These portal monitors can be operated in a walk-through basis with a quick scan occurring while a person is positioned within the portal. In this mode, checking is performed every 200 milliseconds while the portal is occupied, 600 milliseconds before and 600 milliseconds after the portal is occupied. The portal monitor can also monitor in a stopand-count mode, allowing for a more sensitive scan. In stop-and-count mode, the fixed count time may be set from 1 to 20 seconds. These instruments have automatic background update and dynamic alarm setting capabilities. On startup, the instrument will take a background count and calculate alarm levels for each detector. Self-diagnostic routines check the background count and warn if the background becomes either too high or too low. Alarms are calculated with a user-adjustable sigma parameter and the current background count. During setup, the user can also specify individual alarms only, sum alarm only, or both individual and sum alarm. The sum alarm groups upper detectors and lower detectors.
- 61 cm (24 in.) Wide Opening
- Plastic Scintillator Side Detectors
- Sets Up In Minutes
- Easy to Operate
- Wheeled Transport Case
- Meets FEMA-REP-21
- Excellent means for detecting surface contamination