Resisitvity Tomography Geophysical Exploration Instrument ERT
Survey
Main Functions
The resistivity tomography geophysical exploration instrument can
solve the underground geological problems by observing and studying
the distribution law of the artificially established underground
stable current field. It has the characteristics of intuitive,
efficient, high resolution and high precision. The electrical
properties of underground media are studied by the changes of the
artificial stable current field established by ground observation,
and the buried depth, properties and shapes of underground
obstacles are determined by analysis.
Electrode arrangement
Up to 18 types of devices are 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.
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 |
