WDZS-3A DC Resistivity Meter for groundwater
WDZS-3A DC 1D Resistivity Sounding Meter is the basic 1D VES device of geo-electrical method, with functions of SP survey and 1D Resistivity sounding. The electrical method for groundwater exploration is the most economic, effective and widely used. WDSZ-3A is a special geo-electrical instrument for electrical underground water prospecting with the most parameters, the most function, and the most advanced performance at the present time.
Features:
| • Transmitter and Receiver all in one, it is portable and flexible, high accuracy. |
| • Adopting the small volume, low power consumption, muti-function, Cut off power automatically if no operation in 10 minutes. |
| • Receiver have the ability of instant input over-voltage protection, transmitter have the ability of over-voltage protection, over-current protection, AB open-circuit protection. |
| • Multi-parameter, multi mode---- the instrument can display SP, apparent resistivity, apparent polarizability, half-life, attenuation, excitation ratio, deviation, general parameter and so on. At the time of secondary time rate working, the instrument can display secondary time rate parameter and qualitative evaluation parameter. |
| • All the parameters along a survey line can be drown to curves, directly and concisely. |
| • Touching Panel with Chinese character menu, prompt, convenient. |
| • Setting working period arbitrarily, 9 kinds of common field working methods can be chosen, array constant can be inputted and calculated. |
| • Array constant table----memorizing 100 different array constant, avoiding repetitive input, input number can invoke polar distance or reset. |
| • Ground-resistance inspection----ground condition can be inspected at any time, operation is flexible. |
| • Mass data storage----memorizing 3500 survey station data for electrical resistivity and free mode，2500 survey station data for induced polarization, 43680 electrical resistivity data for multi electrode electrical resistivity surveying. |
| • All parameter and data are power-cut protected, data can not be lost when closedown or changing battery. |
| • RS-232C port can communicate with other computers. |
| • Ascertaining fault location and damaged parts accurately by diagnostic program. |
| • All sealed constitution----water-proof and dust-proof design, long life and other virtue |
Technical specifications:
| Receiving part | |
| 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, survey precision: if IP≥ 10mA then ± 5‰ ± 1 LSB, if IP < 10 mA, then ±1% ± 1 LSB |
| Suppression | ≥80dB for 50Hz industrial frequency |
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Transmitter part |
|
| Maximum voltage | 900V |
| Maximum current | 5A( when voltage ≤ 900V ) |
| Pulse width | 1～ 60s, duty ratio 1:1 |
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Other |
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| Operating temperature | -10℃～50℃, humidity: 95 %RH |
| Memory temperature | -20℃～50℃ |
| Complete appliance current | ≤ 55mA |
| Weight | ≤ 7 Kg |
| Dimensions (L×W×H) | 310mm * 210mm * 210mm |
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