The electronics are microprocessor-based for ease of setup and reliability. Status LEDs indicate count-cycle status. Audible signals accompany the LEDs for additional indication. Detector counts, background, and all parameters may be viewed on the Liquid Crystal Display (LCD). All setup is accomplished by way of pushbuttons located below the LCD.
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 stop-and-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.
The Model 52-5 is able to operate from 85-250 Vac 50/60Hz without a voltage selector switch. They may also be operated from 3 “D” cell batteries. Battery lifetime is approximately 24 hours.
The portal monitors of the Model 52 series, including Model 52, Model 52-1, Model 52-5, Model 52-6, and versions thereof, are supplied with a polypropylene weather sleeve to protect against wet weather conditions.
- 61 cm (24 in.) Wide Opening
- Plastic Scintillator Side & Foot Detectors
- Sets Up In Minutes
- Easy to Operate
- Wheeled Transport Case
- Meets FEMA-REP-21
- Includes Sleeve for Weather Protection
INDICATED USE: Portable personnel monitoring (primarily beta/gamma sensitive) is designed for ease of transport, can be assembled or disassembled in less than five minutes, and includes a carrying case.
- ENTER/CHECKING: (green LED) indicates system is ready for use. Flashing LED indicates a count is in progress.
- INCOMPLETE/UPDATING: (amber LED) indicates the user has stepped out of the portal before counting was completed or that an update is in progress.
- ALARM: indicated by red LED and audible signal (greater than 60 dB at 61 cm [24 in.])
- FAILURE: (red LED) indicates a high or low background
DETECTORS: plastic scintillators, 4 ea. 2.75 L (168 in³) on sides plus 1 ea. 1.8 L (108 in³) for feet