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Model 3440
7
–
9
T
T
r
r
e
e
n
n
c
c
h
h
O
O
f
f
f
f
s
s
e
e
t
t
To use the gauge in a trench or within 0.6 m (2 ft.) of a large
vertical surface, first perform a
trench offset
. The trench offset
adjusts all moisture measurements and density measurements
from backscatter to 4 inches. For direct transmission
measurements over 4 inches deep, the gauge will only adjust the
moisture measurements. In the displays shown below,
M
refers
to
trench moisture offset
;
D
refers to
trench density offset
values.
NOTE
Before determining a new
trench offset, ensure that a
standard count has been performed recently
outside
the trench.
To access the
Trench Offset
menu, press
¢
3
²
at the
Offset
menu.
The gauge displays:
Trench Offset
M: # D: #
1. Enable 2. Disable
3. Change Offset
The gauge displays the current offset values on the second line.
f
To enable the displayed trench offset, press
¢
1
²
. The gauge
enables the offset, displays a brief confirmation message,
and returns to the
Ready
screen.
f
To disable the trench offset, press
¢
2
²
. The gauge disables
the offset, displays a brief confirmation message, and
returns to the
Ready
screen.
NOTE
The trench offset is also disabled when the gauge is
turned off.
Содержание RoadReader 3430
Страница 14: ...1 6 Figure 1 Model 3440 Gauge and Accessories...
Страница 19: ...Model 3440 2 3 Figure 2 Direct Transmission Geometry Figure 3 Backscatter Geometry...
Страница 20: ...2 4 Figure 4 Backscatter Surface Density Effects Top Layer Effect Curves...
Страница 22: ...2 6 Figure 5 Effect of Moisture on Depth of Measurement...
Страница 164: ...F 2 STANDARD COUNT LOG Gauge Serial Number _____________ Date MS DS Date MS DS...