B&G Ultrasonic Speed Sensor
Contents
1. 12 ULTRASONIC SPEED SENSOR 9 12 mm ma 3 8 1 2 pour In larger than the casting hole through the hull s outer skin inner skin core hull thickness il AAA MINIMI MM MITI solid or hollow cylinder outer skin Figure 1 7 Preparation of a Cored Fibreglass Hull 1 9 3 Attaching the safety wire Plastic housing Attach the wire to one eye of the hull nut Twist the wire anti clockwise direction and thread it through one of the eyes in the cap nut then through the pull ring and the other eye of the cap nut and finally through the opposite eye of the hull nut Twist the wire onto itself to lock the assembly Bronze housing Wrap one end of the locking wire around the housing and twist it together Thread the other end up through the eyehole in the cap nut loop the wire through the pull ring and twist it securely onto itself to lock the assembly Route the cables to the interface box being careful not to damage the insulation when passing through bulkheads etc In order to reduce electrical interference separate the sensor cables from electrical wiring and other sources of noise Immediately after putting the boat into the water check the installation for signs of leakage Note that small leaks may not be readily observed It is advised that the boat is not left in the water for more than 3 hours before re checking the installation for leaks If leakage is observe2. EXCELLENCE IN MARINE ELECTRONICS A Simrad Company B amp G Ultrasonic Speed Sensor Installation and User Manual BGH074004 02 ULTRASONIC SPEED SENSOR ULTRASONIC SPEED SENSOR Certification CE Warnings and Precautions Warning This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference the user is encouraged to try to correct the interference by relocating the equipment or connecting the equipment to a different circuit Consult an authorised dealer or other qualified technician for additional help if these remedies do not correct the problem This device meets the requirements for CFR47 Part 15 of the FCC limits for Class B equipment The Ultrasonic Speed Sensor meets the standards set out in European Standard EN 60945 1997 IEC 945 1996 for maritime navigation and radiocommunication equipment and systems The Ultrasonic Speed Sensor system contains no user serviceable parts Only an authorised service centre should be used to make repairs Unauthorised repairs or modifications will void your warranty Trademarks All rights reserved No part of this manual may be reproduced or transmitted in any form or by any means including photocopyin
3. the epoxy has set refer to the manufacturer s instructions remove the cylinder Clean and sand the area around the hole inside and out to ensure that the sealant will adhere properly to the hull Remove the cap nut sensor insert hull nut and washer refer to figure 4 Apply a 2mm 1 16 inch thick layer of marine sealant around the lip of the housing Apply a layer of sealant up the sidewalls of the housing to approximately 6mm 1 4 inch higher than the total thickness of the hull washer and hull nut This will ensure that sufficient sealant will remain in the threads to seal the hull and hold the nut securely in place From outside the hull push the housing into the cut hole using a twisting motion this will squeeze out the excess sealant From inside the hull slide the washer over the housing Fit the hull nut and tighten If you are using a plastic housing hand tighten only on the hull nut if you are using a bronze unit tighten the hull nut using slip joint pliers After tightening remove excess sealant on the outside of the hull to ensure smooth water flow over the sensor Once the sealant has cured refer to manufacture s instructions inspect the O ring seals on the sensor insert Lubricate the seals using silicone grease or petroleum jelly slide the insert into the housing being sure to engage the key in the notch a careful pushing twisting motion will ensure engagement Fit the cap nut and hand tighten only
4. SOR 1 1 Introduction The Ultrasonic Speed Sensor offers highly accurate boat speed measurement with minimum of maintenance due to not having any moving parts The Ultrasonic Speed Sensor uses ultrasonic pulses to obtain echoes from particles in the water If the sensor loses contact with the water or is positioned in a flow of highly aerated water it will lose its signal and register an incorrect speed measurement Once good water contact is re established boat speed is recovered instantly The Ultrasonic Speed Sensor is unsuitable for use with high speed stepped hull type boats that induce airflow under the hulls Before you begin using the Ultrasonic Speed Sensor please take the time to read this manual to help you achieve the full potential of your system 1 2 Features No moving parts Highly responsive speed measurement Highly accurate from 0 1 to 60 knots Negligible drag Full retrofit with post 1997 paddlewheel type speed installations 1 3 Compatibility The Ultrasonic Speed Sensor requires integration with one of the following systems e Hydra e Hercules e HS2000 Note dependent upon the age of your system the software may need to be upgraded Refer to your National Distributor for more information ULTRASONIC SPEED SENSOR 1 4 Operation The Ultrasonic Speed Sensor uses ultrasonic pulses to collect echoes from small particles in the water as they pass under the two transducers embedded in the uni
5. d remove the boat from the water and repeat the installation procedure 13 ULTRASONIC SPEED SENSOR 1 10 Maintenance The retractable sensor units are supplied with a blanking plug which must be used when Ultrasonic Speed transducer is removed for inspection maintenance replacement or storage Removing the Ultrasonic Speed transducer from the Flapper Valve housing Inspect and lubricate the O ring seals on the blanking plug using silicone grease or petroleum jelly Remove and discard the safety wire Refer to Figure 1 6 on Page 1 9 of this manual Remove the safety ring from one end of the retaining pin Using the remaining safety ring withdraw the retaining pin from the flapper valve housing Hold the blanking plug in one hand with the other hand pull the transducer out of the flapper valve housing and replace it with the blanking plug Seat the blanking plug in place using a twisting motion until the key fits into the notch in the housing With practice only a small amount of water will enter the boat Refit the retaining pin and safety ring Refitting the Ultrasonic Speed transducer is a reversal of the above procedure Note ensure that the key on the transducer is correctly located in the notch on the flapper valve housing before fitting the retaining pin and pull ring Secure the assembly as previously described with new locking wire Cleaning the Ultrasonic Speed transducer Aquatic growth can accumulate rapidly
6. ercules Main ji Cable from Ultrasonic Speed Sensor Junction Box Note All screened wires must have their screen attached to the clamp bar across the front case Figure 1 3 Connections to Hvdra Hercules Processor Terminal Function BOATSPEED INPUT Green NO CONNECTION GROUND Black SEA TEMP PADDLE SUPPLY Red White SEA TEMP INPUT Yellow Table 1 3 Speed sensor wire functions H Series ULTRASONIC SPEED SENSOR 1 9 Installation Select a suitable location on the boat s hull refer to Figure 1 Clean the chosen area inside the hull using a mild household detergent or a weak solvent such as alcohol to remove traces of fuel grease etc pressure waves 19 eso D ri 9 a Sort 150 300mm Load Waterline Length l 6 12 displacement hull outboard and 1 0 planning hulls inboard step hull full keel sailboat Figure 1 5 Suitable locations for Thru hull Sensor Mounting 10 ULTRASONIC SPEED SENSOR 1 9 1 Single Skin Hull Drill a 3mm 1 8 inch pilot hole from inside the hull Using a 51mm 2 inch hole saw cut a hole from the outside of the hull Clean and sand the area around the hole to ensure that the sealant will adhere properly to the hull plastic housing metal housing ultrasonic insert retaining pin safety ring 2 safety wire cap nut emergency plug hull nut washer hull sealant on lip and side wall F
7. g and recording for any purpose without the express written permission of B amp G Information in this document is subject to change without notice B amp G reserves the right to change or improve its products and to make changes in the content without obligation to notify any person or organisation of such changes B amp G is the trademark of Brookes amp Gatehouse Ltd and may not be used without the express permission of B amp G ULTRASONIC SPEED SENSOR Contents Para Page 1 1 INTRODUGC TIO Nein ii ini da Sones 4 12 FEATURES i aedebranccausneaeseeea nee ta ere ages 4 1 3 GOMPATIBIEE Mi i et entend mien 4 1 4 nn crea a ed 5 157 a dia Re ecm Pe 6 1 6 6 1 7 INSTALLING THE ULTRASONIC SPEED SENSOR JUNCTION BOX 7 1 8 JUNCTION BOX ELECTRICAL CONNECTIONS ccccccecceccccecceceececceceeeeceeees 8 1 8 1 ULTRASONIC CONNECTIONS TO HYDRA HERCULES PROCESSOR 9 1 9 JINSTALLATION iii senc sont unes tes s 10 1 9 1 SINGLE SKIN AGE rar aa sata ka faute 11 1 9 2 CORED FIBREGLASS HULL e e 11 1 9 3 ATTACHING THE SAFETY WIRE 13 1 10 MAINTENANCE Ea arom es das ceuneceecasereseces 14 ULTRASONIC SPEED SEN
8. igure 1 6 Ultrasonic Speed Sensor Assembly 1 9 2 Cored Fibreglass Hull Note To install a thru hull housing in a cored fibreglass hull the core wood or foam must be sealed carefully the core must be protected from water seepage and the hull must be reinforced to prevent it crushing under the hull nut and allowing the housing to become loose Drill a 3mm 1 8 inch pilot hole from inside the hull Using a 54mm 2 inch hole saw cut a hole from the outside of the hull through the outer skin only refer to figure 3 Using a 60mm 2 3 8 inch hole saw from inside the hull cut through the inner skin and most of the core Apply only light pressure to the hole saw after the inner skin has been cut through as the core material can be very soft and too much force could result in damage to the outer skin Remove the plug of core material so that the inside of the outer skin and the inner core are fully exposed Clean and sand the inner skin core and the outer skin around the hole 11 ULTRASONIC SPEED SENSOR There are two methods for preparing the hull to receive the housing 1 Saturate layers of fibreglass cloth with a suitable resin and lay the cloth inside the hole to seal and strengthen the core adding layers until the correct diameter is achieved 2 Coat a cylinder of the correct diameter with wax and gently tap it into the hole in the outer skin Fill the gap between the cylinder and the inner skin with casting epoxy After
9. ltrasonic Speed Sensor Junction Box Select a suitable dry location ensuring adequate clearance from other equipment or structures Use a pencil or other marking device to locate the mounting holes Drill the mounting holes for the unit Using the self tapping screws supplied secure the junction box The junction box must not be submerged Install the unit with the cable entries facing downward to prevent water ingress ULTRASONIC SPEED SENSOR 1 8 Junction Box Electrical Connections 7134 LHM qad ENSOR fo 12 Volt DC Hvdra Hercules or HS Ultrasonic Speed Power Supplv Svstem supplv cable Sensor Transducer Cable Figure 1 2 Junction box electrical connections NOTE Trim all screens from the cables in the junction box to ensure that they do not make contact with each other or any other wire or component in the junction box Terminal Function Wire Colour SEA TEMP INPUT SEA TEMP SUPPLY BOATSPEED INPUT GROUND BOATSPEED SUPPLY INSTRUMENT BOATSPEED SUPPLY BOATSPEED OUTPUT GROUND SEA TEMP SUPPLY SEA TEMP OUTPUT BATTERY RED 10 15V DC Red BLK GROUND Black Table 1 2 Junction box wire functions ULTRASONIC SPEED SENSOR 1 8 4 Ultrasonic Connections to Hydra Hercules Processor Hydra H
10. on the transducer surface reducing performance Clean the surface with a soft cloth and mild household detergent If fouling is severe use a stiff brush or a putty knife Take care not to cause scratches on the transducer face Wet sanding using fine grade wet dry paper is permissible to remove stubborn deposits Antifouling paint Surfaces exposed to salt water must be coated with antifouling paint refer to figure 4 Use only water based antifouling paint Solvent based paints must not be used Solvent based paints contain keytones which may attack the plastic surfaces and damage the sensor Re apply the antifouling paint every six months or at the start of each boating season 14 ULTRASONIC SPEED SENSOR long blanking plug ultrasonic pull ring insert small O rings active face gt valve assembly flap valve valve housing housing BOW gt Figure 1 8 Maintenance 15 2004 Brookes amp Gatehouse Ltd B amp G Ltd Premier Way Abbey Park Romsey SO51 9DH UK www BandG com BGH074004 02
11. t refer to figure 1 1 These transducers monitor the particles in their respective beams As the boat travels through the water both transducers view the same stream of particles Because it takes time for the particles to travel between the two transducers the transducer detects the particles later than does the forward transducer By measuring this time lapse the instrument processor is able to calculate the speed of the boat through the water lt vessel direction particle stream Figure 1 1 Monitoring particles in the water ULTRASONIC SPEED SENSOR 1 5 Setup The setup and calibration procedure for the Ultrasonic Speed Sensor is identical to the procedure for calibrating a paddlewheel speed sensor as explained in the relevant section of your system User Manual 1 6 Specifications Ultrasonic frequency Pulse repetition frequency Distance to particles Thru hull diameter DC voltage supply Current Operating temperature range Data update rate Accuracy Minimum speed Maximum speed Outputs Weight 4 5MHz 5 7KHz fixed 8 to 13cm 3 to 5 inches 5 1cm 2 inches 10 to 15 Volts 155mA 12 VDC 0 C to 40 C 32 F to 140 F 2Hz 2 0 1 knot 0 1 knot 60 knots Simulated Hall cell paddlewheel at 20 000 pulses per nautical mile 5 6Hz knot 1 3Kg 2 8lbs Table 1 1 Specifications 1 7 2 3 4 Note ULTRASONIC SPEED SENSOR Installing the U
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