Tracker and SAS Placement
Topcon Paver System Five Operator’s Manual
6-6
Placement When Using a Temperature Bail
Temperature and atmospheric conditions will have an effect on
the speed of sound. In paving applications, you can get a
dramatic and rapid change in air temperature. A temperature
bail is attached to the tracker to compensate for these
variations. If you are on a job where there are high winds and/or
large temperature fluctuations, lower the tracker closer to the
reference (Figure 6-6).
Figure 6-6. Temperature Conditions and Tracker Placement
Placement When Using a Mechanical Ski
If using a mechanical ski with an elevated string or wire, make
sure the string/wire reference is a minimum of 4 inches above
the ski (Figure 6-7 on page 6-7). When paving with a
mechanical ski through super elevations, the ski will tend to
pull away from the paver and may even tip to one side.
Elevating the string at least 4" will ensure the ski stays out of
the working window.
Also, remember to place the tracker in the center of the ski to
maximize the averaging length. If using a 30' ski, the sensor
should be placed 15' from the end of the ski. For every 1'
positioning error from the center of the ski, you lose 2' of
effectivity of the ski. For example, if the sensor is moved
foreword or backward 2 1/2' (12 1/2' from the end) you are
using a 25' ski.
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