Multifunctional Digital DC Instrument Is Used For Gold Mine
Exploration
What's the WDJD-4A Multiple Function DC resistivity meter?
WDJD-4A Multi-Function Digital DC Resistivity/IP Meter , based on
WDJD-3A, meets user’s most and latest needs. It features multiple
functions, high accuracy, fast speed, high reliability and
excellent expandability. Measured data of WDJD-4A can be processed
by other multi-electrode resistivity software, which makes the
interpretation more convenient. The single WDJD-4A can conduct
general electrical resistivity/IP survey. If WDJD-4A is used
together with WDZJ-4 multiplex electrode switcher (hereafter also
referred to as WDZJ or WDZJ-4 switcher), it can conduct
multi-electrode 2D Resistivity imaging.
What can WDJD-4A measure?
(1)If you conduct general (1D) electrical resistivity survey,
system configuration and layout is as shown in Fig.2-1. The system
consists of one WDJD-4A mainframe, electrodes, transmitting power
source.
- Positive pole (red) of the transmitting power source connects to
the “DC HV +” terminal (red, positive terminal) of WDJD-4A.
- Negative pole (black) of the transmitting power source connects to
the “DC HV –” (black, negative terminal) of WDJD-4A.
- Electrode A and B connect respectively to A, B terminals, and
potential electrodes M and N respectively to M, N connecting
terminal
(2)If you conduct general (1D) induced polarization (IP) survey,
system configuration and layout is as shown in Fig. 2-2. The system
consists of one WDJD-4A mainframe, electrodes, solid non-polarized
electrodes, transmitting power source.
- Positive pole (red) of the transmitting power source connects to
the “DC HV +” terminal (red, positive terminal) of WDJD-4A.
- Negative pole (voltage, in black) of the transmitting power source
connects to the “DC HV –” (black, negative terminal) of WDJD-4A.
- Electrode A and B connect respectively to A, B connecting terminals
- Solid non-polarized electrode M and N connect respectively to M, N
connecting terminal. For use and maintaining of solid non-polarized
electrode, please refer to Appendix
Application of the WDJD-4A?
Industry Application | Performance Metric |
Geotechnical Resolution | 0.5m target detection at 30m depth |
Mineral Detection | 2% sulfide content identification |
Environmental Sensitivity | 10ppm contamination threshold |
Infrastructure Penetration | 50m through reinforced concrete |
Research Accuracy | Peer-review ready data quality |
Process Specifications:
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 |
Our service
- We provide one-year warranty, during this period, we are
responsible for any mechanical failures or faults caused by design
technology or material and handle any improper errors for free; we
will still provide free technical assistance beyond this period
(only charge parts' cost price and traveling allowance).
- If there are any failures because of our products' quality in use,
we will provide the phone instructions within 2 hours to help
solving the problems, and we will supply on-line video technical
communication if necessary.
- We can dispatch the experienced engineer for installation and
debugging after receiving the customer's notification.
- We will provide free training, installation, debugging service in
China, it is also available to send professional staff overseas for
installation and debugging, only the traveling costs and labor
costs will be borne by you.
- After sale, we provide regular phone service to collect the
customer's suggestions and advice.
Shipping and delivery
Certificate
