China Three Dimensional Electric Resistivity Tomography Ert 3D Geophysical Survey Equipment

Function:

•General resistivity/IP sounding

•Multi-electrode 2D/3D resistivity imaging

•Multi-electrode 2D induced polarization imaging

•Rock sample test

•Work as receiver in large power IP system

Application:

•Underground water inspection

•Energy resource prospecting

•City geophysical exploration

•Railway and bridge inspecting

•metal and nonmetal mineral resources survey

•Engineering geology

•Geothermal field survey

Transmitting

Maximum power

7200W(VES),2400W(Imaging)

Maximum voltage

1200V(VES),2400 peak-to-peak; 800V(Imaging), 1600 peak-to-peak

Maximum current

6A(VES), 3A(Imaging)

Power supply pulse width

1~60s, duty cycle is 1:1

Receiving

Voltage

± 32V (24 bit A/D)

Vp accuracy(before stacking)

If Vp≥5mV, ±0.2% ±1LSB. If 0.1mV≤ Vp<5mV, ±1%±1LSB.

Current

6A (24bit A/D)

Ip accuracy(before stacking)

If Ip≥ 5mA, ± 0.2% ±1LSB;If 0.1mA≤ Ip<5mA, then ± 1% ±1LSB..

Apparent Polarizability Accuracy

±1% ±1LSB

Suppression

≥80dB, for 50Hz or 60Hz (industrial frequency interference) either in common mode or differential mode interference

Input impedance

>50MΩ

SP compensation range

± 10V