Preparation of trenches
Page 100 OmniTrax Product Guide
Narrow cable spacing (single trench)
1. For narrow cable spacing (10 to 15 cm) dig one trench 15 cm (6 in.) wide X 23 cm (9 in.) deep.
2. Carefully lay the sensor cables in the trench at the specified cable spacing.
3. Pull the cables taut and partially backfill the trench with 7.5 cm (3 in.) of soil as you go to hold
the sensor cables in place and ensure the cable spacing remains consistent.
Figure 60: Narrow cable spacing installation tool
Figure 61: Trench dimensions for narrow spacing (single trench)
handle
carriage bolts (X2)
wing nuts (X2)
removable
retaining block
fixed spacer block
fixed bottom
sand backfill
installation tool
sensor cables
coarse gravel
soil from trench
soil from trench
23 cm
(9 in.)
15 cm (6 in.)
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