Streamer Hydrophone Operation Manual
Contents
1. cccccccsseeceeeeeeeeeeneeceneeeeneeeseeeneseaneeseneneneeaes 12 WIRING DETAILS AH 1 360 250 150 ON 13 11 TECHNICAL ee an el LE 14 APPENDIX A PMX561 MSDS a ieee pues aa ae mate eco a ia ea nc 15 APPENDIX B DEPTH SENSOR 12 ELEMENT HYDROPHONE STREAMER RRE E EEN EN 22 Thank you for choosing Applied Acoustic Engineering as one of your subsea equipment suppliers We hope you experience many years of reliable operational use from our products If you do encounter any technical issues with any of our products then please don t hesitate to contact our Technical Team via the following methods Tel 44 0 1493 440355 Fax 44 0 1493 440720 Email techsupport appliedacoustics com Applied Acoustic Engineering Ltd has made every effort to ensure that the information contained in this manual is correct at time of print However our policy of continual product improvement means that we cannot assume liability for any errors which may occur this manual refers to Applied Acoustic Engineering Ltd cannot be held responsible for any issues arising from the improper use or maintenance of equipment referred to in this manual or failure of the operator to adhere to the instructions laid out in this manual The user must be familiar with the contents of this manual before use or operation These written instructions must be followed fully for reliable and safe operation of the equipment that Page 3 of 24 Streamer Hydrophone2. 15 REGULATORY INFORMATION 15 1 Safety health and environmental regulations legislation specific for the substance or mixture Status EINECS All ingredients listed exempt or notified ELINCS TSCA All chemical substances in this material are included on or exempted from listing on the TSCA Inventory of Chemical Substances All ingredients listed exempt or notified All ingredients listed or exempt All ingredients listed exempt or notified All ingredients listed exempt or notified All ingredients listed or exempt Page 20 of 24 Streamer Hydrophone Operation Manual d N APPLIED ACOUSTICS HYD 000 00 8000 1 P Underwater Technology XIAMETER XIAMETER R e SAFETY DATA SHEET According to article 31 and Annex II of the EU REACH Regulation Version 3 0 Revision Date 14 08 2013 Superseded date 20 09 2010 XIAMETER R PMX 561 TRANSFORMER LIQUID 16 OTHER INFORMATION This product safety data sheet was prepared in compliance with article 31 and Annex II of the EU REACH Regulation as well as its relevant amendments on the approximation of laws regulations and administrative provisions relative to the classification packaging and labelling of dangerous substances and preparations It is the responsibility of persons in receipt of this Product Safety Data Sheet to ensure that the information contained herein is properly read and understood by all people who may use handle dispose or in any way come in conta
3. 2 1 Classification of the substance or mixture According to Regulation EC No 1272 2008 Not hazardous According to EU Directives 67 548 EEC or 1999 45 EC Not hazardous 2 2 Label elements No special packaging or labelling requirements Page 15 of 24 Streamer Hydrophone Operation Manual HYD 000 00 8000 1 XIAMETER from DOW CORNING XIAMETER R SAFETY DATA SHEET According to article 31 and Annex II of the EU REACH Regulation d D APPLIED ACOUSTICS Underwater Technology Version 3 0 Revision Date 14 08 2013 Superseded date 20 09 2010 XIAMETER R PMX 561 TRANSFORMER LIQUID 3 COMPOSITION INFORMATION ON INGREDIENTS Chemical characterization Silicone According to EU Directives 67 548 EEC or 1999 45 EC Name No hazardous ingredients CAS No REACH Conc Registration w w Number EINECS ELINCS No According to Regulation EC No 1272 2008 Name Polydimethylsiloxane CAS No 63148 62 9 REACH Conc w w EINECS ELINCS Registration No Number Exemptor not available 100 0 Classification Classification CLP classifications are based on all current available data including from known international organizations These classifications are subject to revision as more information becomes available 4 FIRST AID MEASURES 4 1 Description of First Aid Measures On contact with eyes On skin contact If inhaled On ingestion No first a
4. HYD 000 00 8000 1 d Kb Underwater Technology Appendix B Depth Sensor 12 Element Hydrophone Streamer User Manual for Depth Sensor Integrated into 12 Element Hydrophone Streamer O WARNINGS The streamer is for sub surface application only and should on no account be used at depths exceeding 20 metres as this will cause permanent damage to the elements The supplied Universal Input Plug top Adaptor has an input range of 100 240VAC No user serviceable parts inside The depth sensor integrated into the 12 Element Hydrophone Streamer is pre calibrated and needs no adjustment To Cable Connection Box To DC Plug top Adaptor Power _ Hydrophone signal output BNC Fig 1 Simplified view of Depth Readout Meter Page 22 of 24 Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 d Kb Underwater Technology Fig 1 shows the Depth Readout Meter It has three connectors e The DC power socket on the right should be connected to the 24VDC output universal input Plug top Adaptor included with the kit This provides all of the power requirements for the Hydrophone Pre amplifier and depth sensor e The centre connector supplies the Hydrophone signal output and should be connected to the relevant instrumentation e The connector on the left is connected to the plastic cable connection box which in turn is connected to the 75m soft tow cable to the Hydrophone Streamer This connector may be remov
5. If performance is poor check that all cables or cable connections are electrically secure and sound Switch off CSP unit before checking Check that the unit is sitting in the water at the recommended depth see deployment Rough sea conditions will cause signal deterioration Please quote the serial number of the unit and model number when contacting the factory Wiring Details AH 1 360 250 150 Only COLOUR DESCRIPTION WHITE SIGNAL O P BLACK GROUND ORANGE 9VDC Page 13 of 24 Streamer Hydrophone Operation Manual AY APPLIED ACOUSTICS HYD 000 00 8000 1 Underwater Technology 11 Technical Specifications Streamer Type Tow Leader Tube Type Tube Length Oil Type Depth Rating Battery Type Battery Life Elements Sensitivity 8 element 12 element 20 element Wide Band 20 element AH610 24 LF element AH1000 20 LF element Frequency Response Signal Output Connector type 176 dB ref 1v per uPa 163 dB ref 1v per uPa 167 dB ref 1v per uPa 192 dB ref 1v per uPa Fluid filled with multi elements 50 metres as standard Polyurethane 4 5 metres AH 1 360 250 150 14 metres AH610 24 LF 21 metres AH1000 20 LF PMX561 Oil Refer to Appendix A for MSDS 50 metres element crush depth PP3 MN1604 AH 1 360 250 150 External 24VDC Power AH610 24 LF amp AH1000 20 LF gt 5 Days for good quality Alkaline cells Spacing and quantity vary
6. e Low Battery Voltage e Hydrophone damage e Mechanical damage Water Ingress to Pre Amp e Source Malfunction Solution e Inspect hydrophone assembly for damage e Verify operation of hydrophone by tap test check battery SEE OVER PAGE FOR PROCEEDURE e If data intermittent check hydrophone array and cabling for continuity Symptoms e Reduction in signal intensity Possible Causes e Battery expired e Water Ingress e Mechanical damage Solution e Replace battery if battery voltage is below 8V e Inspect hydrophone assembly for damage Symptoms e Reduction in data quality Possible Causes e Battery expired Air in hydrophone resulting in noise and incorrect tow depth Water in hydrophone resulting in noise and incorrect tow depth Water Ingress pre amp malfunction Mechanical damage olution Replace battery if battery voltage is below 8V Inspect hydrophone assembly for damage Inspect hydrophone array for air water ingress re fill with ISOPAR and find leak Rebalance if required Oe e e Page 12 of 24 Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 d Kb Underwater Technology Fault Identification and Rectification Cont Tips A simple test can be carried out to ensure in air functionality With a fresh battery inserted in the battery box and the unit switched on an oscilloscope can be used to check for a waveform each time the hydrophone is tapped
7. 000 00 8000 1 XIAMETER from DOW CORNING D APPLIED ACOUSTICS Underwater Technology XIAMETER R SAFETY DATA SHEET According to article 31 and Annex II of the EU REACH Regulation Version 3 0 Revision Date 14 08 2013 Superseded date 20 09 2010 XIAMETER R PMX 561 TRANSFORMER LIQUID Hygiene measures Additional information Environmental exposure controls Exercise good industrial hygiene practice Wash after handling especially before eating drinking or smoking These precautions are for room temperature handling Use at elevated temperature or aerosol spray applications may require added precautions For further information regarding the use of silicones organic oils in consumer aerosol applications please refer to the guidance document regarding the use of these types of materials in consumer aerosol applications that has been developed by the silicone industry www SEHSC com or contact the Dow Corning customer service group Refer to section 6 and 12 9 PHYSICAL AND CHEMICAL PROPERTIES Form Colour Odour Boiling point range Flash point Explosive properties Specific Gravity Viscosity Oxidizing properties Liquid Colorless Characteristic odour gt 65 C gt 101 C Closed Cup No 0 96 50 cSt at 25 C No The above information is not intended for use in ing product specifications 10 STABILITY AND REACTIVITY 10 1 Reactivity 10 2 Stability 10 3 Possibility of haza
8. according to model typ typ typ typ PP e i PP 187 dB ref 1v per uPa typ 164 dB ref 1v per uPa typ 140HZ to 10 kHz 3dB AH 1 360 250 150 115Hz to 7 2 kHz 3dB AH610 24 LF amp AH1000 20 LF Up to 8 volts peak to peak AH 1 360 250 150 BNC connector 50 or 75 ohm cable can be used Page 14 of 24 Streamer Hydrophone Operation Manual d NN APPLIED ACOUSTICS HYD 000 00 8000 1 P Underwater Technology Appendix A PMX561 MSDS XIAMETER XIAMETER R from DOW CORNING SAFETY DATA SHEET According to article 31 and Annex II of the EU REACH Regulation Version 3 0 Revision Date 14 08 2013 Superseded date 20 09 2010 XIAMETER R PMX 561 TRANSFORMER LIQUID 1 IDENTIFICATION OF THE SUBSTANCE PREPARATION AND OF THE COMPANY 1 1 Product name gt XIAMETER R PMX 561 TRANSFORMER LIQUID 12 Identified uses Electrical and electronic applications Insulating agents Uses advised against None known 1 3 Company Dow Corning Europe S A rue Jules Bordet Parc Industriel Zone C B 7180 Seneffe Belgium E mail address Safety sdseu dowcorning com Data Sheet Customer Service English Tel 49 611237507 aCe Lene Tel 32 64511149 Fax 49 611237601 Fax 32 64888683 1 4 Emergency Phone Dow Corning Barry U K 24h Tel 44 1446732350 Number Dow Corning Wiesbaden 24h Tel 49 61122158 Dow Corning Seneffe 24h Tel 32 64 888240 2 HAZARDS IDENTIFICATION
9. knots Speed over the ground At survey speeds above 4 knots the noise on the streamer may result in severe degeneration of the data quality Page 7 of 24 Streamer Hydrophone Operation Manual d NN APPLIED ACOUSTICS HYD 000 00 8000 1 d Kb Underwater Technology 6 Operation AH 1 360 250 and 150 Hydrophones e Insert PP3 9VDC battery e Connect BNC signal cable to seismic recorder e Switch Hydrophone ON AH 610 24 LF amp AH 1000 20 LF Hydrophones Configuration Sa FILTER TOPEND e Select Filter In or Out via jumper ON OFF GAIN e Select Pre Amp Gain Level JP 7 e Select Topside Amp Gain Level JP 6 Operation Signal Level Indicators OK FF e Pre Amp Signal Level Indicator 4 p a Adjust gain levels so that amplifiers EDS LEVEL INDICATOR are not saturated indicated by LED 9 TOO HIGH JS LED9 gs d GNA oK JE ED10 e Output Signal Level Indicator Ok T D1 Adjust gain levels so that amplifiers are not saturated indicated by LED 12 Too HiGH JE LED SET GAIN LINKS SO ALI ARE IN THE OK REG Connections Connect Hydrophone to Power Pre amp Control Box Connect Ground to Ships Ground Connect 24VDC Input Positive connection centre pin Connect BNC signal cable to seismic recorder Page 8 of 24 Streamer Hydrophone Operation Manual HYD 000 00 8000 1 q I APPLIED ACOUSTICS Underwater Technology 7 Acquisition Configuration Example D S AAE BOOMER SP
10. A T APPLIED ACOUSTICS AR Underwater Technology Streamer Hydrophone Operation Manual Applied Acoustic Engineering Ltd T 44 0 1493 440355 Marine House Marine Park Oo 44 0 1493 440720 Gapton Hall Road general appliedacoustics com Great Yarmouth NR31 ONB KO www appliedacoustics com United Kingdom Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 d Kb Underwater Technology Revision History Reason for change Update manual with PMX561 MSDS and the removal of the DC561 MSDS 09 05 14 Manual document number revised previously CSP 1000 8002 Other minor amendments Page 2 of 24 Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 d Kb Underwater Technology Table of Contents REVISION IN tal EE 2 l INTRODUC HON a a a a an nn 4 2 A ENEE en Eu La BE 5 3 THEORVOPOPERATION nee ene ee ee ee ee 6 4 MODELSAVAILABLE ane ee De rere ee are 6 5 OPERATION CONSIDERATIONS cccccsccseeeeceeeeeneeeneeceneeceseeeneeceneeseneeeaaeeeaeeeaaeseneseaneesenesonseseneesons 7 D OPERATIONS a ee ana a de ed ane E an ee 8 7 ACQUISITION CONFIGURATION EXAMPLE cccccccceseeeeeeeeeneeeeneeceseeeneeeeneesaneeceneeeeeseneesanessneneas 9 8 MAINTENANCE PROCEDURES eessen eren ene ue SEENEN 10 9 PRODUCT RECYCLING DISPOSAL eeskeERRKERR KEEN ENER ERR NRR ERKENNEN EERR KEREN RE ENER KEN ENKER KEREN 11 10 FAULT IDENTIFICATION AND RECTIFICATION
11. ARKER wm e a SYSTEM BLOCK DIAGRAM IL N ETS wi ee N OMS 360 or CODA Ss s Seismic Processor KA Ss ee a det N gt EPC Ultra or reese em e regen Alden G ic e shh vi L GEI Toi E Bees Signal XX SI BJ gt S S ez de Lu Ge E ET E Se Fy pe LS D N XO Battery for INR yey EEE Hydrophone Catamaran Boomer Plate H V Se or Sparker Air Cable Water Seawater T 1 Earth To Boomer To8or20 Plate or Sparker Element Hvdrophone Page 9 of 24 Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 d Kb Underwater Technology 8 Maintenance Procedures The below procedures are advisory guidelines that are recommended Inspection Intervals e Pre Deployment The recommended interval for a visual inspection is on every deployment of the streamer e Monthly It is recommended that the streamer is electrically checked Visual Inspection Pre Deployment e Check condition of hydrophone array for signs of water air ingress e Check for mechanical damage insecure fastenings e Check for water ingress into pre amp housing visual only Monthly Inspection Pre Survey e Verify operation of hydrophone by performing tap test e Check condition of hydrophone array for signs of water air ingress e Check for mechanical damage insecure fastenings The Applied Acoustic Engineering Streamer hydrophones do not require regular ser
12. Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 Underwater Technology 1 Introduction Streamer Hydrophones consist of a number of hydrophone elements which are wired together and fitted inside a fluid filled polyurethane tube A pre amplifier is employed to boost the signal and drive an electrical cable which also acts as the tow leader The quantity of elements and their relative spacing s are used to control the receiving beam pattern of the streamer hydrophone and its receiving frequency band Page 4 of 24 Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 P Underwater Technology 2 Parts Designation TOW LEADER SIGNAL OUTPUT 9V PP3 BATTERY INTERNAL en Er TT ON OFF SWITCH re ET PRE AMPLIFIER Lg e A PRE AMP HOUSING p Lo Lo CH HYDROPHONE ARRAY LG ESCH L 2 TAIL FILL POINT TAIL ROPE Page 5 of 24 Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 d Kb Underwater Technology 3 Theory of Operation The term streamer is used to denote the fact that the device streams behind the towing vessel A tail rope is utilised at the rear end of the assembly to assist in towing stability The beam pattern of the streame
13. ct with the product If the recipient subsequently produces a formulation containing the product it is the recipient s sole responsibility to ensure the transfer of all relevant information from the Product Safety Data Sheet to their own Product Safety Data Sheet in compliance with article 31 and Annex II of the EU REACH Regulation All information and instructions provided in this Safety Data Sheet SDS are based on the current state of scientific and technical knowledge at the date indicated on the present SDS Dow Corning supplying entity shall not be held responsible for any defect in the product covered by this SDS should the existence of such defect not be detectable considering the current state of scientific and technical knowledge As stated above this Safety Data Sheet has been prepared in compliance with applicable European law If you purchase this material outside Europe where compliance laws may differ you should receive from your local supplier a SDS applicable to the country in which the product is sold and intended to be used Please note that the appearance and content of the SDS may vary even for the same product between different countries reflecting the different compliance requirements Source of information Internal data and publically available information XIAMETER R is a trademark of Dow Corning Corporation http www xlameter com Page 21 of 24 Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS
14. ed by unscrewing the knurled part anti clockwise and withdrawing To re connect align the locating tag insert and turn knurled part clockwise until finger tight When all equipment is connected Fig 2 and the power switched on the Depth Readout Meter will display the depth of the sensor under water in Metres to a resolution of 0 1m CABLE CONNECTION DEPTH READOUT BOX METER a UNIVERSAL INPUT PLUGTOP ADAPTOR S 75m SOFT TOW La SCH HYDROPHONE SIGNAL OUT CABLE 12 ELEMENT HYDROPHONE STREAMER WITH STANDARD HYDROPHONE PRE AMPLIFIER Fig 2 Representation of Cable connection scheme Page 23 of 24 Applied Acoustic Engineering is a leading company in the design and manufacture of a wide range of subsea navigation and positioning products and marine seismic survey equipment The extensive product range includes the innovative USBL tracking system Easytrak a variety of positioning and release beacons and seismic devices for offshore geotechnical and seabed analysis known as sub bottom profiling All products use acoustics underwater sound waves in location positioning navigation and data acquisition applications system Easytrak a variety of positioning and release beacons and seismic devices for
15. he streamer and ultimately displayed by the processor recorder system The streamer must be towed at such a depth that the up travelling reflected seismic signal and the down travelling surface ghost will interfere constructively This is achieved at a depth corresponding to a time lag T equal to the time between the first minimum and the first maximum of the reflected pulse For example if T is around 0 25ms Assuming water velocity V 1500 m s T corresponds to a path of 0 375m From this follows that the optimum streamer depth will be 0 375 2 0 1875m As mentioned previously it requires trial and error and experience to balance the streamer at the relevant depth The weight of the tow leader can be buoyed up with the help of close cell foam pipe insulation Armstrong Armaflex is a suitable brand which is supplied in 2 metre lengths which must be taped to avoid turbulence around the ends of the material A faster tow speed will tend to lift the bow of the streamer Additional weight or additions to the tail rope may be required to keep the stern of the streamer at the correct level Vessel noise water depth and seabed type are also inter related A combination of a hard bottom relative shallow depth and a noisy vessel may result in sufficient reverberation that the overall noise will practically exceed the reflected seismic signal It is generally considered that the optimum survey speed for surface towed seismic O profiling is approx 3
16. id should be needed No first aid should be needed No first aid should be needed No first aid should be needed 5 FIRE FIGHTING MEASURES 5 1 Suitable extinguishing media Unsuitable extinguishing media 5 2 Hazards during fire fighting Hazardous Combustion Products 5 3 Special protective equipment procedures On large fires use dry chemical foam or water spray fog On small fires use carbon dioxide CO2 dry chemical or water spray Water can be used to cool fire exposed containers None known None known Thermal breakdown of this product during fire or very high heat conditions may evolve the following decomposition products Silica Carbon oxides and traces of incompletely burned carbon compounds Formaldehyde A self contained respirator and protective clothing should be worn Determine the need to evacuate or isolate the area according to your local emergency plan Use water spray to keep fire exposed containers cool Page 16 of 24 Streamer Hydrophone Operation Manual d HYD 000 00 8000 1 XIAMETER from DOW CORNING I APPLIED ACOUSTICS Underwater Technology XIAMETER R SAFETY DATA SHEET According to article 31 and Annex II of the EU REACH Regulation Version 3 0 Revision Date 14 08 2013 Superseded date 20 09 2010 XIAMETER R PMX 561 TRANSFORMER LIQUID 6 ACCIDENTAL RELEASE MEASURES 6 1 Personal precautions protective equipment and emergency procedures 6 2 E
17. n product test data Based on test data from similar products 12 ECOLOGICAL INFORMATION 12 1 Ecotoxicity effects No adverse effects on aquatic organisms 12 2 Persistence and degradability Siloxanes are removed from water by sedimentation or binding to sewage sludge In soil siloxanes are degraded 12 3 Bioaccumulation No bioaccumulation potential 12 4 Release to waters Mobility in soil Fate and effects in waste water treatment plants Removed gt 90 by binding onto sewage sludge No adverse effects on bacteria The siloxanes in this product do not contribute to the BOD Page 19 of 24 Streamer Hydrophone Operation Manual d NN APPLIED ACOUSTICS HYD 000 00 8000 1 P Underwater Technology XIAMETER XIAMETER R from DOW CORNING SAFETY DATA SHEET According to article 31 and Annex II of the EU REACH Regulation Version 3 0 Revision Date 14 08 2013 Superseded date 20 09 2010 XIAMETER R PMX 561 TRANSFORMER LIQUID 13 DISPOSAL CONSIDERATIONS Product and packaging Dispose of in accordance with local regulations According to the European Waste disposal Catalogue Waste Codes are not product specific but application specific Waste codes should be assigned by the user preferably in discussion with the waste disposal authorities 14 TRANSPORT INFORMATION Road Rail ADR RID Not subject to ADR RID Sea transport DG Not subject to IMDG code Air transport IATA Not subject to IATA regulations
18. nvironmental precautions 6 3 Methods and materials for containment and cleaning up Wear proper protective equipment Prevent from spreading or entering into drains ditches or rivers by using sand earth or other appropriate barriers Determine the need to evacuate or isolate the area according to your local emergency plan Very large spills should be contained by bunding etc procedures Mop wipe or soak up with absorbent material and place in a container with a lid The spilled product produces an extremely slippery surface 7 HANDLING AND STORAGE 7 1 Advice on safe handling 7 2 Advice on storage 7 3 Specific uses Avoid eye contact General ventilation is recommended Do not empty into drains Do not store with oxidizing agents Storage temperature minimum 30 C maximum 60 C Refer to technical data sheet available on request 8 EXPOSURE CONTROLS PERSONAL PROTECTION 8 1 Control parameters Name CAS No Exposure Limits None of the components have assigned exposure limits 8 2 Exposure controls Engineering Controls Personal protection equipment Respiratory protection Hand protection Eye face protection Skin protection Ventilation Refer to Section 7 1 Respiratory protection is not normally required Gloves are not normally required Safety glasses should be worn Protective equipment is not normally necessary Page 17 of 24 Streamer Hydrophone Operation Manual d HYD
19. o reduce unwanted noise below 140Hz and above 10 kHz Other filters can be supplied if required The hydrophone pre amplifier fitted to the Low Frequency streamer has a switchable filter to reduce unwanted noise below 115Hz and above 7 2 kHz The Low Frequency model utilises an electrically differential signal drive for improved noise immunity with programmable pre amplifier and top side signal conditioning Page 6 of 24 Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 d Kb Underwater Technology 5 Operation Considerations An acoustically quiet towing position for the mini streamer is critical for the quality of data acquisition Usually the quietest and least disturbed position with respect to the vessel is found at the stern at the either side of the propeller wash In practice this position can be achieved by towing the mini streamer from a boom of perhaps some 4 5 metres long mounted close to the stern In case the survey vessel has two propellers the offset between the turbulent wake and the streamer may be increased by using one engine only while surveying The optimum towing position of the streamer must be considered as the determining factor for the overall source streamer geometry and some experimentation is usually required for an unfamiliar vessel The towing depth of the streamer below the water surface is of prime importance for the final shape of the reflected seismic signal as sensed by t
20. offshore geotechnical and seabed analysis known as sub bottom profiling Registration No U6447 BS EN 1SO9001 d N Due to continual product improvement specification information may be A APPLIED ACOUSTICS subject to change without notice Underwater Technology Applied Acoustic Engineering Limited
21. r is designed for maximum attenuation along ships to reduce the effect of ship noise when towing behind a vessel and has maximum gain athwart ship port to starboard in order to detect the maximum signal possible from the seabed Streamer hydrophones by their very nature consist of a number of sensitive piezo ceramic receiving elements These elements are brittle and can be damaged by crushing sharp blows or general abuse Likewise the tow leader although robust should be handled in a way that undue abrasion is avoided and should any cuts appear on the skin are repaired at the earliest opportunity The fluid inside the tube is known by its brand name of PMX561 and should there be air bubbles inside the tube standard de odorised kerosene as used in some other streamers is not a suitable substitute Should air bubbles be present the lower end requires unscrewing and filled until all the air bubbles have dispersed 4 Models Available The Applied Acoustics mini streamers are specifically designed for the broad frequency spectrum emitted by the AAE sound sources The following types are built for stock as the most common designs used by most organisations for usual water depths Model Number of Elements Spacing AH360 8 8 360mm Hydrophone streamers can be made with different element spacing s and different quantities of elements The standard pre amplifier in the streamer includes a small degree of filtering t
22. rdous reactions 10 4 Conditions to avoid 10 5 Materials to avoid 10 6 Hazardous decomposition products None known Stable under normal usage conditions None known None established Can react with strong oxidising agents Thermal breakdown of this product during fire or very high heat conditions may evolve the following decomposition products Silica Carbon oxides and traces of incompletely burned carbon compounds Formaldehyde Page 18 of 24 Streamer Hydrophone Operation Manual d NN APPLIED ACOUSTICS HYD 000 00 8000 1 P Underwater Technology XIAMETER XIAMETER R from DOW CORNING SAFETY DATA SHEET According to article 31 and Annex II of the EU REACH Regulation Version 3 0 Revision Date 14 08 2013 Superseded date 20 09 2010 XIAMETER R PMX 561 TRANSFORMER LIQUID 11 TOXICOLOGICAL INFORMATION Acute toxicity On contact with eyes May cause temporary discomfort On skin contact No adverse effects are normally expected If inhaled No adverse effects are normally expected On ingestion No adverse effects are normally expected Oral LD50 Rat gt 15 400 mg kg Dermal LD50 Rabbit gt 2 000 mg kg Chronic toxicity On skin contact No adverse effects are normally expected If inhaled No adverse effects are normally expected On ingestion No adverse effects are normally expected Toxicokinetics metabolism No specific information is available and distribution Based o
23. vicing with the exception above operational inspections When storing for long periods it is recommended the unit is cleaned with fresh water Page 10 of 24 Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 d Kb Underwater Technology 9 Product Recycling Disposal Within the EU all electronic components and batteries must be taken for separate collection at the end of their working life under EU WEEE directives Applied Acoustics as a manufacturer within the EU will responsibly dispose of any returned end of life Applied Acoustics components batteries through a registered WEEE scheme In order to prevent uncontrolled waste disposal and promote re cycling please return any end of life Applied Acoustic components postage paid by sender to our UK head office Please contact Tech Support for a RMA number prior to shipping Page 11 of 24 Streamer Hydrophone Operation Manual d AN APPLIED ACOUSTICS HYD 000 00 8000 1 d Kb Underwater Technology 10 Fault Identification and Rectification Loss of data quality and electrical failure are the main faults that occur as a result of mechanical damage or component failure These are generally identified by inspection or whilst acquiring sub bottom data Environmental conditions can affect the performance of the hydrophone Below is a simple guide to identifying common faults that can occur Symptoms e Intermittent or no data received on hydrophone Possible Causes
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