LB 134
5. Contamination Measurements
39
5.1 Requirements for Contamination Measurements
5.1.1 Function Check
Turn the device on and make sure sufficient battery capacity is
available.
Warnings:
If the battery/rechargeable battery voltage displayed after
power on is below 4V for battery operation and below 4.5 V
for rechargeable battery operation, the remaining battery life
is 2-4 hours max.!
Eliminate this problem prior to measurement!
Slide the plate with the test source on the detector and read
the measured value after about 10 seconds. After this time,
a sufficient measuring accuracy is reached. You can also
use the System Test function of the PC program. You can
check if the measured value coincides with a target value
within a given limit.
Compare the measured value with the target value that is
specified on the test source for each detector type and the
selected source type. The device is working properly only if
your measured value is within the specified range of varia-
tion.
5.1.2 Measuring and Saving the Background
The background, the environmental radiation, is measured in
cps. It is automatically subtracted from sample measurements.
Gross and net values can be displayed on the screen.
Proceed as follows
Select
Background
on the
System Menu
. The background
parameters and the start option will be displayed.
Summary of Contents for LB 134
Page 2: ......
Page 6: ...LB 134 Content IV...
Page 8: ...LB 134 Working with the User s Manual VI...
Page 10: ...LB 134 Safety Instructions VIII...
Page 34: ...LB 134 2 System Description 24 Figure 2 9 LB 134 with wall bracket...
