Teledyne 440 - Table 6-15: Tritech Seaking Bathy Format

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6 – Operating Procedure

DPN 402196 Issue 4.1 © Teledyne TSS 6- 39

Table 6-15: Tritech SeaKing Bathy format

Notes:

1. The SDC 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.

Main Page

Table of Contents3
Contents4
List of Figures9
List of Tables13
Revision History15
Glossary17
Introduction19
Migration from the 340 Cable and Pipe Survey System - Summary of Benefits19
Conventions Used20
System Description21
Principle of Operation22
Warranty22
Product Support23
System Overview25
Figure 2-1: Components of the 440 System25
Unpacking and Inspection26
Table 2-1: Components of the 440 Pipe and Cable Survey System26
Surface Components27
Surface Display Computer (SDC) 1027
Figure 2-2: Surface Display Computer (SDC10) Overview27
Sub-Sea Components29
Power Supply Unit29
Sub-Sea Electronics Pod30
Search-Coils31
Altimeter31
Physical Installation33
Surface Display Computer (SDC) Installation33
Figure 3-1: SDC10 Transit Case - Lid Removal34
Sub-Sea Installation35
SEP and PSU35
Figure 3-2: SDC10 - Panel PC Fixings35
Coil Array37
Figure 3-3: SEP and PSU Mounting Arrangement37
Search-Coil Configuration38
Positioning the Search-Coils38
Figure 3-4: Coil Separation Distance39
Coil Assembly and Installation40
Figure 3-5: Components of the Coil Frame41
Figure 3-6: Assembly of the Coil Frame42
Figure 3-7: Coil Fixing and Use of Spacers for Coil Arrangement44
Altimeter45
Figure 3-8: Effects of Altimeter Horizontal Offset45
Installation Check-List46
Electrical Installation47
Sub-Sea Components47
Figure 4-1: System Interconnection Diagram48
Table 4-1: System Interconnection Details48
Ground Connections49
Care of Sub-Sea Connectors49
Power Supply Pod49
Power Requirement50
Table 4-2: Power and Communications Cable50
Sub-Sea Electronics Pod51
Search-Coils51
Sub-Sea Altimeter52
Direct Connection to the SEP53
Connection to the SDC53
Surface Display Computer54
Power Connection54
Communication Link SEP to SDC54
Figure 4-2: SDC Rear Comms Module with Key to Ports54
Table 4-3: RS232 Connections for the Altimeter (9-Way D-Type Female Cable)54
Table 4-4: Ideal Twisted Pair Characteristics for Successful Communication55
Table 4-5: Power and Communications Cable - 2-Wire Current Loop Connections56
Table 4-6: Power and Communications Cable - 4-Wire Current-Loop Connections56
Table 4-7: Power and Communications Cable - RS232 Connections56
Alternative Communication Methods57
Figure 4-3: Sepcard Support Block58
Figure 4-4: Link Location on the SEP Main Board58
Table 4-8: SEP Link Header Part Numbers59
Figure 4-5: Comms Selector Switch Positions60
Interface to Data Logger61
Table 4-9: RS232 Connection to SDC 'COM3 (EXT O/P)61
Interface to Video62
Interface to Analogue Outputs62
SDC10 Analogue Output Overview62
Analogue Output DIP Switch Settings63
Figure 4-6: Removing the Transit Case Lid63
Figure 4-7: SDC10 Fixings to Angled Bracket64
Figure 4-8: Removing the Rear Enclosure Fixings64
Table 4.10: Analogue Output DIP Switch Settings64
Operating Software67
Power-On Procedure67
Initial Configuration69
Sub-Sea Electronics Pod69
Figure 5-1: System Configuration Wizard69
Communication Ports70
Figure 5-2: System Configuration Wizard - Summary71
System Parameters72
Target Scaling72
Figure 5-3: System Parameters72
Threshold73
Seawater Compensation73
Print Configuration75
Figure 5-4: Print Configuration75
Operating Deepview for Windows76
Menu Commands77
Table 5-1: Deepview Menu Commands77
View Menu80
Run Window80
Figure 5-5: Deepview - Run Window80
Toggle Height Scale82
Toggle Swath Width83
Scope and Spectrum Analyser Window83
Figure 5-6: Scope Window83
System Errors Window84
Figure 5-7: System Errors Window84
Table 5-2: System Errors Format84
Terminal Window85
Figure 5-8: Terminal Window85
Table 5-3: Terminal Window Toolbar85
Video Overlay Enable86
Configuration Menu86
System Parameters86
Altimeter86
Figure 5-9: Altimeter Configuration86
Table 5-4: Altimeter Configuration Parameters87
Figure 5-10: Altimeter Test88
External Output89
Figure 5-11: External Output Configuration and Serial Port Menu89
Table 5-5: External Output Configuration89
Load Factory Defaults90
Table 5-6: Factory System Defaults90
Video Overlay Setup91
Figure 5-12: Video Overlay Setup91
Toolbars92
Figure 5-13: Video Overlay Signal92
Figure 5-14: Video Overlay Enable/Disable Button92
Table 5-7: Deepview Toolbar93
Function Keys94
Table 5-8: Run Window Toolbar94
After the Dive95
Figure 5-15: Deepview Function Keys95
Replaying a Log File96
Quality Control96
Figure 5-16: Replay Toolbar Keys96
Table 5-9: Replay Toolbar Function Keys96
System Recovery Procedure97
Required Equipment98
Recovery Procedure Steps98
Figure 5-17: Power Reset Button99
Figure 5-18: Boot Menu99
Figure 5-19: Windows Setup in Progress100
Figure 5-20: Automated Recovery Screen100
Figure 5-21: Select Start Recovery Command101
Figure 5-22: Confirm Recovery102
Figure 5-23: Recovery in Progress102
Reinstall Deepview for Windows Procedure103
PC Software Installation103
Figure 5-24: Recovery Complete before Reboot103
Operating Procedure105
Pre-Survey Preparation105
Training and Availability106
Target Scaling106
Data Collection107
System Installation Requirements107
Pre-Dive Checks108
Mechanical108
Depth Rating108
Coil Installation109
Electrical111
Power111
Cables, Connectors and Coils111
Survey Operations111
Establishing the Survey Configuration114
Target Scaling114
Threshold114
External Logging Format115
Serial Port Parameters115
Background Compensation Reminder115
Altimeter Parameters115
Coil Mapping116
Save and Print the Configuration116
Pre-Dive Checks116
Coil Insulation Test117
Target Detection Test117
Oscilloscope Test117
Altimeter Test117
Background Compensation and Monitoring118
Seawater Compensation120
Background Noise Profile120
The Survey Operation120
Interpreting the Run Display Screen120
Data Logging123
Replay Logged Data124
Data Quality125
Profile125
Figure 6-1: Example of a Target Profile Modified Using Quality Control Information126
External Logging Format127
Table 6-1: External Co-Ordinates and Signals Format - CM Resolution127
Table 6-2: External Co-Ordinates and Signals Format - MM Resolution129
Table 6-3: QC Check Code Meaning - External Logging Format130
Figure 6-2: Quality Code Areas131
Figure 6-3: Vertical Range and Offset Distances131
Figure 6-4: Vertical Range with Weight Coating Thickness132
Table 6-4: External Co-Ordinates Format132
Table 6-5: Timestamped Coordinates Format133
Internal Logging Format134
Table 6-6: Internal Co-Ordinates Format134
Table 6-7: Internal Signals Format135
Background Noise Profile Logging Format136
Table 6-8: Background Noise Logging Format136
Target Scaling137
Target Scaling Procedure137
Altimeter Data Format139
Benthos PSA 916139
Figure 6-5: the Effects of Roll on Measurement Accuracy139
Datasonics PSA 900 and PSA 9000140
Ulvertech Bathymetric System140
Table 6-10: Altimeter Output Format - Teledyne TSS and Datasonics140
Table 6-11: Altimeter Output Format - Datasonics with Pressure Transducer140
OSEL Bathymetric System141
Table 6-12: Altimeter Output Format - Ulvertech Bathymetric System141
Table 6-13: Altimeter Output Format - Simrad UK90141
Tritech Seaking Bathy 704142
Table 6-14: Altimeter Output Format - OSEL Bathymetric System142
Table 6-15: Tritech Seaking Bathy Format143
Operational Considerations145
Operating Performance145
Sources of Error145
ROV Handling146
ROV Position over the Target146
Figure 7-1: Altimeter Errors During Trench Surveys146
Trim147
Figure 7-2: ROV Roll Errors147
Skew148
Altimeter Positioning148
Figure 7-3: ROV Skew Errors148
Figure 7-4: Effects of Altimeter Mounting Position149
Electrical Interference150
ROV Body150
Power-Carrying Cables151
Impressed-Current Cathodic Protection151
Rovs151
Speed of Operation152
Altitude above the Seabed152
Manipulators and Probes152
Tracked ROV153
System Specifications155
Specifications156
Surface Display Computer156
Sub-Sea Electronics Pod156
Sub-Sea Power Supply Pod157
Search Coil Array158
Performance159
Table 8-1: Standard Pipeline Diameter = 0.27M (10 Inch)160
Table 8-2: Standard Pipeline Diameter = 0.11M (4 Inch)161
Table 8-3: Cable Diameter = 0.025M (1 Inch)162
Table 8-4: Umbilical Diameter = 0.11M (4 Inch)162
Update Rate163
Maintenance165
Circuit Description165
Figure 9-1: Simplified Interconnection Diagram165
Power Supply Pod166
Power Supply PCB166
Figure 9-2: PSU Interconnection Diagram166
Filter Assembly167
Sub-Sea Electronics Pod168
Main Board168
Driver Board168
Analogue Board168
Communications Loop169
Disassembly and Reassembly169
Figure 9-3: Simplified Schematic of the Current-Loop169
Surface Display Computer170
Sub-Sea Installation170
Sub-Sea Electronics Pod170
Power Supply Pod172
Fault Identification173
Fault on Single Channel Only175
Current Loop Communications Failure177
Figure 9-9: Communications Failure - CHART 4180
Altimeter Failure181
Unexpected Signal Variation During Normal Operation184
System Drawings187
Electrical Drawings187
Table 10-1: Electrical Drawings187
Figure 10-1: 490232-1 Sub-Sea Electronics Pod188
Figure 10-2: 401178-1 Main Board189
Figure 10-3: 401178-2 Main Board - Processor190
Figure 10-4: 401178-3 Main Board - Analogue AD & da191
Figure 10-5: 401178-4 Main Board - Timing and Comms192
Figure 10-6: B929935-1 Main Board - Piggy-Back Board193
Figure 10-7: 401181-1 Driver Board194
Figure 10-8: 401181-2 Driver Board - Control195
Figure 10-9: 401181-3 Driver Board - MOSFETS196
Figure 10-10: 401071-1 Analogue Board197
Figure 10-11: 401071-2 Analogue Board - Control198
Figure 10-12: 401071-3 Analogue Board - Pre-Amps199
Figure 10-13: 401050-1 PSU Filter Assembly200
Figure 10-14: 490228-1 Power Supply Pod - 110V Version201
Mechanical Drawings202
Table 10-2: Mechanical Drawings202
Figure 10-15: SDC10 Dimensions203
Figure 10-16: 400604-1 Power Supply Chassis Assembly204
Figure 10-17: 400667-1 Main Chassis Assembly205
Figure 10-18: 400667-2 Main Chassis Assembly206
Figure 10-19: 401181-1 Driver PCB Assembly207
Figure 10-20: 401071-1 Analogue PCB Assembly208
Figure 10-21: 400654-1 PSU Filter Assembly209
Figure 10-22: 490232-1 Processor Pod Assembly210
Figure 10-23: 490228-1 Power Supply Pod Assembly - 110V Version211
Figure 10-24: 500045-1 Coil Mounting Frame212
Figure 10-25: B930892-1 Coil Assembly213
Figure 10-26: 601004-1 Coil Cable Assembly214
Figure 10-27: B930473-1 PSU to ROV (PWR/COMMS) Cable - 3.0M215
Figure 10-28: 601824-1 Teledyne TSS Altimeter 250 Cable Assembly - 3.0M Standard216
Figure 10-29: 601203-1 Benthos Altimeter Cable Assembly - 3.0M Standard217
Figure 10-30: 500268-1 440 Pipe and Cable Survey System Complete Assembly218
A Operating Theory219
Pulse Induction219
Waveform Measurement220
Figure A-1: Pulse Induction Waveforms (Not to Scale220
Timing221
Figure A-2: Timing Relationship for a Single Cycle of Measurement221
Derivation of Signal Voltage222
Seawater Rejection222
Introduction222
Figure A-3: Sequence of Consecutive Measurement Cycles222
Compensation: How It Works223
Figure A-4: Seawater Signal223
Background Compensation224
Active Compensation224
Figure A-5: Perfect Lift with the Results Passing through the Origin225
Figure A-6: Example of Poor Background Compensation225
Checking the Rejection226
Figure A-7: Example with Metal Present on the Seabed During Compensation226
Figure A-8: Example Where the Vehicle was Not Moved Smoothly226
Rejection Parameters227
Background Noise Profile227
Figure A-9: Background Noise Profile Window227
Trenching Vehicles228
Limitations228
Figure A-10: Typical Lift Curves with a Fixed Target Present228
Range Determination229
B Options231
Dualtrack System231
The Equipment232
The Differences232
Scope of Delivery233
Figure B-1: Surface Display Computer (SDC10233
Figure B-2: Sub-Sea Components of the Teledyne TSS 350 or 350 Powertrack Systems234
Figure B-3: Sub-Sea Components of the Teledyne TSS 440 System234
Table B-1: Components of the Dualtrack System234
Physical Installation235
Search-Coils235
Sub-Sea Pods236
Electrical Connection236
Figure B-4: Electrical Interconnection of Sub-Sea Components237
System Configuration239
System Operation239
Forward Search Window240
Figure B-5: Deepview for Windows: Forward Search Window240
Power Supply Requirement241
Training241
C Altimeter243
Table C-1: Benthos PSA-916 Part Numbers243
Table C-2: TSS ALT-250 Part Numbers243
D Reference245
Target Scaling Procedure247
Target Scaling Results249
Performance Envelope Results251
Survey Details253
System Configuration Details253
E Index255

Teledyne 440 - Table 6-15: Tritech Seaking Bathy Format

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