Designed with both the transmitter and receiver within a single portable case, the terraTEM system is a reliable, convenient platform for completion of quality TEM soundings. The base system comprises a single console housing both a single receiver and a 15Amp 24V transmitter. A single battery pack for the 2 x 12V batteries is provided for powering the system, along with a 24V battery charger (240V). Power, transmitter, receiver and interface cables are included. Also included are a USB memory stick for data transfer, stylus for operating the touchscreen in hostile environments, and a CD containing all manuals and the data reduction program.
The user interface is controlled by a capacitive touchscreen with the ability to connect to an external mouse if preferred. The screen is a 15” LCD panel allowing for the clear display of acquired data and all acquisition parameters. Menus are clear and concise, which allows for rapid data acquisition with minimal time lost to learning a new system.
Standard software includes a comprehensive suite of diagnostic system information along with oscilloscope and single shot capabilities for quantitative assessment of ambient noise from the receiver. Data can be viewed in various formats depending upon user preferences. Also included as standard on the terraTEM are profile and decay plotting capabilities for in-field data review and quality control.
Available hardware options include expansion of the single receiver channel to a three channel system. This option allows for simultaneous sampling at 500kHz of three component transient data. The internal transmitter can also be upgraded for faster turn-off. An internal global positioning system (GPS) can also be fitted to provide location information for soundings. Further hardware options include an external 50A transmitter (terraTX-50) with either cable or GPS synchronisation. A three component downhole induction probe (VECTEM V) and a surface receiver coil (TRC-1 and TRC-3) are also available.
Software upgrades include continuous acquisition mode, signal averaging algorithms, digital signal processing and spectral analysis. The data processing can also be upgraded to include conductivity depth pseudosections. Contouring of gridded data and data editing can also be completed on the terraTEM. Saving of various displays for later insertion into reports is also available.