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› Geo-Electric Explorations
50
A6000SE
SUPPORTED INVESTIGATION
Multi-electrode geoelectrical prospections
V.E.S. Vertical Electric Survey
Measure of self potentiaL
Measure of chargeability
Induced Polarization
Seismic refraction investigation
Seismic riflession investigation
Seismic tomography
Down-hole / Cross-hole
M.A.S.W. / S.A.S.W. / Re.Mi.
Passive seismic acquisition
Seismic vibration monitoring
Nakamura method
SPECIFICATIONS
Electric measures:
Outlet current:
• Automatic regulation (4 steps)
• Maximum intensity: 1.2 A at 50V
• Outlet voltages: ±50V, ±100V, ±250V, ±500V
nominal
• Maximum power: 60W
• Input time: set from 100 ms to 30s
• Measurement precision: ±38μA
Potential measurement:
• Auto range (4 steps)
• Maximum full scale: 50V
• Inlet impedance: 1 MΩ
• Network frequency filter: 50 Hz
• Measurement precision: maximum ±38μV
(within range 0-1.25V), minimum ±1.53mV
(within range 5-50V)
• Noise reduction: with average from 2 to 10
measurements
• Automatic zeroing of self-potential
• Accuracy of the resistivity measured: ±1%
• Chargeability measured on four temporal
windows of overall duration of 1.2 seconds
Electrodes managed:
• 256 with external commutating boxes
Data formats:
• TSV, CSV, DAT
Seismic exploration:
• Converters: 24 bit resolution, sigma- delta
technology
• Dynamic range: 144 dB (theoretical)
• Maximum distortion: +/-0.0010%
• Band width: 2Hz-30KHz
• Common mode rejection: 110 dB at 60 Hz
• Diaphony: -120dB at 20Hz
• Noise threshold of the programmable amplifier:
27nV
• Trigger precision: 1/30 of the sampling time
• Maximum range of inlet signal: +/-5V
• Inlet impedance at 1000 samples/second:
20MΩ
• Amplification levels: 0 dB, 6 dB, 12 dB, 18 dB,
24 dB, 30 dB, 36 dB that can be set singularly
for each channel or for groups of channels
that can be organized freely
• Anti-alias filter: -3dB, 80% of Nyquist frequency,
-80dB
• Pre-trigger time: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15, 16, 17, 18, 19, 20, 50, 100, 200,