ABEM Terrameter LSField-proven Imaging system measuring

Resistivity, time-domain IP and SP.

Designed for high reliability and robustness under harsh field conditions.

Highest productivity usingABEM unique

roll-along method.

Data f ile: Whole98 Model f ile: Whole98

ERIGRAPH - ABEM Instrument AB - Lunds Universitet - Terraohm

WENNER-SCHLUMBERGER 2D INVERTED MODEL

Hallandsåsen: March 1995 - July 1998

N S

Torleif Dahlin, Geotechnology, Lund University - 1999

46 75 120 200 320 510 830 1300 2200 3500 5600Resistivity/[ohmm]

190600 190800 191000 191200 191400 191600 191800 192000 192200 192400 192600 192800 193000 193200 193400 193600 193800 194000 194200 194400 194600 194800 195000 195200 195400 195600 195800 196000 196200 196400 196600 196800 197000 197200 197400 197600 197800 198000 198200 198400 198600 198800 199000 199200Distance/[m]

240 240200 200

160 160120 12080 80

40 400 0

Level/[m.a.s.l.]

BP13

BP12/KB12BP21/KB11

BP20/KB10 BP22/KB9EKB10BP11 EKB12B BP19 BP10 BP9+18 BP8 -- 240m NW line BP23/KB4

BP15/KB8

T T T T T T T T T T T T T T T T T T T T T T T T T T T T

++++++++++++++ ++++++

+

++ +++++++++++++

cable 1 cable 2 cable 3 cable 4

++++++

++++++

4 cables for an efficient roll-along survey!

Surveying principle for multi-electrode systems

Roll-along with 2x32 vs 4x21

Easy to use with multi-lingual graphical user interface on sunlight readable color LCD.

Integrated workf

low guidance

Multi-lingual

Open communication platform for data exchange, internet connectivity and remote diagnostics (TCP/IP, USB).

Built-in GPS

On-site capabilities for data quality assurance.

System diagnostics and fault tolerance.

• Built-in self-test of inputs and transmitter.

• Transmitter load, temperature, power disapation, power supply voltage monitoring

• Automatic monitoring of all relay switch operations.

• Relay coil current monitoring.

Superior quality in data acquisition with powerful transmitter and high dynamic

range multi-channel receiver.

Transmitter

• True constant current transmitter

• 250 W output power

• 600 V max output voltage

• 2.5 A max output current

• Full waveform monitoring of output current and voltage

Transmitter working ranges

0

100

200

300

400

500

600

700

0.001 0.01 0.1 1 10

10W

100W (SAS)

250W

Voltage

Current

Receiver

• 4 or 12 input channels

• Galvanically isolated inputs

• Arbitrary No. of IP time windows

• Full waveform sampling and recording(up to 30k sample/s).

• 24 bit A/D converters

• Auto-range ±5V or ±600V

The advantage ofgalvanically isolated Inputs

A M 1 N 1 M 2 N 2 M 3 N 3 M 4 N 4 B

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

R X1 R X2 RX3 RX4

TX

• Superior common mode range (2 kV).• Eliminates over-range measuring errors.

Electrode switch • Full 10x64 matrix relay switch.• Efficient 12 channel switching.• 64 electrodes simultaneous switch capacity

(=> 81 electrodes with standard cables).