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Teledyne HydroPACT 350, Руководство пользователя

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DPN 402197 Issue 7.1

© Teledyne Limited

C- 1

C Cables and Tones

The target cable must carry a suitable tone signal before the 350 system can detect it. This tone signal
should have the following characteristics:

❐

It should be easy for the 350 system to identify it among other signals that the target cable or
other cables in the survey area might be carrying.

❐

It should have a frequency within a ‘quiet’ part of the pass band of the 350 system.

❐

The tone current should be of sufficient amplitude to provide a signal that is above the back-
ground noise level.

The 350 system can survey cables of any length. You may improve the effectiveness of the system if
you select a suitable tone frequency and current for the specific cable. This appendix offers some basic
advice on a method for injecting a tone onto a target cable so that you may use the 350 system to
perform the survey.

A tone generator can be supplied for use with the 350 system. Contact Teledyne Limited for advice if
necessary.

C.1 Tone Injection

To perform a survey on a cable, the 350 system can use any tone frequency up to a maximum of
200Hz. In theory therefore, the system could be used to survey a live power cable because of the
mains frequency ‘tone’ that it carries. In practice however this may not be possible or desirable for the
following reasons:

❐

The tone must be single-phase.

❐

There may be many local sources of interference at the same frequency.

By injecting a tone onto a cable, you may select a frequency in the range 10Hz to 200Hz that is
relatively free from interference.

C.1.1 Frequency Selection

Selection of a suitable tone frequency and current will depend upon specific circumstances. Note the
following guidelines:

Generally, a low frequency is better for long cable runs and a high frequency is better for short cable
runs.

To avoid strong interference affecting the survey, the 350 system provides some advanced signal
monitoring facilities. These allow you to examine the spectrum and to set a tone frequency in a region
of relatively low background noise.

Table C-1: Effects of tone frequency choice

Advantage

Disadvantage

Increased
tone fre-
quency

Increased detection ranges available from the
350 system.

Decreased transmission distance for the tone
along the cable length.

Increased
tone current

Increased detection ranges available from the
350 system.

Increased noise generation in repeaters of
fibre-optic cables.

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Содержание HydroPACT 350

Страница 1: ...tice and does not represent a commitment on the part of Teledyne Ltd All drawings technical content and the intellectual property associated with this manual is property of Teledyne Ltd No content should be copied or distributed in any way without the express permission of the company Document Part Number 402197 Issue 7 1 Date January 2019 Teledyne Marine International Avenue ABZ Business Park Dyc...

Страница 2: ...ay 2 4 2 2 2 2 Mounting the coil array 2 6 2 2 3 Altimeter Installation 2 10 2 2 4 Installation Checklist 2 11 2 3 Electrical Installation 2 11 2 3 1 Ground Connections 2 13 2 3 2 Care of Subsea Connectors 2 13 2 3 3 Subsea Electronics Pod 2 14 2 3 3 1 Power requirement 2 14 2 3 3 2 Alternative Communication Methods 2 15 2 3 3 3 Changing communication settings in the SEP 2 17 2 3 4 Sensing Coils 2...

Страница 3: ...nable 3 19 3 3 3 Configuration Menu 3 19 3 3 3 1 System parameters 3 19 3 3 3 2 Altimeter 3 19 3 3 3 3 External data logging 3 22 3 3 3 4 Load factory defaults 3 22 3 3 3 5 Video overlay setup 3 23 3 3 4 Toolbars 3 24 3 3 5 Function Keys 3 26 3 4 Replaying a Log File 3 27 3 5 Quality Control 3 27 3 6 Reinstall DeepView Procedure 3 28 4 Operating Procedure 4 1 4 1 Pre Survey Preparation 4 1 4 1 1 T...

Страница 4: ... roll pitch and skew 5 3 5 2 1 3 Slope 5 4 5 2 2 Electrical Interference 5 5 5 2 2 1 The ROV 5 5 5 2 2 2 Vibration 5 5 5 2 2 3 Power carrying cables 5 6 5 2 2 4 Impressed current cathodic protection 5 6 5 2 2 5 Operating over ferrous rock dumps 5 6 5 2 2 6 Earth return path 5 6 5 2 2 7 Curved target course 5 7 5 3 ROVs 5 7 5 3 1 Speed of Operation 5 7 5 3 2 Altitude above the Seabed 5 7 5 3 3 Trac...

Страница 5: ...Update Rate 7 6 A Operating Theory A 1 A 1 Electromagnetic Fields A 1 A 2 Field Detection A 1 A 3 Signal Isolation A 2 A 4 Calculation A 2 B Options B 1 B 1 Systems B 1 B 1 1 Coils B 1 B 1 2 Subsea pods B 1 B 1 3 Topside computer B 1 B 1 4 Altimeter B 1 B 1 5 Cables B 1 B 1 6 Other B 2 B 2 Dualtrack System B 2 B 2 1 The Equipment B 2 B 2 2 The Differences B 3 B 2 3 Scope of Delivery B 5 B 2 4 Phys...

Страница 6: ... C 1 2 3 Fibre optic cables C 3 C 1 2 4 General connection requirements C 3 C 1 3 Seawater Return Path C 3 D Coil Tester D 1 D 1 Pre Operation D 1 D 1 1 Coil Calibration Constants D 1 D 2 Operation D 2 D 2 1 Frequency Selection D 4 D 3 Fault Identification D 5 D 4 Battery Replacement D 5 D 5 Maintenance D 6 D 6 Specification D 6 E Reference E 1 E 1 Survey Details E 2 E 2 System Configuration Detai...

Страница 7: ...hreshold does not apply to vertical coils 3 5 Figure 3 4 Print Configuration 3 7 Figure 3 5 DeepView Run Window 3 11 Figure 3 6 DeepView Forward Search Window 3 14 Figure 3 7 Scope Window 3 16 Figure 3 8 Spectrum Analyser Window 3 16 Figure 3 9 System Errors Window 3 17 Figure 3 10 Terminal Window 3 18 Figure 3 11 Altimeter Configuration 3 20 Figure 3 12 Altimeter Test 3 21 Figure 3 13 External Ou...

Страница 8: ...ic flux A 1 Figure A 2 Frequency windows A 2 Figure B 1 Sub sea components of the Teledyne TSS 350 System B 5 Figure B 2 Sub sea components of the Teledyne TSS 440 System B 6 Figure B 3 Electrical interconnection of subsea components B 7 Figure C 1 Tone injection Short cables C 2 Figure C 2 Tone injection Long cables C 2 Figure D 1 350 System Parameters Configuration screen D 2 ...

Страница 9: ...nternal logging format Survey co ordinates 4 9 Table 4 6 Internal logging format Forward search mode 4 10 Table 4 7 Internal logging format Signals packet 4 11 Table 4 8 Altimeter output format Benthos PSA 916 4 12 Table 4 9 Altimeter output format Teledyne TSS and Datasonics 4 13 Table 4 10 Altimeter output format Datasonics with pressure transducer 4 13 Table 4 11 Altimeter output format Ulverte...

Страница 10: ...uary 2016 Minor update SEP weight and dimensions updated Figure 10 12 updated 3 4 June 2014 ECR 4242 3 3 November 2013 ECR 4187 3 2 October 2013 ECR 4172 3 1 June 2013 ECR 4108 and revised formatting 3 0 November 2012 ECR 3782 2 6 June 2012 ECR 3762 2 5 January 2010 ECR 3406 2 4 15 01 2008 Added 350 Coil Tester section to Appendix E 2 3 14 06 2007 Updated default comms to RS232 2 2 16 02 2006 Corp...

Страница 11: ... the top of the target and the centre line of the coil array Positive measurements indicate a target to starboard of the centre line PSU Subsea power supply pod The depth rated unit that accepts an electrical supply from the ROV and produces the conditioned and stabilised d c supplies used by the SEP ROV Remotely operated vehicle Any form of sub sea or surface vehicle supporting the 350 system dur...

Страница 12: ... that signal important Warnings Cautions and Notes WARNING A Warning indicates the risk of death or serious injury to personnel CAUTION A Caution indicates the risk of injury to personnel or damage to equipment or loss of data NOTE A Note emphasises important information about the use of the product Throughout this manual unless stated otherwise all measurements conform to the SI standard of units...

Страница 13: ...nection between the topside computerand the ROV umbilical C Power and data cable or ROV Tail that connects the SEP to the ROV umbilical and power distribution system D Subsea electronics pod SEP E Port and starboard coil connection cables F Port and starboard coil triads These each include three identical coils arranged so that the starboard triad is a mirror image of the port triad G Altimeter co...

Страница 14: ...tions necessary to generate accurate survey data with no need for additional processing by the topside computer Optionally you may use the 350 system as part of a Dualtrack installation In this mode a single topside computer controls the operation of the 350 system when its subsea components are connected to a TSS 440 Pipe and Cable Survey System Refer to section B 1 6 for instructions to connect ...

Страница 15: ...for repair The use of improper packaging for shipping any part of this equipment may invalidate the warranty For information about the proper return location and pro cedure contact Teledyne Limited or an authorised distributor 1 5 Product Support For questions about installing your product or any other product operating enquiry contact our technical support See our website at www teledynemarine co...

Страница 16: ...l visual examination of all sub assemblies and inspect them for any damage that might have occurred during transportation Notify Teledyne Limited immediately if there are parts or sub assemblies missing from your shipment If you see any damage to the system file a claim with the insurers and inform Teledyne Limited The cover of this manual lists the contact details for Teledyne Limited Teledyne Li...

Страница 17: ... This block provides a safe and secure method to mount the housing to the ROV frame CAUTION Do not attempt to secure the SEP housing directly to the ROV framework without using the mounting block Omitting the mounting block may cause damage to the surface of the housing leading to corrosion The mounting block has machined slots that allow you to strap the complete housing and block assembly firmly...

Страница 18: ...the ROV trim Tighten the mounting straps firmly so that the SEP housing cannot move under the influence of ROV vibration or currents in the water Figure 2 1 SEP mounting arrangement 2 2 2 Coil Array CAUTION The coils contain no user serviceable parts Do not open them When choosing a location for the coil array consider the following All vertical range measurements to the target position are relati...

Страница 19: ... critical to the cor rect operation of the 350 System There are two numbers stamped onto the end cap of each sensing coil These numbers are the four digit serial number and the five digit calibration constant Record these numbers for use during the system configuration procedure described in section 3 2 Appendix E includes a suitable form to record these details You will need to refer to the follo...

Страница 20: ...the lateral coil C so that the 8 way connector is towards the left hand side of the centre block as shown Place the coil into the groove so that the head of the M5 screw engages with the recess in the coil body 4 Place a clamping block B against the coil and insert four M8 50mm bolts F Use a 6mm hex agonal key to tighten the bolts evenly until the block supports the coil properly Do not over tight...

Страница 21: ...Assemble the port coil triad in the same order Note that the port coil triad is a mirror image of the starboard The lateral coil must be oriented and assembled with its 8 way connector pointing to the right The fore aft coil must be located in the left hand side of the centre block during assembly with its 8 way connector pointing towards you 2 2 2 2 Mounting the coil array CAUTION If you mount th...

Страница 22: ...e of 500mm from both ends so that in these areas the bar has an octagonal cross section The bar has a receptacle groove 170mm long machined at the centre of one face Make certain this receptacle is at the bottom when you install the bar onto the ROV The receptacle is there to accept a Teledyne TSS altimeter if one is being used Figure 2 4 Coil array mounting bar The following are also provided Two...

Страница 23: ... four M8 bolts lightly Do not tighten these bolts fully until you have installed the complete coil array and you have set the coil separation distance 4 Follow the same procedure and fit the starboard coil triad to the starboard end of the mounting bar 5 The design of the mounting bar allows you to adjust the distance between the coil triads while maintaining their alignment Slide the two coil tri...

Страница 24: ...LL DIMENSIONS ARE REFERENCE 352 352 352 352 349 352 MOUNTING BLOCK ASSEMBLY 4 9 kg MOUNTING BLOCK ASSEMBLY 4 9 kg MOUNTING BAR 10 0 kg LATERAL COILS 3 7 kg EACH FORE AFT COILS 3 7kg EACH COIL SEPARATION MIN 1000 MAX 5000 COIL ARRAY VERTICAL REFERENCE COIL SEPARATION REFERENCE MARK ON LABELS PORT COIL ARRAY STARBOARD COIL ARRAY COIL ARRAY LATERAL REFERENCE COIL ARRAYS MIN 500 FROM ROV COIL ARRAY FO...

Страница 25: ...ement of depth of cover caused by horizontal offset between the altimeter and the centre of the coil array In the example shown in Figure 2 7 there are altimeters located at A and B Because of the seabed topography beneath the ROV both altimeters supply different measurements of altitude Note that although the measurements of target position supplied by the 350 System remain accurate errors in dep...

Страница 26: ...oil array Make certain there is less than 1 0 metres vertical offset between the altim eter and the coil array 2 3 Electrical Installation WARNING There is a risk of death or serious injury by electric shock when you work on the electrical distribution system of the ROV Only a competent engineer who has the relevant training and experience must make any connections to the ROV electrical distributi...

Страница 27: ...he ROV electrical distribution system D All sub sea connections are to sealed ports on the SEP You must fit a proper blanking plug to any port that does not have a connector before you deploy the System underwater E The coil connection cables each have a single 12 way connector for connection to the SEP and three 8 way right angled connectors for connection to the detection coils You must connect ...

Страница 28: ...le any electrical coupling in the subsea installation inspect the pins and receptacles of all connectors for signs of damage contamination or corrosion To ensure reliable operation and to extend the life of the subsea installation take the following precautions to care for the sub sea connectors used throughout the 350 system 1 Keep both the connector and socket free from debris and salt build up ...

Страница 29: ...ck installation See Appendix B for instructions CAUTION Water could enter the SEP through any port that does not have a connector fitted To avoid damage from water ingress you must fit the correct blanking plug supplied by TSS to protect any unused port on the SEP Tighten the connector locking collars by hand only do not over tighten these connectors 2 3 3 1 Power requirement The SEP requires an e...

Страница 30: ...ethods WARNING There is a risk of death or serious injury by electric shock when you work inside he SEP Only a competent engineer who has the relevant training and experience should open any part of the 350 system Power off and isolate the equipment from the mains supply voltage before you open any part of the 350 system Observe all relevant local and national safety regulations while you perform ...

Страница 31: ...s of good quality 2 wire 20mA digital current loop If the umbilical cable is of good quality experience has shown that you may use this communication method successfully through transmission distances up to 1000 metres NOTE If you need to select a different communication method change the settings of links inside the SEP before you install it on board the ROV When you configure the system to use t...

Страница 32: ...mble and reassemble the SEP you will need the following tools and facilities A clean anti static work area A 3mm hexagonal key A 2 5mm hexagonal key Remove the Power Comms end cap 1 Use the 3mm hexagonal key to release and remove the four M4 12mm A4 stainless steel screws that secure the end cap to the housing 2 Use the 2 5mm hexagonal key to remove the two button head screws from their threaded h...

Страница 33: ...d receptacle apart Remove the coil connector end cap 1 Remove the four M4 12mm A4 stainless steel screws as before Substitute two of these screws in place of the two button head screws to jack the end cap away from the SEP housing Remove the jacking screws from the end cap 2 Remove the end cap carefully note that it carries all the circuit board assemblies Handle this assembly with care Pull the e...

Страница 34: ...ean or renew them if necessary Apply a thin smear of approved lubricant to the rings to ensure they make an efficient seal when you reassemble the SEP For this purpose use the same type of lubri cant that you use for the subsea electrical connectors refer to sub section section 2 3 2 for instructions 2 Orientate the circuit board assemblies on the support block 3 Place the empty SEP housing left t...

Страница 35: ...fficult to replace Do not apply excessive force 10 Insert the four M4 12mm A4 stainless steel screws and use the 3mm hexagonal key to tighten them evenly Insert both button head screws and tighten them lightly 2 3 4 Sensing Coils Each coil triad includes three identical but electrically independent sensing coils aligned mutually at right angles and supported in a purpose designed mounting block Yo...

Страница 36: ...f the ROV Avoid introducing any sharp bends or other points of mechanical stress along the cable Connect the cable to the Altimeter port of the SEP Tighten the knurled locking collar by hand only Do not overtighten this connector 2 3 5 2 Connection to the topside computer Use this method to connect all other types of altimeter compatible for use with the HydroPACT 350 system These altimeters use R...

Страница 37: ...rough the 9 way D type male serial communication port labelled COM2 The pin designations for the 9 way D type ports are as follows Table 2 4 RS232 connection to COM2 Altimeter signal SDC COM2 pin connection RS232 data from altime ter Pin 2 receive RS232 data to altimeter Pin 3 transmit Necessary for use only with the OSEL Bathymetric System where communications must be bi directional RS232 common ...

Страница 38: ...the initialisation sequence Provided the software launches successfully you will see the DeepView opening splash screen The software will then search for an initialisation file that includes details of the previous operating configuration If the software finds the initialisation file and the topside computer receives data packets from the SEP that are compatible with that file then it will begin t...

Страница 39: ... options for setting the SEP type No SEP Use this option to operate DeepView with no SEP connected This might be necessary for example if you wish to use DeepView to replay data on a separate PC 350 Use this option to control a stand alone 350 system Dualtrack Use this option to control a Dualtrack system comprising an interconnected 440 and 350 sys tem controlled from the same topside computer Yo...

Страница 40: ...e communication parameters COM5 is used by the topside computer to communicate with the video overlay card DeepView allows you to set the communication parameters for each of the serial ports Choose settings that are appropriate for the connected equipment refer to the technical manuals of the attached equipment if necessary Note that the standard communication parameters for COM1 the communicatio...

Страница 41: ...es the configuration details automatically in an initialisation file when DeepView is closing down This allows the system to establish the same configuration when you next power on the topside computer provided it recognises the data format arriving from the SEP as being compatible with the stored configuration details This means that you should power on the SEP before you launch DeepView 3 2 3 Sy...

Страница 42: ...possible 360 minutes The default setting is 30 minutes A setting of zero switches off the reminder facility 3 2 3 3 Threshold Threshold is an absolute value in microvolts The 350 system considers targets to be out of range if signals from them are below the threshold setting You should determine the correct setting for the threshold empirically considering the level of noise present in the survey ...

Страница 43: ...ation constants for each of the six coils together with their serial numbers and locations The Configuration Log form in Appendix E includes a suitable space for you to record these details The system is supplied with the coil triads already assembled and with DeepView configured with the relevant calibration details Use the System Parameters window to check the calibration values are correctly co...

Страница 44: ...rding these details 3 3 Operating DeepView This section explains how to use the software commands and tools during a survey The instructions refer to the Run Window and to the various secondary windows described throughout this section DeepView includes an on line Help structure that summarises the advice and instructions included here There is also a simple Help panel accessible by pressing funct...

Страница 45: ...an have up to 255 characters They can include spaces but must exclude the characters and A button on the DeepView toolbar also performs the same function as this command Close Log File Ctrl F3 If you have an internal logging file open use this command to close it Once you have closed the file you cannot open it again to add more data Backup Configura tion This will prompt you with a dialog box to ...

Страница 46: ...ndow to be closed when you start DeepView Note that the data string transmitted from the SEP to the topside computer extends significantly in length when you open the Scope and Spectrum Analyser Window This will reduce the data update rate You should therefore keep this window closed unless you require it System Errors Win dow Use this command to open or close the System Errors Window described in...

Страница 47: ...actory defaults This will eliminate any user parameters that have been previously configured Video Overlay Setup Shift F10 See section 3 3 3 5 for a description of the video overlay feature System Configura tion Wizard Ctrl F10 This selection will return you to the set up options screen that you have viewed when opening up the software Use of this option will result in all of the parameters being ...

Страница 48: ...mation that it shows Figure 3 5 DeepView Run Window Help DeepView ALT H D Use this command to open the on line Help structure that explains the features of DeepView The Help structure also includes some simple fault finding advice for the sub sea components Pre dive Checklist ALT H P Use this command to open the on line Help structure that explains the checks you should make on the 350 system befo...

Страница 49: ...V altitude above the seabed If the design of the ROV allows you to configure the 350 system with a fixed coil height the seabed indicator will remain fixed at this altitude The Run Window includes a series of data fields that indicate the instantaneous measurements of coil altitude ALT F above the seabed lateral offset LAT G of the target relative to the centre line vertical range to the target VR...

Страница 50: ...t moves outside the lateral range of the display swath width the pipe will turn red increase the swath width to rectify this Status bar The status bar N located directly below the snail trail pane alerts you to the operating status of DeepView and the 350 System It includes the following information Communication status This shows the DeepView operating mode 440 or 350 and the validity of serial c...

Страница 51: ...on a track that intercepts the charted course of the target cable It is most effective when the heading of the ROV is approximately perpendicular to the track of the cable Used in this way the 350 system will detect the target ahead of the ROV and will display an estimate of the forward range between the coil array and the target NOTE The forward range estimate relies upon information supplied by ...

Страница 52: ...X and target Y in the vertical direction The process of estimating the forward range of the target requires the system to assume that the target is uncovered and lying on the seabed For this reason the target represented by the grey cross is always shown on top of the line representing the seabed The vertical scale of this diagram Z can be changed using the Toggle Height Scale in the View menu or ...

Страница 53: ...d a vertical scale of percentage of full scale or V In the example above the panels are showing a variety of timebase scales Unless the signal from the target cable is very strong you are unlikely to see a clearly defined sine wave oscillogram Figure 3 8 Spectrum Analyser Window The above screen shows an example of the 350 Spectrum Analyser Window with panels for six active channels This shows the...

Страница 54: ...frequency set in the survey parameters see section 3 2 3 1 to that present on the cable The threshold is also shown as a horizontal dotted line In the drawing this is at the default setting of 100µV NOTE Using and understanding the Spectrum Analyser Window is critical to setting up and using the 350 system It allows a check to be made that the tone frequency can be distinguished from background no...

Страница 55: ...formation message The System Errors Window includes a status line that has two data fields These show the total number of cleared and uncleared errors since you started DeepView 3 3 2 5 Terminal Window The Terminal Window shown in Figure 3 10 allows you to send and view data to and from the SEP and the altimeter It has a toolbar a client area that displays black text against a white background and...

Страница 56: ...u to change the altimeter configuration for specific installations and to view data transmitted by an altimeter connected directly to the SEP To view data transmitted by an altimeter connected to an SDC serial communication port use the Terminal Window described in section 3 3 2 3 Table 3 3 Terminal Window toolbar Button Function Explanation Enable Disable SEP polling This button has a toggle acti...

Страница 57: ...e the Altimeter Configuration Window to set appropriate parameters for your altimeter Table 3 4 Altimeter configuration parameters Parameter Options Altimeter Disabled Fixed coil height Sub sea TSS PSA 900 PSA 900 depth PSA 9000 PSA 916 Ulvertech Bathy Simrad UK90 OSEL Bathy SeaKing Bathy 704 Hyspec 305 ...

Страница 58: ...Altimeter Test Altimeter comms Altimeter connected via Subsea Electronics Pod for altimeters marked and above Altimeter connected direct to a COM port for altimeters marked and all other altimeters above Fixed coil alti tude If there is no altimeter fitted and the design of the ROV allows the coils to remain at a fixed altitude above the seabed enter this altitude in centimetres Altimeter off set ...

Страница 59: ...In 350 mode the system always outputs a sentence which combines the signal and coordinate information See section 4 3 1 for a description of these data formats Output Rate The SDC can transmit data to the data logger at either four records or one record per second The default setting is four records per second You should consider the available storage space and the desired linear track resolution ...

Страница 60: ...arget position are overlaid The positions and colours of each of these elements can be fully controlled by the user Figure 3 14 Video Overlay Setup Dependent upon the user s requirements they can enable disable specific information As shown they are also able to set the colours of Text Signal Bars Signal Trail and LAT Bar modify video mode and input output connection These additional options provi...

Страница 61: ...Window See section 3 3 5 for a list of all the available function keys that you may use in the 350 mode Table 3 7 DeepView Toolbar Button Function and Function key Explanation Terminal Window This button performs the same function as the View Terminal Window command described above The button has a toggle action so that the window will open and close with alternate presses The normal condition is ...

Страница 62: ...is not relevant to the 350 system It will be available if you are operating the 350 as part of a Dualtrack installation refer to the 440 system manual for further details Background com pensation This button is not relevant to the 350 system It will be available if you are operating the 350 as part of a Dualtrack installation refer to the 440 system manual for further details Video overlay Functio...

Страница 63: ... part of the DeepView on line Help support Press any key to close the help dialog panel Figure 3 17 DeepView function keys NOTE Function key combinations CTRL F6 CTRL F7 and F5 are valid only when you use the 350 System in a Dualtrack installation 3 4 Replaying a Log File When you start to replay a log file an additional tool bar appears at the top of the run window Help This button has a toggle a...

Страница 64: ...appears on the screen to identify the reason for quality control failure The output strings to an external data logger include the quality control indicator and identifica tion number The two digit identification number allows post processing engineers to identify the quality control failure See section 4 5 1 for details of the QC check code The extremities of the Quality Control envelope are as f...

Страница 65: ... that the vertical range to target or the lateral offset has exceeded pre defined limits The post processing engineers can use this flag to help them analyse the acquired data more easily 3 6 Reinstall DeepView Procedure Follow these steps to reinstall DeepView 1 Select the Windows Start menu and then select Control Panel and Programs and features 2 Select the DeepView for Windows entry in the lis...

Страница 66: ...a particular survey application 4 1 1 Training When used properly the 350 system 350 System is a precision survey tool that provides valuable and detailed survey data to describe the track of a conductive target through the survey area It is in the interest of the Survey Planners to ensure that appropriate personnel attend one of the Teledyne TSS training courses Two levels of 350 training course ...

Страница 67: ...ey should consider The type of ROV to be used and where the SEP and the coils will be mounted The 350 system is suitable for use on most types of ROV including towed sleds TSS can offer further advice if necessary Which communication method to use between the SEP and the topside computer This will depend upon the characteristics of the umbilical cable Whether to use an altimeter or a rapid update ...

Страница 68: ...of the 350 system and check that the topside computer receives signals correctly on all channels Repeat this test with the ROV in the water Perform an altimeter test and check that the SEP or topside computer receives data packets correctly from the altimeter Repeat the test in water Details of the pre dive checks are also available in the DeepView on line help system 4 3 During the survey 1 Check...

Страница 69: ...ing the system configuration details that were taken at the start and at the end of the survey Any other information requested by the survey planning team 4 3 2 Replay Logged Data NOTE You cannot use DeepView to replay externally logged files To replay a previously logged data file you have to select Open Close Replay file F2 from the file option from within DeepView This will provide you with the...

Страница 70: ...in them with the survey records 2 Close the logging files Select File Close Log File to close the internal log file if you have made one during the sur vey Command the external data logger to stop logging data from the 350 system 3 Exit DeepView Select File Exit to exit the program If necessary use Windows Explorer to copy the internally logged file to a separate disk to accompany the survey recor...

Страница 71: ...utput format Survey Mode Notes 1 The Start character is a colon ASCII 3Ah 2 S ASCII 60h identifies survey mode packet 3 The Quality Control QC flag will be a space character when RESET or a question mark ASCII 3Fh if set See also the QC code later in this packet 4 The lateral offset LAT is measured from the centre of the coil array Positive values indicate a target to starboard of the centre line ...

Страница 72: ...get Skew is positive when ROV heading is to star board of the target direction 9 The signal strengths in microvolts measured on channel 1 starboard lateral SL channel 2 starboard vertical SV channel 3 port lateral PL channel 4 port vertical PV channel 5 starboard fore aft SF and channel 6 port fore aft PF Information included in the above signal strength fields may have a very large dynamic range ...

Страница 73: ...hen RESET or a question mark when SET See also the QC check code later in this packet 4 The forward search range FWD is measured from the reference line of the coil array identi fied in Figure 3 2 There are several conditions that will cause the field to contain question marks The target is out of range The 350 System cannot compute an accurate position for the target 02 Target in range SL or PL 5...

Страница 74: ... using scientific notation 7 The QC check code provides additional status information that explains any occurrence of the QC flag being set The check code consists of a two digit number with the meanings defined in Table 4 4 4 5 2 Internal Logging Format Data packets transmitted by the SEP fall into two categories co ordinates and signals The SEP transmits them sequentially so that either packet A...

Страница 75: ...positive There are several conditions that will cause the field to contain question marks The target is out of range The 350 system cannot compute an accurate position for the target Coil saturation has occurred because the tone signal is too strong Skew angle between the target and the ROV in the range 90 to 90 Zero skew is the ideal situation where the ROV aligns on the same heading as the direc...

Страница 76: ...s that will cause the field to contain question marks The target is out of range The 350 system cannot compute an accurate position for the target Coil saturation has occurred because the tone signal is too strong Skew angle between the target and the ROV in the range 90 to 90 Zero skew is the ideal situation where the ROV aligns on the same heading as the direction of the target Skew is positive ...

Страница 77: ... 3 5 2 for instructions to connect one of these alternative types of altimeter to the topside computer You may connect a TSS Benthos or Datasonics unit either to the topside computer COM2 port or directly to the SEP Altimeter port You must configure the display software to use your altimeter type See section 3 3 3 2 for instructions to do this The descriptions below include the individual data for...

Страница 78: ... at 2400 baud using 7 data bits 1 start bit 1 mark bit and 1 stop bit Table 4 9 Altimeter output format Teledyne TSS and Datasonics If the Datasonics PSA 900 includes the optional pressure transducer the data string becomes Table 4 10 Altimeter output format Datasonics with pressure transducer 4 6 3 Ulvertech Bathymetric System The Ulvertech Bathymetric system transmits data at 9600 baud using 8 d...

Страница 79: ...e rate that it measures depth It there fore includes the altitude field twice in each data packet separated by a space character Both altitude fields will contain similar values because it is unlikely the altitude will change signifi cantly during the short interval between the two measurements 2 The contents of these output data fields are set externally and have no effect on operation of the Hyd...

Страница 80: ...r case D from DeepView before it transmits each data string The communication link between the OSEL altimeter and the topside computer must therefore be bi directional DeepView transmits the interrogating character automatically when configured to use the OSEL altimeter 4 6 6 Tritech SeaKing Bathy 704 The SeaKing Bathy system transmits data continuously using RS232 communications at 9600 baud ...

Страница 81: ...s 1 DeepView performs the following calculation to calculate the altitude above the seabed Altitude Altimeter reading 200ns velocity of sound 2 For example if the count were 162712 then Altitude 162712 200ns 1475 2 24 000 metres This is the true distance from the transducer face of the altimeter to the seabed ...

Страница 82: ... material can distort the magnetic fields that the 350 system uses to survey the target There is usually an abundance of such materials in the ROV body You should install the coil array where it is at least 0 5 metres away from the ROV body The installation instructions provided in this manual describe a configuration of the 350 system that combines ease of deployment with optimal performance Summ...

Страница 83: ...the depth of cover measurements are accurate Flying with lateral offset In Figure 5 2 b the lateral offset of the ROV has placed the altimeter to one side of the target so that it measures its altitude above one of the trench walls Consequently the altimeter deliv ers information that will not allow accurate assessment of the depth of target cover It is therefore important to ensure that You insta...

Страница 84: ...r a target located centrally beneath the coil array as shown the displayed value for lateral offset will contain an error as follows Error Z sin Roll angle Where Z is the vertical distance between the coils and the target For example measurements on a target located 1 0 metre below the centre of the coil array will include a lateral offset error of 0 17 metres with 10 of roll applied to the ROV Me...

Страница 85: ...his situation Figure 5 4 Sloping target In Figure 5 4 the coil array A measures the shortest distance to the target C Similarly the measurements of ALT will be the shortest distance between the altimeter and the seabed within the beamwidth of the altimeter B The depth of cover COV VRT ALT However because the seabed is sloping the measurements of VRT and ALT are valid for different locations on the...

Страница 86: ...w of frequencies with the tone at its centre However where noise levels centred on the tone frequency are very high they might degrade the performance of the 350 system and affect the accuracy of its survey measurements The Scope and Spectrum Analyser Window will show those bands where noise is at a minimum You may then adjust the frequency of the target tone to fall within one of these quieter ba...

Страница 87: ... checks on signal quality and on the signal to noise ratio within DeepView If cathodic protection currents present a problem arrange to switch off the current while you perform the target survey The interference will disappear immediately although the protection afforded by the current will remain for some time afterwards 5 2 2 5 Operating over ferrous rock dumps Operating the 350 system over a fe...

Страница 88: ...um specified depth rating The standard installation described in this manual provides a high degree of accuracy and a useful measurement range together with ease of deployment It is important to install the 350 system properly by following the instructions included throughout this manual The system will supply valid survey data only if you follow these installation and operating instructions which...

Страница 89: ...DPN 402197 Issue 7 1 5 3 3 Tracked ROV You may install the 350 system on tracked ROVs This type of ROV should allow you to set a fixed coil height If you mount the system on an ROV of this type locate the coils approximately one metre above the seabed ...

Страница 90: ... pod the topside computer an altimeter optional and associated cabling This is summarised in Figure 6 1 Figure 6 1 Components of the 350 system Table 6 1 Components of the 350 system Item Description A Topside computer B Data cable for connection between the topside computer and the ROV umbilical C Power and data cable or ROV Tail that connects the SEP to the ROV umbilical and power distribution s...

Страница 91: ...0 system NOTE E Coil triad cable F Coil triad G Power and data cable that connects the altimeter to the SEP H Subsea altimeter Table 6 2 Connections to the coil cable Sensing coil 8 way connector SEP 12 way connector Description Pin No Pin No Description G0 Pre amp gain control line 1 1 G0 Pre amp gain control line G1 Pre amp gain control line 2 2 G1 Pre amp gain control line Signal Lateral 3 3 La...

Страница 92: ...rect See section 3 2 3 for details of the System Parameters dialog 3 Check that you have connected all cables correctly 4 Check that the correct electrical supplies are available to the topside computer and the SEP 5 Identify the fault symptoms as clearly as possible and apply the appropriate fault identification routine from the following list Fault on a single channel only see section 6 3 1 Comm...

Страница 93: ...l failure Contact Teledyne TSS Power off the system Swap out the coil cable Is the channel working Renew the faulty coil cable Swap out the coil on the faulty channel Is the channel working Renew the faulty coil Swap out the SEP Is the channel working Renew the faulty SEP Single channel fault Yes No Yes No Yes No ...

Страница 94: ...ms LED on Use terminal mode to check SEP comms Comms OK LED or wiring failure Contact Teledyne TSS Power off the system Disconnect the SEP power comms cable Continuity check the cable and umbilical Connect an a c voltmeter across pins 1 3 Power on the system 11ϱV ϭ0 OK Check the mains power supply source Yes No No Yes Look for 230V instead if your SEP operates from a 230V supply ...

Страница 95: ...nce Contact Teledyne TSS All coils OK See flowchart for fault on a single channel Coil connections OK Connect coils correctly Coil separation 1 4m Increase coil separation Poor tracking performance No Yes No Yes No Yes Is tone noisy Use a different tone frequency Yes No System setup OK Reconfigure system correctly No Yes ...

Страница 96: ...r manual for specific servicing details Figure 6 5 Altimeter failure Select terminal mode icon from toolbar Ensure 350SEP selected Screen updates okay Clear comms problem Select altimeter config then press altimeter test Data OK from altimeter Comms from altimeter is good Press OK to end test Altimeter failure Check correct altimeter type is selected Is altimeter updating Altimeter is good Renew t...

Страница 97: ...34 S 350 pod 110V a c 3 000m rated 490235 S 350 pod 230V a c 3 000m rated 490055 S 350 pod 110V a c 6 000m rated 490085 S 350 pod 230V a c 6 000m rated TSS Part Number Description B934982 S 350 housing assembly 3 000m rated B934983 S 350 housing assembly 6 000m rated TSS Part Number Description B934992 S 350 pod to coil end cap assembly 3 000m rated B934993 S 350 pod to coil end cap assembly 6 000...

Страница 98: ...TSS Part Number Description B933640 SDC10 Surface Display Computer B934805 RMC10 Rackmount Computer TSS Part Number Description 500292 ALT 250 3 000m rated B345420 ALT 250 6 000m rated TSS Part Number Description B930476 350 coil triaxial cable 5m B930473 A C input cable 3m B930477 Dualtrack cable 2 5m 601824 ALT 250 altimeter cable 3m B934985 350 pod cable harness set TSS Part Number Description ...

Страница 99: ...cs Pod Allow up to 300mm extra for connector clearance 7 1 2 Search Coil 110V a c 3 000m 230V a c 3 000m 110V a c 6 000m 230V a c 6 000m Size Ø148 468mm Weight In air 12 7kg In water 4 4kg Input voltage 110 120V a c 45 65Hz 220 240V a c 45 65Hz 110 120V a c 45 65Hz 220 240V a c 45 65Hz Maximum power demand Dual track installation 3 1A 1 8A 3 1A 1 8A Communication RS232 2 wire 20mA current loop 4 w...

Страница 100: ...197 Issue 7 1 Teledyne Limited 7 2 7 2 Performance Figure 7 1 defines the vertical range measurement accuracy of the 350 system for the stated conditions of tone current i e 30mA at 25Hz Figure 7 1 Vertical range measurement accuracy ...

Страница 101: ...he largest cable loop that could be laid in the available area see Figure 7 2 Equipment for use in the trials procedure included A standard Teledyne TSS HydroPACT 350 system A hydraulic platform to support the coils of the 350 system A loop of wire 60 metres in diameter as shown in Figure 7 2 A Teledyne TSS Tone Generator to supply the cable loop with tone current at various ampli tudes and freque...

Страница 102: ...how that the vertical range or the lateral offset indicated by the 350 system was greater than the distance measured using a tape meas ure The response of the 350 system proved to be symmetrical about its central axis The following tables therefore show only the response to the port side Lateral offsets vertical range and errors are all listed in units of centimetres o s signifies that the 350 sys...

Страница 103: ...l range Lateral offset 800 600 400 300 250 220 200 180 160 140 120 100 80 60 40 20 0 500 129 95 58 27 27 28 26 22 15 14 10 10 9 7 6 2 1 400 89 74 37 12 12 11 9 6 4 4 2 4 5 4 0 3 5 350 72 64 34 11 11 7 3 2 1 1 2 2 1 3 4 7 8 300 48 44 24 7 5 2 0 2 1 2 3 2 2 1 5 8 11 250 19 34 22 7 4 3 1 0 1 2 4 3 4 4 4 4 6 200 29 27 16 4 2 1 2 3 1 4 5 4 2 1 2 1 7 180 o s o s 15 4 2 1 1 2 3 5 5 5 3 2 1 2 6 160 o s 10...

Страница 104: ...you analyse the survey data Table 7 2 Lateral measurement errors Vertical range Lateral offset 800 600 400 300 250 220 200 180 160 140 120 100 80 60 40 20 0 500 48 1 13 12 18 12 8 9 10 5 3 3 3 1 1 5 400 9 3 19 13 16 12 8 1 12 4 5 4 5 1 2 5 350 9 14 14 13 15 12 8 9 11 4 5 4 5 1 2 5 300 45 28 18 15 15 12 8 9 9 4 4 4 4 1 3 6 250 146 46 17 15 14 14 8 9 9 4 4 4 4 2 3 6 200 239 60 22 18 16 14 10 10 9 3 ...

Страница 105: ... current In this example the conductor appears in cross section with conventional current flow rising upwards out of the page As the current begins to flow lines of magnetic flux expand concentrically from the centre of the conductor with their polarity in an anti clockwise direction as shown The strength of the flux varies inversely with distance from the conductor When the amplitude of current v...

Страница 106: ...e A 2 shows the tone frequency at 33Hz A 4 Calculation By using an array of two coil triads the 350 System avoids potential sources of measurement error caused by changes in the amplitude of the tone signal Calculations performed by the 350 System provide three modes of operation 1 Survey mode The SDC displays the vertical range to target and the lateral offset of the target relative to the centre...

Страница 107: ...A 3 Teledyne Limited DPN 402197 Issue 7 1 You may pass measurements made using any available mode to an external data logger for subsequent analysis ...

Страница 108: ...DC10 TSS Part Number Description B933650 350 coil 1 off 500322 350 coil set 7 off including mounting kit TSS Part Number Description 490234 O 350 pod 110V a c 3 000m rated 490235 O 350 pod 230V a c 3 000m rated 490055 O 350 pod 110V a c 6 000m rated 490085 O 350 pod 230V a c 6 000m rated TSS Part Number Description B933640 SDC10 Surface Display Computer B934805 RMC10 Rackmount Computer TSS Part Nu...

Страница 109: ...information in the relevant product manual NOTE You must consider the Manuals for the Teledyne TSS 440 and the 350 systems valid in all respects except for those areas listed in sub section B 2 2 below It is recommended that all personnel who will install use and maintain the equipment should read and thoroughly understand the 350 and 440 manuals B 2 1 The Equipment The Dualtrack equipment describ...

Страница 110: ...Delivery See section B 2 3 for a list of the standard items supplied with the Dualtrack system 2 Physical installation See section 2 2 of this manual for instructions to install the subsea components of the 350 system See the 440 manual for instructions to install the subsea components of the 440 System You must take special precautions regarding the placement of the search coils when you install ...

Страница 111: ...350 systems simul taneously DeepView allows you to switch between the 440 and the 350 operating mode easily and quickly The Run Window and its status bar will show the current operating mode 5 Power requirement See section B 2 6 for details of the power supply requirements for the subsea components of the Dualtrack system ...

Страница 112: ...rt and the starboard coil triads G Port and starboard coil triads H 440 to 350 link cable The cable is 2 5 metres long and has waterproof connectors at both ends HydroPACT 350 system Figure B 2 I Subsea power supply pod J Subsea electronics pod K Coil array comprising three 440 search coils L Three connection cables with waterproof connectors for the array of search coils M Subsea altimeter with c...

Страница 113: ...ctions included in the 440 manual to install the mounting frame and the coil array of the 440 system CAUTION With drive current applied to the coils of the 440 system large induced voltages can appear across the coils of the 350 system Later versions of the 350 search coils serial numbers from 570 and upwards include diodes to protect them from damage caused by these induced voltages If your syste...

Страница 114: ... that you should interconnect the subsea components exactly as described in Figure B 3 and the instructions below Figure B 3 Electrical interconnection of subsea components CAUTION To avoid damage to either of the SEPs make certain that you fit the blanking plugs to any unused ports 350 Sub sea Components 440 Sub sea Components Power Comms cable 440 to 350 Link Cable Length 2 5m TSS P N 930477 POW...

Страница 115: ... described in this manual Connect the Teledyne TSS 350 subsea components 4 Route the coil connection cables to the correct ports on the 350 SEP Use plastic cable clips to secure the cables to the ROV framework 5 Connect the 350 SEP to the ROV electrical supply CAUTION You might cause permanent damage to the sub sea installations of the 440 or the 350 system if you operate them from an incorrect el...

Страница 116: ...igure that system IMPORTANT You must select Dualtrack as the SEP type even if you intend to use only one of the systems during the survey 2 Take care to enter all details completely and correctly Set appropriate altimeter offsets for the 440 and the 350 systems B 2 5 2 System Operation 1 Refer to this manual and the 350 manual for instructions to use DeepView in its 440 and 350 modes 2 Use the sel...

Страница 117: ...nominal electrical supply or 1 8A at 230V a c nominal electrical supply B 3 Training The Teledyne TSS HydroPACT 350 system is a precision front line survey tool To exploit the full potential of the system all personnel involved with a survey that uses the 350 system from the initial planning stages to final data presentation should possess a sound understanding of the performance of the system and...

Страница 118: ...200Hz In theory therefore the system could be used to survey a live power cable because of the mains frequency tone that it carries In practice however this may not be possible or desirable for the following reasons The tone must be single phase There may be many local sources of interference at the same frequency By injecting a tone onto a cable you may select a frequency in the range 10Hz to 200...

Страница 119: ...es As shown in Figure C 2 the conductors possess some small capacitance to the environment that surrounds the cable If the cable is long greater than approximately 100km then the tone signal will find a return path through the distributed capacitance Cc of the cable The impedance of this path reduces as the tone frequency increases Figure C 2 Tone injection Long cables Under these circumstances it...

Страница 120: ...ters along the cable NOTE The 350 system cannot be used to survey a fibre optic cable unless the cable can carry an electrical tone through a conductive core or through its insulated armoured covering C 1 2 4 General connection requirements Always use good grounding connections throughout the installation to avoid introducing mains related frequencies onto the cable You must separate the return pa...

Страница 121: ...ing knowledge of the 350 system and clear understanding of the information outlined in this section prior to using the Coil Tester All instructions outlined in this section should be followed to prevent misuse of or damage to the Coil Tester D 1 Pre Operation Prior to using the Coil Tester Read the complete 350 system manual Install the 350 system according to the instructions provided in Chapter ...

Страница 122: ...D 1 350 System Parameters Configuration screen If a search coil is replaced the new 5 digit value for the calibration constant must be entered for the relevant search coil This will not affect the operation of any of the other remaining search coils Each of the six coil calibration constants will be different and ensure they are entered correctly The numbers include an error checking element helpi...

Страница 123: ...ain have been set a chevron will be displayed on screen 6 Press 4 to enter the Data Window FFT Size Menu Set the tone frequency to 25Hz and press ENTER to accept the selection and return to the Terminal Menu 7 Press 9 to exit the Terminal menu 8 To re establish communication with the 350 system press the Enable disable polling on the Terminal Window toolbar Scrolling data will be displayed on scre...

Страница 124: ...at a frequency of 25Hz After the results have been confirmed toggle through the frequency range to return it to the default scale of 25Hz 14 If the Run Window does not show the expected values follow the guidelines included in Appendix D 5 15 Repeat steps 4 to 12 for the remaining channels of the 350 system 16 After completing the coil test procedure for all six channels restore the 350 system to ...

Страница 125: ...oise mains frequency pickup etc If there are no received signals investigate a possible fault condition by referring to Chapter 6 D 4 Battery Replacement The Coil Tester includes a battery condition LED Press the battery test switch on the coil tester and check the LED first shows orange and then after a short delay shows green The LED should remain green while the switch is pressed to indicate th...

Страница 126: ... ring clean Avoid any cuts nicks or splits on any of the rubber sur faces Renew the connector O ring if it has deteriorated or becomes damaged 2 Lubricate the O rings with a light spray of 3M silicone oil or Dow Corning 111 valve lubricant or equivalent When applying the lubricant oil use only a thin coating D 6 Specification Overall Size 209mm x 92mm Weight inc battery 0 8kg Power Supply PP3 9v 5...

Страница 127: ...contain blank sample copies of forms that you may use to record details about the HydroPACT 350 system before and during a survey You should complete these forms and include copies with the final survey results to help the post processing engineers with their survey analyses ...

Страница 128: ...n Constant PL S N Calibration Constant PV S N Calibration Constant SF S N Calibration Constant PF S N Calibration Constant Coil Separation Distance cm Altimeter Source Altimeter S N Enabled Y N Altimeter Offset cm Fixed coil altitude cm External logging rate per second Target Type Magnitude of tone at source mA Tone frequency Hz Reminder interval mins Threshold setting µV Audible Alarm enabled Y N...

Страница 129: ...ages 4 11 Target coordinates 4 6 4 9 Data logging 3 22 External logging format 4 6 Forward search mode 4 8 Internal logging format 4 9 Replay 3 27 Survey mode 4 6 Depth of target cover see COV Display Software Frequency Spectrum see Spectrum Display Oscilloscope See Oscilloscope Display software Coil calibration 3 6 Configuration file 3 8 Default configuration 3 22 Forward search mode Starting fro...

Страница 130: ...ise 5 5 Vibration 5 5 O Operating theory A 1 Oscilloscope 3 15 P Power Dualtrack see Dualtrack Q Quality Control 3 13 Quality control 3 27 Envelope 3 28 envelope 7 2 flags 4 6 R Run mode Coil drive 3 13 S Saturation 4 9 SDC COM 2 altimeter port 2 21 Communication ports 3 3 Sensor port 2 14 SEP Altimeter port 2 21 Blanking plugs 2 14 2 21 Disassembly and reassembly 2 17 Installation 2 2 Mounting bl...

Страница 131: ... 2019 Teledyne Ltd HydroPACT 350 User Manual Document Part Number 402197 Issue 7 1 Date January 2019 ...

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