Leica DIGICAT 100 Manuel De L'utilisateur page 24

How to Use the DIGICAT
Direction
Radio mode

After a sweep in Power mode, a second sweep/pinpoint in radio mode should be
undertaken, thereby maximising the detection process.
Once the area has been swept in power mode, it should be swept again in radio mode.
Metallic services running through the excavation site that are passing insufficient or no
power will not be located in power mode, but can represent a considerable risk if not iden-
tified before excavation starts. These services may be re-radiating low frequency long wave
radio signals which flow through the ground. These signals will tend to follow the line of
least resistance and therefore flow along any conductive path, such as a metallic pipe that
offers lower resistance than the ground. When this happens a field is generated which can
be detected up by the DIGICAT in radio mode.
DIGICAT 100/200
1. To find the direction of a
pinpointed service, position
the DIGICAT directly over the
service.
2. Rotate the DIGICAT on it's axis
until the LED bar display drops
to a minimum.
3. The LED bar is now in line with
the service.
22