots Simulated Speed 10 knots TABLE 6:2 SAL-840 Manual 38 cabling,Indicator Normal status COARSE 1 These indicators light COARSE 2 (in sequence) when the LoW SPEED ship is at zero speed or changes speed rapidly FINE Lit when the ship is at constant speed, or changes speed slowly Tape 6:3 Test Point Function RESET Link RESET testpin to ov ov to reset system after each simulated speed ‘THUMBWHEEL For manufacturer's MODE service use +5V Tape 6:4 6.3 TEST - TRUE SPEED (B/T) The indicators and test points in the electronic unit are shown in Fig. 6.2 and described in Tables 5 to 8 below. Most of these are for use by the manufacturer during production testing. The normal status of the indicator LEDs is described in the Tables. Any changes in these indicates a faulty condition. Please contact Consiliun Marine for advice. 1. After installation, the thumbwheel switch position 44 to be selected. 2. carry out system reset by short circuit the reset test pin to the zero test pin for a few seconds. depth. SAL-840 Manual ‘The log is now in simulation mode and all displays and outputs for other users shall indicate approximately 10 knots, 100 m10. 1. 12. Switch position 45 to be selected Repeat 2. 20 knots, 300 m depth, is simulated Switch position 43 to be selected Repeat 2. 5 knots astern, 3 m depth is simulated. Return the thumbwheel switch to 00 Repeat 2. Note: Above tests are useful for testing the computer, cabling, displays and other outputs. Sea calibration. See section 6.4. Indicator Nornal Status si Transducer signal - Channel 1 s2 Transducer signal - Channel 2 TREL Command signal TMIT Transmit command signal Sa Signal synchronized with the transmit pulses. This| signal is to be used for checking signals synchronized to transmit/receiver cycle. TABLE 6:5 SAL-840 Manual 40SAL~840 Manual \Thumb wheel Water track Tracking In range TEST POINT selector Function Position loo to 40 For speed calibration 60 to 99 For speed calibration 41 to 59 Manufactures test prograns 43 Simulated speed 5 knots astern - depth 3 m 44 Simulated speed 10 knots ahead ~ depth 100 m 45 Simulated speed 20 knots ahead - depth 300 m TasLe 6:6 Indicator Normal Status Ahead Lit at Ahead direction Bottom Lit at speed with bottom track Lit in water track mode or manual override by the log selector switch Lit when log is in follow mode. Lit when the depth is more than 3 m but less than 300 m and bottom echo is tracked Test point for the Silent period in transmit/ Sahoo TABLE 6:7 4 [receive cycle 1rest point Function Reset, Link Reset to 0 V to reset system after each simulated speed used To Thumb wheel For manufacturers service use only - a2 v Electric system voltages ho sv + a2 Vv TasLe 6:8 6.4 SPEED CALIBRATION Speed calibration of the log is performed by setting the Thunb wheel Selector switches (see Fig. 6.1 and 6.2) after a speed trial. The log is delivered with the thumbwheel settings at nominal 00. These should normally not be changed. However, if an inaccuracy is noted, the following speed calibration procedures should be carried out. Sea Trial Procedure - Bottom Track The systen is calibrated by sailing a known distance in both directions (Run 1 and Run 2) in calm waters with depth less than 300 m so that the bottom track mode is used. The true speed, VT, is then calculated by measuring the time spent to sail the known distance. The logged speed, VL, is calculated by measuring the time and the distance accumulated by the distance display. (This method is far more accurate than reading the speed directly from the speed display). SAL-840 Manual 42Calibration calculate the Speed Error Factor (CF) as follows: VE(Run 1) + VL (Run 2) vi(Run 1) + VT (Run 2) where © VL = Logged Speed VT = True speed Multiply this factor by the factory setting value (xx) and set the bottom track thumbwheel selector switch to this new value (nearest figure). If factory setting is (00), set CF. The log is now calibrated in Bottom Track Mode. Example If the true speed, Run 1 = 16.0 knots + Run 2 = 16.1 knots and the logged speed Run 1 = 15.7 knots + Run 2 = 15.8 knots, then: 15.7 + 15.8 - 0.98 16.0 + 16.2 Multiply 0.98 x XX (Old thumbwheel setting) = XX. You get the new setting for the calibration switch (thumbwheel selector switch). Sea Trial Procedure ~ water Track The method is the same as for B/T. Use W/T thumbwheel switches. Depth shall exceed 3 n. Note: sea trial can be carried out simultaneously for water track and bottom track. 6.5 ADDITIONAL TESTS Analogue Speed outputs The SAL-840 analogue speed outputs can be conveniently monitored by connecting ELC terminals 18 and 6 for W/T or 58 and 46 for B/ T to a digital voltmeter (DVM). The output is a DC voltage of 0.1 V per knot. (For example: a DVM unit reading of 1.74 V indicates a speed of 17.4 knots) SAL-840 Manual 43ox TIME CONSTANT SELECTOR SWITCH waTc# 006 Tape 1 TIME constant a0 TRICE SELECTOR pnsition | Time constant stata cep estate ‘SELECTOR " tape 2 CO) | tse conrse 1 T 3 see (Nominal cOnRSE 2 Dosieion) Deu green FINE Reser ov THUMBWHEEL, oD +80 +12 TABLE 3 10 see FF] ) 20 se TABLE 4 Lig when transducer Transmics pulses fe CHANNEL — CHANNEL FLacnes ate “ate we oie ft _tecteD 1norcaToRS oie SPEAR IOOE ER TARO TITAN ANY Fic. 6.1 Inprcators, TESTPOINTS AND Fuses - WATER TRACK SAL-840 Manual 442 Time coNstaNT | mit ss : ON | TIME constaNT THUMBUHEEL [10 eee notron warER TRACK: TRACKING: IN RANGE: 20 see Sano i 1 anno 1 ‘ev J +30 | 1 w 1 —— | i ‘ orton teack WaTER TRACK. Flashes! se e0te Lit wnen transducer Transnits pulses Fissnes | FLaches e200 ‘sedee CHANNEL. CHARNEL 2 Ta Frc. 6.2 Inprcators, TESTPOINTS AND Fuses - BOTTOM TRACK SAL-840 Manual 45SECTION 7 PRINCIPLE OF OPERATION/FUNCTION 71 PRINCIPLE OF OPERATION See Fig. 7.1 The transducer comprises two pairs of separate acoustic elements which are located at defined distances from each other.The transducer is positioned parallel to the ship's longitudinal axis and is orientated so that one element of the transducer is positioned forward of the other. Each element transmits a beam of sound at vertical angles downwards from the ship's hull. In water track a frequency of 4 MHz is generated and transmitted in short pulses. Between the transmitter pulses the elements are changing to receiving mode. The timing of receive mode is designed in such a way that the receiver responds to any reflections froma depth approximately 120 mm below the hull. Particles or air bubbles in the water at this depth will reflect the transmitted energy back to the elements in receiving mode, first to the fwd element and then to the aft element. The time difference between the two echo signals is used to calculate the speed of the ship. In bottom track a frequency of 150 kHz is used and a pulsed beam is transmitted to the sea-bed down to a maximum depth of 300 m. The sea- bed reflects the energy and by using the correlation technique, the ship's speed is calculated from the time difference between echoes received by the two elements in receiving mode. ‘The time delay T is dependent on the distance between the two receiver elements and the speed of the ship. s ie TS v where S = the known distance between the elements V = the speed of the ship. After amplification the reflected signals are fed to a micro com- puter which calculates the time delay T by correlating the echo signals. When T is known, the speed V is also known. Interface circuits transmit the signal to displays, radars etc. As both true and relative speed functions are used, it is also possible to calculate the water current. The depth is calculated by measuring the time lapse between transmitted and received pulses from the sea~ bed. SAL~840 Manual 46Weter treek (Relative speed) ——Eoatter track (irue speed SAL~ 84 Principle of operction Fre. 7.1 SAL-840 Manual 477.2 PRINCIPLE OF FUNCTION ‘The SAL~840 log system has two measuring functions, bottom track and water track, which are CONTINOUSLY MEASURING SPEED INDEPENDENTLY OF EACH OTHER. ‘The bottom track function is divided into 5 functional units: See fig. 7.2. 1. Transmitter/receiver unit 2. ‘Transmitter/receiver interface unit 3 Calculator unit 4a Port/timer unit 5. T/O (in/out) unit 1 Transmitter/receiver unit The unit consists of: a) Power amplifier b) Two identical receiver channels c) Circuits for amplification of receiver signals The power amplifier generates the transmitter pulses. The carrier frequency and the transmit command are received from the interface unit and the calculation unit. 2 Transmitter/receiver interface unit The unit consists of circuits for communication between the transmitter/receiver unit, calculator unit and the port/timer unit as follows: a) Ocillator for carrier frequence 150 KHz b) Latch port D works as an out-port for AGC signals which guide the digital amplification in the receiver amplifier. c) Sample and hold circuit, which generates control pulses for receiver amplifier outputs. a) D/A converter which is controlling the analog amplification in the receiver amplifier. e) A/D converters which are digitalizing the sampled receiver signals from the two (2) receiver channels. 3 Calculator unit The unit consists of: a) CPU b) Address latch c) Address decoder a) APU (Aritmetic Processing Unit) which runs the aritmetic operations e) EPROM and RAM memories ‘The calculator unit also runs the transmitter/receiver command, the receiver amplification and calculates the depth and the speed. SAL-840 Manual 484. Port/Timer unit The unit communicates with the transmitter/receiver, transmitter/ receiver interface unit, I/O unit and the thumbwheel PCB. The signals TREL and TMIT are controlling the interface and transmitter/receiver unit. Signal TREL is a sampling command. The TMIT signal is controlling the transmitter. The time constant for speed calcula- tion is set with the time control switch. The unit also reads the thumbwheel setting as well as generates the test signals Sa, h9, "in range", "ahead" and "tracking". 5. 1/0 (in/out) unit The unit consists of: a) Buffer circuits for the digital signals b) Low pass filter for the analog output signals to indicators and other consumers. The Water Track function is divided into three functional parts: See fig. 7.3. als Transnitter/receiver unit 2. Calculator unit 3. Interface unit 1. Transmitter/receiver unit The unit consists of: a) Power amplifier b) Two identical receiver channels. ¢) Circuits for amplification and distribution of receiver signals 2. Calculator unit The unit consists of: a) A/D converters b) EPROM RAM memory ¢) Three (3) timers a) APU e) CPU : Interface unit The unit consists of: a) Thumbwheel switch for log calibration b) Frequence dividers, F/A converter and output buffers e) Testpoint and LED indications The interface unit converts the output signals from CPU to indicators, radars and other consumers. SAL-840 Manual 49wn-ont wn-o49 canes ou — Fai pow a algae swonoot neee ear aTaT TIA 980 won sarees, F1G.6.2 Blockdiagram for bottom track function2f “I3NNUHD YGATZ3a st ef Neve BTS | Tt TANNYHD 4LINA SOINOULOATA SODWI-WS 40 WWeDU YGATZO3Y a D078 Fic. 7.3 Brock DraGRAM FOR THE WATER TRACK FUNCTION 51 SAL-840 ManualSECTION 8 SPARE PARTS AND ACCESSORIES - OPTIONAL Part No. Description 71-21937-00 DD-1-1 Speed, Distance and Depth Indicator 71-22112-00 PCB unit complete Transducer with cable Mounting set service kit User‘s manval Connecting tube MSSBSV 71-21990-00 MSDBSV xx- Depends on length CONSUMABLE SPARES: 71-21435-02 Fuse 1A delayed, 5x20 mm, 4 pes 71-21435-02 Bulb Philips 13829, 2 pcs SAL-840 Manual 52SECTION 9 MAINTENANCE 9.1 USER PRECAUTIONS It is recommended that the log is kept permanently switched on even when not required for use. The ultrasonic energy through the transducer is effectively freventing it from fouling with sea growths. The transducer elements and bottom guide ring must NEVER be painted as this can seriously impair the operation of the transducer. Whenever the ship is dry docked, it is recommended that the transducer elements are inspected. 9.2 MAINTENANCE OF BOTTOM PARTS Each bottom part assembly incorporates a zinc ring which acts as a sacrificial anode to prevent corrosion of the transducer and bottom parts. This zinc ring should be checked each time the ship is dry docked and changed if badly corroded. SAL-840 Manual 53SAL-840 Manual SECTION 10 CERTIFICATES 54