Induced Polarization Receivers

8, 16, 24, 32 channels
Model GRx8-32 with PDA

DESCRIPTION

The GDD IP Receiver is a compact and low consumption unit designed for high productivity Resistivity and Induced Polarization surveys. Its high ruggedness allows it to work under any field conditions. It can be configured in pole or dipole reception (dipole-dipole, pole-dipole and pole-pole time domain IP surveys). GDD IP Receiver uses a PDA computer to process acquisition data. A VGA display allows visualizing the results while standing up. The operating system is Windows Mobile (Mobile CE.Net 4 for Allegro CX and Mobile 6 for Allegro MX). Updates for the GDD GRx 8-32 software can be downloaded via Internet and installed on the PDA.

IP Receiver - Model GRx-8-32

"Field users have reported that the GDD IP Receiver provided more reliable
readings than any other time domain IP receiver and it reads a few additional
dipoles. "

CHARACTERISTICS

• Reception poles/dipoles:
  8 poles or 8 dipoles, with possibility to upgrade to 16 poles or 16 dipoles.
  
  
• Programmable windows: The GRx8-32 offers twenty fully programmable windows for a higher flexibility in the definition of the IP decay curve.
  
  
• User modes available: Arithmetic, logarithmic, semi-logarithmic, Cole, IPR-12 and user defined.
  
  
• IP display:Chargeability values, Resistivity values and IP decay curves can be displayed in real time. The GRx8-32 can be used for monitoring the noise level and checking the primary voltage waveform.
  
  
• Data storage: A 4 Go (or more) Compact Flash memory card is used to store the readings. Each reading includes the full set of parameters characterizing the measurements for all channels; the full wave signal for post-treatment processing. The data is stored in flash type memory not requiring any battery power for safekeeping.

EQUIPEMENT The following equipment is shipped: 1 IP receiver module 1 IP receiver battery charger 1 PDA 1 RS-232 cable 1 Operation manual
	The control panel is reliable and easy to use Click on the picture to enlarge it

Components included with
GDD IP Receiver GRx8-32
Click on the picture to have full list of items included

FEATURES

• 8 channels expandable to 16, 24 or 32
  
• Reads up to 32 ch. simultaneously in poles or dipoles
  
• PDA menu-driven software / simple to use
  
• 32 channels configuration allows 3D Survey:
  4 lines X 8 channels - 2 lines X 16 channels or
  1 line X 32 channels
  
• Link to a PDA by Bluetooth or RS-232 port
  
• Real-time data and automatic data stacking (Full Wave)
  
• Screen-graphics: decay curves, resistivity, chargeability
  
• Automatic SP compensation and gain setting
  
• 20 programmable chargeability windows
  
• Survey capabilities: Resistivity and Time domain IP
  
• One 24 bit A/D converter per channel
  
• Gain from 1 to 1,000,000,000 (10⁹)
  
• Shock resistant, portable and environmentally sealed
  

SPECIFICATIONS

• Number of channels: 8, 16, 24 or 32
  
• Survey capabilities: Resistivity and Time domain IP
  
• Twenty chargeability windows: Arithmetic, logarithmic, semi-logarithmic, Cole-Cole, IPR-12 and user defined.
  
• Synchronization: Automatic and re-synchronization process on primary voltage signals
  
• Noise reduction: Automatic stacking number
  
• Computation: Apparent resistivity, chargeability, standard deviation, and % of symetrical Vp
  
• Size: 41 X 33 X 18 cm (16 X 13 X 7 in)
  
• Weight: Weight (32 channels): 8.9 kg (19.6 lb) and PDA 1.3 kg (2.9 lb)
  
• Enclosure: Heavy-duty Pelican case, environmentally sealed
  
• Serial ports: RS-232 port and Bluetooth to communicate with a PDA.
  
• Rx 8-32 Temperature range: -45 to +60°C (-49 to +140°F)
  
• Humidity range: Waterproof
  

POWER

• Power: 12 V rechargeable. Over 12 hours nominal operation at 20°C with 8 channel unit; additional batteries mounted internally or external battery input for extended operation in cold climates.

ELECTRICAL CHARACTERISTICS

• Ground Resistance: Up to 1.6 MΩ
• Signal waveform: Time domain (ON+, OFF, ON-, OFF)
  
• Time base: 0.5, 1, 2, 4 and 8 seconds
  
• Input impedance: 10⁴GΩ
  
• Primary voltage: ±10 uV to ±15 V for any channel
  
• Maximum input voltage: ±40 V for any channel, protection up to ±320 V
  
• Input: True differential for common-mode rejection in dipole configuration
  
• Voltage measurement: Resolution 1 µV, Accuracy 0.5%
  
• Chargeability measurement: Resolution 1 µV, Accuracy 0.8%
  
• SP offset adjustment: ± 5 V, automatic compensation through linear drift correction per steps of 150 µV.
• Filter: Eight-pole Bessel low-pass 15 Hz, notch filter 50 Hz and 60 Hz
  

PDA included with GRX8-32 Standard Juniper - Allegro CX mobile PDA PDA: Standard Juniper - Allegro CX mobile PDA ____computer provided with the GDD receiver ____with all accessories. Operating system: Windows CE Comes with Bluetooth and RS-232 Processor: Intel XScale, 400 Mhz Memory: 64 MB or 128 MB Flash, 64 MB RAM Display: 7.2" (183 mm) VGA STN transflective color LCD with backlighting. PDA Temperature range: -20 to +50°C (-4 to +122°F). Using Bluetooth, the PDA can be kept warm by the operator and readings can be taken while standing up.

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Instrumentation GDD Inc.
860 boul. de la Chaudiere, Suite 200
Quebec (Qc)
CANADA
G1X 4B7
Phone: +1 (418) 877-4249 - Fax: +1 (418) 877-4054
www.gddinstrumentation.com
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