Figure 5: Mobile ring is removed
|| • The outer cylinder (to
protect the weighing system) is put on top of the foundation.
• The pit is backfilled horizon by horizon and
compressed by a rattling device to a level 60 cm below the
• A wooden ring to prevent soil from trickling in is
• The mobile ring (35 cm depth) of the inner cylinder
is removed (see figure 5) and the topsoil is backfilled.
Vessels have to be surveyed exactly!