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Bartington Grad-13 Series Operation Manual

Digital three-axis magnetic gradiometer
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Operation Manual for
Grad-13 Digital Three-Axis Magnetic
Gradiometer

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Summary of Contents for Bartington Grad-13 Series

  • Page 1 Operation Manual for Grad-13 Digital Three-Axis Magnetic Gradiometer...

  • Page 2: Table Of Contents

    BARTINGTON INSTRUMENTS Table of Contents 1. About this Manual 1.1. Symbols Glossary 2. Safe Use 3. Introduction 4. Grad-13 Digital Three-Axis Fluxgate Gradiometer 4.2. Grad-13 Battery Box & Multiplexing box 4.3. Grad-13 Cable Assembly 5. Grad-13 Battery Box 5.1. Functional Description 5.2.
  • Page 3 BARTINGTON INSTRUMENTS 10. Servicing & Maintenance 11. End of Life Disposal 11.1. Waste Electrical and Electronic Equipment (WEEE) Regulations 37 Appendix A: Guidance for Connection to Mains Supply DCN1040 Page 3 of 39 OM3100/2...

  • Page 4: About This Manual

    Note that failure to follow the instructions in this manual may invalidate your product’s warranty. If in doubt, do not hesitate to contact Bartington Instruments. Bartington Instruments cannot advise on the integration of this equipment with any third party products.

  • Page 5: Grad-13 Digital Three-Axis Fluxgate Gradiometer

    BARTINGTON INSTRUMENTS As well as magnetic field gradient data, the RS422 output also includes 3 axis accelerometer data, as well as temperature information. Battery and multiplexing boxes are available to power and convert the Grad-13 output. 4. Grad-13 Digital Three-Axis Fluxgate Gradiometer Figure 1: Grad-13 Digital Three-Axis Fluxgate Gradiometer 1.

  • Page 6: Grad-13 Battery Box & Multiplexing Box

    BARTINGTON INSTRUMENTS 4.2. Grad-13 Battery Box & Multiplexing box Bartington Instruments can provide two options for powering the Grad-13 and converting the signal output to either USB or ethernet output. These options are the Grad-13 Battery Box or the Grad-13 Multiplexing box.

  • Page 7: Grad-13 Battery Box

    This section describes the installation and operation of the Grad-13 Battery Box. 5.1. Functional Description The Grad-13 battery box allows connection of one or two Bartington Instruments Grad-13 gradiometers. It powers the gradiometer and converts the RS422 output to USB. A rechargeable battery is built into the box and a dedicated charger is provided with the unit.

  • Page 8: Power Supply

    BARTINGTON INSTRUMENTS The units are housed in a polycarbonate enclosure. Connectors on the front panel provide connection to the Grad-13 and to a PC for digital output, with a socket for the charger input. 5.3. Power Supply The battery box contains a lithium ion battery with a nominal voltage of 26V and an energy density of around 72Wh.

  • Page 9: The Grad-13 8 Port Multiplexing Box

    Bartington Instruments website. Figure 3: The Grad-13 8 Port Multiplexing box 6.1. Functional Description The Grad-13 Multiplexing box is designed to allow connection of up to eight Bartington Instruments Grad-13 gradiometers simultaneously. It provides power, and acts as a junction DCN1040...

  • Page 10: The 8 Port Multiplexing Box Front Panel

    BARTINGTON INSTRUMENTS box for the RS422 data outputs. The multiplexing box will combine and transmit the received RS422 data from each gradiometer on a single Ethernet connection to an external laptop or data recording system. A fully charged battery will run the system with eight gradiometers for approximately 8 hours.
  • Page 11 BARTINGTON INSTRUMENTS flashes when the corresponding channel is communicating with the external recording device. 2: Data Output: This 10 way connector takes the Ethernet signal from the unit to provide data for a laptop or portable recording device. The connecting cable provided has the 10 way mating connector on the Multiplexer Box end, and a standard ethernet connector on the other (8P8C/RJ45).

  • Page 12: Power Supplies

    BARTINGTON INSTRUMENTS 6.3. Power supplies 6.3.1. Internal Battery The unit is fitted with a 26V lithium ion battery of approximately 320 watt hours capacity. WARNING: The unit contains a Lithium Ion Rechargeable battery pack. It must be charged with the supplied charger only. Non-approved chargers will cause permanent damage to the batteries.
  • Page 13 BARTINGTON INSTRUMENTS WARNING: The charger mains voltage selector switch must be in the appropriate position, i.e. either set to 230V or 125V. The internal battery must be charged with the supplied charger only. On the front of the charger there are two LEDS that will light up to indicate it is powered and...

  • Page 14: Fuses

    For safety reasons, the battery (comprising four separate assemblies) has four internal fuses. These are not customer replaceable and in the event of the fuses blowing, the device must be returned to Bartington Instruments for repair. 7. Installation of the Grad-13 7.1.

  • Page 15: Connecting

    Bartington Instruments supply a basic software, VisualGrad13, for communication with the Grad- If the user wishes to expand upon this or create their own software, this is simplified by using the API which is documented in data protocol DP0105, available on request from Bartington Instruments.
  • Page 16 BARTINGTON INSTRUMENTS 8.2.2. Installing the Brainboxes USB to Serial drivers To install the Brainboxes USB to Serial drivers run the Brainboxes Setup.exe, without plugging in the device. Accept all default options during installation. The Grad 13 should then be plugged in (including the USB lead to Battery box). Plug the Grad- 13 into the Battery box and turn it on.
  • Page 17 BARTINGTON INSTRUMENTS Figure 7: Visual Grad-13 Software Main Window 8.2.4.1. Connecting to a Grad-13 Connect: The ‘Connect’ button is used to connect the software to the Grad13, the device connection window shown in Figure 8 will then be displayed. Note: the Grad 13 needs to be plugged in and powered before trying to connect.
  • Page 18 BARTINGTON INSTRUMENTS Configure Connections Before you can connect to a Grad-13 device, or if you wish to edit a connection, you need to use the ‘Configure Connections’ option in the ‘Connect to a Grad-13’ window to set up your connections. Clicking on this will display the window shown in Figure 9: Figure 9: The ‘Manage Grad Connections’...
  • Page 19 Note: The Baud Rate has to be programmed in the Grad 13, therefore in most cases the default rate should be used. The exception to this is when the Baud rate has been changed by Bartington Instruments in order to output the full 200Hz bandwidth. Ethernet Settings Input the ‘IP Address’...
  • Page 20 BARTINGTON INSTRUMENTS Successful Connection When you successfully connect to your Grad-13 device, the Visual Grad-13 application window options will change as shown in Figure 12: Figure 12: Main window following successful connection to Grad-13 This window now gives the options to start a scan, display graphs or disconnect from the Grad- Note: Connections can fail if the Grad-13 device is not connected, connected to the wrong connection, not powered, or incorrectly configured.
  • Page 21 When a scan is started, a window is displayed that allows the location of the .pct file to be specified, as well as allowing notes to be entered for the scan. These notes are stored within the .pct scan file and may be refered to later, this window is shown in Figure 14. Figure 14: Scan Notes Click on ‘Start Scan’...
  • Page 22 Note: The Visual Grad-13 software will sometimes slow down the display of data on the screen when the PC it is running on is unable to handle screen updates at the rate that the data is being collected at (scans are coming in at ~200 scans per sec). This does not slow the data gathering or data storage.
  • Page 23 The first tickbox, ‘Use Calibration Details from:’, allows a user to select an alternate calibration file to apply to the Grad-13 data. This option is primarily for use by the Bartington Instruments technical team to apply additional calibration values should it be required. The file is in.txt format, and can be edited using Notepad.
  • Page 24 A graph has three modes which are available by clicking on the buttons on the left side of the graph: Live: displays the last ~15 secs of scans. • • All: displays all scans (up to a maximum of 1000000 scans). Pause: pauses the current “Live”...
  • Page 25 BARTINGTON INSTRUMENTS The ‘Auto Scale’ button allows the Y scale to scale automatically based on the selected items in the graph when in Pause mode. 8.2.4.6. Exporting Data The ‘Export to Excel’ button will export the data to Microsoft Excel .csv format and will open it in Excel if it is installed.
  • Page 26 BARTINGTON INSTRUMENTS 8.2.4.7. Data Processor This application processes the data from the Grad13 Master application, it works with the files that the VisualGrad13 Master application creates and is used to send the data to Excel. Figure 21: Data Processing Window • ‘Open...’: this opens a .pct data file (the Grad13 master application uses the .pct file type to...

  • Page 27: Multigrad13 Software

    BARTINGTON INSTRUMENTS 8.3. MultiGrad13 Software When using an array of Grad-13 sensors for survey purposes the MultiGrad13 software can be used to log the data output. 8.3.1. MultiGrad13 Interface The main window is shown in Figure 22. A list of current surveys will be shown in the centre, if no surveys have been taken this will be blank.
  • Page 28 BARTINGTON INSTRUMENTS Any existing Grids will be displayed in the box in the lower half of the window. Figure 23: New Survey Window New Grid: Creates a new grid and opens the ‘Grid Settings’ window. Edit Grid: When an existing grid is selected from the list, this button can be used to return to the grid window and view, edit or continue the grid.
  • Page 29 measurements, where you start each traverse from opposite ends, or ‘Parallel’ measurements, where each traverse is started from one side of the grid. Selecting ‘Push’ or ‘Pull’ will allow the software to determine the correct X and Y position of each sensor depending on whether the cart is being pulled or pushed.
  • Page 30 BARTINGTON INSTRUMENTS To set up a new connection or to choose which Grad13 to connect, select the ‘Connect’ button and a new window, shown in figure 27, will pop up. Figure 27: Grad-13 Connection Window This window allows you to select and choose which Grad-13 to connect. The desired Grad-13 can be chosen from the list and then connected using the ‘Connect’...
  • Page 31 BARTINGTON INSTRUMENTS ‘Remove’: this button can be used to delete the currently selected connection ‘Close’: Return to the previous window. Clicking ‘Add’ will bring up the connection configuration window in figure 29. Figure 29: Connection Configuration This section needs to be correctly set up in order for a connection to be made, and for the position of the sensor to be recognised by the software.
  • Page 32 BARTINGTON INSTRUMENTS Ethernet Connection: This should be chosen if connecting via Ethernet. In this case the IP address of the multiplexing box, and the Port for each Grad-13 connection, will be labelled on the box. Once the connection settings have been input, clicking ‘Test’ will attempt to connect to the Grad- 13 and inform you whether it has been successful.
  • Page 33 BARTINGTON INSTRUMENTS 8.3.3. Scan Configuration Using the ‘Settings’ button prior to the scan will bring up additional options and allow the walking speed to be changed if necessary. Once a scan has begun the walking speed will be fixed and further changes will not be possible. Figure 31 below shows the Settings window.
  • Page 34 BARTINGTON INSTRUMENTS Clicking on ‘Configure Walking Speed’ brings up the windows shown in figure 32. Figure 32: Configure Walking Speed This window allows you to set the walking speed for data acquisition purposes. The software will acquire data based on this speed and the size of grid entered, so it is important that this is accurate.
  • Page 35 BARTINGTON INSTRUMENTS 8.3.4. Running a Scan To begin the scan, press ‘Start’. As soon as this button is pressed the software will begin recording the data being received by each connected Grad-13 and will display it on the graph. See figure 33 below for an example acquisition using a single Grad-13.

  • Page 36: Storage

    BARTINGTON INSTRUMENTS Survey file: Contains the survey name, the grid name, and any notes that were entered. CSV file: This file lists the raw data recorded from each gradiometer in comma separated values, there will be a separate file for each line walked. At the top of the file grid information such as the time of survey and number of readings is displayed.
  • Page 37 BARTINGTON INSTRUMENTS 10. Servicing & Maintenance The Grad-13 contains no user-serviceable components and must be returned to Bartington Instruments for repair or re-calibration. The Grad-13 battery and multiplexing boxes require no routine maintenance and have no internal user serviceable parts.
  • Page 38 BARTINGTON INSTRUMENTS Appendix A: Guidance for Connection to Mains Supply 1. Ensure that the mains feed is from a clean AC supply with the following characteristics:- Voltage Range 100V to 240V AC (Selectable on Charger) Frequency 50/60Hz It is highly recommended that this mains feed is via an appropriate Residual Current Circuit Breaker, rated at 30mA trip current.
  • Page 39 The copyright of this document is the property of Bartington Instruments Ltd. Bartington® is a registered trade mark of Bartington Instruments Limited in the following countries: United Kingdom, Australia, Brazil, Canada, China, European Union, India, Japan, Norway and the...

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