2D Electrical Geophysical Exploration Instrument with
Multi-electrodes
Introductuon
WGMD-3A high density resistivity measurement system (geophysical
exploration instrument) is made of WDJD-3A multifunctional digital
DC resistivity instrument as the measurement and control host, with
WDZJ-4 or WDZJ-120 multichannel electrode converter, the system has
the characteristics of large storage, accurate and rapid
measurement, convenient operation, and can be easily used with
common high density electrical processing software. It makes the
interpretation more convenient and intuitive. The system can be
widely used in energy exploration and urban geophysical
exploration, railway and bridge exploration, metal and non-metal
mineral resources exploration, as well as in hydrologic and
engineering geological exploration, such as finding groundwater,
determining the location of dam foundation and flood control
levees, and geothermal exploration.
Main features and functions
* Accuracy and efficiency: Under the premise of maintaining good
repeatability, the measurement time of a 552 points section is
generally less than 15 minutes
* Super-large storage: In high-density mode I (only the resistivity
parameter is stored), no less than 43,680 measurements can be
stored; In high-density mode II (storage of resistivity and current
parameters), no less than 21840 measurements can be stored. Power
failure is not lost.
* Grounding check: In field work, you can easily and quickly check
whether the grounding of each electrode is good.
* Electrode arrangement: Up to 18 device types and extensible. It
can be scanned according to fixed section (electrode arrangement is
AMNB, ABMN, AMBN, AMN, MNB, A-Mn-B, self-charged M, self-charged
MN, charging M, charging MN) and continuous rolling scanning
measurement according to variable section (electrode arrangement is
A-M, A-MN, AB-M, AB) -MN, MN-B, A-MN rectangle, A-Mn-B, cross-hole
dipole), among which, continuous rolling scanning measurement can
allow the measurement section to be connected to any length under
the condition that the total number of electrodes is unchanged,
which is convenient for long section tracking, enabling users to
solve practical problems at low cost and high time.
* All electrode arrangement measuring section can be arbitrarily
specified section starting electrode number, convenient and
flexible.
Technical specification
Receiving part
| |
Voltage channel:
| ±6V |
Measurement accuracy:
| Vp≥10mV时,±0.5% ±1 character Vp< 10mV时,±1% ±1 character |
Input resistance:
| > 50 MΩ |
Apparent polarizability measurement accuracy:
| ±1% ±1character |
Sp compensation range:
| ±1V . |
Current channel:
| 5A |
Measurement accuracy:
| Ip≥ 10mA时,±0.5% ±1character Ip< 10mA时,±1% ±1character |
The suppression of 50Hz power frequency interference (common mode
interference and differential mode interference) is better than 80dB
| |
Launch part
| |
Maximum transmit power:
| 4500W |
Maximum supply voltage:
| ±900V |
Maximum supply current:
| ±5A |
Power supply pulse width:
| 1~60 seconds, the duty ratio is 1:1
|
| Other | |
Operating temperature:
| -10°C~ +50°C, 95%RH |
Storage temperature:
| -20°C~ +60°C |
Instrument power supply:
| No. 1 battery (or nickel-cadmium battery of the same specification)
8 pieces
|
Current current:
| ≤55mA |
| Weight: | ≤7KG |
Volume:
| 310mm*210mm*210mm |
WDZJ-3 multi-channel electrode converter
| |
Converting the number of electrodes:
| 60 road
|
Insulation properties:
| ≥500 MΩ |
Maximum working voltage:
| 450 VDC |
Maximum operating current:
| 2.5 ADC |
Instrument power supply:
| No. 1 battery (or nickel-cadmium battery with the same
specification) 8 pieces
|
Operating temperature:
| -10°C~ +50°C |
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