ASPHALT MODE
To measure the density of asphalt (and hardened concrete of 4
inches or more) follow the steps below:
✓
Select the Asphalt mode (see page 3–15).
✓
If desired, enter or enable the Marshall value and/or voidless
density value as described in Chapter 6.
✓
Prepare the test site as described on page 4–9.
✓
Place the gauge on the test area.
✓
Lower the source rod to the backscatter position (just below the
SAFE position). Release the trigger. Gently push the handle
down to lock the source rod into position. You should hear a
click when the source rod locks into position.
✓
Press the 〈START〉 key.
In the Manual depth mode (see page 5–4), the gauge
prompts for the source rod depth. Enter the source rod depth
using the number keys. For example, with the source rod in
the backscatter position, press
〈0〉. Then, press
〈ENTER/START〉.
In the Automatic depth mode (available only on the Model
3440 Plus), the gauge software determines the source rod
depth automatically.
✓
The gauge displays the time remaining while taking a
measurement.
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