ELREC PRO (PDF)

Switch Pro

10 CHANNELS / IP RECEIVER FOR MINERAL EXPLORATION
10 simultaneous dipoles
20 programmable chargeability windows
High accuracy and sensitivity

ELREC Pro: this new receiver is a new compact and low consumption unit designed for high productivity Resistivity and Induced Polarization measurements. It features some high capabilities allowing to work in any field conditions.

Reception dipoles: the ten dipoles of the ELREC Pro offer an high productivity in the field for dipole-dipole, gradient or extended poly-pole arrays.

Programmable windows: beside classical arithmetic and logarithmic modes, ELREC Pro also offers a Cole-Cole mode and a twenty fully programmable windows for a higher flexibility in the definition of the IP decay curve.

IP display: chargeability values and IP decay curves can be displayed in real time thanks to the large graphic LCD screen. Before data acquisition, the ELREC Pro can be used as a one channel graphic display, for monitoring the noise level and checking the primary voltage waveform, through a continuous display process.

Internal memory: the memory can store up to 21 000 readings, each reading including the full set of parameters characterizing the measurements. The data are stored in flash memories not requiring any lithium battery for safeguard.

Switching capability: thanks to extension Switch Pro box(es) connected to the ELREC Pro unit, the 10 reception electrodes can be automatically switched to increase the productivity in-the-field.

FIELD LAY-OUT OF AN ELREC PRO UNIT

The ELREC Pro unit has to be used with an external transmitter, such as a VIP transmitter.
The automatic synchronization (and re-synchronization at each new pulse) with the transmission signal, through a waveform recognition process, gives an high reliability of the measurement.

Before starting the measurement, a grounding resistance measuring process is automatically run ; this allows to check that all the electrodes are properly connected to the receiver.

Extension Switch Pro box(es), with specific cables, can be connected to the ELREC Pro unit for an automatic switching of the reception electrodes according to preset sequence of measurements ; these sequences have to be created and uploaded to the unit from the
ELECTRE II software.

The use of such boxes allows to save time in case of the user needs to measure more than 10 levels of investigation or in case of large 2D or 3D acquisition.

DATA MANAGING

PROSYS software allows to download data from the unit. From this software, one has the opportunity to visualize graphically the apparent resistivity and the chargeability sections together with the IP decay curve of each data point. Then, one can process the data (filter, insert topography, merge data files…) before exporting them to ?txt? file or to interpretation software:
RES2DINV or RESIX software for pseudo-section inversion to true resistivity (and IP) 2D section.
RES3DINV software, for inversion to true resistivity (and IP) 3D data.

FEATURES

TECHNICAL SPECIFICATIONS

Input voltage:
- Max. for channel 1: 15 V
- Max. for the sum from channel 2 to channel 10: 15 V
- Protection: up to 800V
Voltage measurement:
- Accuracy: 0.2 % typical
- Resolution: 1 µV
Chargeability measurement:
- Accuracy: 0.6 % typical
Induced Polarization (chargeability) measured over to 20 automatic or user defined windows
Input impedance: 100 MW
Signal waveform: Time domain (ON+,OFF,ON-, OFF) with a pulse duration of 500 ms - 1 s - 2 s - 4 s -8 s
Automatic synchronization and re-synchronization process on primary voltage signals
Computation of apparent resistivity, average chargeability and standard deviation
Noise reduction: automatic stacking number in relation with a given standard deviation value
SP compensation through automatic linear drift correction
50 to 60Hz power line rejection
Battery test

GENERAL SPECIFICATIONS.

Data flash memory: more than 21 000 readings
Serial link RS-232 for data download
Power supply: internal rechargeable 12V, 7.2 Ah battery ; optional external 12V standard car battery can be also used
Weather proof
Shock resistant fiber-glass case
Operating temperature: -20 °C to +70 °C
Dimensions: 31 x 21 x 21 cm
Weight: 6 kg

Ordering Inforamtion

Description		Order Number
ELREC PRO		530-PRO-MS0100

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