ORTEC Detective X, Руководство пользователя

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ORTEC
®
Detective
®
X Handheld Radioisotope Identifier 1107231N / 082020
36
exposure rate, the HPGe detector’s dead time is so high that it cannot efficiently generate nuclide IDs.
Neutron Over-range alarms are triggered only when the neutron detector is installed, and at a neutron
exposure rate greater than 1000 nps/cm 2 .
CAUTION Neutron exposure rates in excess of this value will permanently degrade resolution
of the HPGe detector after several hours.
The appropriate action in either case is to move away from the source to a point where the alarm is no longer
triggered. Recovery from an overrange alarm is immediate; as soon as the distance is increased from the
Detective X to the source enough that the overrange message disappears, the unit returns to
READY
status.
The alarm message
Warning! Over-Range!
(Figure 45) is accompanied by short-duration audio and
vibratory alarms (if enabled). The alarm also shows up as a red threat ID in both Detect and ID Modes.
Figure 45. Over-Range Condition
If the unit is configured to require alarms to be acknowledged, a
Detector Over-Range Alarm!!!
message
will overwrite the IDs Box (Figure 46) and latch the condition. Audio and vibratory alarms (if enabled) will
persist until the Acknowledge button is tapped.
The user may then have to return to the Detect Mode screen to silence the alarm by acknowledging the
condition. Once acknowledged, the
Warning! Over-Range!
message in the header will persist as long as
the condition exists.