Valeport MIDAS Surveyor Operation Manual
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Valeport MIDAS Surveyor Operation Manual

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Document Ref:
0420805
Date:
October 2003
This confidential document was prepared by the staff of Valeport Limited, the Company, and is the property of the
Company, which also owns the copyright therein. All rights conferred by the law of the copyright and by virtue of
international copyright conventions are reserved to the Company. This document must not be copied, reprinted or
reproduced in any material form, either wholly or in part, and the contents of this document, and any method or technique
available therefrom, must not be disclosed to any other person whatsoever without the prior written consent of the
Company.
Valeport Limited,
St. Peter's Quay,
Totnes,
Devon, TQ9 5EW,
UK
As part of our policy of continuous development, we reserve the right to alter, without prior notice, all specifications,
designs, prices and conditions of supply for all our equipment.
Copyright ©2003
MIDAS Surveyor Operating Manual
VALEPORT LIMITED
M
Surveyor
IDAS
Operation Manual
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© Valeport Limited 2003
+44 (0)1803 869292
+44 (0)1803 869293
sales@valeport.co.uk
www.valeport.co.uk
0420805d.doc

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Summary of Contents for Valeport MIDAS Surveyor

  • Page 1 October 2003 This confidential document was prepared by the staff of Valeport Limited, the Company, and is the property of the Company, which also owns the copyright therein. All rights conferred by the law of the copyright and by virtue of international copyright conventions are reserved to the Company.

  • Page 2: Table Of Contents

    © Valeport Limited 2003 CHAPTER DESCRIPTION PAGE INTRODUCTION ....................................4 SPECIFICATION ....................................5 MIDAS Surveyor ..................................5 Transducers ..................................... 5 2.2.1 High frequency ................................. 5 2.2.2 Low frequency .................................. 5 GPS ......................................5 2.3.1 12 Channel GPS ................................5 2.3.2 16 Channel GPS ................................
  • Page 3 ASCII Data Files ................................34 5.6.1.1 ASCII File Data Format ............................35 5.6.2 Discarding Erroneous Depth Data........................... 36 5.6.3 Valeport Format Files ..............................36 5.6.4 XYZ Format Files ................................38 About ...................................... 39 WIRING SCHEDULES ................................... 40 EQUIPMENT SUPPLIED ................................46 GUARANTEE CERTIFICATE .................................

  • Page 4: Introduction

    SurveyLog. The MIDAS Surveyor is a hydrographic survey system, logging a time series of position and depth data. Real time data is displayed on the integral graphics LCD screen and output in a variety of industry standard formats, and all logged data may subsequently be uploaded to PC.

  • Page 5: Specification

    12 CHANNEL GPS Type Ashtech A12 DGPS receiver module. Differential Onboard SBAS Correction Accuracy ±2m (CEP), ±4m (95%) with SBAS correction Update Rate Combined GPS / SBAS plane antenna (IP67), 5m cable Antenna 0420805d.doc MIDAS Surveyor Operating Manual Page 5...

  • Page 6: Channel Gps

    Antenna 2.3.3 OPTIONAL IALA MARINE BEACON RECEIVER If fitted with the standard 12 Channel GPS receiver, the MIDAS Surveyor may also be optionally supplied with an external combined IALA Marine Beacon Antenna and Receiver: CSI SBA-1 IALA Beacon Receiver Type 283.5 –...

  • Page 7: System Installation

    Note that the instrument is initially nominally set up for a sound velocity of 1500m/s. The user may wish to alter this according to measured sound velocity data, or by using a bar check method. The Valeport SoundBar 2 Digital Bar Checker may be used to provide appropriate sound velocity and draft settings, or a more traditional bar check procedure may be carried out.

  • Page 8: Antennae

    External GPS / Differential input connector on the main MIDAS Surveyor unit. BATTERIES The system is fitted with 4 x 2.1Ah sealed lead acid batteries. These are shipped from Valeport fully charged, but the user would be wise to recharge them before relying on them in a field deployment.

  • Page 9: Memory

    Heave sensor to measure the rapid changes in vertical position of the transducer. If the vessel is fitted with such a sensor, its output may be logged by the MIDAS Surveyor and used to correct the depth readings in real time.

  • Page 10: Sound Velocity

    Details of how to do this are given in Section 4.2.9.3. It is possible however for the MIDAS Surveyor to log sound velocity data whilst a survey is in progress, and this may be used to provide data correction during post processing (the SurveyLog software makes no provision for this).

  • Page 11: Operation

    © Valeport Limited 2003 OPERATION The MIDAS Surveyor is operated by means of a 16 button membrane keypad, illustrated below: Surveyor IDAS GPS Echosounder Menu Help Contrast Light Enter The basic function of each key is as follows. More detailed descriptions are covered in subsequent sections of this manual: Turns instrument on.

  • Page 12: Run Mode

    The operating status of the instrument at switch on will depend on how it was previously turned off: • If a normal, controlled shutdown has been performed (by pressing the Off key), the MIDAS Surveyor will show data on screen, but it will not be immediately recorded until the user instructs the instrument to do so.

  • Page 13: System Setup

    • Once a function has been accessed, the arrow and Enter keys will be used to make changes. • The Escape key will move back up one menu level. 0420805d.doc MIDAS Surveyor Operating Manual Page 13...

  • Page 14: Logging Setup

    The Log Pause function may be accessed through the menu system; use up and down arrows to toggle logging ON or OFF, and Enter to confirm. Alternatively, the F4 key in the Run screen will allow the Pause function to be toggled on and off. 0420805d.doc MIDAS Surveyor Operating Manual Page 14...

  • Page 15: Set Ident No

    Sound Velocity Interval The MIDAS Surveyor will accept a real time input from a Valeport Sound Velocity sensor. Whilst this input is not used to provide real time correction of the Depth data, it may be useful in post processing functions. Data from these sensors is at variable rates, from 16Hz to 1Hz;...

  • Page 16: Tide Interval

    4.2.4 RS232 COM PORTS The MIDAS Surveyor is fitted with a total of 7 serial ports for data input / output. This sub-menu allows the baud rate of each port to be configured to suit. Data output is only available on the Main Port - this should also be used for all PC communications. The remaining ports are numbered 1 to 6, and are configured for use with the following data input types.

  • Page 17: Output Setup

    OUTPUT SETUP The MIDAS Surveyor will output data in real time. You may choose which parameters to output, and a selection of formats for each. For each parameter, use the up and down keys to scroll through the available formats detailed below (and OFF), and Enter to confirm the selection.
  • Page 18 Sound Velocity, Tide, Heave and Aux/Gyro data outputs may also be individually turned on or off. When on, the instrument will simply echo the incoming data strings in the output data, as they are received. 0420805d.doc MIDAS Surveyor Operating Manual Page 18...

  • Page 19: Display Setup

    Use the up and down keys to scroll up and down the back light range from 0 to 100%, using Enter to confirm. Alternatively, the Light button on the front panel will scroll up through the light intensity range in slightly larger increments. 0420805d.doc MIDAS Surveyor Operating Manual Page 19...

  • Page 20: Geodetic Setup

    Geodetic Setup menu. Each spheroid is defined by 9 parameters, two of which define the shape of the spheroid, and 7 of which define the datum of the spheroid. The MIDAS Surveyor allows all of these 9 parameters to be set as required.

  • Page 21: Defaults

    4.2.8.1 Internal/External Echosounder The MIDAS Surveyor may use either its integral echosounder and transducer or a depth input from an external digital device. Alternatively, depth sounding may be disabled entirely. Use the arrow keys to toggle between internal echosounder, external echosounder, or disabled, and Enter to confirm.

  • Page 22: E/S Velocity

    0.5m draft for both high and low frequency transducers. 4.2.8.4 Metres/Feet The MIDAS Surveyor may display data in either metres or decimal feet. Use the up or down key to toggle between the two units, and Enter to confirm. 4.2.8.5 Gating Under certain circumstances, it may be desirable to eliminate echoes from outside an expected range.

  • Page 23: Vertical Scale

    4.2.9.2 GPS Reset Each time the MIDAS Surveyor is turned on, it will attempt to reacquire its satellite fixes. If this fails, the user may force a reset using this function. If satellite acquisition repeatedly fails, check antenna position and cable connections.

  • Page 24: Antenna Offset

    Available sources are from GPS Height (suitable if an external RTK system is being used), TIDEGAUGE, which the default format for the Valeport Model 740 tide gauge. There are also 6 generic formats,...

  • Page 25: Heave Sensor

    Set PIC Op Modes The data input from each device fitted to the MIDAS Surveyor is controlled by a small microprocessor called a PIC (Programmable Integrated Circuit). As standard, each PIC is set to accept data inputs at a maximum of 16Hz. However, certain input devices may have data rates much higher than this (e.g.

  • Page 26: Time Setup

    Some locations use 1/2 hour time zones rather than the standard 1 hour increments. Since GPS timings are given as time past the hour, the MIDAS Surveyor must include a feature to allow it to correct the time to the nearest 1/2 hour. If the local time zone is a 1/2 hour zone, go to the last function in the Time Setup sub-menu, labelled "Time Zone 1/2hr".

  • Page 27: Beep, Relay, Etc

    Relay The MIDAS Surveyor is fitted with a relay switch to provide control to external systems. The relay is closed each time a Fix is made, and the user can control the duration of closure on an arbitrary scale from 0 (OFF) to 10 (approximately 1.5 seconds).

  • Page 28: Utilities

    ‘MENU’ key emulates ‘HELP’ < emulates ‘CONTRAST’ > emulates ‘LIGHT’ ← emulates LEFT ARROW → emulates RIGHT ARROW ↓ emulates DOWN ARROW ↑ emulates UP ARROW emulates ESCAPE emulates ENTER 0420805d.doc MIDAS Surveyor Operating Manual Page 28...

  • Page 29: Setup Marine Beacon Frequency

    Setup Marine Beacon Frequency If using the CSI SBA-1 Marine Beacon Receiver with the MIDAS Surveyor, it is possible to setup up the Beacon Receiver through the Surveyor keypad without having to resort to the PC program supplied by CSI. This function allows you to scroll through the range of Beacon frequencies from 283.5 to 325kHz, or to set the Receiver in Automatic mode, where it...

  • Page 30: Surveylog Software

    INTRODUCTION SurveyLog is the user interface program supplied with the MIDAS Surveyor GPS Echosounder system from Valeport Ltd. The program is written in Delphi, and will run on all PCs operating Windows 95 or above. As is the nature of all software, the faster the computer, the better the software will perform.

  • Page 31: Establishing Communications

    Click the “Get File Table” button. SurveyLog will now interrogate the MIDAS Surveyor, and obtain a list of all the data files stored in the instrument memory. A new file will have been created each time logging has been turned ON (but not from Pause mode).

  • Page 32: File Management & Data Upload

    Further data viewing does not require the MIDAS Surveyor to be connected to the PC. If the baud rate has been increased for data upload purposes, it can now be reset by clicking the “Set Baud 19200” button. Note that the button will revert the baud rate to whatever it was before it was increased.

  • Page 33: Translating Data

    Finally, the Valeport format file may be further translated into an XYZ (CAD) file of 3 dimensional data. Click the “Translate Valeport to XYZ” button, and select the required file. The XYZ file will then be generated. For details of how to view this file, refer to Section 5.6.2.

  • Page 34: Viewing Data Files

    Open. The data may then be viewed by clicking the ASCII Data tab at the top of the page. This data may be viewed and copied into external programs, but may not be edited & saved within SurveyLog. 0420805d.doc MIDAS Surveyor Operating Manual Page 34...

  • Page 35: Ascii File Data Format

    Uncorrected Depth + Heave + Tide Ident No HF depth (m) LF depth (m) Heave correction value (cm) Tide Correction value (cm) Uncorrected Depth + Tide Ident No HF depth (m) LF depth (m) Tide Correction value (cm) 0420805d.doc MIDAS Surveyor Operating Manual Page 35...

  • Page 36: Discarding Erroneous Depth Data

    It is a fact of hydrographic surveying that occasional spurious data points will be encountered from false echoes. SurveyLog allows such points to be ignored in Valeport and XYZ files. Simply set the lower and upper limits for valid data points before clicking on either the “View Translated VAL File” or the “View Translated XYZ file” buttons. In the example screen shown under Section 5.6, points below 0.0 and above 100.0m depth will be ignored.
  • Page 37 All logged parameters may be viewed on the graph, which has multiple Y axes. To display/remove a parameter from the graph, simply check/uncheck the label at the top of the plot. 0420805d.doc MIDAS Surveyor Operating Manual Page 37...

  • Page 38: Xyz Format Files

    XYZ FORMAT FILES Like the Valeport format files, XYZ files may be viewed in either a list or graphical format. Two XYZ files will be created for each data file, one for the High Frequency data (_____XZH.nnn) and one for Low Frequency data (_____XZL.nnn).

  • Page 39: About

    This graph shows the survey track, with the X axis corresponding to Longitude and the Y axis to Latitude. The Fix Mark annotations are numbered sequentially. ABOUT The About page lists contact details for Valeport, together with the version number of the SurveyLog program: 0420805d.doc MIDAS Surveyor Operating Manual...

  • Page 40: Wiring Schedules

    © Valeport Limited 2003 WIRING SCHEDULES The following pages contain cableforms as detailed below: 0420WO.C00 Midas Surveyor cableform Layout 0420C08 - Echo Sounder Line Connector to Junction Box 0420C09 - Echo Sounder 33KHz Transducer to Junction Box 0420C10 - Echo Sounder 210KHz Transducer to Junction Box...

  • Page 41: Junction Box

    :1972 Midas Sur veyor Boar d (0420500) 3RD < PROJ. 0420C06.doc AERIAL AERIAL A E RIA L LINE CONNECTOR 0420C18.doc (Sw itched Ext PWR Out) 0420C00.doc (Comms I/O) 0420C01.doc (PWR/Charge LED) (PWR IN ) Battery Pack 0420C07.doc Batter y Ter minals Fuse Holder Batter y Charger Board 0420C02.doc...
  • Page 42 END 2 : WIRE Junction Box FUNCTION WIRE WIRE TYPE LENGTH Transducer COLOUR (mm) BLUE SIG+ (variable) (210KHz) 2 CORE 210KHz SIG- SCREENED Connector block supplied (variable) Transducer (210KHz) FLYING LEAD SCREEN SCREEN 0420805d.doc MIDAS Surveyor Operating Manual Page 42...
  • Page 43 +12v OUT OF MIDAS 17-2462) Connect to BLACK Banana receptacle using 50cm black 7/0.2 wire, heatshrink joint inside D connector Connect to RED Banana receptacle using 50cm red 7/0.2 wire, heatshrink joint inside D connector 0420805d.doc MIDAS Surveyor Operating Manual Page 43...
  • Page 44 GPS OUT 7 CORE WHITE GPS IN SCREENED 6 Way 24AWG, 6.2mm YELLOW GPS DIFF IN 1000 SE103A057-130/6.2 CONNECTOR BLOCK GREEN SIG/PWR GND DIAMETER BLUE GPS DIFF OUT PROP785 +12v OUT (BIPTN AF507) 0420805d.doc MIDAS Surveyor Operating Manual Page 44...
  • Page 45 Cable drain Antenna GND (bare wire) SCREENED As supplied 6 Way female as supplied Connector block FLYING Braided Cable Antenna GND LEAD Shield Power +(9-16vDC) BLUE Beacon Tx Data GREEN Beacon Rx Data 0420805d.doc MIDAS Surveyor Operating Manual Page 45...

  • Page 46: Equipment Supplied

    210kHz/33kHz transducer c/w 10m cable, bracket and clamps DC input cable RS232 output cable RS232 input cable for external channel Remote Fix Button Transit Case for Accessories Software SurveyLog CDROM Documentation Beacon Receiver Manual Operating Manual SIGNED …………………………. DATE ……………………… 0420805d.doc MIDAS Surveyor Operating Manual Page 46...

  • Page 47: Guarantee Certificate

    Any consequential loss or damage of any kind whatsoever. For any defect or deficiency judged by Valeport Limited to be caused by wear and tear or of improper or unskilled handling of the goods or by any repair or attempted repair or dismantling by any one other than Valeport Limited or persons authorised to do so by Valeport Limited.

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