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Sonic Tracker and SAS Setup
Optional Smoothtrac SAS Placement and Setup
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P-32+ and P-32 Operator’s Manual P/ N: 1001547-01
Optional Smoothtrac SAS Placement and Setup
Topcon's Smoothtrac® Sonic Averaging System (SAS) is a non-contacting averaging system that uses multiple
Sonic Trackers (ST-3 or Sonic Tracker II ) to smooth out the bumps and dips in a mat surface (Figure 104). The
non-contacting design allows full maneuverability of the paver when turning around, backing up or passing over
obstacles without lifting or removing the beam. The screed man can adjust mat thickness on the Slope Sensor
while standing on the screed. The Smoothtrac is mounted to the tow arm of the paver, and connects to your
Topcon P-32+ or P-32 System with the same coil cord used for the Sonic Tracker.
Figure 104: Smoothtrac SAS
When mounting the SAS to the paver, follow these simple steps:
1. If the ski is in pieces, connect them together (Figure 105).
Figure 105: Connecting SAS Pieces
2. Next, mount the L-bars to the brackets on the tow arm. The outside L-bar can be attached so it points up
or down. The position depends on how tall the tow arm is off the ground.
For pavers with a tall tow arm, mount the L-bar in the downward position.
For shorter tow arms, mount in the upward position.
Place locking collars on the bars and adjust so they are parallel with one another before tightening with an
Allen wrench. This allows the ski to move freely when adjustments need to be made without falling off.
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