Thermo Interceptor, Руководство пользователя

Страница: 42 / 170

3. Operating the I
NTERCEPTOR
™
Warning If Dose Rate mode reaches the gamma warning level, the gamma
alarm level, or sigma alarm level (see section 4.12.1 , p. 77 ), the background of
the Dose Rate window will change color from green to yellow (warning), red
(alarm), or orange (sigma). See section
4.12 , p. 74 for additional information.
s
Warning
The device will also describe the source as a “High Energy” or
“Low Energy” source. The “High Energy” description is displayed when-
ever the ratio of the detected counts above an energy threshold to all of the
detected counts above 40 keV is greater than 40%. The “Low Energy” alert
is displayed if this ratio is smaller than 10%. Should this ratio fall between
“High Energy” and “Low Energy” levels, the device describes the source as
“Balanced”.
s
3.2.2 Nuclide Identification (ID) Mode (Optional)
Warning
This mode is optional depending upon the hardware capability of
the I

™. s
In ID Mode, the I

™ acquires a spectrum and attempts to iden-
tify a radioactive isotope by comparing the measured spectrum with spectral
templates stored in the internal library. Pressing the
ACTION
button starts
the identification process. Cancel the identification by pressing the
POWER
or
MODE
button.
Warning While in ID mode, the I

™ will NOT automatically
switch to Unattended Surveillance Mode after 90 seconds! s
The estimated time remaining for identification is constantly updated and
displayed on the screen. The minimum time to ID can be set using the PC
software and can range from 10s to 300s. The factory default minimum time
to ID is 60s. The minimum time to ID is only e
ff
ective after the appropriate
number of counts have been obtained in the spectrum. For example, if the
26 Interceptor™/en/5.1(4956)/Feb2010 ICx Technologies