Model 3430 Plus & 3440 Plus
SOIL MODE
To measure the moisture and density of soil, soil-stone aggregate,
and similar materials, follow the steps below:
✓
Select the Soil mode (see page 3–15).
✓
If desired, enter, change, or enable the Proctor value as
described in Chapter 6.
✓
Prepare the test site as described on page 4–7.
✓
Place the gauge on the test area.
✓
Insert the source rod into the hole made by the drill rod. Use
care when inserting the source rod. Try not to disturb the soil
around the hole.
✓
Lower the source rod to the measurement depth. 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.
✓
Gently slide the gauge to the right (towards the keypad) so the
source rod makes contact with the wall of the hole.
✓
Press the 〈ENTER/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.
Note that the Proctor value is based on soil particles 3/8
inches or less in diameter (or those passing a #4 sieve). If an
unusual reading is obtained and oversize particles are
suspected, rotate the gauge 90°. Use the same drill hole to
take a second reading.
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