Wenner Array Geophysical Exploration Instrument for Hydrological
Investigation
Introduction
Geophysical surveys are an extremely useful geophysical method for
studying the ground conditions to a significant depth and over a
large area. Geophysical survey is utilised in many applications for
subsurface investigations, mineral exploration being one of them.
Geophysical surveys is popular for Hydrogical Investigation, to
study underground water and boreholes. There are various type
geophysical equipment for this use. Such as China WGMD multi
electrode resistivity imaging system.
Electrode arrays of multi-electrode system:
multi-electrode imaging,
Wenner Alpha array (WENNERα)
Wenner Beta array (WENNERβ)
Wenner Gamma array (WENNERγ)
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),
Cross-Hole Dipole/Equatorial Dipole-dipole array (CR-DIPOLE).
Specification
| Receiving part |
| Voltage channel | ±32V(24 bit A/D) |
| Measurement accuracy | Vp≥5mV, ±0.2% ±1 character, 0.1mV≤Vp<5mV, ±1% ±1 character |
| Input impedance | >50MΩ |
| Apparent polarization accuracy | ±1%±1character |
| SP compensation range | ±10V |
| Current channel | 6A(24bit A/D) |
| Measurement accuracy | Ip≥5mA, ±0.2% ±1character, 0.1mA≤Ip≤5mA, ±1% ±1 character |
| As for 50Hz industrial interface(common and different
mode)depression | Better than 80dB |
| Transmitter part |
| Maximum power | 7200W |
| Maximum supply voltage | ±1200V |
| Maximum supply current | ±6A |
| Supply current width | 1~60s, duty rate 1:1 |
| Others |
| Working temperature | -10℃~+50℃, 95%RH |
| Storage temperature | -20℃~+60℃ |
| Power supply | Built-in 7.4V4Ah(or outside 12V), lasting for 20h |
| Main unit port | A, B, M, N, DC high voltage, outside battery, 2 cable port, RS-232,
blue tooth |
| Weight | ≤4kg |
| Dimension | 270mm*246mm*123mm |
| Pocket PC |
| Windows mobile 5.0 system, 624MHz, 640*480 true color, 128MB Flash
ROM /64MB SDRAM, 512MB CF card, blue-tooth, infrared, serial port,
2 rechargeable batteries, with Word, Excel. |
