SYSCAL Pro

Resistivity imaging for environmental applications

- Compact yet powerful
- ± 500 V - 250 W - up to 2.5 A
- Automatic ranging
- Automatic switching

- 10 receiver channels

SYSCAL Pro is a new all-in-one multinode resistivity imaging system. It features an internal switching board for 48 (Switch-48) or 72 (Switch-72) electrodes, 10 of which can be addressed simultaneously depending on the array type being used, and an internal 100 W power source. The output current is automatically adjusted (automatic ranging) to optimise the input voltage values and ensure the best measurement quality. The system is designed to automatically perform pre-defined sets of resistivity measurements with roll-along capability. Two strings of cable with 24 electrode take-out each (or 36) are connected on the back of the resistivity meter. Made of heavy duty seismic cable, these strings are available with standard 5 or 10 m electrode spacings. Customized cables may also assembled for special arrays or non-standard applications.

Compact, easy-to-use and field proof, the SYSCAL Pro measures both resistivity and chargeability (IP). It is ideal for environmental and civil engineering applications such as pollution monitoring and mapping, salinity control, depth-to-rock determination and weathered bedrock mapping. It can also be used for shallow groundwater exploration (depth and thickness of aquifers).

With the SYSCAL Pro, resistivity surveys can be performed very efficiently with one operator only, as surveys can be conducted in a fraction of the time it takes to acquire data with single channel instruments, you can afford to stack a greater number of times or increase the polarising and measuring time, or acquire more than one array type and combine them in data processing stage. All these help you acquire better quality field data.

The well-known reliability and accuracy of the SYSCAL range of resistivity meters will also mean extra value both for the contractor and the results end-user.

ACCURACY OF MEASUREMENTS

- Automatic SP compensation including linear drift
- Digital stacking for noise reduction
- Standard deviation computation
- Noise may be monitored before injection

Measured parameters

Electrical resistivity & chargeability (IP)

Technical specifications

OUTPUT CURRENT
- Automatic ranging (microprocessor controlled)
- Intensity: up to 2500 mA
- Voltage: up to 500V (1000V peak to peak) Switch version voltage up to 800V
- Power: up to 250 W (500W with external DC/DC converter)
- Selectable cycle time of 0.02, 0.25, 0.5 , 1, 2, 4, 8 s
- Current measurement precision: 0,2% typical.

INPUT VOLTAGE
- Measuring process: automatic ranging and calibration
- Input impedance : 100 Mohm minimum.
- Input voltage protection up to 1000V
Max channel 1: 15V, Max channel 2 to channel 10: 15V

Precision 0.2% typical Resolution: 1µV
- Power line rejection
- Voltage measurement precision: 0.5% typical
- Noise reduction: continuous stacking selectable from 1 to 255 stacks.
- SP compensation through automatic linear drift correction.
- Resistivity accuracy: 0,5% typical
- Induced polarization (chargeability) measured over up to 20 predefined or used defined windows.
- Noise reduction; automatic stacking number in relation with given standard deviation value

- 10 receiver channels

GENERAL
- Weather proof, shock resistant fiber-glass case
- Operating temperature: -20 to +70 °C
- Dimensions: 31 x 23 x 36 cm. (typical)
- Weight: 13 kg (typical, depends on number of electrodes)
- Internal memory for sequence files and data
- Power supply: two internal rechargeable 12V, 7.2 Ah battery ; optional external 12V backup car battery for transmitter power
- Autonomy with internal battery: 21,000 readings
- Standard cable string weight: 15 kg each for 5m spacing

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