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specifications |
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Ten input dipoles
- Signal waveform: Time Domain (ON+, OFF, ON
-, OFF) with pulse duration of 0.5 , 1 , 2 ,
4 or 8 seconds
- Up to twenty arithmetic, logarithmic or
fully programmable IP chargeability windows
- Computation of apparent resistivity,
average chargeability and standard deviation
- Input impedance: >50 Mohms
- Input overvoltage protection up to 1000
Volts
- Automatic SP bucking ±15V with linear
drift connection
- Internal calibration generator for a true
calibration on request of the operator
- Automatic synchronization and
re-synchronization process on primary
voltage signals whenever needed
- Automatic stacking number in relation with
a given standard deviation value
- Proprietary intelligent stacking process
rejecting strong non-linear SP drifts
- Common mode rejection: more than 100 dB
(for Rs = 0)
- Ground resistance measurement from 0.1 to
100 kohms
- Battery test: graphic plot of battery
status
- Primary voltage: range: 10 µV to 15V,
resolution: 1µV, accuracy: typ. 0.3%
- Chargeability: range: 10µV to 15V,
accuracy: typ. 0.6%
- Self Potential: range: ±15V, resolution:
0.1 mV
- Time constant (tau) range: Cole-Cole
inversion continuous from 10 milliseconds to
100 seconds ; Customized range on request
- Dimensions: 31x21x25 cm
- Display: 16 lines by 40 characters, 128 x
240 dots LCD, with automatic compensation of
contrast and of temperature
- Keypad: 16 keys
- Weight: 8 kg including internal battery
- Operating temperature: -30°C to +70°C
- Power supply: 12V internal rechargeable
battery with more than 20 hours service at
+20°C ; a 12V external battery can be also
used.
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 ELREC 10, Ten dipole IP receiver
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The
With graphics display for data quality monitoring
TEN SIMULTANEOUS DIPOLES
TWENTY PROGRAMMABLE CHARGEABILITY WINDOWS
HIGH ACCURACY AND SENSITIVITY
ELREC 10 is a ten dipole Time Domain Induced Polarization receiver designed for high productivity surveys
in Mineral Exploration. ELREC 10 is a highly sensitive receiver and features a large graphic display for
user friendly operation and a Cole-Cole parameter computation for in-the-field time constant analysis.
Ten dipoles:
The ten dipoles of ELREC 10 offer an increased productivity in the field for dipole-dipole,
gradient or extended poly-pole arrays. It is also possible to measure five differential
(non adjacent) dipoles, for special electrode configurations.
Twenty programmable windows:
Beside classical arithmetic and logarithmic modes, ELREC 10 also offers twenty fully programmable
windows for a higher flexibility in the definition of the IP decay curve.
User Friendly Interface:
user friendly interface has been set up in ELREC 10 with a minimal number of key strokes for each operation.
Intelligent Stacking Process:
When the electric noise has strong non-linear effects, the standard arithmetic stacking process requires a
long acquisition time to measure the IP effect ; a proprietary intelligent stacking algorithm has been
specially developed in ELREC 10 to deal with strong non-linear SP bursts and minimize the acquisition time for a given reading accuracy
Monitoring Display:
A large graphic LCD (128x240 dots) permits the operator to display simultaneously the IP decay curves of
the ten dipoles during the acquisition, for a global visualization of the readings and for better
quality control. Before the acquisition, the ELREC 10 can be used as a one channel DC graphic display,
for monitoring the noise level and checking the primary voltage waveform, through a continuous display
process.
Cole-Cole Parameters:
An inversion procedure has been implemented to compute Cole-Cole time constant at the end of the acquisition.
This allows a possible grain size discrimination analysis.
Internal Memory:
The memory can store up to 3200 dipole readings, each reading including the full set of parameters
characterizing the measurements. An explicit data storage procedure has been developed including the display of
warning messages for data not yet stored.
File names are available for a better memory management of sets of readings.
Field proof Instrument:
ELREC 10 operates in a wide temperature range and
features a fiber-glass case for resistance to field
shocks and vibrations.
Copyright
© 1998 IRIS Instruments
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