Multi-electrode 2D Underground Water Resistivity Imaging system

Application:

1. Water resources, metal and nonmetal mineral resources detection
2. City geophysical exploration, railway and bridge inspection 
3. Hydrology and engineering geology as inspecting dam base and flood protection levee for incipient faults
4. Geothermal prospecting

Function:

1. 1D resistivity sounding
2. 1D induced polarization sounding
3. 2D resistivity imaging

System composition:

Whole system takes WDA-1 as control unit, can accomplish centralized 2D multi-electrode resistivity survey with WDZJ-4/WDZJ-120 multi-electrode converter, centralized multi-electrode survey cable and electrodes; also can accomplish Distributed 2D/3D multi-electrode resistivity survey and 2D multi-electrode Res & IP survey with distributed multi-electrode survey cable and electrodes.

Technical specification (Centralized system):

     WDA-1 control and survey unit
Receiving part
1. voltage channel: ±32V(24 bitA/D)
accuracy: as Vp≥5mV, ±0.2% ±1 character
as 0.1mV≤Vp<5mV, ±1% ±1 character
2. Input impedance: >50MΩ
3. Apparent polarization accuracy: ±1%±1character
4. SP compensation range: ±10V
5. Current channel: 6A(24bitA/D)
measurement accuracy: as Ip≥5mA, ±0.2% ±1character
as 0.1mA≤Ip<5mA, ±1% ±1character
6. As for 50Hz industrial interface(common and different mode)depression is better than 80dB
Transmitter part
1. maximium power: 7200W
2. maximium supply voltage: ±1200V
3. maximium supply current: ±6A
4. supply current width :1~60s, duty rate 1:1
Other
1. working temperature: -10℃~+50℃,95%RH
2. storge temperature: -20℃~+60℃
3. power supply: builtin 7.4V4Ah(or outside 12V), lasting for 20h
4. main unit port: A, B, M, N, DC high voltage, outside battery, 2 cable port, RS-232, blue tooth
5. weight: ≤4kg
6. size : 270mm×246mm×123mm
Pocket PC
1. Windows Mobile 5.0 system, 624MHz, 640×480true color, 128MB Flash ROM / 64MB SDRAM,512MB CF card, blue
tooth, infrared, serial port, 2 rechargeable batteries, with Word, Excl.

   WDZJ-4  Electrode converter

Max electrode connected: 60/unit
Insulation impedance: ≥500MΩ
Max working voltage: 500VDC
Max working current: 2.5ADC
Power supply: Internal 7.4V 4AH rechargeable lithium battery, last for continuously 25 hours work
Working temperature: -10°C~+50°C
Dimension: 340mm×295mm×152mm
Weight: 5.8kg

Centralized 2D Multi-electrode resistivity cable (optional)
1. 32 cores, diameter: Φ6mm.
2. Connectable cable quantity for each converter: 2 pcs (30 channels/pc), can be customized.
3. Channel interval: 5m/10m
4. Maximum working voltage: 450V
5. Maximum working current: 3A
6. Cable insulativity: ≥500MΩ/500V between any two cores.

Centralized 2D Multi-electrode resistivity electrode
1. Copper electrode: Φ12mm×280mm, with connector.
2. Quantity: acquired by customer.

Packing information:

The packing information will be different according to different configuration. The specific dimension can be provided once the configuration is settled.

Any question feel free to contact:

Gold Tao
Mobile phone: +86 15922982462
Tel: +86-23-67624421
Fax: +86-23-62940030
Skype: goldgeo