Model 3440
4
–
25
T
T
a
a
k
k
i
i
n
n
g
g
M
M
e
e
a
a
s
s
u
u
r
r
e
e
m
m
e
e
n
n
t
t
s
s
Soil Mode
The
Soil
mode is automatically selected when a Proctor value is
enabled (see page 3
–
9).
CAUTION
When not taking measurements, always keep the
source rod in the
SAFE
position. For added operator
safety, the source rod on the gauge automatically
retracts to the
SAFE
position when the gauge is lifted
by the handle.
If you do not hear a
click
when the gauge is raised to the
SAFE
position, look at the bottom of the gauge to verify that the
tungsten sliding block is completely closed. If the gauge base
opening is not completely closed by the sliding block, the block
may require cleaning. Refer to page D-10 for cleaning
instructions.
WARNING!
Do not store or transport the gauge unless the
sliding block is completely closed. Increased
radiation levels may violate transportation
regulations and cause excessive personnel
exposure.
The
Status
function (see page 3
8) allows you to view selected
information concerning the current gauge status and setup. To
access the
Status
function, press the
¢
STATUS
²
key. Check the
gauge’s current status before taking measurements.
Remember to take a standard count at least once each day the
gauge is to be used (see page 4
16). Note that some states may
require that a standard count be taken more frequently than
once per day.
Summary of Contents for RoadReader 3430
Page 14: ...1 6 Figure 1 Model 3440 Gauge and Accessories...
Page 19: ...Model 3440 2 3 Figure 2 Direct Transmission Geometry Figure 3 Backscatter Geometry...
Page 20: ...2 4 Figure 4 Backscatter Surface Density Effects Top Layer Effect Curves...
Page 22: ...2 6 Figure 5 Effect of Moisture on Depth of Measurement...
Page 164: ...F 2 STANDARD COUNT LOG Gauge Serial Number _____________ Date MS DS Date MS DS...
