2D Geoelectric Electrical Topography System Resistivity/IP Meter With Electrodes
2D Geoelectric Electrical Topography System Resistivity/IP Meter With Resistivity Cables and Electrodes
Geoelectric electrical topography is the branch of Geophysics that deals with the behavior of rocks and sediments in relation to electric current. That is, they are those that study the response of the terrain when direct electric currents (DC) propagate through them. The physical parameter that is controlled is resistivity and the final interpretation is made based on the geological characteristics of the area in which geoelectric prospecting methods are applied:
ELECTRICAL TOMOGRAPHY Equipment is a direct current method system whose purpose is to determine the variation of the electrical resistivity of the subsoil as a function of depth and along a profile, that is, in 2 dimensions (2-D).
In the Dipole-Dipole the four electrodes move in relation to a center but at the same time they also move laterally whose objective is to see variations in resistivity in 2-D (X and Z).
Arrangements: Dipole-Dipole, Pole-Dipole, Pole-Pole, Wenner, Wenner-Schlumberger, Edge Gradient, Strong Gradient, among others.
Widely Applications: Environmental engineering, prospecting for mineral resources, geotechnics, geological characterization, civil protection for the determination of fractures, geological faults, detection of cavities and facies changes and archaeology.
Main Application
- Mineral prospecting in geological surveys - identify potential mineral deposits.
- Groundwater exploration - locate and assess water resources.
- Environmental investigations - identify contamination and remediation sites.
- Engineering projects - determine foundation stability and soil mechanics.
- Archaeological studies - detect buried structures and artifacts.
- Civil engineering - determine soil composition and geotechnical properties.
WDA-1/WDA-1A Main Frame (Standard)
| Maximum transmitting powe | 7200W |
| Maximum supply voltage | 1200V (with WDZJ-3, no more than 450V) |
| Maximum supply current | 6A (with WDZJ-3, no more than 2.5A) |
| 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 If0.1mV≤Vp＜5mV, accuracy is ±1% ±1LSB. |
| 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 |
| Dimension | 270mmx246mmx123mm |
| Internal power source | maximum voltage 96V (two notches, 48V and 96V); maximum current is 0.7A. |
| 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. | |
Standard configuration list about 2D Geoelectric electrical topography System
| No. | Description | Quantity |
| 1 | WDA-1 multi-function digital DC resistivity/IP Meter | 1set |
| 2 | WDZJ-4 Multiplex Electrode Switcher | 1pc |
| 3 | Special communication cable for WDJD-4 and WDZJ-4 | 1pc |
| 4 | Connecting wires for A, B, M, N connecting terminals of WDJD-4 and WDZJ-4 | 4pcs |
| 5 | 30 take-outs multi-electrode cable | up to order |
| 6 | Iron electrode | up to order |
| 7 | Solid non-polarized electrode | 2pc |
| 8 | Knapsack | 1pc |
| 9 | USB cable | 1pc |
| 10 | U disc with user’s manual | 1pc |
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