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4.5
Process description for detection of radiation
sources.
Direction of maximum response
To detect hidden radiation sources, the dose rate alarm thresh-
old must be set to the lowest value, that does not produce fail
alarms. This is typical a value of 30 μR/h to 50 μR/h.
Due to it's almost 100 times higher efficiency, the RadEye
PRD is more suited for this task, than the SENTINEL Rad-
Eye G.
Subsequently, the operator passes the object while keeping
thereby the distance between the monitor and the object to be
checked as small as possible.
With an alarm occurring, the operator should move the in-
strument while observing the display in order to localize the
position of the source. Please note, that the alarm can occur up
to a few seconds after passing the nearest distance to the
source.
If the alarm disappears after a few seconds, this alarm is to be
considered as a statistically released false alarm.
In case a radiation source has been detected, the radiation in-
tensity is indicated. (see chapter 3.2).
SENTINEL RadEye G
Iw/Pi/Ff 30.07.08
DB-059-060324 E
4-5
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