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Sonic Tracker and SAS Setup
Working Window and Sonic Footprint
44
P-32+ and P-32 Operator’s Manual P/ N: 1001547-01
If the screed and the Sonic Tracker I I start to raise, the watch stops at a longer time (Figure 74). The Tracker
and Control Box indicates a down correction arrow, and lower hydraulic valve corrections are applied to bring
the Tracker back to On-Grade.
Figure 74: Sonic Tracker above Grade
If the screed and Sonic Tracker I I are lowered, the watch stops at a shorter time (Figure 75). The Tracker and
Control Box indicate a raise correction arrow, and raise hydraulic valve corrections are applied to bring the
Tracker back to On-Grade.
Figure 75: Sonic Tracker Below Grade
If the Sonic Tracker I I is side shifted off a stringline, the sound waves reflect off the ground and the Tracker's
stopwatch indicate a longer time (Figure 76 on page 45). The Tracker is out of the Working Window, and no
On-Grade corrections are applied.
Sonic Tracke r II
Son ic Tracke r II
On
Grade
STOPWATCH
Sonic Tracke r II
Son ic Tracke r II
STOPWATCH
On
Grade
Sonic Tracke r II
Son ic Tracke r II
On
Grade
STOPWATCH
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