Model 3430 Plus & 3440 Plus
ASPHALT SITE
This also applies to hardened concrete sites and soil.
NOTE
These directions also apply to taking a backscatter
measurement on soil.
✓
Locate a smooth site on the asphalt.
✓
Fill the voids on open mixes with sand or cement. The gauge
base must rest on the asphalt, not the fill material!
✓
Ensure that the gauge does not rock. To ensure accurate
readings, the gauge base must be completely in contact with the
test material. If the gauge rocks, then find a more suitable test
site. If taking a measurement around a core, the gauge may be
moved a few inches away from the core to level it.
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