TOP WDA-A Geophysical Multi-Function DC Resistivity & IP
Instrument/ Electrical Resistivity Measuring Instruments
Product included: Mainframe, charger, 2 electrodes, cables and
aluminum case
WDA-1 Multi-Function DC Resistivity & IP Geophysical Instrument/
Geophysical Resistivity Meter Electrical Resistance
Tomography/Ground Water Detection is new designed with most
advanced circuit design to improve the accuracy and stability,
which could use four poles to detect depth, intermediate gradient,
combined profile, five poles, three poles etc. methods to measure
VP,IP, SP, RO, M, TH... parameters. It is widely used in detection of
mines, water, engineering, environment protection, electrical
fields...
The working principle of WDA-1 Super Digital DC Electrical
Instrument is based on DC electrical exploration technology, which
uses artificial field methods to establish a stable electric field
underground, and studies the distribution law of underground
electric fields to understand geological structures and find
mineral resources. The following is its detailed working principle:
Transmitter:
The transmitter part of the instrument is responsible for
generating and outputting DC high-voltage power for use by
electrodes. These power supplies can be built-in lithium batteries
or other forms of DC high-voltage power supplies.
The transmitter part has overvoltage, overcurrent and AB open
circuit protection capabilities to ensure stable operation in
various complex environments.
Receiving part:
The receiving part is responsible for measuring the potential
difference or current change caused by the electric field generated
by the transmitting part in the underground medium. These
measurement data are crucial for analyzing the resistivity
distribution of underground media.
The receiving part has instantaneous overvoltage input protection
capability to prevent damage to the instrument due to external
voltage shocks.
Data acquisition and processing:
The instrument has a built-in advanced data acquisition system that
can collect and process measurement data from the receiving part in
real time. After digital processing, these data can be converted
into multiple geophysical parameters such as apparent resistivity,
natural potential, and apparent polarizability.
During data processing, the instrument automatically performs
natural potential, drift and electrode polarization compensation to
improve measurement accuracy.
Display and control:
The WDA-1 Super Digital DC Electrical Apparatus is equipped with a
full Chinese handheld computer and Bluetooth technology, which
realizes intuitive operation of the human-machine interface and
wireless remote control functions. Users can easily set parameters,
start measurements, transmit and display measurement results, etc.
through a tablet computer.
The instrument also has a diagnostic program that can quickly and
accurately determine the location of the fault and the main damaged
components, facilitating maintenance and repair.
1. High Accuracy: use the most advanced circuit design, single chip
microcomputer control, automatic noise reduction,
digital filtering to highly improve survey accuracy and stability.
2. Easy to Operate: humanized man-machine interface, built-in all
kinds of formulas to read VP, IP, RO, M, TH... parameters
3. More Parameters: could measure VP, IP, SP, RO, M, TH...
4. Complete Equipment: four poles to detect depth, intermediate
gradient, combined profile, five poles, three poles etc....about 30
kinds
5. Safe and Stable: Protections with over voltage, over current,
battery and battery display, data protection after interrupt of
electrical power
6. Artistic and Durable: use thin file switch panel, ABS shell.
| Receiving part |
| Voltage channel | ±32V(24 bit A/D) |
| Measurement accuracy | Vp≥5mV, ±0.2% ±1 character, 0.1mV≤Vp<5mV, ±1% ±1 character |
| Input impedance | >50MΩ |
| Apparent polarization accuracy | ±1%±1character |
| SP compensation range | ±10V |
| Current channel | 6A(24bit A/D) |
| Measurement accuracy | Ip≥5mA, ±0.2% ±1character, 0.1mA≤Ip≤5mA, ±1% ±1 character |
| As for 50Hz industrial interface(common and different
mode)depression | Better than 80dB |
| Transmitter part |
| Maximum power | 7200W |
| Maximum supply voltage | ±1200V |
| Maximum supply current | ±6A |
| Supply current width | 1~60s, duty rate 1:1 |
| Others |
| Working temperature | -10℃~+50℃, 95%RH |
| Storage temperature | -20℃~+60℃ |
| Power supply | Built-in 7.4V4Ah(or outside 12V), lasting for 20h |
| Main unit port | A, B, M, N, DC high voltage, outside battery, 2 cable port, RS-232,
blue tooth |
| Weight | ≤4kg |
| Dimension | 270mm*246mm*123mm |
