ORTEC Micro-Detective-HX, Руководство по эксплуатации

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ORTEC Micro-Detective
®
-HX Human Portable Radiation Detection System — Operation Manual
66
A.4. Clear Data
This command permanently deletes all survey data files from the memory card. To do this:
!
From the Home screen, navigate to Main Menu,
Advanced (password), Other, and select Clear Data
(Fig. 55). Answer Yes to continue with deletion. There
is no undo for this operation. (Do not manually delete
the survey files; doing so may disrupt the HX software.)
A.5. LCX (Low-Confidence Expert) Identification Mode
Users with password access can enable LCX Mode from the Options menu. The LCX identi-
fication mode displays suspected threat alarms and identifications at an approximately 30%
lower confidence level than the normal mode. This results in more hits on suspected threat
nuclides. Although detection is arguably improved in LCX mode, the false alarm rate will
increase to a level unusable for many applications. Be aware that the HX will issue approxi-
mately two false suspect threat alarms every hour while in LCX mode. Therefore, we
recommend LCX mode only for experienced spectroscopists.
Figure 56 shows an example of a suspect identifica-
tion in LCX mode; compare with Fig. 4 on page 6. (Note
also that the confidence level of the ID is enabled in this
illustration; see page 28). In the standard identification
mode, the U-235 suspect ID would either not generate an
alarm because the confidence level is low (
L
), or would
post an
Elevated radiation or beta alarm
rather than listing
a specific radionuclide.
Fig. 55. Permanently Delete
All Survey Files.
Fig. 56. Suspect Identification in
LCX Mode.