FLIR identiFINDER R200, Руководство пользователя

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4.2 Finder
4.2 Finder
There are two basic aspects to the FLIR identiFINDER R200 when placed in "Finder" mode: Finder Back-
ground and the Control Limit.
"Finder Background " is ini-
tially displayed on the desktop
and is an important step in col-
lecting radiological data.
When considering background
radiation, it is important to be cog-
nizant of the proximity of the
FLIR identiFINDER R200.
Determining Background radi-
ation is a sort of sampling of the
area in which the detector will be
used.
One must remember that if
moving through a large area (say
a city block, or an office build-
ing), background levels will
change as the detector is intro-
duced to new areas.
When seeking a source that is
foreign to the area, that source
"stands out" against the back-
drop of ambient, or normal radi-
ation surrounding it which was
measured in "Background
Finder" mode.
The two "peaks" in the Cobolt
60 example stand out against
the background which was depic-
ted in the previous plot, indic-
ating a source that is not a part of
the normal background.
Finder Background
As described at left, it is used to establish
a baseline for the normal radiation levels
in existence in an area to be scanned for
a source not normally located there. It is
very important to establish this.
Control Limit
The current count rate is represented by
the vertical arrow, and the control limit by
the horizontal dotted line.
When the count rate exceeds this control
limit (the dotted line), the FLIR
identiFINDER R200 displays graphically
the data peaks when they cross this dot-
ted line.
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