SYSCAL R1 Plus

For groundwater, environmental and civil engineering applications

- Compact, easy to use
- Computation of resistivity and chargeablity (IP)
- Internal memory
- Voltage up to 600 V
- Power up to 175 W
- Current up to 2.5 A

COMPACT
Direct computation of apparent resistivity and data storage in the instrument itself (no need for a computer in the field)
Total weight of the unit less than 10 kg
Internal rechargeable 7 Ah battery with several field days autonomy allowing at least 1000 readings of 10 s each for 250 V voltage and 2 kohms resistance.

ACCURATE
Noise monitoring before injection
SP compensation including linear drift
Digital stacking for noise reduction
1µV resolution after stacking
Standard deviation computation

RELIABLE
Weather proof
Wide operational temperature range from -20°C to +70°C
Shock-resistant fiber-glass case

The SYSCAL R1 Plus resistivity meter, specifically designed for medium-depth exploration, can be used for civil engineering, groundwater and environmental projects, to solve problems such as depth-to-bedrock determination, localization of weathered bedrock, clay-gravel determination, measurement of depth and thickness of aquifers, salinity control, pollution monitoring, etc.

The SYSCAL R1 Plus combines a power source, transmitter up to a 600 V output voltage, and receiver in a single unit ; its compactness makes it an effective tool for intensive resistivity surveys.

The SYSCAL R1 Plus generates the current, measures the voltage between the receiving electrodes and displays the apparent resistivity value. Various electrode arrays are available: Schlumberger and Wenner soundings or profiling, gradient and dipole-dipole.

IP chargeability measurements are performed on four predefined windows, allowing data quality control.

The measurement is made fully automatically, controlled by a microprocessor : automatic self-potential correction, automatic ranging, digital stacking for signal enhancement, error display in case of procedure troubles.

The internal memory can store more than 800 measurements (3000 in ulti-electrode mode) with full information on intensity, voltage, resistivity, IP Chargeability, geometrical parameters, station number. A serial link permits transfer of the data to a microcomputer for plotting and interpretation of the data.

Measured parameters

- Measurement and display of current, voltage, self potential, standard deviation
- Computation and display of apparent resistivity and IP chargeability for main electrode arrays : Schlumberger, Wenner, gradient, dipole-dipole, etc.
- Display of noise level before measurement
- Storage of data in the internal memory (more than 800 readings in standard mode and 3000 readings in multi-electrode mode)
- Serial port, data transfer to computer or printer.

Technical specifications

Transmitter Specifications
- Maximum output power : 200 W
- Maximum output voltage : 600 V (1200 V peak to peak)
- Maximum output current : 2.5 A for 12 V & 50 V range, 1.8 A for 100 V range, 0.7 A for 250 V range, 0.7 A for 600 V range
- Output current specifications: Resolution of 10µA, Standard accuracy of 0.3 %, max. 1 % from -20°C to +70°C.
- Waveform choice of [ON+,ON-] or [ON+,OFF,ON-,OFF] (for IP measurements) with a selectable pulse duration (0.5 s, 1 s or 2 s).

Receiver Specifications
- Output impedance: more than 10 Mohms
- Input overvoltage protection
- Input voltage range : -10 V to +10 V
- Automatic SP bucking (-10 V to +10 V) with linear drift correction (up to 1 mV/s) on a plus-minus-plus cycle.
- 50 Hz and 60 Hz power line rejection
- Voltage measurement specifications: Resolution of 1µV after stacking, Standard accuracy of standard 0.3 %, max. 1 % from -20°C to +70°C
- IP chargeability measurement specifications: resolution 0.1 mV/V, accuracy 1% of displayed value for primary voltage higher than 10 mV
- Continuous digital stacking up to 255 stacks.

General Specifications
- LCD display of 2 lines of 20 characters
- Weather resistant case
- Dimensions : 31x31x21 cm
- Weight : 9.5 kg, including battery
- Power supply : internal 12 V 7 Ah rechargeable battery, or external 12 V car battery
- Operating temperature range : -20°C to +70°C
- Storage temperature : -40°C to +70°C

Accessories

Set of standard accessories for electrical surveying :
- 10 stainless-steel electrodes
- 2 reels with 350 m wire
- 2 reels with 125 m wire
- 12 cord clips for electrode-reel connections.

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