GDD GRx2 Instruction Manual
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GDD GRx2 Instruction Manual

Induced polarization receiver
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IP RECEIVER
Model GRx2
Instruction Manual
860 boul. de la Chaudière, suite 200
Québec (QC), Canada, G1X 4B7
Tel.: +1 (418) 877-4249
Fax: +1 (418) 877-4054
E-Mail: gdd@gdd.ca
Web site: www.gdd.ca

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  • Page 1 IP RECEIVER Model GRx2 Instruction Manual 860 boul. de la Chaudière, suite 200 Québec (QC), Canada, G1X 4B7 Tel.: +1 (418) 877-4249 Fax: +1 (418) 877-4054 E-Mail: gdd@gdd.ca Web site: www.gdd.ca...

  • Page 2: Table Of Contents

    Table of contents Introduction ..................... 4 GRx2 accessories ....................5 GRx2 components .................... 7 Power ......................9 Quick start guide .................... 11 RS232/Bluetooth communication ..............21 Cold weather and harsh environments tips ............. 22 Tools menu ....................23 Config option ..................... 25 8.1.1 Setup ......................
  • Page 3 9.2.3 Transferring file(s) from the Archer to a desktop PC ........80 USB connection ..................82 Bluetooth configuration ................. 84 GDD Rx software update ................89 Troubleshooting ..................... 92 Technical help ....................98 Specifications ....................99 14.1 General specifications ..................99 14.2 Technical specifications ..................

  • Page 4: Introduction

    Introduction The highly sensitive GDD IP Receiver (model GRx2) is a compact unit designed for high productivity resistivity and time-domain induced polarization (IP) surveys in mineral exploration, groundwater exploration, geotechnical investigations and other related fields. It features high capabilities allowing it to work in any field conditions. It can be configured for multi-pole or multi-dipole reception.

  • Page 5: Grx2 Accessories

    IP receiver, model GRx2 Archer Field computer with one rechargeable 10600mAh Li-Ion battery, one hand strap and one capacitive stylus GRx2 IP receiver wall charger with international plug kit (universal voltage) Red and black banana cables Archer AC charger with international plug kit (universal voltage) Rugged serial communication cable 9 pos D-SUB female - 9 pos.
  • Page 6 Instrumentation GDD Inc. 2017-12-07...

  • Page 7: Grx2 Components

    PDA. The red light indicates WIRELESS position. C - ON/OFF switch This switch is used to turn the GRx2 ON. The red light indicates ON. D - CHARGER connector This connector is used to charge the battery of the receiver with the wall power supply.
  • Page 8 In dipole configuration, the numbered terminals are differential terminals. G - SELF-TEST terminal This terminal is used to perform a self test. H - GPS connector (SMA) This connector is used to connect an external GPS antenna (SMA). Instrumentation GDD Inc. 2017-12-07...

  • Page 9: Power

    Here are a few tips for using and storing your lithium-ion powered receiver: Usage • Using a different battery power supply than the one supplied by GDD could damage the batteries and the receiver. • The connector labelled CHARGER is used only to recharge the internal batteries.
  • Page 10 • If stored for several months, check the batteries charge level every six months and recharge them up to 50% if they are below 30% charge. Never store fully charged or completely discharged Lithium-Ion batteries for an extended period. Instrumentation GDD Inc. 2017-12-07...

  • Page 11: Quick Start Guide

    GDD Rx program. 1. Connect electrodes into terminals. 2. Turn ON the IP receiver using the ON/OFF switch on the GRx2 panel. 3. Select the communication mode using the CABLE/WIRELESS switch on the GRx2 panel.
  • Page 12 6. Tap on the GDD Rx program icon in the Favorites bar of the Home Page. Title bar Dashboard Favorites Tile bar 7. Select the communication mode: RS-232 (CABLE) or BLUETOOTH (WIRELESS). You can move back and forth between the different actions using the tab button ( ) of the keypad.
  • Page 13 Line number and direction Transmitter and receiver position Trigger channel count and voltage Memory number and Rx battery level OK button: close the GDD Rx program 9. Click START (or press , and on the keypad) to begin the acquisition procedure.
  • Page 14 Archer Field PC to enter numeric values. Use the tab button ( ) to advance the  cursor to the next tab stop. Click OK (or press shift +5 OK on the keypad) to continue. Instrumentation GDD Inc. 2017-12-07...
  • Page 15 IMPORTANT: F1 to F4 shortcut key are not available with the Archer Field PC. 13. The Contact and Noise graph appears. If the values displayed are normal, click OK  (or press shift +5 OK on the keypad) to close the window. Instrumentation GDD Inc. 2017-12-07...
  • Page 16 *Note: If all stations show an INFINITE contact, the reference electrode might be disconnected. 15. Enter the transmitter current and click CONFIRM to start the readings. 16. The following screens appear. Instrumentation GDD Inc. 2017-12-07...
  • Page 17 STOP/START buttons. To switch from one information to the other, use the following shortcut Key: “V” or click on the text label directly on the screen. If no transmitter information can be received at the GRx2, the following symbol will be displayed instead of I and P: N/A.
  • Page 18 If using the optional GDD-RTE01 communication box (refer to section 8.2.5) to collect live information broadcasted by the GDD Tx4 IP transmitter, this menu will show additional Tx current options to choose as the final “I” value. These are the first “I”...
  • Page 19 Change the current value if it has changed and click CONFIRM to save the current value. 20.1. If the REDO POSITIONS option is checked, enter the transmitter and receiver position and click OK. *Each position can be changed individually or moved by clicking Next or Prev. Instrumentation GDD Inc. 2017-12-07...
  • Page 20 Up and Down arrows to see all the channels. By clicking on Start, the program will automatically come back to the last acquisition and will start a new acquisition procedure. 21. Repeat steps 9 through 20 to take another set of readings. Instrumentation GDD Inc. 2017-12-07...

  • Page 21: Rs232/Bluetooth Communication

    RS232/Bluetooth communication 1. Select the “RS-232” communication mode to use the GRx2 with a serial communication cable. 2. Select the “BLUETOOTH” communication mode to use the GRx2 with a wireless connection. 3. The following screen appears and you are ready to begin.

  • Page 22: Cold Weather And Harsh Environments Tips

    7 Cold weather and harsh environments tips The GRx2 receiver is designed to be used in cold weather (up to -40°C) but it is very important to consider these few tips to prevent damages or malfunctions: 1. Never charge the internal batteries of the GRx2 in sub-zero;...

  • Page 23: Tools Menu

    • Test the GRx2 with the internal simulator • Set signal processing options • Select battery type (if not automatically detected) • Open Port (enables the RF (radio frequency) communication between GDD’s IP transmitter Tx4 and receiver using the optional GDD-RTE01 box. Instrumentation GDD Inc.
  • Page 24 Use the MEMORY option to: • See the History • Recall the previous memory • Clear the memory • Save data in a file About Use the ABOUT option to display GDD Rx software version number. Instrumentation GDD Inc. 2017-12-07...

  • Page 25: Config Option

    Pole-Dipole (1/32) • Pole-Pole (1/32) • Gradient (1/32) • Wenner • Schlumberger IMPORTANT: Dipole-Dipole (2/16), Dipole-Dipole (4/8), Pole-Dipole (2/16), Pole-Dipole (4/8) and other modes (2/16) or (4/8) are used with a 16 or 32 channels receiver only. Instrumentation GDD Inc. 2017-12-07...
  • Page 26 3. Check the active channel(s). Tap on the checkbox to select all channels or tap on the checkbox to unselect all channels. 4. Select the trigger channel, this channel is used for the synchronization process. Instrumentation GDD Inc. 2017-12-07...

  • Page 27: Position

    2. Enter line number and select line direction. Use the keyboard at the bottom of the screen or use the numeric keypad of the Archer Field PC. A negative number cannot be entered for line; the labels N, S, E and W are used to define direction. Instrumentation GDD Inc. 2017-12-07...
  • Page 28 4. Enter the separation between electrodes of the receiver. A negative number is used to define South and West direction. 5. Enter the transmitter and receiver electrodes moving distance. A negative number is used to define South or West direction. Instrumentation GDD Inc. 2017-12-07...

  • Page 29: Windows

    The WINDOWS option is used to set the signal timing and the mode. 1. Select Tools | Config | Windows. The following screen appears. 2. Select the maximum number of stacks. 3. Select the signal timing. Instrumentation GDD Inc. 2017-12-07...
  • Page 30 80, 80, 80, 80, 80, 80, 80, 80, 80, 80 • Semi logarithmic Windows: 20 Delay (ms): 40 Timing (ms): 2000 40, 40, 40, 40, 40, 40, 80, 80, 80, 80, 80, 80, 80, 160, 160, 160, 160, 160, 160, 160 Instrumentation GDD Inc. 2017-12-07...
  • Page 31 Timing (ms): user defined In the USER mode, you can load settings you have saved before, or you can create new settings. Click YES to load your settings from a previously saved file. This window will appear. Instrumentation GDD Inc. 2017-12-07...
  • Page 32 Click OK. The saved values will be loaded in the User defined mode. Click NO to manually enter the delay and window(s) width. Click OK when your settings are configured. Click YES to save your new settings. Instrumentation GDD Inc. 2017-12-07...
  • Page 33 Click NO if you do not want to save your User defined settings in a file. In all cases, you will be brought back to this display and the settings you have entered in the User defined window will be loaded into the Archer Field PC. Instrumentation GDD Inc. 2017-12-07...

  • Page 34: Synchronization

    1. Refer to Section 8.4 to verify if a satellite is being tracked by the GPS module of your receiver. 2. Select Tools | Config | Synchronization. The following screen appears. 3. Check Use GPS Time Synchronization to enable the GPS synchronization. Instrumentation GDD Inc. 2017-12-07...
  • Page 35 GPS. IMPORTANT: it does not confirm that your receiver is well synchronized with your transmitter. In the case that your transmitter and your receiver are not well synchronized together, your data could be erroneous. Instrumentation GDD Inc. 2017-12-07...
  • Page 36 IMPORTANT: During the acquisition process, if all your Vp values are negative, you can switch the polarity of the current transmission at the transmitter (switch the wires at the HV block) and all de Vp will become positive. Instrumentation GDD Inc. 2017-12-07...
  • Page 37 IMPORTANT: Even if the file indicates that your receiver is synchronized with the GPS time, it does not confirm that your receiver is well synchronized with your transmitter. In the case that your transmitter and your receiver are not well synchronized together, your data could be erroneous. Instrumentation GDD Inc. 2017-12-07...

  • Page 38: Special Option

    Please ensure your MEM number is the same than before having reinitialized your GRx2. If MEM displays a 0 value, you may need to exit the GDD_Rx software, wait 15 seconds and start the application again. The MEM should be back to its original count.

  • Page 39: Simulation

    The SIMULATION option is used to perform a self test with the internal waveform generator (you need to select the Pole-Pole configuration to use this option). 1. Short the SELF-TEST terminal with the channel(s) you want to test. The picture below shows a self-test with the two channels. Instrumentation GDD Inc. 2017-12-07...
  • Page 40 Turn ON the receiver. Select Tools | Config | Setup Select the Pole-Pole (1/32) array configuration. Instrumentation GDD Inc. 2017-12-07...
  • Page 41 Check the channel(s) you want to test. Click Ok. Select Tools | Special | Simulation Enter the waveform timing (default = 2000ms). Enter the primary voltage (default = 500mV). Enter the chargeability (default = 0). Instrumentation GDD Inc. 2017-12-07...
  • Page 42 It is important to disable the self-test output signal before starting a new acquisition process to prevent any erroneous values caused by the noise induced by the internal waveform generator. Go to simulation window and enter 0mV in the Voltage field. Instrumentation GDD Inc. 2017-12-07...

  • Page 43: Signal Processing Options

    2. Check the checkboxes of the settings you want to disable and click CONFIRM. Note that the gains and offsets are enabled (applied) every time you start the GDD Rx program again even if you disabled them the last time you used them.

  • Page 44: Battery Type

    8.2.4 Battery type With GRx8-32 firmware version 2.5.5 or higher, the GDD Rx program detects the type of batteries in the receiver automatically. It cannot be done with GRx2. Select Tools | About If a battery type is detected, the information will appear in the About pop-up window.

  • Page 45: Open Port

    Select the type of batteries in your receiver. All GRx2 receivers have Li-Ion batteries. If you select the wrong battery type, the battery level indicated in the main window of the GDD Rx program will be slightly different from the actual value.
  • Page 46 If the GDD-RTE01 box is not connected or defective, the following message will pop up. Instrumentation GDD Inc. 2017-12-07...

  • Page 47: Show Option

    8.3.1 Hotkeys The HOTKEYS option is used to display the shortcut keys menu. 1. Select Tools | Show | Hotkeys 2. The following screen appears. Use the shortcut keys to navigate quickly between the different options. Instrumentation GDD Inc. 2017-12-07...

  • Page 48: Pseudosection

    Location of readings Pseudosection of the CHARGeability or RESistivity (click on the label to switch between resistivity or chargeability) Pseudosection associated to selected Tx / Rx line Note: Use the hotkey ‘I’ to invert the Pseudo colors Instrumentation GDD Inc. 2017-12-07...
  • Page 49 To validate and go back to the pseudosection view, click on the OK button. 4. To visualize the whole pseudosection, use arrow buttons (shift + 4 or 6) on the PDA keyboard: Instrumentation GDD Inc. 2017-12-07...

  • Page 50: Signal

    1. Select Tools | Show | Show Signal 2. The following screen appears. Channel Selection Time Scale Offset Voltage Scale Graph TOOLS menu Increase Voltage Scale Increase Offset Voltage Decrease Offset Scale Decrease Voltage Scale Close graph button Instrumentation GDD Inc. 2017-12-07...
  • Page 51 3. Select offset voltage scale. 4. Select time scale. 5. Select display channel Instrumentation GDD Inc. 2017-12-07...
  • Page 52 This option should be used after one signal period (8 sec for a 2 sec time base). 1. Select Tools | Auto Correction 8.3.3.1.2 Restore The RESTORE option is used to reset the settings to default. 1. Select Tools | Restore Instrumentation GDD Inc. 2017-12-07...
  • Page 53 8.3.3.1.3 PAUSE/GO The PAUSE/GO option is used to pause or play the signal. Select Tools | Pause or Tools | Go Instrumentation GDD Inc. 2017-12-07...

  • Page 54: Contact And Noise

    *This option should be used before your transmitter sends current. If the transmitter sends current, the Vp signal will be displayed for each active channel. 1. Select Tools | Show | Show Noise 2. The following screen appears. Transmitter is not sending current Transmitter is sending current Instrumentation GDD Inc. 2017-12-07...

  • Page 55: Vp And Cycle

    • Red dots indicate that the GRx2 is not synchronized. • Green dots indicate that the GRx2 is synchronized. • If the GRx2 is synchronized and the green dots are not moving in the same direction, check the electrodes position on the GRx2 front panel.

  • Page 56: Show M And Errm

    Steps 14 to 16 of Section 5 of this Manual must be done before using this feature. The Show M and errM option is used to display the chargeability and the error in chargeability for each channel. 1. Select Tools | Show | M and errM 2. The following screen appears. Instrumentation GDD Inc. 2017-12-07...

  • Page 57: Decay Curve

    Steps 14 to 16 of Section 5 of this Manual must be done before using this feature. The Decay Curve option is used to display the decay graph of a selected channel. 1. Select Tools | Show | Show Decay 2. The following screen appears. 3. Select the displayed channel. Instrumentation GDD Inc. 2017-12-07...

  • Page 58: Show Windows

    Steps 14 to 16 of Section 5 of this Manual must be done before using this feature. The Show Windows option is used to display the windows chargeability of each channel. 1. Select Tools | Show | Show Windows (1-8 ch) 2. The following screen appears. Channel number Window number Chargeability value Instrumentation GDD Inc. 2017-12-07...

  • Page 59: Show Sp

    Steps 14 to 16 of Section 5 of this Manual must be done before using this feature. The SHOW SP option is used to display the self potential (SP) in mV of each channel. 1. Select Tools | Show | Show SP 2. The following screen appears. Self potential Channel number value Instrumentation GDD Inc. 2017-12-07...

  • Page 60: Raw Data Option

    Connect an external antenna (SMA) to the GPS connector of the GRx2 receiver for more efficiency. After turning on the GRx2 receiver, it can take up to 2 or 3 minutes for the GPS receiver to track and synchronize with a satellite.
  • Page 61 The GPS timestamps will appear in the .gps file (see Section 8.5.5 to create a .gps file). The data in this file is the same than that of the .gdd file except for the GPS timestamp (the time in the .gdd file comes from the PDA).
  • Page 62 During the acquisition process, the GPS status is available by selecting Tools | Raw Data | Check GPS: GPS well synchronized GPS signal lost for less No GPS signal from the beginning than 5 hours or lost for more than 5 hours Instrumentation GDD Inc. 2017-12-07...

  • Page 63: Start Recording (Raw Data)

    If you see No GPS Time, either the internal GPS module cannot receive any data from a satellite, or your receiver does not have this option. 3. To begin the data acquisition, select Tools | Raw Data | Start recording. Instrumentation GDD Inc. 2017-12-07...
  • Page 64 Tools | Raw data | Stop recording. The extension of the file created with your raw data is ‘.bdf’. This binary format file can be imported and visualized using GDD's IP Post-Processing software. Instrumentation GDD Inc. 2017-12-07...

  • Page 65: Memory Option

    PDA. The following window will appear. The number in the Reading Number: field is always the Memory number of the latest reading taken. Enter the number of the reading you want to see. Click on CONFIRM. Instrumentation GDD Inc. 2017-12-07...
  • Page 66 Keep in mind that there is no indication of which reading is monitored on the PDA display. At this point, it is possible to use the show menu to display some graphics or values of the channels. Instrumentation GDD Inc. 2017-12-07...

  • Page 67: History

    The History option is used to display all the data accumulated in the memory. You will have to use the scroll bar to see all the information available. Click Next to go to the next page. The three following slides show all the information displayed by the history. Instrumentation GDD Inc. 2017-12-07...

  • Page 68: Back Mem

    8.5.3 Back Mem The Back Mem option is used to clear the last readings of the memory one by one. 1. Select Tools | Memory | Back Mem 2. Click Yes to clear the last readings. Instrumentation GDD Inc. 2017-12-07...

  • Page 69: Clear Mem

    The Clear Mem option is used to clear all the readings of the memory. 1. Select Tools | Memory | Clear Mem 2. Click Yes to confirm the operation. 3. Enter 9999 in the text box and click CONFIRM to clear all the readings of the memory. Instrumentation GDD Inc. 2017-12-07...
  • Page 70 4. A message will follow to confirm your operation. Instrumentation GDD Inc. 2017-12-07...

  • Page 71: Save File

    1. Select Tools | Memory | Save File 2. Select the output file format available according to your electrode configuration (only one output file format could be available). A GDD Generic file is always created even if you choose another format.
  • Page 72 The .mem file, as the .gdd file, is automatically created by the system. The .mem file has a specific format required to be used with the new GDD IP Post Process software. Contact GDD for more information about this new software.

  • Page 73: About Option

    8.6 About option The About option is used to display the software version number. 1. Select Tools | About 2. The following screen appears. *See Section 8.2.4 for more information about Battery Type. Instrumentation GDD Inc. 2017-12-07...

  • Page 74: Transferring Data

    PDA on Windows 10.pdf” document located on the CD-ROM/USB Stick if your experience problems using Windows 10. Install ActiveSync if you run Windows XP or earlier. All three software are available on the CD/USB Stick supplied by GDD. Another way of transferring data between your Allegro and your PC is to set the PDA device as a USB connection.

  • Page 75: Connecting The Archer Field Pc To A Desktop Pc

    Field PC to a desktop PC 1. Turn the PDA ON 2. Connect the USB cable between the Archer Field PC and your desktop computer. 3. The desktop ActiveSync (or Windows Mobile Device Center) icon is now green. Instrumentation GDD Inc. 2017-12-07...

  • Page 76: Transferring File(S) From The Archer Field Pc To A Desktop Pc

    9.1.3 Transferring file(s) from the Archer Field PC to a desktop PC 1. Double click on the My Computer icon on your desktop PC. 2. Double click on the Mobile Device's icon. 3. Double click on the Main folder icon. Instrumentation GDD Inc. 2017-12-07...
  • Page 77 5. Use the drag and drop or cut, copy and paste functions to move file(s) between your Archer and your desktop PC. The data file is named: File_Name.gdd The GDD binary file is named: File_Name.mem If created, the fullwave file is named: File_Name.fullwave 6. Open the saved files with Notepad or Excel. Instrumentation GDD Inc.

  • Page 78: Windows Mobile Device Center

    1. Once Windows Mobile Device Center 32 or 64 bits is installed, click the Windows Start Menu icon and then click All Programs to display all installed programs. Click Windows mobile Device Center to launch the application. 2. Under Mobile Device Settings option, click on Connection settings. Instrumentation GDD Inc. 2017-12-07...

  • Page 79: Establishing Connection With A Desktop Pc

    1. Connect the micro USB cable between the Archer and the desktop PC 2. Turn the PDA ON. 1. application will connect with the PDA. 2. A small PCLink icon appears on the Allegro title bar. Instrumentation GDD Inc. 2017-12-07...

  • Page 80: Transferring File(S) From The Archer To A Desktop Pc

    9.2.3 Transferring file(s) from the Archer to a desktop PC 1. From the Windows Mobile Device Center, click Connect without setting up your device. Click Browse the content of your device under the File Management section. Instrumentation GDD Inc. 2017-12-07...
  • Page 81 3. Use the drag and drop; or cut, copy and paste functions to move file(s) from your Archer to your desktop PC. The GDD Generic data file is named: File_Name.gdd The GDD binary file is named: File_Name.mem If created, the fullwave file is named: File_Name.fullwave * See Section 8.5.5 (SAVE FILE) for more information about alternate output...

  • Page 82: Usb Connection

    2. Go in the ''connections'' folder and then select the ''USB to PC option''. 3. Select ''SD Card - Use as external drive (Mass Storage)'' 4. The Archer can now be accessed from the Windows File Explorer. Instrumentation GDD Inc. 2017-12-07...
  • Page 83 Instrumentation GDD Inc. 2017-12-07...

  • Page 84: Bluetooth Configuration

    1. Make sure that the Bluetooth is on. If the Bluetooth icon in the Dashboard of the Archer Field PC is gray, click on the icon to enable it. Click on the Bluetooth icon in the Title bar. Click on Add new device. Instrumentation GDD Inc. 2017-12-07...
  • Page 85 The program searches for Bluetooth Devices. This step may take a few seconds. Select the GRx2’s name (RxXXXX) and click on Next. Enter the passcode 1234 and click Next. Open the virtual keyboard or use the numeric keypad of the Archer Field PC.
  • Page 86 7. This message may appear for a few seconds. Click on Advanced or wait until it disappears and click on your GRx2 name. 8. Check Serial Port and click on Save. Select COM Ports. Instrumentation GDD Inc. 2017-12-07...
  • Page 87 10. Click on New Outgoing Port. 11. Select your GRx2’s name and click on Next. 12. Open the Port menu. Instrumentation GDD Inc. 2017-12-07...
  • Page 88 13. Select COM9 and click Finish. 14. The name of your GRx2 receiver should appear with the COM9 tag. Click on the OK button to close the window. Instrumentation GDD Inc. 2017-12-07...

  • Page 89: Gdd Rx Software Update

    11 GDD Rx software update 1. Connect the USB cable between the Archer Field PC and your desktop computer. 2. Double click on the My Computer icon on your PC's desktop. 3. Double click on the Mobile Device icon. 4. Double click on the Main folder icon.
  • Page 90 6. The GDD Rx program files are located in the GDD folder. 7. Rename the old version of the folder to keep a backup on your Archer Field PC. Right click on the GDD folder and select Rename. Instrumentation GDD Inc.
  • Page 91 9. Right click on the Program Files window and create a new GDD folder. 10. Use the drag and drop or the copy and paste functions to move the new GDD Rx software files from your computer to the GDD folder of your Archer Field PC.

  • Page 92: Troubleshooting

    The receiver is not ON when the On-Off switch is at ‘On’. ✓ Answer: ▪ In Cable mode, the receiver will only be ON when the GDD Rx program is active on the pocket ▪ If the receiver’s battery power rating is below the critical threshold, the receiver will not turn on.
  • Page 93 ➢ Problem: The message: ‘GDD Rx – No Receiver’ is shown in the program bar of the GDD Rx program. It stays on the bar even if the Archer Field PC is connected to the receiver. ✓ Answer: ▪ Check that the receiver’s On-Off switch is at On and that the LED is on.
  • Page 94 ▪ Make sure that the Cable / Wireless switch is on Wireless position and that the receiver is turned on. ▪ Look at the Bluetooth icon in the Dashboard: If it is gray, click on the icon to enable it. Try to start the SCIP software in Bluetooth mode again. Instrumentation GDD Inc. 2017-12-07...
  • Page 95 ▪ Reset your Archer Field PC by pressing and holding the Power button. The following message appears. Select Reset. ➢ Problem: The message “Battery Error” appears on the main screen of the GDD Rx program on the Archer PDA. ✓ Answer: ▪...
  • Page 96 Duty Cycle of the transmitter. Check if the signal (Vp > 2) of the trigger channel is high enough. Otherwise, try to synchronize with another channel. You should select the channel that receives the higher signal as the trigger channel. Instrumentation GDD Inc. 2017-12-07...
  • Page 97 We would recommend using this tool to generate the fullwave files instead of doing it on the PDA. It will speed up the export process. You will find the software and the instructions on the CD-ROM/USB stick provided by GDD. Or contact GDD technical support for more information.

  • Page 98: Technical Help

    Cell phone: +1 (418) 570-3408 Any GDD IP Receiver that breaks down while under warranty or service will be replaced free of charge upon request for the duration of repairs, except for shipping fees. This service is subject to instrument availability but we have been able to honour this commitment up to now.

  • Page 99: Specifications

    Up to 1.5 MΩ Signal waveform: Time domain (ON+, OFF, ON-, OFF) Time base: 0.5, 1, 2, 4 , 8 and 16 seconds Input impedance: 5 GΩ at 0.125 Hz and 130 MΩ at 7 Hz Instrumentation GDD Inc. 2017-12-07...
  • Page 100 20 programmable chargeability windows One 24 bit A/D converter per channel Internal test generator (Self-test mode) For more details about Archer rugged field PC specifications, refer to the Archer manual included in the CD provided by GDD. Instrumentation GDD Inc. 2017-12-07...

  • Page 101: Annex 1 - Geometrical Parameters

    Tx1: Transmitter first electrode position Tx2: Transmitter second electrode position Rx: Receiver first electrode position Sep: Separation between two receiver electrodes Note: For all electrode arrays, the Tx line and the RX line(s) can be different. Instrumentation GDD Inc. 2017-12-07...
  • Page 102 Instrumentation GDD Inc. 2017-12-07...
  • Page 103 Instrumentation GDD Inc. 2017-12-07...
  • Page 104 The electrodes C1 has to be set far from the other electrodes, usually 5 times the maximum distance between C2 and Pref. The electrodes C1 and Pref have to be set far from C2 and P1, usually 10 times the maximum distance between C2 and P1. Instrumentation GDD Inc. 2017-12-07...
  • Page 105 The electrodes C1 and C2 are fixed. The electrode P is moved parallel to C inside a zone located in the central part of C1, C2. The electrodes C1, Pref, P1 and C2 are equidistant. The electrodes Pref and P1 are located at the middle point of electrodes C1 and C2. Instrumentation GDD Inc. 2017-12-07...

  • Page 106: Annex 2 - Field Survey Setup

    Annex 2 – Field survey setup Survey setup Line information This survey will consist of 11 lines, each separated by 100m. Each line is 1.3 km long. The examples below will begin at position 3300N-3900E. Instrumentation GDD Inc. 2017-12-07...
  • Page 107 Pole-Pole For this pole-pole setup, 8 electrodes of the GDD-Rx will be used. 1) Select Pole-Pole in the setup page. Instrumentation GDD Inc. 2017-12-07...
  • Page 108 3) If all the values are correct, click the Ok button to continue and take a reading. If something is incorrect, you can modify it on this page. 4) When the reading is done, click the NEXT STN button to increment the positions. Instrumentation GDD Inc. 2017-12-07...
  • Page 109 Pole-Dipole (1/32) For this pole-dipole setup, 8 electrodes of the GDD-Rx will be used. 1) Select Pole-Dipole(1/32) in the setup page. The Pole-Dipole (2/16) and Pole-Dipole (4/8) options are explained in the 3D survey section at the end of this document.
  • Page 110 3) If all the values are correct, click the Ok button to continue and take a reading. If something is incorrect, you can modify it on this page. 4) When the reading is done, click the NEXT STN button to increment the positions. Instrumentation GDD Inc. 2017-12-07...
  • Page 111 Dipole-Dipole (1/32) For this dipole-dipole setup, 8 electrodes of the GDD-Rx will be used. 1) Select Dipole-Dipole (1/32) in the setup page. Instrumentation GDD Inc. 2017-12-07...
  • Page 112 3) If all the values are correct, click the Ok button to continue and take a reading. If something is incorrect, you can modify it on this page. 4) When the reading is done, click the NEXT STN button to increment the positions. Instrumentation GDD Inc. 2017-12-07...
  • Page 113 Gradient For this Gradient setup, 8 electrodes of the GDD-Rx will be used. 1) Select Gradient in the setup page. Instrumentation GDD Inc. 2017-12-07...
  • Page 114 4) When the reading is done, make sure that the Tx box is unchecked, click the NEXT STN button to increment the positions, only the Receiver electrodes position will change. 5) Your next setup on the field should be like this. Instrumentation GDD Inc. 2017-12-07...
  • Page 115 Wenner A Wenner setup uses only two electrodes, the Reference R1 and the electrode 1 of the GDD Rx. Instrumentation GDD Inc. 2017-12-07...
  • Page 116 4) For a Wenner survey, you will have to manually enter the parameters for each reading. To access the Position page, click the Tools button and select the Config option in the pop-up menu. Instrumentation GDD Inc. 2017-12-07...
  • Page 117 Schlumberger A Schlumberger setup uses only the Reference R1 and the electrode 1 of the GDD Rx. 1) Select Schlumberger in the setup page. Instrumentation GDD Inc. 2017-12-07...
  • Page 118 4) For a Schlumberger survey, you will have to manually enter the parameters for each reading. To access the Position page, click the Tools button and select the Config option in the pop-up menu. Instrumentation GDD Inc. 2017-12-07...
  • Page 119 3D Survey Instrumentation GDD Inc. 2017-12-07...
  • Page 120 As shown on the images on the previous page, this setup is for 2 lines of 16 dipoles each using a GDD Rx-32. For the reference pins, R1 and R3 will be used; R2 and R4 will not be used since this is a 2 lines setup.
  • Page 121 4) When readings are done and stored, click the Start button. Click the NEXT STN button and only the Tx2 station will be incremented by 100 since it was entered as the Tx spacing. Instrumentation GDD Inc. 2017-12-07...
  • Page 122 Move St.: TX: to 50. 6) Continue the survey. When Tx2 station position is 1200, you have to change the spacing back to 100. 7) When the line is completed press NEXT LINE to increment the LTx. Instrumentation GDD Inc. 2017-12-07...
  • Page 123 8) When the line is done, change the Move ST.: TX: to -100 or the Tx2 position to 0 depending on where you are starting the next line. Instrumentation GDD Inc. 2017-12-07...
  • Page 124 Instead of using a relative position system (the starting position being 0,0), you can enter GPS position in meters in the Line TX, Line RX, Tx1, Tx2 and Station Rx cases. You can enter any number between -9999999 and 9999999. Next Station Next Line Instrumentation GDD Inc. 2017-12-07...

  • Page 125: Annex 3 - Example Dump File

    • Each line in section 4 has a fix number of entries. If less than 20 windows are defined for a selected entry, the unused columns will be padded with 999.99 • The example file is truncated on the right side omitting column M02 to M20 Instrumentation GDD Inc. 2017-12-07...
  • Page 126 Transmitter timing in ms Stack: Number of stacks Duty Cycle in % M01 – M20: Windows of chargeability ** Date and Time are those of the PDA for the .gdd file and GPS time for the .gps file. Instrumentation GDD Inc. 2017-12-07...

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