Model 53

Gamma Portal Monitor

Part Number: 48-3784

Features

• Large plastic scintillator detectors for optimized detection efficiency
• Fast Alarm/Fast Clean counting technology for shorter counting cycles
• Customized voice prompts - user adjusted
• Three counting modes to maximize throughput, maximize sensitivity, or fix the count time
• Four user modes: Walk-Thru, Pause, Pause-and-Turn, Front-and-Back
• Automatic background updating
• Recount and contaminated detector check options
• Individual detector and sum channel alarms
• Informative 22.9 cm (9 in.) color touchscreen LCDs at ingress and egress
• PIR (Passive Infrared) sensor to sense personnel approach
• Photoelectric sensor to detect personnel presence
• Two levels of password security
• 2.5 cm (1 in.) thick lead shielding, with option for 5.1 cm (2 in.)
• Single Board Computer (SBC) running Windows™ Operating System
• Additional USB (Universal Serial Bus) connectors to transfer information from the system, or for input of user ID etc.
• Ethernet connectivity
• Option for implementing transmission factors according to user's weight
• USB port for printer-free operation & calibration

The Model 53 Gamma Personnel Portal detects gamma radiation in or on personnel passing through the portal from either direction. This highly sensitive portal uses eight large plastic scintillation detectors. Shielding is accomplished with either the standard 2.5 cm (1 in.) or optional 5.1 cm (2 in.) thickness of lead. A user-friendly interface guides personnel through the portal monitor via automated voice prompts, and is accompanied with 25.7 cm (10.1 in.) color LCD articulating screens presenting the instrument readiness and status at the ingress and egress. Alarms are manifested both audibly and visually, and can be silenced and acknowledged via control buttons located on either side of the instrument.

Three statistical counting modes are available to maximize throughput, maximize sensitivity, or fix the count time. Several modifiable parameters adjust the alarm set point, including the false alarm probability, detection probability, background sigma coefficient (K_B), and the composite sigma coefficient (K_S+B). Fast alarm and clean options provide the ability to quickly determine if personnel are contaminated or clean before the entire count cycle has ended.

There are also four user modes to choose from that include a walk-through mode, a pause mode, a pause-and-turn mode, and a front-and-back mode. Voice prompts may be customized in any language for each of these modes. These prompts can, for example, dictate in-house procedures to follow. Instrument technicians have password-protected access to set up the instrument, and to the advanced automated routines for calibrating and verifying operation.

Easily accessible USB ports facilitate connecting a keyboard to implement changes, input user ID, or upload revised software. The system also includes an Ethernet link. Ludlum's optional Universal Network Software can be used to log instrument status, user activity, and other information from one or more instruments connected to the network. This software broadcasts emails whenever radiological alarms or instrument failures occur, and has the ability to capture images from network cameras that can be stored along with the user ID (if implemented). See the "Options" tab for more information and other available options.

• Specifications
• Options
• Documents

• Specifications
• Options
• Documents

Specifications

Indicated Use	Gamma personnel monitoring
Detectors	8 identically-sized plastic scintillators (3 on each side, one overhead, one under feet) Scintillator Type: EJ-200 Size (H x W x L): 48.26 x 48.26 x 5.08 cm (19 x 19 x 2 in.) Volume: 92.7 L total (5655 in3) Shielding: 2.5 cm (1 in.) standard, 5.1 cm (2 in.) optional
Sensitivity	Walk-Thru Mode: will detect 50 nCi (1850 Bq) of 137Cs and 22.5 nCi (830 Bq) of 60Co Two-Step Mode: will detect 10 nCi (370 Bq) of 137Cs in 17 seconds and 10 nCi (370 Bq) of 60Co in 8 seconds (front-and-back mode)
Operation	Bi-directional User Modes: Walk-Thru, Pause, Pause-and-Turn, Front-and-Back Counting Modes: Maximized throughput, Maximized sensitivity, or Fixed count time Status Conditions: Ready, Clean, Counting, Alarm, High alarm, Failure, Updating background, Extending background, Initializing, Contamination check, Contaminated Voice Prompts: Can be customized to any language and in-house procedure
Controls/Displays	Displays: Dual 25.7 cm (10.1 in.) color touchscreen LCDs mounted to an articulating arm for optimized viewing, one on ingress, the other on the egress side Alarm Acknowledge: Single button on the ingress/egress sides that silence and clear any alarm Portable Keyboard: USB plug-in keyboard with convenient mounting bracket to facilitate setup, parameter editing and calibration functions, included with instrument (optional mounting shelf available, PN 4381-300) Light Stack / Audio Annunciator: Green (operational), Yellow (warning), Red (alarm) lights display instrument status, audio output is 70 to 85 dB at 1 meter, mounted to either the ingress or egress sides (egress standard), a second light stack is available as an option
Electronics	Central Processor: Single Board Computer (SBC) running Windows™ Operating System Detector Signal Conditioning: Ludlum's single detector board technology located on each detector assembly Proximity Sensors: PIR (Passive Infrared) sensor to sense personnel approach; Photoelectric sensor to detect personnel presence USB Ports: 2 on ingress side for connecting plug-in keyboard or user ID devices Ethernet Connection: Supports centralized and distributed viewing of instrument operation. Optional Ludlum Universal network software connects several Ludlum instruments (including different types) to a common radiological network for performing data logging, remote alarm notification, email notification, and image capturing upon an alarm.
Temperature Range	0 to 50 °C (32 to 122 °F)
Power	85 to 250 Vac, 50/60 Hz
Construction	Carbon steel construction with ivory powder coat, forklift slots in base
External Dimensions (H x W x L)	217 x 87.3 x 76.1 cm (85.5 x 34.4 x 30 in.), Ramp extends 43.2 cm (17 in.) per side, LCD monitors protrude 14.6 cm (5.75 in.) per side
Portal Inside Dimensions (H x W)	196 x 62 cm (77.1 x 24.4 in.)
Portal Step	10.2 cm high (4 in.)
Detector Doors/Covers	15.2 mm (0.06 in.) aluminum
Weight	With minimal lead shielding: 545 kg (1200 lb) With 2.5 cm (1 in.) lead: 1207 kg (2660 lb) With 5.1 cm (2 in.) lead: 1730 kg (3815 lb)

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Options

Option	Description	Part Number
Ludlum Universal Software	Collects and displays radiation levels and alarm status from multiple Ludlum instruments, including area monitors, sample monitors, and portal monitors. The instrument must be equipped with Ethernet interface. Using this interface, the area instrument can be connected to the network allowing for real-time monitoring of radiation data, email alerts, and database logging. A standard web browser is used to view the current status and query the data.	1370-093
Additional Lead Shielding	Additional 2.5 cm (1 in.) lead shielding (for a total 5.1 cm (2 in.) shielding thickness)	4540-257
Additional Light Stack	Light stack with red, yellow, and green indicator lights.	4540-1208-1

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Documents

• Model 53 Data Sheet (current version)
• Model 53 Data Sheet (units shipped prior to 2010)
• Product Manual (current version)
• Product Manual (units shipped prior to 2010)
• CE Certificate 

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