| Customization: | Available |
|---|---|
| Accuracy: | Geophysical Resistivity Meter Water Detector |
| Horizontal Line: | Geophysical Resistivity Meter Water Detector |
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The WDJD-3A Multi-Function Digital DC Resistivity/IP Meter is a cutting-edge geophysical instrument designed for high-precision subsurface investigations. Combining resistivity and induced polarization (IP) measurement capabilities, this device is widely used in mineral exploration, groundwater detection, engineering geology, and geothermal prospecting. Its all-in-one design, portability, and advanced signal processing technologies make it a preferred choice for professionals in geophysical surveys.
The WDJD-3A employs multistage wave filtration and signal enhancement technologies, ensuring reliable data even in environments with strong industrial interference. Key specifications include:
| Parameter | Specification |
|---|---|
| Voltage Channel | ±6V, precision: ±5‰ ±1LSB (Vp≥10mV); ±1% ±1LSB (Vp<10mV) |
| Current Channel | 5A, precision: ±5‰ ±1LSB (Ip≥10mA); ±1% ±1LSB (Ip<10mA) |
| Input Impedance | ≥50MΩ, minimizing signal distortion |
| Noise Suppression | ≥80dB for 50Hz industrial interference (common/differential mode) |
| SP Compensation | ±1V range, automatic drift correction |
Bold Innovation: The system automatically compensates for self-potential (SP), electrode polarization, and drift, reducing manual calibration efforts.
When paired with the WDZJ-4 multiplex electrode switcher, the WDJD-3A supports 2D resistivity imaging for detailed subsurface mapping. Highlights include:
18 electrode array configurations, including dipole-dipole, Wenner, and Schlumberger.
Extendable cross-section scanning-unlimited survey length without additional electrodes.
High data capacity: Stores 43,680 data points per section, ideal for large-scale surveys.
Bold Advantage: Roll-along scanning allows continuous profiling, significantly improving fieldwork efficiency.
The device operates in three primary modes:
General Resistivity Survey - Measures apparent resistivity (ρs), SP, voltage (V), and current (I).
Induced Polarization (IP) Survey - Captures chargeability (M1-M7), half-decay time (TH), and decay rate (D).
Multi-Electrode Imaging - Enables 2D/3D subsurface modeling for advanced geological analysis.
Bold Flexibility: Users can switch between modes seamlessly, adapting to mineral exploration, hydrology, or civil engineering needs.
| Parameter | General Survey Mode | 2D Imaging Mode (WDZJ-4) |
|---|---|---|
| Max Transmitting Power | 4500W | 1125W (limited by switcher) |
| Max Output Voltage | 900V (1800V peak-to-peak) | 450V DC |
| Max Output Current | 5A | 2.5A DC |
| Pulse Width | 1-60s (adjustable) | 1-60s (adjustable) |
Bold Reliability: Built-in protections against over-voltage, over-current, and AB open-circuit failures ensure operational safety.
Internal Memory:
3,500 datasets for resistivity/SP surveys.
2,500 datasets for IP surveys.
43,680 datasets for 2D imaging.
RS-232C Port: Enables data transfer to PCs for inversion/interpretation using compatible software (e.g., RC2004).
Bold Convenience: Power-failure protection prevents data loss during unexpected shutdowns.
Electrode Grounding Check: The Earth Resistance socket allows real-time testing of electrode contact quality (<150kΩ recommended).
Battery Monitoring: Alerts users if voltage drops below 9.6V, preventing incomplete surveys.
Parameter Setup:
Select electrode array (e.g., 4P-VES for vertical sounding).
Input transmitting duration (1-60s) and stacking times (for noise reduction).
Automated Measurements:
SP, ρs, V, I captured in resistivity mode.
M1-M7, TH, D added in IP mode.
Data Storage: Assign Line/Point IDs for organized retrieval.
Bold Efficiency: Schedule ID system stores 100 electrode spacing presets, eliminating repetitive manual entry.
On-Screen Curve Plotting: View logarithmic resistivity curves or IP decay profiles.
Data Export: Transfer via RS-232C for advanced software processing.
| Industry | Use Case |
|---|---|
| Mineral Exploration | Locate metal/non-metal deposits via resistivity/IP anomalies. |
| Hydrology | Map aquifers and detect groundwater contamination. |
| Civil Engineering | Assess dam stability, bridge foundations, and levee integrity. |
| Geothermal Prospecting | Identify heat reservoirs through subsurface conductivity mapping. |
Bold Versatility: The WDJD-3A's multi-electrode imaging is invaluable for urban geophysical surveys, where space constraints demand compact, high-resolution tools.
Robust Design: Waterproof and dustproof (IP54 equivalent), operable in -10°C to 50°C.
Battery System: 8× size-D cells (or Ni-Cd equivalents) for extended field use.
Maintenance Tips:
Clean with a damp cloth (no solvents).
Remove batteries during long-term storage.
Bold Longevity: The CMOS integrated circuitry ensures low power consumption (≤55mA), extending battery life.
DC Resistivity Meter IP Meter Geophysical Equipment
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