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WDJD-4A
GOLD
Product Description
WDJD-4A High Accuracy Multi-Function DC Resistivity Meter for Tungsten Mine Induced Polarization Survey
Product features
1.high precision
Adopting new circuit design,single-chip control, automatic noisereduction, and digital filtering togreatly improve measurementaccuracy and stability.
2.Simple operation
Humanized man-machine interfacebuilt-in formulas for various devicesto directly read VP, IP, SP, RO, M, THand other related parameters.
3.Fully equipped
Ten device types includingquadrupole sounding, intermediategradient, joint profile, five poles, and
three poles.
4.Mass data storage
WDJD-4A can memorize 3500 readings of data for resistivity and SP survey, 2500 readings of data for induced polarization (chargeability) survey and 43680 readings of data for multi-electrode 2D Resistivity Imagin.
Product Testing
Technical Specification
Receiving part | |
Voltage precision | ±24V, ±0.4% ±1LSB, 24 bit A/D |
Input impedance | ≥50MΩ |
Apparent polarizability precision | ±1% ±1LSB |
SP compensation range | ±10V |
Current channel | 6A, ±0.4% ±1LSB, 24 bit A/D |
Resolution | Voltage: 0.1 micro volt, Current: 0.2 micro ampere |
Suppression | ≥80dB for 50Hz industrial frequency(common mode interference or differential mode interference) |
Transmitter part | |
Maximum power | For general Res/IP sounding, 6600W. For mulit-eletrode Res imaging, 1125W, limited by WDZJ-4 switcher For Res cable, 1350W For IP cable, 2400W |
Maximum supply voltage | For general Res/IP sounding, ±1100V(2200V peak to peak) For multi-electrode Res/IP imaging, 450V DC(limited by WDZJ-4 switcher) |
Maximum supply current | For general Res/IP sounding, ±6A For multi-electrode Res imaging, 2.5A DC(limited by WDZJ-4 switcher) |
Pulse width | 1~60s, duty rate 1:1 |
Others | |
Display | 160*160 dot matrix LCD |
Storage | ≤1GB |
Working temperature | -10℃~+50℃, 95% RH |
Storage temperature | -20℃~+60℃ |
Instrument power | Internal 12V 9Ah rechargeable battery, lasts for 30 hours(or 12V external power supply) |
Weight | ≤4.4kg |
Dimension(L*W*H) | 270mm*246mm*175mm |
Working Principle
The working principle of WDJD-4A multifunctional digital DC induced polarization instrument is mainly based on advanced 32-bit single-chip microcomputer technology and 24-bit A/D conversion technology, combined with advanced electronic technologies such as high-power control. The following is a detailed description of its working principle:
Transmitter: WDJD-4A has a powerful transmission power of up to 4500W, which can provide a stable DC current to stimulate the underground medium to generate an electric field. During the measurement process, the transmitter sends current to the underground through the AB power supply electrode to form an artificial electric field.
Receiver: The receiver is responsible for measuring the voltage changes caused by the artificial electric field. It contains high-precision voltage channels and current channels, which can accurately capture and record these tiny changes. The receiver receives signals through the MN measuring electrode, and improves the measurement accuracy through built-in filtering and signal enhancement technology, effectively suppressing external interference.
Data processing: The collected data is quickly processed and analyzed by the 32-bit single-chip microcomputer inside the instrument. The single-chip microcomputer is not only responsible for controlling the entire measurement process, but also performs complex mathematical operations, such as natural potential, drift and electrode polarization compensation, to ensure the accuracy of the measurement results.
Display and storage: The processed data can be displayed intuitively on the instrument's LCD screen, including resistivity, apparent polarizability, natural potential and other parameters. At the same time, the data can also be stored in the instrument's large-capacity memory, supporting power-off protection to ensure that the data will not be lost due to accidental power failure.
Contact us to learn more！！
Output and transmission: WDJD-4A supports data transfer to a computer or other storage device via a USB interface, which is convenient for users to conduct further data analysis and processing.
