Leica Digisystem i780231 Manuel De L'utilisateur page 54

Digisystem, How to Use the Sonde

Tracing a "walk
through" sewer
3. Depth indication (550i & 650i))
Depth indication can be used with a suitable depth locator. The locator must be posi-
tioned directly over the Sonde and in line with it (rotate the locator on its axis to find
the highest reading). Press and hold the i Button for 2 seconds. The depth of the Sonde
will be displayed in the depth readout window and the Sonde mode icon will be visible
beneath the display.
• For ease and convenience mark the ground every 3 to 4 metres.
• For ease of use practice the process above ground

If a "walk through" sewer is being
traced, another method is to place the
Sonde vertically, for example to
pinpoint a buried manhole. The
Locator will pick up a pool of signal
with a null point at the centre. This is
an accurate method, but it is essential
to ensure the Sonde is vertical.
53