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APPLIED ACOUSTICS SYSTEMS Easytrak Nexus Lite 2695 Operation Manual

Ultra-short base line (usbl) underwater acoustic positioning system 2695 series; 1000 series beacon incorporates
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Easytrak Nexus Lite
2695 Series
Operation Manual

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Summary of Contents for APPLIED ACOUSTICS SYSTEMS Easytrak Nexus Lite 2695

  • Page 1 Easytrak Nexus Lite 2695 Series Operation Manual...

  • Page 2: Revision History

    2695 Series Operation Manual EZT-2695-8000/1 Revision History Change Issue Reason for change Date First Issue 25/01/17 Page 2 of 124...

  • Page 3: Table Of Contents

    2695 Series Operation Manual EZT-2695-8000/1 Contents REVISION HISTORY ............................2 1. INTRODUCTION TO THE 2695 EASYTRAK NEXUS ................7 2. BASIC THEORY ............................9 3. SYSTEM DESCRIPTION ........................... 10 2695 C ....................10 ASYTRAK EXUS ONSOLE 2683 E ....................10 ASYTRAK EXUS RANSCEIVER...
  • Page 4 2695 Series Operation Manual EZT-2695-8000/1 Filtering & Gating ..........................46 Gating Description ..........................46 Gating Search Mode ..........................47 Kalman Filter Introduction ........................47 Kalman Filter Settings .......................... 47 Kalman Filter Presets ........................... 48 Saving Kalman Filter Setups ......................... 48 Advanced User Mode ..........................
  • Page 5 2695 Series Operation Manual EZT-2695-8000/1 AAE S ......................94 PREAD PECTRUM HANNELS AAE E ........................95 ASYTRAK HANNELS HPR C ........................... 95 IMRAD HANNELS PAP C ........................96 IMRAD HANNELS PAP C ..................... 97 IMRAD HANNELS ONTINUED ORE T ........................98 RACKPOINT HANNELS 10.
  • Page 6 2695 Series Operation Manual EZT-2695-8000/1 Thank you for choosing Applied Acoustic Engineering as one of your subsea equipment suppliers. We hope you experience many years of reliable operational use from our products. If you do encounter any technical issues with any of our products then please don’t hesitate to contact our Technical Team via the following methods.

  • Page 7: Introduction To The 2695 Easytrak Nexus

    2695 Series Operation Manual EZT-2695-8000/1 1. Introduction to the 2695 Easytrak Nexus This manual provides the user with information on the installation, operation and maintenance of the Easytrak Nexus Lite Ultra-Short Base Line (USBL) underwater acoustic positioning system. † ‡ USBL systems are used to position underwater items including Side Scan Sonars , ROVs , AUVs...
  • Page 8 2695 Series Operation Manual EZT-2695-8000/1 into Easytrak, one for the bearing/ depression angle, and a second for the range calculation. An option is available where the velocity of sound can be calculated using Medwin’s formula by entering water temperature, salinity, and depth. Depth beacons can be used to provide greater positioning accuracy, particularly appropriate at low depression angles where the slightest change can result in a significant shift in the target’s vertical position.

  • Page 9: Basic Theory

    2695 Series Operation Manual EZT-2695-8000/1 2. Basic Theory Easytrak Nexus Lite is an Ultra Short Base Line (USBL) Acoustic Navigation System. The system uses a single compact transducer containing multiple receiving ceramics and an interrogate ceramic. The receiving ceramics are so arranged that each can detect an acoustic signal from a target’s transmission.

  • Page 10: System Description

    Easytrak Nexus Lite consists of a console unit, transceiver, deck cable, user’s PC and up to 8 beacons. Easytrak Nexus Lite 2695 Console Unit Easytrak Nexus Lite is an advanced Ultra Short Baseline (USBL) positioning and tracking system which incorporates Sigma 1 Spread Spectrum Technology to provide a secure acoustic link The Easytrak Nexus Console provides control and peripheral interfaces for the system.

  • Page 11: Installation

    2695 Series Operation Manual EZT-2695-8000/1 4. Installation Software and Driver Installation Minimum System Requirements Operating System: Windows 7, Windows 8, Windows 10 – 64 Bit Only Processor: Intel Core i5 RAM: Disk Space: 50MB Please install software (on supplied CD) before connecting the Easytrak Nexus Lite to the PC To install the software please run the ‘Setup.exe’...

  • Page 12: Easytrak Nexus 2695 Console Unit

    2695 Series Operation Manual EZT-2695-8000/1 Easytrak Nexus 2695 Console Unit Front Panel USB Interface to PC Rear Panel Ensure the console is secured to prevent falling or sliding due to vessel movement. SERIAL PORTS: 4 Serial ports available for external sensor interface, aux inputs and data output. TRANSCEIVER: Connection to the Nexus 2683 Transceiver using the Nexus Deck Cable.
  • Page 13 2695 Series Operation Manual EZT-2695-8000/1 Page 13 of 124...

  • Page 14: Easytrak Nexus 2683 Transceiver Deployment Options

    2695 Series Operation Manual EZT-2695-8000/1 Easytrak Nexus 2683 Transceiver Deployment Options Suspended Pole Mounted Page 14 of 124...

  • Page 15: Pole Mounted - Over The Side

    2695 Series Operation Manual EZT-2695-8000/1 Pole Mounted – Over The Side The Easytrak transducer can be fixed over the side of a ship with a suitable pole. Ensure the transducer is aft of the pole and that the pole doesn’t protrude beyond the face of the transducer. The diameter of the pole will depend on the length required and the anticipated maximum speed of the ship.

  • Page 16: Suspended Over The Side

    2695 Series Operation Manual EZT-2695-8000/1 Suspended Over the Side This is the simplest method of deployment, however, the transducer is prone to relative movement with respect to the vessel. Care must be taken that the transducer does not spin as the internal compass, pitch and roll sensors have a limited dynamic response.

  • Page 17: Deck Cable

    2695 Series Operation Manual EZT-2695-8000/1 Deck Cable Connects the to the . To prevent damage to the cable and EXUS RANSCEIVER EXUS ONSOLE minimise potential problems, please ensure the following points are observed: • Ensure personnel cannot step on, or trip over, the deck cable. •...

  • Page 18: Operation

    2695 Series Operation Manual EZT-2695-8000/1 5. Operation Power Up • Ensuring software is installed and connections are made as Section 4; the Easytrak Nexus Lite can be powered up. • Switch the main power button on the rear panel. The PWR LED will indicate green. •...

  • Page 19: Easytrak Nexus Lite Software

    2695 Series Operation Manual EZT-2695-8000/1 6. Easytrak Nexus Lite Software Overview Menu Bar Task Bar Context Menu Window Area Status Bar The software provides an intuitive user interface to configure, operate and monitor the Easytrak Nexus Lite USBL Tracking system. The system setup, beacon setup and visual preferences can all be saved into individual configuration files.

  • Page 20: Task & Menu Bar

    2695 Series Operation Manual EZT-2695-8000/1 Task & Menu Bar Most commonly used tools and windows are accessible through the following short cuts Save All Configuration Files Edit System Configuration Save System Configuration Open System Configuration Edit Workspace Configuration Display/Hide Event Log Window Display/Hide Placemarks Window Display/Hide Waypoints Window Display/Hide Beacon Data Window...
  • Page 21 2695 Series Operation Manual EZT-2695-8000/1 Power Up Transceiver (only enabled if auto power down has occurred) From the Menu Bar additional functions for system configuration and tools can be found Menu bar File Structure File Windows Tools Help Workspace Open Plot Programming Nexus Console...

  • Page 22: Nexus Lite Configuration

    2695 Series Operation Manual EZT-2695-8000/1 Nexus Lite Configuration The Nexus configuration is divided into three areas: • Workspace This is where visual elements of the setup are defined. This includes the visibility and position of windows, visual preferences such as text colour and other visual options. •...

  • Page 23: Preferences

    2695 Series Operation Manual EZT-2695-8000/1 Display Mode The Plot data can be controlled from this tab, the mode either Grid or Polar can be selected. This is also controlled from shortcuts on the tool bar. Preferences The Preferences tab allows the operator to set the Nexus configuration files that will be automatically loaded on startup of the system.

  • Page 24: Vessel

    2695 Series Operation Manual EZT-2695-8000/1 Vessel The Vessel tab allows the operator configure the plot display for the vessel. Vessel Size & Drawing Options Drawing options allow the vessel to be scaled, to display a label showing the heading and position and to set the transparency of the vessel on the plot window.

  • Page 25: System Configuration

    2695 Series Operation Manual EZT-2695-8000/1 System Configuration Toolbar Button: The six tabs contained within the ‘System Configuration’ area are described below. Note that the title bar of this window shows the name of currently system configuration file in brackets. All system configuration settings can be saved to file for quick setup. The system can load any saved configuration on startup (configured in Workspace ->...

  • Page 26: Data Out

    2695 Series Operation Manual EZT-2695-8000/1 Serial port settings changed on this tab will only be applied to the system upon clicking ‘Apply’ or ‘OK’. A validity check will be performed before applying the settings and a warning will be displayed if the check shows a potentially invalid setup (i.e. more than one port configured for Gyro input).
  • Page 27 2695 Series Operation Manual EZT-2695-8000/1 Data Out Setup Baud rate, data bits, parity and stop bits may be configured output is from a PC port. For the Nexus Lite output port, only the selected port and the baud rate may be adjusted. Please note that there is no hardware or software handshaking in either direction.
  • Page 28 2695 Series Operation Manual EZT-2695-8000/1 Output String The output string mode can be selected from a number of pre-defined output formats. The primary and secondary output strings may be configured independently by selecting the required output string destination radio button. Any number of output formats may be selected. If more than one selection is made then each string will be appended, each individual string will be terminated with a carriage return and line feed.

  • Page 29: Transceiver

    2695 Series Operation Manual EZT-2695-8000/1 Transceiver The position calculated by Easytrak Nexus Lite is referenced to the transducer, by entering the installation offsets the position can be referenced to another part of the vessel, for example, the navigation antenna or CRP. The following offsets are available: Forward/Aft (m), Port/Starboard (m), Z (Height m).
  • Page 30 2695 Series Operation Manual EZT-2695-8000/1 Enter the parameters. The result is automatically placed in the VOS text box. Compass Smoothing Compass smoothing will reduce jitter and can be set between MIN and MAX depending upon the operating circumstances. Should the transducer be deployed in a static or near static situation, MAX damping can be used;...

  • Page 31: Notes On Transducer Depth And Z Offsets

    2695 Series Operation Manual EZT-2695-8000/1 Notes on Transducer Depth and Z Offsets ‘Z’ and Transducer offsets Navigation Point Z Offset 4m Transducer depth (True ‘Z’ Distance) Transducer (Raw Acoustic depth) 5m (Depth below Sea Level) Beacon Note, N.T.S. The Navigation Point is the point on the vessel where all navigation measurements are referenced to;...

  • Page 32: Utm Grid Setup

    2695 Series Operation Manual EZT-2695-8000/1 UTM Grid Setup UTM Grid Setup allows the operator to enter UTM set-up parameters: UTM Parameters The following values may be manually entered • False Easting • False Northing • Central Meridian Scale Factor • Grid Origin –...

  • Page 33: Cycle Control

    2695 Series Operation Manual EZT-2695-8000/1 To calculate the UTM zone start the Survey Calculator. Enter the degrees and decimal degrees of your local latitude and longitude. If GPS is available the position is automatically set to the current GPS position. Click OK to apply and exit. The calculator, upon exit, sets the parameters in the UTM Grid Setup.

  • Page 34: Internal Triggering Modes

    2695 Series Operation Manual EZT-2695-8000/1 Internal Triggering Modes Other factors such as interrogation pulse length and internal system delays all effect the system cycle times possible. These are all taken into account in determining if the cycle time required can be achieved.

  • Page 35: Speed Of Sound Profile

    2695 Series Operation Manual EZT-2695-8000/1 Speed of Sound Profile The Speed of Sound Profile tab enables data gathered from any profiling hardware to be imported into Nexus. Once a Sound Velocity Profile has been loaded and enabled, the system will automatically calculate the optimum velocity of sound value for each beacon, based on the current depth of the beacon.
  • Page 36 2695 Series Operation Manual EZT-2695-8000/1 Load Profile using Import Wizard To start the wizard press the ‘Import Template Wizard’ button. After selecting the data file to import the following screen will be displayed Step 1 of 5 In the data preview window, select the line that contains the first line of sound velocity data. Once selected, press ‘Next’...
  • Page 37 2695 Series Operation Manual EZT-2695-8000/1 Step 3 of 5 In the data preview window, select the column that contains the depth value by clicking on the relevant column header. The depth units will default to meters, if the data is in decibars then ensure the Depth Units is set accordingly.
  • Page 38 2695 Series Operation Manual EZT-2695-8000/1 Step 5 of 5 Please confirm that the correct columns have been selected. If required, the results of the import wizard may be saved into an SVP template to enable any future imports of data files in the same format to be quickly processed. To save as a template and complete the import press ‘Save &...

  • Page 39: Maps

    2695 Series Operation Manual EZT-2695-8000/1 Maps Easytrak Nexus Lite can overlay user supplied georeferenced images on the plot window Preview Area Multiple overlay files may be added. Each file can be moved up or down the overlay order and can be set to the required tranparency to enable optimal viewing.

  • Page 40: Beacon Editor

    2695 Series Operation Manual EZT-2695-8000/1 Beacon Editor Toolbar Button: Shortcut Key: Ctlr+B The tabs contained within the ‘Beacon Editor’ window are described below. Note that the title bar of this window shows the name of currently loaded beacon setup file in brackets. Beacon Editor Context Menu Pressing the right mouse button when over the beacon editor window will show the ‘Context Menu’...
  • Page 41 2695 Series Operation Manual EZT-2695-8000/1 Tracking On To Enable Tracking on the selected Beacon ‘Tick’ the ‘Tracking On’ check box. Description A Description can be added, for example Beacon S/N or Diver 1. This is an aid for display, event log messages and place mark reference and will have no effect on the data or output.
  • Page 42 2695 Series Operation Manual EZT-2695-8000/1 configured within the System Configuration) and the type of compass should be defined to ensure the Kalman filter uses an appropriate Standard Error figure for the heading. Beacon Type Transponder - Beacons that receive an acoustic interrogate signal and then reply after a set time (turn around delay) on a different frequency.

  • Page 43: Receiver

    2695 Series Operation Manual EZT-2695-8000/1 V-Nav ID Enter the ID of the V-Nav beacon here. Valid values are 0 - 7199 Receiver Each of the beacons receiver settings can be configured for optimal tracking. Receive Filtering Receiver sensitivity and bandwidth can be adjusted to obtain optimal signal to noise levels. See Data Tab for received signal information.

  • Page 44: Visuals

    2695 Series Operation Manual EZT-2695-8000/1 Visuals The display properties for each beacon can be set be the user. Options Within the plot window, each beacon can have a label displayed (showing description, horizontal range and bearing). This may be switched on/off using the ‘Label On’ check box. The Icon graphic representing the target type can be sitched on or off using the ‘Icon On’...

  • Page 45: Data

    2695 Series Operation Manual EZT-2695-8000/1 Data The ‘Data’ tab displays position and signal quality data. There are 5 data sets continuously calculated by the system from the raw acoustic measurements. Corrected, North, Gated Smoothed and Kalman Filtered. The values of these are displayed in the top section.

  • Page 46: Filtering & Gating

    2695 Series Operation Manual EZT-2695-8000/1 Filtering & Gating All gating and filtering parameters may be setup in this tab. Each beacon can be controlled individually to allow the optimum setup that is appropriate for the type of target being tracked. Gating Description Gating can be used to remove spurious positions made with Easytrak Nexus due to signal reflections, excessive environmental noise etc.

  • Page 47: Gating Search Mode

    2695 Series Operation Manual EZT-2695-8000/1 Gating Search Mode When any gating mode is enabled, if any beacon is out of gate for the number of positions, defined in the smoothing parameter, a search mode is activated. In this mode the last known good position of the beacon will be outputted and the gate values will be set to maximum.

  • Page 48: Kalman Filter Presets

    2695 Series Operation Manual EZT-2695-8000/1 Compass Correct Compass compensation is where the target has an internal compass that can be interfaced to Nexus. This will aid the Kalman filter in changes of target orientation. A typical target would be a Remotely Operated Vehicle (ROV) which commonly has an internal compass to help the pilot with orientation and navigation.

  • Page 49: Beacon

    2695 Series Operation Manual EZT-2695-8000/1 Beacon The beacon tab is used to display the details of a 1000 series beacon that may be connected to a Nexus serial port. The connected beacon can also be configured to match the current channel number and depth telemetry mode of the current beacon setup.

  • Page 50: Release

    2695 Series Operation Manual EZT-2695-8000/1 Release The release tab enables control of Applied Acoustics 5xx or 15xx release beacons. Release functionality is an add on feature that must be enabled. General Operation The release tab, will not be visible until the ‘Target Type’ is selected as a release type in the ‘General’...

  • Page 51: 15Xx Release Operation

    2695 Series Operation Manual EZT-2695-8000/1 • Enable/Disable Sleep – A release beacon may be put into a sleep mode. In this mode the beacon will only respond to release commands and not to normal acoustic interrogations 15xx Release Operation The 15xx release beacons may be operated from this tab. Each beacon has an ID, in order to communicate with the release beacon, the correct ‘Release ID’...

  • Page 52: Beacon Data

    2695 Series Operation Manual EZT-2695-8000/1 • Set ID – A new release beacon ID may be programmed into the beacon by entering a new ID value into the text box and pressing the ‘Set ID’ button. Important: Please ensure that after a new ID has been programmed successfully, the ‘Release ID’...

  • Page 53: Plot Window

    2695 Series Operation Manual EZT-2695-8000/1 Plot Window Toolbar Button Shortcut Key: Ctrl+D This is the main plotting window where the vessel and the target positions are plotted. Waypoints and place-marks can also be viewed on the window. Vessel Heading North Reference Beacon Trailpoints Waypoint...
  • Page 54 2695 Series Operation Manual EZT-2695-8000/1 The Display Mode can either be Grid or Polar (as above). This can be controlled from the context menu, system preferences or shortcuts on the tool bar. If maps have been loaded then the overlay may be switched on or off via the ‘Map Overlay’ toolbar button The Context Menu is accessed by a Right Mouse Click when the Plot Window is active.
  • Page 55 2695 Series Operation Manual EZT-2695-8000/1 • Display Mode The display mode can be set to grid or polar. • Vessel The label and vessel scaling can be toggled on // off. This along with other vessel settings may also be adjusted from Edit Workspace – Vessel. •...

  • Page 56: Vessel Monitor

    2695 Series Operation Manual EZT-2695-8000/1 Vessel Monitor Toolbar Button Shortcut Key: Ctrl+V The Vessel Monitor will display the all vessel’s parameters including Heading, Pitch, Roll, GPS Position, Speed Over Ground (SOG) and Course Over Ground (COG) and the age of the GPS position relative to the last received beacon response.

  • Page 57: Pitch & Roll Monitor

    2695 Series Operation Manual EZT-2695-8000/1 Pitch & Roll Monitor Toolbar Button Shortcut Key: Ctrl+A The Pitch & Roll Monitor window show a graphical representation of the current vessel heading, pitch & roll. The forward, aft, port and starboard of the vessel are indicated on the model with F,A,P & S respectively.

  • Page 58: Event Log

    2695 Series Operation Manual EZT-2695-8000/1 Event Log Toolbar Button Shortcut Key: Ctrl+V The event log displays any required system messages. The Event Log records and reports all system events in three levels: Information: Information Only Messages Warning: System Warning Messages Critical: Critical System Messages The Event Log can be filtered to display only the desired level messages.

  • Page 59: Measurement

    2695 Series Operation Manual EZT-2695-8000/1 Measurement Toolbar Button The Measurement Tool can be used to measure between any two points on the plot screen, a range and bearing will be displayed in the measurement window. A measurement may be ‘attached’ at one or both ends to an object such as the vessel, a beacon, a waypoint or a placemark.

  • Page 60: Placemarks

    2695 Series Operation Manual EZT-2695-8000/1 Placemarks Toolbar Button Shortcut Key: Ctrl+M Place marks are designed to offer the operator the ability to mark and record places of interest or events typically in Eastings and Northings (for reference) with the depth of the reading appended. The above example is shown with the context menu displayed (right mouse click).

  • Page 61: Waypoints

    2695 Series Operation Manual EZT-2695-8000/1 Waypoints Toolbar Button Shortcut Key: Ctrl+W Waypoints are designed to be used as references or markers for navigation purposes. The above example is shown with the context menu displayed (right mouse click). Waypoints can be added by positioning the cursor over the place to be marked on the plot window and right clicking selecting add waypoint.

  • Page 62: Recorder/Playback

    2695 Series Operation Manual EZT-2695-8000/1 Recorder/Playback Toolbar Button Shortcut Key: Ctrl+R The record and playback function allows the operator to record the tracking and all peripheral interfaces in real time. To have the facility to play back the logged data for review. As the data is recorded in raw format the data sets can be re-created with new offsets, smoothing levels, etc to produce a different final data set.

  • Page 63: Tools Menu

    2695 Series Operation Manual EZT-2695-8000/1 Tools Menu A number of tools/utilities are available via the tools menu such as system programming, calibration etc. Programming From the programming menu the software in both the console and the transceiver may be updated with data files supplied from Applied Acoustics.

  • Page 64: Advanced User Mode

    2695 Series Operation Manual EZT-2695-8000/1 Advanced User Mode Advanced user mode may be enabled from the Tools menu. A password may also be entered to restrict access to this mode if required. Acoustic Monitor An acoustic monitor mode is available when in advanced user mode. The acoustic monitor mode enables the transceiver to listen for ambient noise that may be affecting system performance and ascertain frequencies that may be interfering with the USBL acoustics.
  • Page 65 2695 Series Operation Manual EZT-2695-8000/1 The zoom factor of the Captured Data window may be adjusted via the mouse wheel. To increase the step size when using the wheel mouse the ‘Ctrl’ key and/or the ‘Alt’ key as follows Mouse wheel Normal step size Mouse wheel + Ctrl Medium step size...

  • Page 66: Help Menu

    2695 Series Operation Manual EZT-2695-8000/1 Help Menu About The about box displays system information about the console and the transceiver including software/firmware revisions and serial numbers. User Information The user information window allows the user to input contact details which will be sent to Applied Acoustics when sending a technical support request.

  • Page 67: Request Support

    2695 Series Operation Manual EZT-2695-8000/1 Request Support If you require any technical support you may request this via the help menu. Please enter a brief description of the problem or request in the area provided. It is also possible to attach a previously recorded file that may help customer support.

  • Page 68: Calibration

    2695 Series Operation Manual EZT-2695-8000/1 6. Calibration Upon pole mount installation on a vessel a USBL system should be perfectly aligned with the vessel’s bow and with no angular offsets in the pitch and roll axis if external sensors are utilized. The internal sensors are factory aligned and calibrated.

  • Page 69: Static Calibration

    2695 Series Operation Manual EZT-2695-8000/1 6.1 Static Calibration A static calibration can only calculate the transducer alignment error and not any pitch or roll offsets. Therefore it is recommended that the internal pitch and roll sensor is used and the internal compass is disabled –...

  • Page 70: Easycal 2 Usbl Calibration

    2695 Series Operation Manual EZT-2695-8000/1 6.2 EasyCal 2 USBL Calibration The program is an add-in to the Easytrak Nexus 2 acoustic positioning system and provides the facility to calibrate the acoustic system to eliminate any alignment errors which may have occurred during the vessel installation of the transceiver.

  • Page 71: Easycal 2 Procedure

    2695 Series Operation Manual EZT-2695-8000/1 EasyCal 2 Procedure The following procedure can be used to measure dynamically any offsets between the Easytrak Nexus Transceiver Head and the external sensors interfaced. This is to enable accurate operation of the Easytrak Nexus tracking system when pole mounted onto a vessel with external VRU and gyro.

  • Page 72: Acquisition Mode

    2695 Series Operation Manual EZT-2695-8000/1 Acquisition Mode Upon launch Acquisition Mode is enabled by default. To toggle between acquisition mode and processing mode click this button to select. When in acquisition mode the GPS Monitor button is displayed, when active the below pop up window is enabled.
  • Page 73 2695 Series Operation Manual EZT-2695-8000/1 When in acquisition mode the Nexus Monitor button is displayed, when active the below pop up window is enabled. This can be placed on the display for QC monitoring A data summary is displayed in the menu bar Vessel Position is displayed Beacon (TP) number, range and status displayed Activity indicator of connection to Nexus 2...
  • Page 74 2695 Series Operation Manual EZT-2695-8000/1 Clicking on the Configuration button launches the system configuration window. The acquisition settings for the calibration can be defined as appropriate for the vessel / application. Vessel Size: The vessel graphic on the plot window can be scaled to be representative of the vessel.
  • Page 75 2695 Series Operation Manual EZT-2695-8000/1 Calibration templates: 1. Cardinal Points – this is the preferred method as it exercises all facets of the NEXUS transducer and provides a balanced solution, it also provides better separation of the X and Y elements of the data allowing a more precise Pitch and Roll calculation to be made. This method does rely on station keeping by the vessel which can be achieved with DP vessels but may not be practicable for smaller vessels or those without DP (Dynamic Positioning).

  • Page 76: Logging Data

    2695 Series Operation Manual EZT-2695-8000/1 Logging Data The Logging ON / OFF button is provided to turn the data logging ON/OFF to begin calibration logging. As data is logged a histogram is updated as an indicator of a minimum number of fixes required for processing.

  • Page 77: Processing Mode

    2695 Series Operation Manual EZT-2695-8000/1 Processing Mode Import a Logged File Project Titles Merge Additional File List Database Load a Processed File Processing Statistics Save File Save Processed File As Close Program Files: Import a Logged File This menu item imports an initial logged dataset, all current data is deleted, after the initial import you can merge in other datasets to create a complete data set for processing.

  • Page 78: Merge Additional File

    2695 Series Operation Manual EZT-2695-8000/1 Merge Additional File Merge works in the same way as Import but rather than replace the data in memory it adds to the data already imported. This comand is used to compile files recorded seperately together, for example when acquiring data at the 4 cardinal points and fixing is turned off during the transit between locations.

  • Page 79: List Database

    2695 Series Operation Manual EZT-2695-8000/1 List Database Selecting this item provides a listing of the dataset. The height and width of the displayed form can be dragged to suit your screen requirements, once resized the settings will be saved so that when the form is opened next the size and position will be the same (this can still be changed to suit).

  • Page 80: Processing Statistics

    2695 Series Operation Manual EZT-2695-8000/1 Processing Statistics This form provides statistical information on the acquired data the two types of graph Histogram and Time Series are displayed below. Select the data type you wish to view from th epulldown list at the top left then select either "Histograms"...

  • Page 81: Processing

    2695 Series Operation Manual EZT-2695-8000/1 Processing This provides the main body of the program and incorporates all the relevant details for a particular calibration. A typical screen is shown here following the import and merging of the log files from 4 cardinal points: As logged data files are imported / merged to the current processing...
  • Page 82 2695 Series Operation Manual EZT-2695-8000/1 Configuration. The initial offset values are those read from Nexus or as logged in a processed file. These can be updated during processing if in error. As each dataset is loaded it is displayed at the bottom left of the form and a checkbox next to each datasets allows the user to easily enable/disable a complete dataset.
  • Page 83 2695 Series Operation Manual EZT-2695-8000/1 When in manual mode (auto unticked) items that are checked, the residual will show the additional correction to apply to that shown in the data window. By selecting these one at a time as each item will affect the computation results and thereby change the residual slightly.

  • Page 84: Reporting

    2695 Series Operation Manual EZT-2695-8000/1 Reporting: Upon processing a logged file or opening a processed file, the plot to file and plot to printer buttons are active – To generate a Calibration report click on Plot to Printer, the folllowing window is displayed 1) Summary report on a single page which summarises the input data, the computation and errors and provides two plots, one of the main chart view and the other showing a histogram of the residuals.
  • Page 85 2695 Series Operation Manual EZT-2695-8000/1 Summary Report: Page 85 of 124...
  • Page 86 2695 Series Operation Manual EZT-2695-8000/1 Complete Listing of Dataset: Page 86 of 124...

  • Page 87: Operation

    2695 Series Operation Manual EZT-2695-8000/1 Operation: A Wizard is provided for new users, enabled from the “Configuration” form. Page 87 of 124...
  • Page 88 2695 Series Operation Manual EZT-2695-8000/1 Page 88 of 124...
  • Page 89 2695 Series Operation Manual EZT-2695-8000/1 Page 89 of 124...

  • Page 90: Troubleshooting

    2695 Series Operation Manual EZT-2695-8000/1 7. Troubleshooting No Power light on the front panel of Easytrak Nexus AULT YMPTOM The Power supply. Is there power to the socket? The Power supply OSSIBLE AUSES is not plugged into Alpha, or the Wall socket, or not switched on. No Signal return at any range AULT YMPTOM...
  • Page 91 2695 Series Operation Manual EZT-2695-8000/1 parts of the vessel, seabed objects – man-made and natural. Bubbles of air and gas produced by the vessel’s propeller. Thermoclines. This is due to abrupt changes of velocity of sound in water due to variances of water temperature and / or salinity. The effect of this can be to ‘tunnel’...
  • Page 92 2695 Series Operation Manual EZT-2695-8000/1 Unstable positions - bearing instability and range unstable AULT YMPTOM Transducer depth. Transducer may not be deep enough in the OSSIBLE AUSES water. It is recommended the transducer be below the draft of the vessel by at least 1 metre. Interrogation rate too fast.

  • Page 93: External I/O Connector Pin Outs

    2695 Series Operation Manual EZT-2695-8000/1 8. External I/O Connector Pin Outs • S ERIAL ONNECTORS Receive Data (Rx) Transmit Data (Tx) • BNC C ONNECTOR Inner Signal + Outer Signal – Note the BNC connector is isolated. Page 93 of 124...

  • Page 94: Easytrak Nexus Channels

    2695 Series Operation Manual EZT-2695-8000/1 9. Easytrak Nexus Channels AAE Spread Spectrum Channels Transponder Responder Channel Description TAT (ms) TAT (ms) AAE Spread Spectrum SS CH 0 AAE Spread Spectrum SS CH 1 AAE Spread Spectrum SS CH 2 AAE Spread Spectrum SS CH 3 AAE Spread Spectrum SS CH 4...

  • Page 95: Aae Easytrak Channels

    2695 Series Operation Manual EZT-2695-8000/1 AAE Easytrak Channels Pulse RXF1 RXF2 TXF1 TXF2 Transponder Responder Channel Width (Hz) (Hz) (Hz) (Hz)* TAT (ms) TAT (ms) (ms) 17500 30000 29000 18500 28000 27000 19500 26000 25000 20500 29000 28000 21500 27000 26000 22500 30000...

  • Page 96: Simrad Hipap Channels

    2695 Series Operation Manual EZT-2695-8000/1 Simrad HiPAP Channels Pulse RXF1 RXF2 TXF1 TXF2 Transponder Responder Channel Width (Hz) (Hz) (Hz) (Hz)* TAT (ms) TAT (ms) (ms) 21000 21500 29250 29750 21000 22000 29750 30250 21000 22500 30250 28750 21000 23000 30750 27250 21000...

  • Page 97: Simrad Hipap Channels Continued

    2695 Series Operation Manual EZT-2695-8000/1 Simrad HiPAP Channels Continued Pulse RXF1 RXF2 TXF1 TXF2 Transponder Responder Channel Width (Hz) (Hz) (Hz) (Hz)* TAT (ms) TAT (ms) (ms) 24000 21000 28750 29250 24000 21500 29250 29750 24000 22000 29750 30250 24000 22500 30250 28750...

  • Page 98: Ore Trackpoint Channels

    2695 Series Operation Manual EZT-2695-8000/1 ORE Trackpoint Channels Pulse RXF1 TXF1 TXF2 Transponder Responder Channel Width Channel (Hz) (Hz) (Hz)* TAT (ms) TAT (ms) (ms) 18000 24000 23000 17000 24000 23000 LXT Code 1 17000 23000 22000 18000 25000 24000 16000 25000 24000...

  • Page 99: Easytrak Nexus Data Output Formats

    2695 Series Operation Manual EZT-2695-8000/1 10. Easytrak Nexus Data Output formats (AAE) D PPLIED COUSTIC NGINEERING ATA STRING The AAE string has 76 characters including carriage return and line feed when not in GPS mode. i,t,hhmmss,xxxxx.x,yyyyy.y,zzzzz.z,rrrr.r,bbb.b,dd.d,ccc.c,RRR.R,ppp.p,SSSCL Description String code Beacon identification (1 to 4) Data type: Ship ref (0), North ref (1), Smoothed (3) Hour Minute...

  • Page 100: Applied Acoustic Engineering V2(Aae) Data String

    2695 Series Operation Manual EZT-2695-8000/1 V2(AAE) D PPLIED COUSTIC NGINEERING ATA STRING aaaaaa,i,t,o,g,hhmmss.s,xxxxx.x,yyyyy.y,zzzzz.z,rrrr.r,bbb.b,dd.d,ccc.c,RRR.R,ppp.p,SSS*eeCL Description String code Message Identifier: $AADS1 Beacon identification (1 to 10) Data type: Ship ref(0), North ref(1), Gated(2),Smoothed(3),Kalman(5) Orientation: Heads Up(H), North Referenced(N) GPS Position: GPS On(Y), GPS Off(N) Hour Minute Second (output to 1 decimal place)

  • Page 101: Ore Trackpoint 2Ec Data String

    2695 Series Operation Manual EZT-2695-8000/1 ORE Trackpoint 2EC Data string The simplified TP-2EC string has 68 characters including carriage return and line feed. i*hh:mm:ss*ccc*bbb.b*rrrrr.r*xxxxxx.x*yyyyyy.y*zzzzz.z*-ttttt.t*EECL Description String code Beacon identification Hour Minute Second Compass Bearing Slant range X (or Eastings) Y (or Northings) Telemetry t (always 0.0) Error...

  • Page 102: Simrad Hpr 300P Data String

    2695 Series Operation Manual EZT-2695-8000/1 Simrad HPR 300P Data String The simplified HPR 300P string has 48 characters including carriage return and line feed. ii*H**B**SSS**ccc.c*xxxx.x*yyyy.y*zzzz.z**QQ.QCL Description String code (above) Beacon identification i (Beacon number rather than channel number) Transducer number H (Always 1) Beam B (Always ‘W’)

  • Page 103: Ore Trackpoint Std-Ec W/Pr Data String

    2695 Series Operation Manual EZT-2695-8000/1 ORE Trackpoint STD-EC W/PR Data string The simplified STD-EC W/PR string has 80 characters including carriage return and line feed. i*hh:mm:ss*ccc*bbb.b*rrrrr.r*xxxxxx.x*yyyyyy.y*zzzzz.z*-ttttt.t*EE*RRR.R*PPP.PCL Description String code Beacon identification Hour Minute Second Compass Bearing Slant range X (or Eastings) Y (or Northings) Telemetry t (always 0.0)

  • Page 104: Simrad Hpr 309 Data Telegram

    2695 Series Operation Manual EZT-2695-8000/1 Simrad HPR 309 Data Telegram The simplified HPR 309 telegram has 32 bytes including the ‘@’ terminator. Field Name Size Byte Comment (bytes) Offset Header Currently set to 1 Roll Used Pitch Used Heading Used Transponder index Beacon No.
  • Page 105 2695 Series Operation Manual EZT-2695-8000/1 Comments on the Simrad HPR309 Telegram Header Currently set to 1 Roll Roll is a 12 bit, 2’s complement scaled integer. Positive direction is when port side is up. Resolution is 360.0/4096 degrees. Minimum value = 800H (-2048) = -180.0°. 0 = 0°, and 7ffH = 2047 = (180° - resolution) °.
  • Page 106 2695 Series Operation Manual EZT-2695-8000/1 Comments on the Simrad HPR309 Telegram cont’d Test Not used, bit 0 = 0. Transponder Not used, bit 0 = 0. type Transponder Mobile transponder, bit 0 = 1. specification Transducers Not used, bit 0 = 0. Transducer Not used, bit 0 = 0.

  • Page 107: Simrad $Psimssb Data String

    2695 Series Operation Manual EZT-2695-8000/1 Simrad $PSIMSSB Data String The simplified Simrad $PSIMSSB string is of variable length and is terminated by a carriage return and line feed. Field Name Comment $PSIMSSB Start character and address ,hhmmss.ss Time Real time of measurement Beacon code E.g.

  • Page 108: Simrad $Psimsns Data String

    2695 Series Operation Manual EZT-2695-8000/1 Simrad $PSIMSNS Data string The simplified Simrad $PSIMSNS string is of variable length and is terminated by a carriage return and line feed. Field Name Comment $PSIMSNS Start character and address ,hhmmss.ss Time Real time of measurement Beacon code E.g.

  • Page 109: Pseudo $Gprmc Data String

    2695 Series Operation Manual EZT-2695-8000/1 Pseudo $GPRMC Data string RMC - Recommended Minimum Navigation Information. The pseudo $GPRMC string is terminated by a carriage return and line feed. $GPRMC,hhmmss.sss,A,llll.llll,N,yyyyy.yy,E,k.k,c.c,DDMMYY,v.v,V*HHCL Description String code Header $GPRMC Hour Minute Second Status A = OK, V = Warning Latitude ddmm.mmmm North or South (N/S) Longitude dddmm.mmmm...

  • Page 110: Klein 3000 Sss Data Strings

    2695 Series Operation Manual EZT-2695-8000/1 KLEIN 3000 SSS Data strings An output is provided for various Side Scan Sonars. This selection outputs three strings one immediately after the other - $GPGGA, $GPVTG, and $GPTLL. The strings $GPGGA and $GPVTG provide the position and course over ground of the vessel, and string $GPTLL provides the position of the towfish.

  • Page 111: Klein 3000 Data Strings / Continued

    2695 Series Operation Manual EZT-2695-8000/1 Klein 3000 Data strings / Continued Vessel track made good and ground speed $GPVTG,ttt.t,T,mmm.m,M,nnn.n,N,kkk.k,K*HHCL Description String code Header $GPVTG True track made good (Degrees) True Magnetic track made good (Degrees) Magnetic Ground speed (Knots) Knots Ground speed (Km/h) Km/h Check Sum...

  • Page 112: Pseudo $Gpgga Data String

    2695 Series Operation Manual EZT-2695-8000/1 Pseudo $GPGGA Data string The output string contains original data as received from GPS input message apart from the fields highlighted in blue below. 1. Latitide and Longitude contain target position (not vessel position) 2. GPS Quality Indicator field contains acoustic quality where 1 = good response, 0 = no response 3.

  • Page 113: System Specification

    2695 Series Operation Manual EZT-2695-8000/1 11. System Specification Easytrak Nexus Console Model 2695 Dimensions 1U, 254 x 54 x 260mm Weight 1.0kg Power requirements 48VDC / VAC Adapter Input: 90Vac – 230Vac 47-63Hz typically 3A Connection to transceiver Rear panel connector for 2683 Transceiver Temperature Operating: -10°...

  • Page 114: Easytrak Nexus Transceiver Model 2683

    2695 Series Operation Manual EZT-2695-8000/1 Easytrak Nexus Transceiver Model 2683 Material 316 Stainless Steel Weight in air/water 11kg/8.5kg Dimensions 100mm x 500mm (Ø x L) Temperature Operating: -10° to +40°C Storage: -20° to +50°C Depth rating Electrical supply 48Vdc Temperature sensor 1°...

  • Page 115: Environment

    2695 Series Operation Manual EZT-2695-8000/1 20 kg (Allows Transceiver to be deployed from cable) System Externally assessed for immunity and emissions; conforms to 89/336/EEC. RoHS compliant Environment Operating Temperature -5 to 30°C Storage Temperature -5 to 45°C Note: Specification is subject to change without notice Page 115 of 124...

  • Page 116: Handling

    2695 Series Operation Manual EZT-2695-8000/1 Handling There are no special handling conditions with this product. For beacons, please see their specific manuals. End of Life Recycling / Disposal Within the EU all electronic components and batteries must be taken for separate collection at the end of their working life under EU WEEE directives.

  • Page 117: System Recovery

    2695 Series Operation Manual EZT-2695-8000/1 12. System Recovery The Nexus Console has a built in system recovery tool. This may be used to recover the system to the condition when delivered. Please contact Applied Acoustics Technical Support for details Page 117 of 124...

  • Page 118: Appendix A - Transducer Mounting Bracket A

    Appendix A – Transducer Mounting Bracket A Transceiver installation is the responsibility of the operator. ________________________________________________________________________________________________________________________________________________________________________ Page 118 of 124...

  • Page 119: Appendix B - Transducer Mounting Bracket B

    Appendix B – Transducer Mounting Bracket B Bracket rated for typical survey speeds of up to ~5 Knots. Bracket A is recommended for higher speed applications. Transceiver installation is the responsibility of the operator. ________________________________________________________________________________________________________________________________________________________________________ Page 119 of 124...

  • Page 120: Appendix C - Transducer Mounting Dimensions

    Appendix C – Transducer Mounting Dimensions ________________________________________________________________________________________________________________________________________________________________________ Page 120 of 124...

  • Page 121: Appendix D - Deck Cable Wiring

    Appendix D – Deck Cable Wiring CONN A CONN B APPLIED ACOUSTIC ENGINEERING LTD CONNECTOR FACE VIEW CONNECTOR FACE VIEW Cable Conn A Function Conn B Screened Twisted Pairs (x) 1033;1033;(A) POWER SUPPLY 1033;1033;GREEN (1) (A) POWER SUPPLY + BLACK (1) Cut down and Insulate SCREEN (N/C) 1033;1033;SCREEN (1)

  • Page 122: Appendix E - Remote Serial Application

    Appendix E – Remote Serial Application The Nexus system may be connected to a network via the LAN port on the rear panel. When connected, the system broadcasts a UDP message on port 17003 containing the currently selected output message, as selected in the system configuration.

  • Page 123: Index

    INDEX AAE - Data Out, 99 About, 66 EasyCal USBL Calibration, 68, 69, 70 Acoustic Depth, 41 Event Log, 58 Advanced User Mode, 48, 64 External Depth, 41 External Triggering, 33 Beacon - Depth Options, 41 Beacon - Description, 41 F5 - Add Place Mark, 60 Beacon - Target Type, 41, 43 False Easting, 32...
  • Page 124 Manual Depth, 41 Serial set-up options, 25 Maps, 39 Signal Quality - Beacon, 45 Max Range, 42 Simrad $PSIMSNS – Data Out, 108 Measurement, 59 Simrad $PSIMSSB – Data Out, 104, 107 Medwin’s, 29, 42 Simrad HPR 300P - Data Out, 102 Software Installation, 11 Sonar SSS, 110 Speed of Sound Profile, 35...

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