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4 Operational use
4.1 Software and field operations
A full description of the operational use of the C-ALS HD hardware is included in the separate Carlson Scan
software and operations manual. A full account of the software installation and operation is provided, along with a
step-by-step field operation guide.
4.2 System limitations
4.2.1 Environmental protection
The C-ALS HD is waterproof up to a depth of 1 m. It can move mechanically in waterlogged environments but will
not produce data in these circumstances.
The surface unit is not watertight when its lid is open. It is thus advisable that the lid should be closed once the unit
has been switched on.
If the probe is being deployed through a borehole, it is recommended that the hole should be lined to reduce wear
and tear on the unit and to reduce any flow of water over the unit.
4.2.2 Sensors
A gyro is installed in the C-ALS HD unit. These sensors ensure that the probe can be tracked during its deployment
from the known collar coordinates to the scan location. The sensors also correct the alignment and inclination of all
data when the probe is inclined during a scan.
Figure 39 Carlson Scan software
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