Gemini 620pd Profiling User manual

Gemini Profiling System
0695-SOM-00001, Issue: 03 1© Tritech International Ltd.
Gemini Profiling System
Product Manual
0695-SOM-00001, Issue: 03

Gemini Profiling System
0695-SOM-00001, Issue: 03 2© Tritech International Ltd.
© Tritech International Ltd
The copyright in this document is the property of Tritech International Ltd. The document is supplied by Tritech International Ltd on the
understanding that it may not be copied, used, or disclosed to others except as authorised in writing by Tritech International Ltd.
Tritech International Ltd reserves the right to change, modify and update designs and specifications as part of their ongoing product development
programme.
All product names are trademarks of their respective companies.

Gemini Profiling System
0695-SOM-00001, Issue: 03 3© Tritech International Ltd.
Table of Contents
Help & Support ........................................................................................................ 6
Warning Symbols ..................................................................................................... 7
I. Introduction to the System ................................................................................... 8
1. Introduction .................................................................................................. 9
1.1. General Overview ............................................................................. 9
1.2. Communications ............................................................................... 9
1.3. Using with the Tritech SCU ........................................................... 10
2. Example Survey Setup .............................................................................. 11
3. Integrating with Survey Software .............................................................. 12
II. Gemini Profiler Head ........................................................................................ 13
4. Gemini Profiler Specification .................................................................... 14
4.1. Dimensions (Forward Facing Unit) ................................................ 14
4.2. Dimensions (Downward Facing Unit) ............................................ 14
4.3. Acoustic Properties ......................................................................... 15
4.4. Electrical and Communications ...................................................... 15
4.5. Physical Properties .......................................................................... 15
4.6. Sonar Head Pin-Out Diagrams ....................................................... 16
4.6.1. Burton 5506-1508 (Main Port) ............................................ 16
4.6.2. Burton 5506-1506 (Auxiliary Port) ..................................... 16
4.7. Cable Specification ......................................................................... 17
4.7.1. Ethernet Cable ..................................................................... 17
4.7.2. VDSL Cable ........................................................................ 17
4.7.3. RS232 Cable ........................................................................ 18
4.8. Offsets ............................................................................................. 19
5. Gemini Profiler Installation ....................................................................... 20
5.1. Installing the Sonar Head ............................................................... 20
5.2. Electrical & Communication Notes ................................................ 21
6. Care & Maintenance of the Gemini Profiler ............................................. 23
6.1. After using the sonar ...................................................................... 23
6.2. If storing the sonar for extended periods ........................................ 23
6.3. Regular maintenance ...................................................................... 23
III. Gemini Hub ..................................................................................................... 24
7. Gemini Hub Specification ......................................................................... 25
7.1. Dimensions Gemini Hub ................................................................ 25
7.2. Physical ........................................................................................... 25
7.3. Electrical and Communication ....................................................... 25
7.3.1. PPS and RS232 Connectors ................................................ 26
7.3.2. Ethernet Configuration ........................................................ 26
7.3.3. VDSL Configuration ........................................................... 27
8. Gemini Hub Installation ............................................................................ 28
8.1. Overview ......................................................................................... 28
8.2. Mounting the Hub .......................................................................... 28
8.3. Electrical and Communication ....................................................... 29
9. Care & Maintenance of the Gemini Hub .................................................. 31
IV. Gemini Software .............................................................................................. 32
10. Gemini Software Installation ................................................................... 33

Gemini Profiling System
0695-SOM-00001, Issue: 03 4© Tritech International Ltd.
10.1. System Requirements ................................................................... 33
10.2. Installing the Gemini Software ..................................................... 33
10.3. Configuring the Gemini Sonar ..................................................... 33
10.3.1. Check the operation of the Gemini sonar .......................... 34
11. Network Configuration ............................................................................ 35
12. Gemini Software Operation ..................................................................... 36
12.1. Getting Ready to Use the Software .............................................. 36
12.2. Keyboard Shortcuts ...................................................................... 36
12.3. Basic Controls on Advanced Screen ............................................ 37
12.3.1. Online Button ..................................................................... 37
12.3.2. Record Button .................................................................... 39
12.3.3. Player Controls .................................................................. 39
12.3.4. Capture Screen ................................................................... 41
12.3.5. Record as .WMV ............................................................... 41
12.3.6. Invert Display (Up/Down) ................................................. 42
12.3.7. Flip Image (Left/Right) ..................................................... 42
12.3.8. Draw Grid .......................................................................... 42
12.3.9. Zoom Button ...................................................................... 42
12.3.10. Log Directory Selector .................................................... 43
12.3.11. Sound Velocity Indicator ................................................. 44
12.3.12. Palette Selector ................................................................ 44
12.3.13. Gain Assist ....................................................................... 44
12.3.14. Gain Control .................................................................... 45
12.3.15. Range Control .................................................................. 45
12.3.16. Indicators .......................................................................... 45
12.3.17. Scan Sector ...................................................................... 46
12.3.18. Measurements .................................................................. 47
12.4. Advanced Controls on Advanced Screen ..................................... 47
12.4.1. Choose and Position the Equipment .................................. 47
12.4.2. Units ................................................................................... 48
12.4.3. Sound Velocity .................................................................. 48
12.4.4. Compression ...................................................................... 49
12.4.5. Inter-ping ............................................................................ 50
12.4.6. Reset to Defaults ............................................................... 50
12.4.7. Gain Settings ...................................................................... 50
12.4.8. Beam Setup ........................................................................ 51
12.4.9. Digitisation ......................................................................... 52
12.4.10. VDSL Settings ................................................................. 53
12.4.11. Modify Device Network Details ...................................... 53
12.4.12. Settings & Display Tabs .................................................. 53
12.5. Serial Data Input ........................................................................... 54
12.5.1. Sensors ............................................................................... 54
12.5.2. Gemini Hub ....................................................................... 54
12.5.3. COM Ports ......................................................................... 56
V. Troubleshooting and Appendices ..................................................................... 58
Troubleshooting .............................................................................................. 59
A. Setting the computer IP address in Windows XP ..................................... 62
B. Setting the computer IP address in Windows 7 ........................................ 64

Gemini Profiling System
0695-SOM-00001, Issue: 03 5© Tritech International Ltd.
C. Setting the Gemini Device IP Address in Gemini Software ..................... 66
D. Gemini Software String Decode ............................................................... 67
E. Optional Surface Adapters ........................................................................ 68
E.1. Dimensions ..................................................................................... 68
E.2. Ethernet Adapter ............................................................................ 68
E.3. VDSL Adapter ............................................................................... 69
Glossary .................................................................................................................. 70

Gemini Profiling System
0695-SOM-00001, Issue: 03 6© Tritech International Ltd.
Help & Support
First please read this manual thoroughly (particularly the Troubleshooting section,
if present). If a warranty is applicable, further details can be found in a Warranty
Statement at the end of the manual.
Tritech International Ltd can be contacted as follows:
Mail Tritech International Ltd
Peregrine Road
Westhill Business Park
Westhill, Aberdeenshire
AB32 6JL, UK
Telephone ++44(0)1224 744 111
Fax ++44(0)1224 741 771
Email [email protected]
Website www.tritech.co.uk
Prior to contacting Tritech International Ltd please ensure that the following is
available:
1. The Serial Numbers of the product and any Tritech International Ltd equipment
connected directly or indirectly to it.
2. Software or firmware revision numbers.
3. A clear fault description.
4. Details of any remedial action implemented.
Contamination
If the product has been used in a contaminated or hazardous environment
you must de-contaminate the product and report any hazards prior to
returning the unit for repair. Under no circumstances should a product be
returned that is contaminated with radioactive material.
The name of the organisation which purchased the system is held on record at
Tritech International Ltd and details of new software or hardware packages will be
announced at regular intervals. This manual may not detail every aspect of operation
and for the latest revision of the manual please refer to www.tritech.co.uk
Tritech International Ltd can only undertake to provide software support of systems
loaded with the software in accordance with the instructions given in this manual. It
is the customer's responsibility to ensure the compatibility of any other package they
choose to use.

Gemini Profiling System
0695-SOM-00001, Issue: 03 7© Tritech International Ltd.
Warning Symbols
Throughout this manual the following symbols may be used where applicable to
denote any particular hazards or areas which should be given special attention:
Note
This symbol highlights anything which would be of particular interest to
the reader or provides extra information outside of the current topic.
Important
When this is shown there is potential to cause harm to the device
due to static discharge. The components should not be handled without
appropriate protection to prevent such a discharge occurring.
Caution
This highlights areas where extra care is needed to ensure that certain
delicate components are not damaged.
Warning
DANGER OF INJURY TO SELF OR OTHERS
Where this symbol is present there is a serious risk of injury or loss of life.
Care should be taken to follow the instructions correctly and also conduct
a separate Risk Assessment prior to commencing work.

Gemini Profiling System
0695-SOM-00001, Issue: 03 8© Tritech International Ltd.
Part I
Introduction to the System

Gemini Profiling System
0695-SOM-00001, Issue: 03 9© Tritech International Ltd.
1. Introduction
1.1. General Overview
The Gemini 620pd Profiling sonar is a multibeam echo sounder with a wide field of
view and rapid update rate able to provide quick feedback to the user.
The Gemini Hub is a rack mountable interface capable of driving two sonar heads,
connecting to a network via Ethernet and bringing in sensor data via RS232.
The Gemini Software is a special application which processes the data from Gemini
sonars and is capable of outputting this data across a network to be used within survey
software packages.
A Gemini Profiling System will comprise the Gemini Profiler, Gemini Hub and
Gemini Software. This manual will detail how to set this system up and cover
operation of the Gemini Software. It does not detail how the data from the Gemini
System will be used within the survey software.
1.2. Communications
There are two connection options, 100Mbit·s-1 Ethernet and VDSL. The sonar will
automatically detect which connection is available and switch to that connection (a
different cable is required, see Section 4.7, “Cable Specification”).
The VDSL option allows a single twisted pair to be used for communication to/from
the sonar at high speeds dependent on the length and quality of the cable. The Tritech
International Ltd supplied VDSL Hub takes the two wire VDSL input and bridges it
to Ethernet for simple connection to a PC.
VDSL maximises the data rate by testing the quality of the connection at start up and
adapting the speed accordingly. With VDSL there is a trade off between link speed
and noise immunity. There is a setting in the software that allows optimisation to cope
with the level of noise introduced by other parts of the system. The sonar can cope
with some electrical noise on the link but it may reduce the image transfer rate.
Note
When using an Ethernet connection the Gemini can fully utilise a
100Mbit·s-1 link while returning the sonar data. If it is to share an Ethernet
link with other high bandwidth devices, such as video cameras, it is
recommended that the 100Mbit·s-1 devices share a Gigabit link to the
surface to reduce possible network congestion.

Introduction Gemini Profiling System
0695-SOM-00001, Issue: 03 10 © Tritech International Ltd.
1.3. Using with the Tritech SCU
The Tritech International Ltd Surface Control Unit (SCU) is a specially designed
rack mountable computer containing embedded software for use with Tritech
International Ltd sonar equipment. The Gemini range require a higher specification
of hardware than other Tritech products so will only work with the later versions of
the SCU from SCUv5 onwards (either Windows XP or Windows 7 versions).
The profiling heads should be connected to the SCU through a Gemini Hub or
Ethernet/VDSL adapter.
If integrating the SCU into a network (as illustrated in Chapter 2, Example Survey
Setup) then depending on the configuration it may necessary to use a SCU with an
additional network interface fitted or use an external network switch.

Gemini Profiling System
0695-SOM-00001, Issue: 03 11 © Tritech International Ltd.
2. Example Survey Setup
Note
Tritech International Ltd are able to supply the Gemini Profilers, Gemini
Hub and a Surface Control Unit (SCU) but all other hardware shown will
be supplied by other manufacturers and is therefore not supported in any
depth within this documentation.

Gemini Profiling System
0695-SOM-00001, Issue: 03 12 © Tritech International Ltd.
3. Integrating with Survey Software
Documentation is available from Tritech International Ltd detailing the steps
necessary to properly integrate the Gemini Profiler system with external survey
packages. For advice please contact Tritech International Ltd providing the details
for the survey package which is being used or alternatively visit www.tritech.co.uk
and download the relevant manuals.

Gemini Profiling System
0695-SOM-00001, Issue: 03 13 © Tritech International Ltd.
Part II
Gemini Profiler Head

Gemini Profiling System
0695-SOM-00001, Issue: 03 14 © Tritech International Ltd.
4. Gemini Profiler Specification
4.1. Dimensions (Forward Facing Unit)
Not to scale, dimensions in mm.
120
318
336
Ø140
225
Ø145
50
80
4.2. Dimensions (Downward Facing Unit)
Not to scale, dimensions in mm.
456
474
Ø140
Ø145
50
98
170

Gemini Profiler Specification Gemini Profiling System
0695-SOM-00001, Issue: 03 15 © Tritech International Ltd.
4.3. Acoustic Properties
Acoustic Properties
Operating Frequency 620kHz
Number of Channels 96
Angular Resolution 1.0° acoustic, 0.5° effective
Scanning Sector 130°
Number of Beams 256
Vertical Beamwidth 1°
Range 1.5 to 120m
Scan Rate 2-50Hz (inter-ping time dependent)
Range Resolution 10mm (range dependent)
4.4. Electrical and Communications
Electrical and Communications
Power Consumption 37W max (range dependent, head unit only)
Supply Voltage 20 - 75V DC
Data Communications Ethernet (up to 80m) or VDSL (up to 1000m)
VDSL Cable Length
Maximum length for VDSL and power is 300m, if power is provided
locally (e.g., by the ROV) then maximum cable length for VDSL
communication only is 1000m.
4.5. Physical Properties
Physical Properties
Property Titanium Body
Weight 14.6kg air, 9.5kg water (forward facing unit)
19kg air, 13kg water (downward facing unit)
Depth Rating 4000m
Materials Titanium (6 AL-4V)
Finish Bead blasted
Operating Temperature -10 to 35°C
Storage Temperature -20 to 50°C

Gemini Profiler Specification Gemini Profiling System
0695-SOM-00001, Issue: 03 16 © Tritech International Ltd.
4.6. Sonar Head Pin-Out Diagrams
Note
Pin-out diagrams show pin orientation of the connector face on the sonar
head.
4.6.1. Burton 5506-1508 (Main Port)
Pin Function Diagram
1 Ethernet RX +
2 Ethernet RX -
3 Ethernet TX +
4 DC +
5 VDSL +
6 Ethernet TX -
7 DC Ground (0V)
8 VDSL -
5506-1508
4.6.2. Burton 5506-1506 (Auxiliary Port)
Pin Function Diagram
1 RS232 RX
2 RS232 TX
3 DC +
4 DC Ground (0V)
5 RS232/TTL Ground
6 TTL IN 5506-1506

Gemini Profiler Specification Gemini Profiling System
0695-SOM-00001, Issue: 03 17 © Tritech International Ltd.
4.7. Cable Specification
4.7.1. Ethernet Cable
For an Ethernet connection, the supplied cable is described below and should be
terminated with an appropriate connector for the intended application.
Note
Ethernet connection requires a shielded cable (of CAT5e standard) for the
entire cable run (max 80m), lengths of untwisted cable around connectors
must be kept to an absolute minimum. Untwisted lengths will cause poor
or intermittent operation.
This should be connected to the Burton 5506-1508 (Main port) on the sonar head.
Ethernet Cable Specification
Burton 55A1-1508 Cable Colour
& Specification
Function
1 Red UTP#2 (24AWG) Ethernet RX +
2 White UTP#2 (24AWG) Ethernet RX -
3 Blue UTP#1 (24AWG) Ethernet TX +
4 Red (20AWG) DC +
6 White UTP#1 (24AWG) Ethernet TX -
7 Black (20AWG) DC Ground (0V)
Minimum dynamic bend radius 130mm (static 36mm)
4.7.2. VDSL Cable
A VDSL connection requires only one twisted pair from the sonar to the surface
housed within a 4 core shielded cable.
Note
The signal path should have a characteristic impedance of 110Ω (±10Ω)
for the entire cable run for optimal performance.
This should be connected to the Burton 5506-1508 (Main port) on the sonar head.

Gemini Profiler Specification Gemini Profiling System
0695-SOM-00001, Issue: 03 18 © Tritech International Ltd.
VDSL Cable Specification
Burton 55A1-1508 Cable Colour
& Specification
Function
4 Red (20AWG) DC +
5 Blue UTP#1 (24AWG) VDSL +
7 Black (20AWG) DC Ground (0V)
8 White UTP#1 (24AWG) VDSL -
Minimum dynamic bend radius 129mm (static 35mm)
4.7.3. RS232 Cable
The Burton 5506-1506 (Auxiliary port) is designed for use as an interface for
auxiliary sensors and is able to provide power and communicate using the RS232
protocol. The cable should be shielded.
RS232 Cable Specification
Burton 55A1-1506 Cable Colour
& Specification
Function
1 Red UTP#2 (24AWG) RS232 RX
2 White UTP#2 (24AWG) RS232 TX
3 Red (20AWG) DC +
4 Black (20AWG) DC Ground (0V)
5 White UTP#1 (24AWG) RS232/TTL Ground
6 Blue UTP#1 (24AWG) TTL In
Minimum dynamic bend radius 130mm (static 36mm)

Gemini Profiler Specification Gemini Profiling System
0695-SOM-00001, Issue: 03 19 © Tritech International Ltd.
4.8. Offsets
The centre line for any offset measurements is considered to be the middle of the
receive transducer face as shown.
Port
Receive (RX)
Transmit (TX)
0°Starboard
The view shows the sonar head as it would look from underneath the survey vessel
with the front of the vessel at the top of the page, i.e., the sonar transmitter to the fore
with the port side correctly aligned on the left.
Note
This offset datum applies to both forward and downward facing variants.

Gemini Profiling System
0695-SOM-00001, Issue: 03 20 © Tritech International Ltd.
5. Gemini Profiler Installation
5.1. Installing the Sonar Head
The sonar should be mounted with the transducers facing toward the scene to be
profiled (typically the seabed). The scanning sector is orientated with the arc of the
transmitter and the vertical beamwidth is at right angles to this arc, such that side and
end-on views of the sonar cone are as follows:
For Vessel Installations
The profiling heads can be installed over the side of the survey vessel or within a
moon pool if one is available. Installation within a moon pool will provide a more
stable operating environment but it must be ensured that the sonar path to the seabed
is clear and not obstructed by the vessel hull.
For over the side installation the profiling heads would normally be mounted such that
the connector end-cap is facing the stern and have to be mounted to a rigid mounting
on the side of the vessel.