Kongsberg EK80 Instruction Manual
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Kongsberg EK80 Instruction Manual

Wideband scientific echo sounder
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INSTRUCTION
MANUAL
ADCP Calibration EK80
kongsberg.com/ek80

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Summary of Contents for Kongsberg EK80

  • Page 1 INSTRUCTION MANUAL ADCP Calibration EK80 kongsberg.com/ek80...
  • Page 2 This publication provides you with the basic information required to calibrate the EK80 system fitted with relevant hardware for ADCP measurements. For more information about the practical use of the EK80 system, as well as detailed information about the functions and dialog boxes provided, refer to the Reference Manual and/or the context sensitive On-line help.
  • Page 3 The information contained in this document remains the sole property of Kongsberg Maritime AS. No part of this document may be copied or reproduced in any form or by any means, and the information contained within it is not to be communicated to a third party, without the prior written consent of Kongsberg Maritime AS. Warning The equipment to which this manual applies must only be used for the purpose for which it was designed.

  • Page 4: Table Of Contents

    User manual for ADCP calibration Table of contents ABOUT THIS MANUAL ..............5 INTRODUCTION................7 About acoustic Doppler current profiler (ADCP) calibration..........7 Vessel coordinate system and rotation angles................. 8 ADCP calibration summary....................9 Support information ......................10 CALIBRATING THE ADCP SYSTEM ..........11 Preparing circle calibration ....................11 Circle calibration for ADCP in real time ................
  • Page 5 EK80 110-0037585/A...

  • Page 6: About This Manual

    About this manual About this manual This publication provides you with the basic information required to calibrate the EK80 system fitted with relevant hardware for ADCP measurements. Relevant products This publication provides you with the basic information required to calibrate the EK80 system for current indicator measurements.
  • Page 7 ® Simrad , SIMRAD and the Simrad logo are either registered trademarks, or trademarks of Kongsberg Maritime AS in Norway and other countries. ® Windows is a registered trademark of Microsoft Corporation in the United States and other countries. We want your feedback We always want to improve our products.

  • Page 8: Introduction

    Introduction Introduction Topics About acoustic Doppler current profiler (ADCP) calibration, page 7 Vessel coordinate system and rotation angles, page 8 ADCP calibration summary, page 9 Support information, page 10 About acoustic Doppler current profiler (ADCP) calibration The purpose of an ADCP calibration is to determine the exact installation parameters for the ADCP transducer with as high precision as possible, as well as the so called Scaling for the ADCP data.

  • Page 9: Vessel Coordinate System And Rotation Angles

    EK80 User manual for ADCP calibration • x-position is given in the alongship direction • y-position is given in the athwarthship direction • z-position is given in the vertical direction The deviation angle and position are estimated during the calibration by comparing the GPS and MRU output with the uncompensated bottom track from the ADCP.

  • Page 10: Adcp Calibration Summary

    All the physical locations of the sensors are referenced to the reference point. ADCP calibration summary The EK80 system may be calibrated in real time or using replay files. The calibration process involves several steps and preparations. Prerequisites The following conditions must be considered: •...

  • Page 11: Support Information

    Transducer Installation Support information If you need technical support for your EK80, you must contact your local dealer, or one of our support offices. A list of all our offices and dealers is available on our website. You can also contact our main support office in Norway.

  • Page 12: Calibrating The Adcp System

    Calibrating the ADCP system Calibrating the ADCP system Topics Preparing circle calibration, page 11 Circle calibration for ADCP in real time, page 14 Circle calibration for ADCP in replay, page 18 Reprocessing calibration results for ADCP, page 20 Preparing circle calibration Circle calibration calibrates yaw angle and pitch angle as well as position on the x-axis (alongship) and y-axis (athwartship).
  • Page 13 • Set up file and folder settings for the raw data created. Any adjustments to the EK80 system files are done automatically. Note Calibration must be taken seriously. To achieve the best results, the calibration must be planned and done carefully.
  • Page 14 Calculate the average salinity and temperature values, and type these into the dialog box. Environment The EC150 has a temperature sensor which may be used as a temperature source. dialog box is opened from the menu. The sound velocity is Environment Setup automatically calculated by the EK80 system. 110-0037585/A...

  • Page 15: Circle Calibration For Adcp In Real Time

    Calibration Wizard calibration is recorded and processed as part of the Calibration Wizard progress. Note All other acoustic signals controlled by EK80 are automatically turned off while the is active. Calibration Wizard The following operating requirements must be met for each set of circles: •...
  • Page 16 Calibrating the ADCP system The ADCP raw data which is stored while running the will automatically Calibration Wizard be named accordingly: • This is a required file for all replay processes. CI - initialization file Example: CIADCPCalibration-DYYYYMMDD-T1XXX • - These are the raw files for the first set of circles. C1 - circle set 1 Example: C1ADCPCalibration-DYYYYMMDD-T1XXX...
  • Page 17 Next On the second page in the wizard: Select which channel to calibrate. If you have several ADCP channels for your EK80 system, they are calibrated individually, one by one. 110-0037585/A...
  • Page 18 Select Start triggers a setup of the EK80 parameters for calibration, such as maximum Start power, ping, it triggers a check that motion data is received within an acceptable rate, sea bottom is detected and that initialization data is recorded correctly.

  • Page 19: Circle Calibration For Adcp In Replay

    Finish 12 In the dialog box that opens select if you want the new calibration values for yaw, pitch, roll x- and y- offset and scale to be implemented in the EK80 software. The terminates automatically. Calibration Wizard Related topics...
  • Page 20 Calibrating the ADCP system • Raw data for a circle calibration has been recorded in advance • A computer with EK80 installed Context Data collection has been done following a circular sailing pattern. The raw data has been stored in a file system and used for a new calibration.

  • Page 21: Reprocessing Calibration Results For Adcp

    If you are calibrating using the Processing Unit which was used for obtaining the raw data you can update your settings and the EK80 system is calibrated for ADCP. If you are using another computer to process the raw data, you move the xml-file (which are your results from the calibration) to the Processing Unit and perform a Reprocess calibration of the data.
  • Page 22 Calibration Wizard Calibration Results In the dialog box which appears select if you want the new calibration values for yaw, pitch, roll x- and y- offset and scale to be implemented in the EK80 software. The terminates automatically. Calibration Wizard 110-0037585/A...

  • Page 23: Functions And Dialog Boxes

    "wizard" that takes you through the Calibration calibration process. Prerequisites Calibration can only be started with the EK80 system in either Normal or Replay mode. How to open This function is opened from the menu.

  • Page 24: Calibration Wizard Dialog Box #1

    ADCP data. All echo data are stored in RAW files. The information provided by the calibration is entered into the EK80 software as operational parameters. This is done automatically.

  • Page 25: Calibration Wizard Dialog Box #2

    Adding a new transducer to a previously calibrated EK80 system requires a calibration of the new channel. Reconnecting an already calibrated transducer and transceiver pair, the old calibration data may be retrieved and used. A new calibration is not required.

  • Page 26: Calibration Wizard Dialog Box #2 Reprocess

    Prerequisites can only be opened from within the calibration process. Calibration Wizard How to open To open the , place the EK80 system in either Normal or Replay mode, Calibration Wizard then select on the menu. Calibration Setup...

  • Page 27: Options In The Calibration Wizard

    Prerequisites can only be opened from within the calibration process. Calibration Wizard How to open To open the , place the EK80 system in either Normal or Replay mode, Calibration Wizard then select on the menu. Calibration...

  • Page 28: Calibration Wizard Dialog Box #3 Real Time

    Once the processing is finished you can save the results, and update the calibration data used by the EK80 system. Prerequisites can only be opened from within the calibration process. To open Calibration Wizard , place the EK80 system in either Normal or Replay mode, then Calibration Wizard select on the menu.
  • Page 29 EK80 User manual for ADCP calibration This page displays options and results for real-time circle calibration. On the left hand side the progress of the calibration process is displayed visually using diagrams and drawings . The progress of the calibration process is displayed through the sailing pattern and the development of the calibration values (roll, pitch, yaw and angle and scale) as more raw data is obtained and processed for each ping.
  • Page 30 Functions and dialog boxes section displays the sailing path for the vessel as the calibration process Sailing Pattern progresses. Use the mouse wheel to zoom in/out on the sailing pattern for a better view. The sailing pattern is displayed in the same way both for replay and real-time calibration. Details Initialization In the...
  • Page 31 Green calibration process. Stable bottom detection Stable bottom detection is an indication of the EK80 system being able to detect the sea bottom. This is important in order to get good quality calibration results. • : No detection of sea bottom is found. Open the...
  • Page 32 Functions and dialog boxes Calibration Sequence section enables you to start and stop recording raw data for the Calibration Sequence first and second set of calibration circles. The status indicators will display the results of the different parts of the process. Start Recording Select to start recording raw data from the pings for the first and .
  • Page 33 The status indicator displays if the completion of the recording data from the two sets of circles has been a success. A success in this matter indicates that enough accepted pings have been received by the EK80 system. • : Less than 450 pings are accepted, await more pings being accepted before proceeding.
  • Page 34 Functions and dialog boxes • : The frequency is within acceptable limits. Please increase the input rate in Yellow order to improve information rate of the motion of the vessel before calibrating. • : The frequency is well within acceptable limits. Please proceed with the Green calibration process.
  • Page 35 EK80 User manual for ADCP calibration displays the calibration results on the scale, pitch, roll, yaw and offset Installation and Results values as they are estimated throughout the calibration process. The absolute value for all these parameters are displayed in three instances. The value used at the time of installation, the previous calibration and the result of the current calibration.

  • Page 36: Calibration Wizard Dialog Box #3 Replay

    Once the processing is finished you can save the results, and update the calibration data used by the EK80 system. Prerequisites Replay of calibration data can only be done when you have a valid set of replay files at hand.
  • Page 37 EK80 User manual for ADCP calibration How to open To open the , place the EK80 system in either Normal or Replay mode, Calibration Wizard then select on the menu. Calibration Setup Sailing pattern The sailing pattern section displays the path of the vessel as the calibration process progresses.
  • Page 38 Prior to starting the initialization in replay you need to upload the initialization raw files in the top bar of the EK80 user interface. The files are always prefixed using CI. These initialization raw files contain data setup for the calibration process.
  • Page 39 EK80 User manual for ADCP calibration In the section you observe the progress of the ADCP calibration Calibration Sequence process. You can monitor the progress in the section to get a visual overview Sailing Pattern of the ADCP calibration. First set of calibration circles Second set of calibration circles Follow the replay of the first and second set of calibration circles in these sections.
  • Page 40 Functions and dialog boxes RMS Error indicates the success of a calibration process. The value itself is the RMS Error average measurement error within a defined interval. The measurement error is define as the difference between the velocities measured by the ADCP system transformed into earth coordinates and the global velocities provided by the GPS.
  • Page 41 EK80 User manual for ADCP calibration • : Rotation around the side-to-side axis is called pitch. A positive value indicates Pitch a rotation upwards.This is an absolute value, the sum of the installation pitch angle and the calibration adjustment pitch value.
  • Page 42 Functions and dialog boxes datagram displays the depth measured during the calibration survey. The depth Depth measured in each ping and should ideally be 50-250 meters for a calibration process. Related topics Functions and dialog boxes, page 22 Calibrating the ADCP system, page 11 110-0037585/A...
  • Page 43 ©2023 Kongsberg Maritime AS...
  • Page 44 Switchboard: +47 815 73 700 KONGSBERG MARITIME Global support 24/7: +47 33 03 24 07 Strandpromenaden 50 E-mail sales: km.sales@km.kongsberg.com P.O.Box111 E-mail support: km.support.science@kongsberg.com kongsberg.com/maritime...

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