Troxler 3430-M, Manual Of Operation And Instruction

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3-12
SITE PREPARATION/GAUGE POSITIONING
Preparation of the test site surface is critical to gauge performance.
This section provides site preparation procedures for both soils and
base courses and asphalt surfaces. To ensure the most accurate
gauge readings, the appropriate preparation procedure should be
followed.
SOIL AND BASE COURSE PREPARATION
✓
Since soil surface conditions are critical to accurate
measurements, locate a level site free from any large holes,
cracks, or debris.
✓
Smooth the surface by moving the scraper plate in a back and
forth motion. Filler such as fine sand may be used to decrease
the surface voids.
NOTE
Use only enough filler to fill the voids. Too much filler
will cause an error in the measurement.
✓
For direct transmission measurements, put the drill rod through
the extraction tool and then through one of the guides on the
plate (see Figure 3-4).
Figure 3-4. Drill Rod Positioning