Product Details
Electrical Resistivity Survey For Groundwater Investigation Induced
Polarization Instrument
The WDJD-3A multi-function digital dc resistivity & ip instrument
has changed the traditional electrical exploration equipment's
large size, heavy weight, and insufficient professional use, making
the instrument more miniaturized, lighter, and supporting
intelligent analysis software, with simple operation and use
Distinguished feature of convenience.
Main Features and Functions
- Simple calculator fulfills calculation of geometric factor and
other calculations on the spot.
- For general resistivity and IP survey function, 8 types of
electrode arrays are available. Electrode distance (namely
“Schedule”) can be inputted or called. Geometric factor K can also
be generated automatically or calculated manually.
- For multi-electrode 2D resistivity imaging function, 18 types of
electrode arrays are available. Extendable cross-section roll-along
scan measurement allows the measuring cross-section to be prolonged
unlimitedly without adding more electrodes. It is suitable for long
cross-section survey and for solving geologic problems under any
condition with low cost and high efficiency.
- Schedule: the schedule can memorize 100 groups of electrode
distances, avoiding repetitive input. Or you just input a schedule
ID and set step to call the corresponding electrode distances.
- Earth resistance inspection: earthing condition can be inspected at
any time.
- Mass data storage: WDJD-3A 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 Imaging.
- All parameter and data are under power-failure protection; and thus
data will not be lost even thought the system shuts down
accidentally.
- RS-232C port enables it to transfer data to computer.
- Diagnostic program finds fault or failure and damaged parts quickly
and accurately.
- Sealed constitution: featuring waterproof and dustproof design,
long life time and so on.
Application
Extensive exploration of detailed surveys and general surveys of
various metallic and non-metallic minerals
Extensive exploration for detailed surveys and general surveys of
groundwater
It is widely used in environmental protection survey, electric
power design, engineering prospecting, geothermal prospecting, coal
mine goaf, geological disaster survey, etc.
Technical Specification
Receiving unit:
Voltage channel | ± 6V |
precision | if Vp≥10mV, ± 5‰ ± 1LSB; if Vp < 10mV, ±1% ± 1LSB. |
Input impedance | ≥50MΩ |
Apparent polarizability precision | ±1% ± 1LSB |
SP compensation range | ±1V |
Current channel | 5 A |
precision | if Ip≥ 10mA, ± 5‰ ± 1 LSB; if Ip < 10 mA, ±1% ± 1 LSB |
Suppression | ≥80dB for 50Hz frequency industrial and electrical interference |
Transmitting unit:
Maximum transmitting power | 4500W (only when conducting general resistivity/IP survey.
Regarding multi-electrode resistivity imaging, maximum transmitting
power is 1125W which is limited by WDZJ-4 switcher) |
Maximum voltage output | 900V (1800V peak to peak, only for general resistivity/IP survey.
Regarding multi-electrode resistivity imaging, maximum transmitting
voltage is 450V DC which is limited by WDZJ-4 switcher) |
Maximum current output | 5A (only for general resistivity/IP survey. Regarding
multi-electrode resistivity imaging, maximum current output is 2.5A
DC which is limited by WDZJ-4 switcher) |
Pulse width | 1~60s, duty ratio 1:1 |
Others:
Working temperature | -10℃~50℃, 95 %RH |
Storage temperature | -20℃~60℃ |
Mainframe power source | eight size-D dry cells (or nickel-cadmium batteries of the same
specification) |
Overall current | ≤ 55mA |
Weight | ≤ 7 Kg |
Dimension (L*W*H) | 310mm*210mm*210mm |
Working temperature | -10°C~50°C |
Product images
Company Profile
Shipping and Delivery
Company Profile
Chongqing Gold Mechanical Electrical Equipment Co. Ltd. has been
actively involved in the design, development, and manufacturing of
geophysical exploration equipment for over four decades. Our
expertise encompasses various techniques used to capture images and
map subsurface features and structures such as minerals, oil and
gas reservoirs, groundwater, and geological formations.

At present, our company manufactures a diverse range of equipment
that encompasses resistivity meters, seismic receivers, magnetic
instruments, borehole loggers, and various other geophysical
sensors. Additionally, we offer geotechnical instruments such as
pile testers and drilling machines.

In collaboration with geologists, geophysicists, and other domain
experts, we design and develop instruments that cater to the unique
requirements of our clients. To maintain our leading edge in the
market and keep up with technological progress and scientific
advancements, we continuously invest in research and development to
ensure that our equipment is accurate, reliable, and efficient.
