Product Description

Application:  
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
 
Function:   
1. 1D resistivity sounding
2. 1D induced polarization sounding
3. 2D Electrical resistivity imaging

Main Features:
1. Transmitting unit and receiving unit are of all-in-one design, portable and lightweight.
2. Super high-power, high anti-interference performance and precision: up to ***0w (***0v×6A) power, *8Vp-p voltage range ensures to get a good result in a area with high resistance.
3. Automatically achieving compensation of self-potential, drift and electrode polarization, up to ±*0V.
4. Receiving unit support transient over-voltage protection, transmitting unit supports over-voltage protection, over-current protection and AB open-circuit protection.
5. For general resistivity and IP survey function, 9 types of electrode arrays are available. Electrode distance (namely Program) can be ted or called. Geometric factor K can also be generated automatically or calculated manually.
    
For multi-electrode 2D resistivity imaging, up to *8 electrode arrays are available. It could scanning measure according to fixed section (including AMNB, ABMN, AMBN, AMN, MNB, A-MN-B, Sp M, Sp MN, charge M, charge MN) or continuous rolling scanning measure according to variable section (including A-M, A-MN, AB-M, AB-MN, MN-B, A-MN rectangle).
1. Program: the program can memorize **0 groups of electrode distances, avoiding repetitive . Or you just a program Id and step to call the corresponding electrode distances.
2. Earth resistance inspection: ground condition can be inspected at any time.
3. Mass data storage: Up to 1GB capacity (extended) enable store 5,**0,**0 groups measuring data (including current, voltage, SP, Ro, Ms, metal factor, TH, R, J).
4. All parameter and data are under power-failure protection; and thus data will not be lost even thought the system shuts down accidentally.
5.  USB port enables it to transfer data to computer. 

Technical specification:
  WDJD*4 Res/IP Meter
Receiving:  
Voltage precision ±*4V, ±0.4% ± 1LSB, *4 bit A/D
Input impedance ≥*0MΩ
Apparent polarizability precision ±1% ± 1LSB
SP compensation range ±*0V
Current channel 6 A, ±0.4% ± 1LSB, *4 bit A/D
Resolution Voltage: 0.1 micro volt; Current: 0.2 micro ampere.
Suppression ≥*0dB for *0Hz industrial frequency (common mode interference or differential mode interference).
Transmitting:  
Max transmitting power For general Res/IP sounding, ***0W.
For multi-electrode Res imaging, ***5W, limited by WDZJ*4 switcher
For Res cable, ***0W
For IP cable, ***0W
Max voltage For general Res/IP sounding, ±***0V (***0V peak to peak)
For multi-electrode Res imaging, **0V DC (limited by WDZJ*4 switcher)
Max current For general Res/IP sounding, ±6A
For multi-electrode Res imaging, 2.5A DC (limited by WDZJ*4 switcher)
Pulse width: 1~*0s, duty ratio 1:1
Others:  
Display: **0 × **0 dot matrix LCD
Storage: ≤1GB
Working temperature: **0°C~**0°C, *5 %RH
Storage temperature: **0°C~**0°C
Instrument power: internal *2V 9Ah rechargeable battery , lasts for *0 hours (or *2V external power supply)
Weight: ≤ 4.4 Kg
Dimension (L×W×H): **0mm X **6mm X **5mm
 
  WDZJ*4  Switcher
Max electrode connected: *0 and **0 (for option)
Insulation impedance: ≥**0MΩ
Max working voltage: **0VDC
Max working current: 2.5ADC
Power supply: Internal 7.4V 4AH rechargeable lithium battery, last for continuously *5 hours work
Working temperature: **0°C~**0°C