Geophysical Equipment Vertical Electrical Sounding VES Resistivity Meter For Geotechnical Survey and subsurface geophysical investigation
All resistivity methods can be applied for studying variations of resistivity with depth (depth sounding methods) or for studying lateral changes in resistivity (horizontal profiling methods). The vertical electrical resistivity sounding methods (VES) are depth sounding galvanic methods.
The Vertical Electrical Sounding (VES) has proved very popular with groundwater prospecting and engineering investigations due to simplicity of the techniques. The electrical geophysical survey method is the detection of the surface effects produced by the flow of electric current inside the earth. The electrical techniques have been used in a wide range of geophysical investigations such as mineral exploration, engineering studies, geothermal exploration, archeological investigations, permafrost mapping and geological mapping.
Arrays of geophysical Resistivity Meter:
| No. |
Array |
Remarks |
| 1 |
4P-VES |
Electrical sounding |
| 2 |
3P-VES |
|
| 3 |
4P-PRFL |
Electrical profiling |
| 4 |
3P-PREL |
|
| 5 |
RECTGL |
|
| 6 |
DIPOLE |
|
| 7 |
IP-BUR |
|
| 8 |
Input K |
Any array |
| 9 |
5P-VES |
Electrical sounding |
| 10 |
Com-PRFL |
Electrical profiling |
Geophysical resistivity meter technical:
Technical Specifications
| Receiving unit |
| Voltage channel |
±24V,±0.5% ±1LSB,24bit A/D |
| Max voltage sampling resolution |
0.01μV |
| Input impedance |
≥50MΩ |
| SP compensation range |
±10V |
| Current channel |
3.5A,±0.5% ±1LSB,24 bit A/D |
| Maximum current sampling resolution |
0.02μA |
| Suppression |
≥80dB for 50Hz industrial frequency (common mode interference or differential mode interference). |
| Transmitting unit |
| Max transmitting power |
3500W |
| Max voltage supply |
±1000V(2000Vp-p) |
| Max current |
±3.5A(7Ap-p) |
| Pulse waveform of power supply |
duty cycle is 1:1, bipolar |
| Others |
| Screen |
160 × 160 dot matrix LCD |
| Storage |
≥1GB |
| Instrument power source |
built-in 7.4V4Ah lithium battery(or external 12V power supply), more than 20 hours of continuous work |
| Mainframe interface |
A,B,M,N, DC high voltage, external battery, charger, RS-232 and USB, etc |
| Built-in high-voltage power supply (only WDDS-2B) |
Max current is 300mA, voltage is 50V, 100V, 150V, 200V. |
| Working temperature |
-10ºC~+50ºC, 95 %RH |
| Storage temperature |
-20ºC~+60ºC |
| Weight |
≤ 4.2 Kg (WDDS-2) ≤ 5.5 Kg (WDDS-2B) |
| Dimension (L×W×H) |
270mm X 246mm X 175mm |
Geophysical Equipment Vertical Electrical Sounding VES Resistivity Meter For Geotechnical Survey and subsurface geophysical investigation
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