Main Function of WDJD-4
1.1D Vertical electrical sounding(VES) Resisitity
2.1D Vertical electrical sounding(VES) IP
1. High surveying precision with anti-interference performance, with technologies like multistage wave filtration and signal enhancement.
2.Automatically detect and offer compensation forself-potential, drift and electrode polarization.
3.Over-voltage protection for receiving unit,transmitting unit and AB open-circuit protection.
4.9 types of electrode arrays are available for normal resistivity and IP survey.Manual inputted electrode distance, andautomatically or calculated manually gnerate can be Geometric factor K.
5. 18 electrode arrays are available for multi-electrode 2D resistivity imaging. 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).
6.The program can memorize 100 groups of electrode distances which can avoid repetitive input. Or just input a program ID and step to call the corresponding electrode distances.
7. Earth resistance inspection can be inspected at any time.
8.Mass data storage: Up to 1GB capacity (extended) enable store 5,000,000 groups measuring data
9.Under power-failure protection; data will not be lost even thought the system shuts down accidentally.
10. USB port for transfer data to computer.
•Voltage channel: ± 6 V
•Survey precision: if Vp≥10 mV then ± 5‰ ± 1 LSB, if Vp < 10 mV, then ±1% ± 1 LSB
•Input impedance: ≥50MΩ
•Apparent polarizability precision: ±1% ± 1 LSB
•SP compensation range: ±1 V
•Current channel: 5 A,
•Suppression: ≥80dB for 50Hz industrial frequency
•Voltage maximum: 900V
•Current maximum: 5A( when voltage ≤ 900V )
•Pulse width: 1～ 60s, duty ratio 1:1
•Operating temperature: -10℃～50℃, humidity: 95 %RH
•Memory temperature: -20℃～50℃
•Instrument power: eight D size batteries (or same specs nickel-cadmium battery)
•Complete appliance current: ≤ 55mA
•Weight: ≤ 7 Kg
•Dimensions (L×W×H): 310mm X 210mm X 210mm
Field Surveying Data