LB 124 Scint 5. Contamination Measurements
35
Measuring the Area Activity
Start the measurement by selecting the desired measurement
mode (Ratemeter, Scaler-Timer ...) on the System Menu, and
then Start.
• First, set the desired measurement channel (type of radia-
tion) by pushing the Info/Mod
key (long): Display of
the α-, the βγ- or both measurement channels at the same
time.
• Then select the nuclide to be measured:
- If only one measurement channel is displayed, push the
Nuclide key
repeatedly until the desired nuclide ap-
pears in the second line of the display.
- If both measurement channels are displayed, push the
Nuclides key
first. Then the function of the softkeys
changes. Now you can set the α- and the βγ-nuclides sep-
arately by pushing the α
or βγ key.
Figure 17: Nuclide selection for simultaneous
α
-/
βγ
-measurement
In the selected measurement mode (Bq/cm²), the count rates
detected (cps) are converted into area activities with the help of
a calibration factor stored in the device (Bq/cm²). The back-
ground value that you have stored will automatically be sub-
tracted, so that the indicated results are always net area activi-
ties.
Press the Info softkey to view further information on the current
measurement on the display (see chapter 4.2).
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