WGMD-60 is the new developed two dimensional resistivity imaging (ERT) system, which integrated electrode switching and 200v transmitting high power in the mainframe. It support max 60 electrode switching.The whole system features light weight and high stability.    

Internal Switcher & Internal High Power

For traditonal 60 electrode centralized system, it need to work with the external switcher box and external power source.
The connection as following:

WGMD-60 intergrated the tranmitting power (max 200v) and electrode switcher in one unit, no need external switcher or external power source, which make the field work more easy.
The connection as following:

•  Metal and nonmetal mineral resources detection
•  City geophysical exploration, railway and bridge inspection 
•  Hydrology and engineering geology as seeking for ground water, inspecting dam base and flood protection levee for incipient faults
•  Geothermal prospecting

Main fetures:
Advanced Measure Mode ── all electrodes are  measured by rolling profile, moving the electrode  can extend the section  with out limit; support repeat measurement of any point  and  continue the measurement from any point.

Unique, auto measure for high quality data── to set the power time flexibly , and  the instrument can auto monitoring the variation of self-potentiall(SP),  then adjust the start of measurement according to it for the high data quality.

Light and  portable -  transmitter, receiver, electrode switcher and transmitting power all designed in on unit, which features light weight, small demension, easy operation.

Wide power range, high precision ── wide input voltage range up to 48Vp-p, high measurement accuracy of small-signal which  even applys for the field with high grounding resistance.

Electrode Table ── Support to save up to 100 group electrode distance table  before field survey, which improve the  working efficiency.

32 bit microcontroller for full English human-machine interface and acquisition control, acquisition parameters setting, data display and storage, a variety of curve visuable.

2GB memory  for more than 10 million set of data(including voltage, current, apparent resistivity, spontaneous potential), or about 18,000  multi-electrode phudosection  ( take 552 measurement points for example). The data will not lost when power off suddently.

Storage data by U disk  format── the data could be export throught USB interface; the instrument will be auto recognized as U disk by PC, easy on operation.

Anti-interference technology── take multi-level filtering technology with signal enhancement technology to ensure the high measuring precision.

Automatic self potential, drift and electrode polarization compensation, up to ± 10V.

Receiving part with instant  overvoltage protection; transmitting part with protections of over-voltage, over-current, AB open circuit and DC inverse connected.

Grounding resistance check ── support to check  the grounding resistance of AB electrode and MN electrode.

Diagnostics can quickly and accurately  confirm the faults of the device.

Sealed box with the advantage of anti-moisture, anti-dust, long life .

Technical Specifications:


•  Voltage channel: ±24V, ± 5‰ ± 1LSB; 24 bit A/D.
•  Voltage sample resolution: 0.01μV
•  Input impedance: ≥50MΩ
•  SP compensation: ±10V
•  Current channel: 3.5A, ±0.5% ± 1LSB, 24 bit A/D
•  Current sample resolution: 0.02μV
•  Suppression: ≥80dB for 50Hz industrial frequency
•  Max transmitting power: 1750W
•  Max transmitting voltage: ±500V
•  Max transmitting current: ±3.5A
•  Transmitting wave: +on, off, -on, off ; bipolar
•  Switching number: 60 channels
•  Isolution: ≥500MΩ
•  Max working voltage: 500VDC
•  Max working current: 2.5ADC
Internal transmitting power ( it is available to connect with external power also)
•  Transmitting power: 50v, 100v, 150v, 200v for option
•  Transmitting current: ≤300mA
•  Display: 160 × 160 dot matrix LCD 
•  Storage: ≥ 2GB
•  Mainframe power: internal 48v lithium battery work with internal transmitting power, for 8 hours continously work. The real refer to the field work.
•  Interface: A/B/M/N, DC power input, charge port, USB
•  Dimension: 485mm×392mm×192mm
•  Weight: ≤12.3kg
•  Working temperature: -10℃~+50℃, 95 %RH
•  Storage temperature: -20℃~+60℃




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