D
–
16
G
G
a
a
u
u
g
g
e
e
U
U
s
s
e
e
P
P
r
r
e
e
c
c
a
a
u
u
t
t
i
i
o
o
n
n
s
s
The following precautions should be observed when
transporting, storing, maintaining, or operating the gauge.
i
Never touch the unshielded tip of the source rod with your
bare hands. The dose rates on contact with the source rod
tip can result in exposures exceeding the annual dose limits
to the skin of the extremities within a short time period
(about 1 hour).
i
When not taking readings, always keep the source rod in the
SAFE
(shielded) position. For added user safety, the source
rod automatically retracts to the
SAFE
position when the
gauge is lifted by the handle.
i
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 sliding block may require cleaning. Refer to page D
for cleaning instructions.
i
Do not store or transport the gauge unless the sliding block
is completely closed. Increased radiation levels may cause
excessive personnel radiation exposure and may violate
transportation regulations.
i
When preparing a test site, use the drill rod assembly to drill
the test hole. Under no circumstances should the source rod
of the gauge be used to drill holes.
i
Do not tamper with or modify the gauge. Also, do not
remove the sealed source from the gauge. Tampering with
or modifying the gauge or removing the sealed source can
be dangerous. Such actions are illegal unless authorized by
your radioactive materials license.
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...