WGMD-9 Electrical Resistivity Tomography Equipment

Features:

Ø Portability and flexibility: the transmiter unit and the receiver are designed in one unit, small and lightweight. The 200V internal transmitting power of WDA-1B can conduct multi-electrode Res imaging in wide variety of environments.

Ø Multi-functional: voltage/current range and small signal accuracy are improved greatly, which makes it applys with rock sampling tester, high-power IP receiver, general electrical method instrument, IP instrument, water detector, multi-electrode 2D/3D electrical imaging instrument, etc.

Ø Various measuring parameters, wide applications: it is available to measure data of voltage (V_P), current (I_P), apparent resistivity (ρs), Self-Potential (SP), apparent polarizability (M~M7), metal factor (G1~G7), half decay time (TH), deviation (r), induce polarization ratio (J) and voltage decay curve, etc.

Ø High power, wide range, high precision: max power up to 9000W (1500V*6A), voltage input range is 160Vp-p, high measuring precision of small signal (voltage is less than 0.1mV and current is less than 0.1mA with ±1% measuring precision);all of which make WDA-1/WDA-1B mainframe an ideal device for regions of high resistivity and to achieve better measured results.

Ø Bluetooth technology, wireless remote control: Bluetooth technology enables the tablet PC to control the WDA-1/WDA-1B mainframe in 10 meters. It enables all operations as set parameters, start measurement, display result and save data more easily.

Ø Tablet PC operate, powerful function: all operations as parameters setting, data display, data storage, curve drawing all be finished on the tablet PC, easy and visuable for filed data procession.

Ø Extendable system: data collecting and data storage are controlled by tablet PC. Software is flexible to be upgraded and extended (extending data storage capacity and collection software functions, also extend to special multi-electrode electrical instrument).

Ø Excellent anti-interface performance: integrated with multistage filtration and signal enhancement technologies and suppresser against common mode interference and differential mode interference. Measurement precision is high.

Ø Auto SP compensation, drift and electrode compensation (max compensation up to

±10V).

Ø WDA-1/WDA-1B is designed with two cable sockets which enable cross-hole electrode array works without switching control unit, and thus makes the measuring process much simpler and easier.

Ø Flexible control mode: All electrode arrays take rolling-along measuring mode;the section can extend continously or end automatically; to re-measure any point is easy and fast.

Ø Unique and open measuring process control. User-defined power-on time and power-off time controls measuring process. The main frame can also monitor variation of electrode potential automatically. If the parameter exceeds the user-defined over-variation limit, it stops measuring, and wait to measure again until it becomes stable. Thanks to this function, WDA-1/WDA-1B system can ensure accurate measured result even in harsh environment.

Ø The over-voltage protection of receiving part up to 1500V which can protect the instrument on any mistake operation.Transmitting unit supports over-voltage protection, over-current protection and AB open-circuit protection as well as DC high voltage reverse connection protection.

Ø Grounding resistance check: earth resistance of AB Current electrodes and MN Potential electrode can be inspected at any time.

Ø Sealed constitution features waterproof and dust-proof design, long lifetime.

Ø Flexible option of control: control unit may also be notebook PC to manipulate measurement.

Technical specifications:

Receiving part

· Voltage channel: ±32V（24 bitA/D）
   Accuracy: as Vp≥5mV, ±0.2% ±1 character
as 0.1mV≤Vp＜5mV, ±1% ±1 character

· Input impedance: ＞50ＭΩ

· Apparent polarization accuracy: ±1％±1character

· SP compensation range: ±10V

· Current channel: 6A（24bitA/D）
Measurement accuracy: as Ip≥5mA, ±0.2% ±1character
as 0.1mA≤Ip＜5mA, ±1% ±1character

· As for 50Hz industrial interface（common and different mode）depression is better than 80dB

Transmitter part:

· Maximium power: 9000W

· Maximium supply voltage: ±1500V

· Maximium supply current: ±6A

· Supply current width :1～60s, duty rate 1:1

Other for the geophysical equipment:

· Working temperature: -10℃～+50℃，95％RH

· Storge temperature: -20℃～+60℃

· Power supply: builtin 7.4V4Ah（or outside 12V）, lasting for 20h 

Configurations:

Certificates:

Packing: