Introduction
Applying geophysics for groundwater exploration and/or resource evaluation is only about 10 to 15 years in practice. The ever-increasing need for groundwater has translated into using subsurface imaging to meet the demand. Generally speaking, the methods applied to find groundwater are very similar to those used for natural resource exploration; for example, mineral or petroleum products.
The resisivtity survey meter has Multi function. It can cover all functions of conventional resistivity / IP meter, 2D / 3D ERT system, rock sample tester and multi parameter water detector.
The geophysical resistivity meter can measure muiti parameters such as voltage, current, apparent resistivity, apparent polarizability, natural potential, self electric gradient, half decay, attenuation, excitation ratio, deviation, metal factor, ground resistance and voltage decay curve (i.e. IP spectrum data).
Multi function: cover all functions of conventional resistivity / IP meter, 2D / 3D ERT system, rock sample tester and multi parameter water detector.
Full waveform sampling: synchronous full wave recording of transmitting current and receiving potential, real-time monitoring of self electric interference, and secondary calculation of polarizability according to full wave potential.
Rich parameters : voltage, current, apparent resistivity, apparent polarizability, natural potential, self electric gradient, half decay, attenuation, excitation ratio, deviation, metal factor, ground resistance and voltage decay curve (i.e. IP spectrum data).
High precise measurement: analog and digital multi-level filtering ensures 1uv repetition accuracy, and high quality raw data can still be obtained in the area with complex geoelectric conditions.
Intelligent control: display and store all kinds of data and draw all kinds of curves or graphs in real time; adopt general SD memory card, USB2.0 high-speed transmission; work software supports remote upgrade; the panel is equipped with "infinity" pole, so it can automatically measure ρ SA and ρ sb without manual switching.
Stable: IP67 waterproof, instantaneous over-voltage protection at the receiving end, over-current protection and high-voltage input reverse connection protection at the transmitting end.
Index | DZD-8 Multi-function Full Wave DC Resistivity Meter |
Receiver | Full waveform record of current and potential |
Measuring voltage range | ±40V 32 A/D |
Measuring voltage resolution | 5nV |
Measuring voltage accuracy | Voltage ＞1mV, accuracy ≤0.1%， voltage ≤1mV, accuracy±1uV |
Apparent polarizability accuracy | Fs. error≤±0.2% |
Measuring current range | 0 -6000 mA（32 A/D） |
Measuring current resolution | 10nA |
Measuring current accuracy | When Ip≥10mA，±0.1%， when Ip＜10mA，accuracy ±2uA |
Sample frequency | 1KHz |
Input impedance | ≥50MΩ |
Suppression of 50Hz power frequency interference | ＞120dB |
SP compensation | ±40V Full range real-time automatic tracking digital compensation |