Geophysical Resistivity & IP Instrument for Groundwater detector, Underground Water Finder
                                                                                         


 

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/3D resistivity imaging
3. 2D induced polarization imaging

System composition:
Whole system takes WDA-1 as control unit, can accomplish centralized 2D multi-electrode resistivity survey with WDZJ-4 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.
                                                                        


WGMD-9 system configuration table:
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: -10ºC~+50ºC,95%RH
2. storge temperature: -20ºC~+60ºC
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. Windos 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.

Technical specification (Distributed system):
    WDA-1 control and survey unit    
Same detail as above.
 
    Distributed 2D/3D Multi-electrode resistivity & 2D induced polarization switchable cable (optional)
1. Wide-temperature polyurethane cover, diameter: Φ8mm
2. Channel quantity: 10 channels/pc
3. Channel interval: 1-10m (can be customized between range)
4. Switch dimension: Φ30mm×100mm
5. Maximum working voltage: 800V
5. Maximum working current: 3A
6. Cable insulativity: ≥1000MΩ/1000V between A,B pole supply core and A,B core between other low voltage cores; ≥500MΩ/500V between low voltage cores
7. Working temperature: -20ºC~+70ºC
 
    Distributed 2D/3D Multi-electrode resistivity & 2D induced polarization survey electrode (optional)

1. Steel electrode: Φ10mm×280mm, with steel connecting spring .
2. Quantity: acquired by customer.

Multiplex Electrode (60120 channels) Resistivity Meter Tomograph  Resistivity Imaging, Ert Electric Resistance Tomograph for Underground Water Finder