Syscal Terra
from Iris Instruments

Introducing the Syscal Terra from Iris Instruments: The Next Generation Resistivity Meter. This redesigned model of the renowned Syscal series boasts a modern, and robust design, making it ideal for efficient field data acquisition and deployment. Featuring a high-power output (up to 1,000 V), the unit integrates a large, built-in colour touchscreen alongside a manual keypad, ensuring intuitive menu navigation and data visualization. Streamlining workflow, the system allows users to upload sequence files created in Elecre Pro via USB drive or Wi-Fi, significantly reducing setup time in the field.

The Syscal Terra’s 20 measurement channels enable rapid acquisition of high-resolution Resistivity and Induced Polarisation (IP) data. By collecting both IP and Resistivity measurements during the “On time” injection cycle, sampling time is minimized. Its versatility extends to supporting multiple Wenner-Schlumberger reciprocal and dipole-dipole configurations, crucial for efficient 3D dataset acquisition.

Enhancing data analysis, the system offers full waveform analysis throughout the entire injection cycle. This capability effectively reduces noise and unlocks time and frequency domain analysis for IP data (requires optional Full Waveform module). Furthermore, timeseries analysis allows for precise recording of voltage and current waveforms, enabling the determination of phase shifts at key harmonic frequencies.

Designed for operational convenience, the Syscal Terra utilizes easily removable Li batteries housed in a lower compartment, simplifying international transport. These batteries are suitable for cabin baggage, and for extended fieldwork, the transmitter (Tx) and receiver (Rx) can also be powered by external 12V car batteries.

Ensuring system reliability, the unit incorporates built-in test procedures and test plugs for easy verification of the Rx, Tx, switching boards, and external battery connections.

Expanding survey capabilities, the Syscal Terra can communicate and connect with other units via Wi-Fi, facilitating multi-unit deployments for large-scale data acquisition. This interconnected functionality proves invaluable when encountering obstacles such as roads or rivers. Individual Terra units with their imaging cables can be positioned on either side of the obstruction and configured to record data under a single, unified sequence, with one unit injecting current while the others measure seamlessly via Wi-Fi.

As with all Syscal systems from Iris Instruments, the acquired data benefits from quality control and filtering using Prosys III before advanced post-processing in industry-standard software packages like Res2DInv or Res3DInv.