WDJD-4A New Generation Insulation Resistance Tester Induce
Polarization Test Multifunction Tester
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's 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?
Application of WDJD-4A can be in metal and nonmetal mineral
resources detection, city geophysical exploration, railway and
bridge inspection and so on; as well as in hydrology and
engineering geology such as seeking for ground water, inspect dam
base and flood protection levee for incipient faults.
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 |
Standardconfiguration list of WDJD-4A
| No. | Details | Qty |
| 1 | WDJD-4 mainframe | 1 set |
| 2 | USB communication line | 1 set |
| 3 | Charger | 1 PC |
| 4 | 12V power input line | 1 PC |
| 5 | Instrument backpack | 1 PC |
| 6 | Windows software U Disk | 1 PC |
| 7 | Operational manual | 1 PC |
| 8 | Unpolarized electrodes | 1 Pair |
| 9 | Iron electrodes | 10 PCs |
Shipping and delivery
Certificate
Company Profile
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd is
specialized in manufacturing and developing of Geophysical
Exploration Instrument such as Resistivity Meter, IP Instrument,
Resistivity Image, Seismic Instrument, Electromagnetic Instrument,
Borehole Camera, Borehole Logging System, Water Level Meter;
Borehole Drilling Equipment including Core/ Water Well/ Tunnel/
Engineering/ Anchor Drilling Rigs&Accessory and Geodetic
Surveying Instrument(GNSS RTK System, Total Station, GIS Mapping
and Echo Sounder).
Our service
1. 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).
2. 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.
3. We can dispatch the experienced engineer for installation and
debugging after receiving the customer's notification.
4. 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.
5. After sale, we provide regular phone service to collect the
customer's suggestions and advice.
