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FLIR Detection
3. Field Operating Guide
Figure 67.
Optimum posture for neutron detection
For tests involving un-moderated neutron sources, a
30 cm × 30 cm × 15 cm
PMMA phantom
(Figure
, p.
) or equivalent must be placed between the source and the detector in the
FLIR identiFINDER R300 (Figure
238
, p.
241
) in order to provide adequate moderation of fast
neutrons and to simulate the ield operation instructions given here.
3.3
Locating a Radiation Source
Once you suspect the presence of a radiation source from observing the environment, you should
use the FLIR identiFINDER R300’s Finder Mode (
, p.
) to determine the exact location of the
source.
Ô
To locate a radiation source
…
1. Move the instrument to a low-radiation position for a background measurement.
2. Press
L
Finder
to switch from Dose Rate Mode to Finder Mode.
3. Wait until the FLIR identiFINDER R300 inishes the background measurement (Figure
68
,
p.
74
).
If you are in a hurry, you can
R
Exit
the background measurement (not recom-
mended). The instrument will use the most recent background taken after it was
switched on.
4. Move the instrument around to ind the radiation source.
identiFINDER
®
R300/en/2014.4(13623)/Feb2015
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