>>Technical Parameters of the Underground Water Finder:

WDJD-4 Res/IP Meter

Receiving

Voltage precision±24V, ±0.4% ± 1LSB, 24 bit A/D

Input impedance ≥50MΩ

Apparent polarizability precision±1% ± 1LSB

SP compensation range±10V

Current channel6 A, ±0.4% ± 1LSB, 24 bit A/D

ResolutionVoltage: 0.1 micro volt; Current: 0.2 micro ampere.

Suppression≥80dB for 50Hz industrial frequency (common mode interference or differential mode interference).

Transmitting

Max transmitting power For general Res/IP sounding, 6600W.

For multi-electrode Res imaging, 1125W, limited by WDZJ-4 switcher

For Res cable, 1350W

For IP cable, 2400W

Max voltageFor general Res/IP sounding, ±1100V (2200V peak to peak)

For multi-electrode Res imaging, 450V DC (limited by WDZJ-4 switcher)

Max currentFor general Res/IP sounding, ±6A

For multi-electrode Res imaging, 2.5A DC (limited by WDZJ-4 switcher

Pulse width1~60s, duty ratio 1:1

Others

Display160 × 160 dot matrix LCD

Storage≤1GB

Working temperature-10°C~+50°C, 95 %RH

Storage temperature-20°C~+60°C

Instrument powerinternal 12V 9Ah rechargeable battery , lasts for 30 hours (or 12V external power supply)

Weight≤ 4.4 Kg

Dimension (L×W×H) /270mm X 246mm X 175mm

WDZJ-4  Switcher

Max electrode connected60 and 120 (for option)

Insulation impedance≥500MΩ

Max working voltage500VDC

Max working current2.5ADC

Power supplyInternal 7.4V 4AH rechargeable lithium battery, last for continuously 25 hours work

Working temperature-10°C~+50°C

>>Applications of the Underground Water Finder:

1. Water resources, metal and nonmetal mineral resources detection
2. City geophysical exploration, railway and bridge inspection
3. Hydrology and engineering geology as inspecting dam base and flood protection levee for incipient
faults
4. Geothermal prospecting