Main Features: • Transmitting unit and receiving unit are of all-in-one design, portable and lightweight. • Super high-power, high anti-interference performance and precision: up to 6600w (1100v×6A) power, 48Vp-p voltage range ensures to get a good result in a area with high resistance.
• Automatically achieving compensation of self-potential, drift and electrode polarization, up to ±10V.
• Receiving unit support transient over-voltage protection, transmitting unit supports over-voltage protection, over-current protection and AB open-circuit protection.
• For general resistivity and IP survey function, 9 types of electrode arrays are available. Electrode distance (namely “Program”) can be inputted or called. Geometric factor K can also be generated automatically or calculated manually. For multi-electrode 2D resistivity imaging, up to 18 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).
• Program: the program can memorize 100 groups of electrode distances, avoiding repetitive input. Or you just input a program Id and step to call the corresponding electrode distances.
• Earth resistance inspection: ground condition can be inspected at any time.
• Mass data storage: Up to 1GB capacity (extended) enable store 5,000,000 groups measuring data (including current, voltage, SP, Ro, Ms, metal factor, TH, R, J).
• All parameter and data are under power-failure protection; and thus data will not be lost even thought the system shuts down accidentally.
• USB port enables it to transfer data to computer.
Technical specification: | 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 channel | 6 A, ±0.4% ± 1LSB, 24 bit A/D | Resolution | Voltage: 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 voltage | For general Res/IP sounding, ±1100V (2200V peak to peak) For multi-electrode Res imaging, 450V 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 | 1~60s, duty ratio 1:1 | Others | | Display | 160 × 160 dot matrix LCD | Storage | ≤1GB | Working temperature | -10°C~+50°C, 95 %RH | Storage temperature | -20°C~+60°C | Instrument power | internal 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 connected | 60 and 120 (for option) | Insulation impedance | ≥500MΩ | Max working voltage | 500VDC | Max working current | 2.5ADC | Power supply | Internal 7.4V 4AH rechargeable lithium battery, last for continuously 25 hours work | Working temperature | -10°C~+50°C |
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