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Sonic Tracker and SAS Setup
Optional Smoothtrac SAS Placement and Setup
62
P-32+ and P-32 Operator’s Manual P/ N: 1001547-01
Positioning the SAS
The SAS should be positioned so the Sonic Trackers are 14 to 24 inches from the grade reference (Figure 109).
As with single tracker operation, the “lower the better” is a good rule of thumb for paving applications. This
helps to minimize the variable temperature conditions that can cause erratic signals. The beam does not have
to be perfectly level because each tracker averages the distance to the reference individually.
Figure 109: Positioning SAS
The trackers can be placed so all four are over the reference, or the back tracker can be set over the freshly laid
mat. The best method is the one you are presently using or the one in which you are most comfortable
(Figure 110).
Figure 110: Example Placement of SAS Trackers Over Reference
With SAS, be careful when the screed is raised that the front tracker does not hit the ground. If needed, the
tracker bracket can be temporarily folded back when raising the screed to keep the tracker from hitting
obstructions (Figure 111).
Advanced Grade Technology
AUTO
M
A
N
SURVEY
(CAL)
Advanced Grade Technology
System Four
AUTO
M
A
N
SURVEY
(CAL)
Advanced Grade Technology
System Four
Sonic Tracker II
Sonic Tracke r II
Sonic Tracker II
14 - 24
inches
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