WERT-9A/9B/9C 2D/3D Electrical Resistivity/IP Imaging System

Wirings:

• 2D Resistivity Imaging		• 3D Resistivity Imaging

• 2D Resistivity/Induced Polarization(IP) Imaging

Arrays:

• Wenner Alpha	• Wenner Beta	• Wenner Gamma
• Dipole-dipole	• Schlumberger	• 3P-direct
• 3P-reverse	• 2P AM	• 3P A-MN
• 3P AB-M	• MN-B	• SP-M
• SP-MN	• Combined profiling	• Corss-hole dipole
• Charging M	• Charging MN	• User-defined

Main features:

• Portability and flexibility: the transmitting unit and the receiving unit are designed in one device, small and lightweight. The 200V internal battery of WDA-1B mainframe can conduct multi-electrode imaging in wide variety of environments.

• Unique and open measuring process control. User-defined power-on time and power-off time controls measuring process. The main frame can also monitor variation of electrode potential automatically. If the parameter exceeds the user-defined over-variation limit, it stops measuring, and wait to measure again until it becomes stable. Thanks to this function, WDA-1/WDA-1B system can ensure accurate measured result even in harsh environment.

• WDA-1/WDA-1B is designed with two cable sockets which enable cross-hole electrode array configuration works without switching control unit, and thus makes the measuring process much simpler and easier.

• Multiple functions: voltage and current range and small signal accuracy are allowed to increase dramatically, which makes it suitable to work with rock sampling tester, high-power IP receiver, general electrical method instrument, IP instrument, water finder, 2D and 3D multi-electrode electrical method instrument, etc.

• Measuring various parameters, wide application: it is able to acquire data of voltage (VP), current (IP), apparent resistivity (R0), Self-Potential (SP), apparent polarizability (M~M7), metal factor (G1~G7), half decay time (TH), deviation (r), induce polarization ratio (J), etc.


ID sounding data & curve		2D resistivity imaging interface		2D data curve		3D imaging survey interface

• High power supply, wide current range, high accuracy: maximum power reaches 9000W (1500V×6A), voltage input is 64Vp-p, small signal measurement precision is high (voltage is less than 0.1mV and current is less than 0.1mA with ±1% measurement precision), both of which make WDA-1/WDA-1B main frame an ideal device for regions of high resistivity and to achieve better measured results.

• On its panel there is an “B(∞)” port for pole-pole and dipole-pole electrode array. As to dipole-pole array configuration, ResA, ResB, and Res can be measured automatically with high efficiency and fewer errors.

• 16 kinds of electrode arrays of multi-electrode system: In addition to the 10 electrode arrays of general electrical resistivity survey system, there are 16 electrode arrays for multi-electrode imaging, namely, Wenner Alpha array (WENNER α), Wenner Beta array (WENNER β), Wenner Gamma array (WENNER γ), Three-pole direct array (δA ARRAY), Three-pole reverse array (δB ARRAY), Wenner Alpha 2 array (SCHLMBG), Self-Potential M array (SP-M), Self-Potential MN array (SP-MN), Charging M (CHG-M), Charging MN (CHG-MN), Two-pole Roll along array (2P AM), Three-pole Roll along array (3P A-MN and 3P AB-M), Dipole-dipole Roll along array (DIPOLE), MN-B, Cross-Hole Dipole/Equatorial Dipole-dipole array (CR-DIPOLE).

• Extendable system: data sampling and storing are controlled by pocket PC. Data management is easy. Software is flexible to be upgraded and extended (extending data storage capacity and collection software functions, also extend to special multi-electrode electrical instrument).

• Excellent anti-interface performance: integrated with multistage filtration and signal enhancement technologies and suppresser against common mode interference and differential mode interference. Measurement precision is high.

• Automatically achieving SP, drift and electrode compensation (maximum compensation reaches ±10V).

• Receiving unit supports transient over-voltage protection for input voltage; transmitting unit supports over-voltage protection, over-current protection and AB open-circuit protection as well as DC high voltage reverse connection protection.

• Earth resistance check: earth resistance of AB Current electrodes and MN Potential electrode can be inspected at any time.

• Diagnosis program can find the fault or failure quickly and accurately.

• Sealed constitution features waterproof and dust-proof design, long lifetime.

• Flexible option of control: control unit may also be notebook PC to remotely manipulate measurement.

Technical Specifications:

Mainframe (Standard)
Maximum transmitting power	7200W
Maximum supply voltage	1200V
Maximum supply current	6A
Transmitting power pulse width	1~60s, duty cycle is 1:1.
Voltage	±32V (24 bit A/D). If Vp≥5mV, accuracy is ±0.2% ±1LSB. If 0.1mV≤Vp＜5mV, accuracy is ±1% ±1LSB.
Input impedance	>50MΩ
Apparent polarizability accuracy	±1％±1LSB
SP compensation range	±10V
Current	6A (24bit A/D). If Ip≥5mA, accuracy is ±0.2% ±1LSB. If 0.1mA≤Ip<5mA, accuracy is ±1% ±1LSB.
Suppression	for 50Hz industrial frequency interference (common mode and differential mode interference), suppression is more than 80dB.
Power supply	internal 7.4V 4Ah rechargeable battery continuously lasts for 20 hours (or 12V external power supply).
Ports support (transmitting unit)	A, B, M and N connecting ports, DC high voltage input ports and external battery terminals, 2 cable ports, RS-232, Bluetooth.
Working temperature	-10℃~+50℃, 95%RH
Storage temperature	-20℃~+60℃
Weight	≤ 4kg (WDA-1) ≤ 6kg (WDA-1B)
Dimension	270mm * 246mm * 123mm (WDA-1) 340mm * 295mm * 152mm (WDA-1B)
Internal power source (WDA-1B only)	max voltage 200V (four notches, 50V, 100V, 150V and 200V); max current is 0.7A.
Intelligent Cable
Cable	polyurethane coated, outer diameter Φ8mm
Quantity	up to order
Connector (take-out) number	10/sting (ten electrode per string)
Connector (take-out) spacing	5m or 10m (or up to order)
Connector size	Φ30mmx100mm (connector only), Φ39mmx170mm (including rubber head)
Maximum voltage	1000V
Maximum current	4A
Cable insulation	cable between A, B connecting ports and cable between A, B connecting ports and the low voltage connecting port, insulation is more than 1000MΩ/1000V; cable between low voltage connecting ports, insulation is more than 500MΩ/500V
Working temperature	-20°C~+70°C
Stainless Steel Electrode for 2D/3D Resistivity Imaging (Optional)
Stainless steel electrode	Φ10mm x 280mm, with stainless spring
Quantity	up to order

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Note:

In order to ensure the safety of customers, our sales department only keeps the following email addresses:

- Sales@langeoinstrument.com
- Emily.chou@langeoinstrument.com

Other mailboxes are unofficial, please note.

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