Ludlum Model
53
Personnel Gamma
Radiation Portal Monitor
Features
-
Large
plastic scintillator radiation detectors for optimized detection efficiency
-
Fast
Alarm/Fast Clean counting technology for shorter counting cycles
-
Customized voice prompts
-
Three
counting modes to maximize throughput, maximize sensitivity, or fix the
count time
-
Three
user modes: Walk-Thru, Pause, Pause-and-Turn
-
Automatic background updating
-
Recount
and contaminated detector check options
-
Individual detector and sum channel alarms
-
Informative 9 in (22.9 cm) color LCDs at ingress and egress
-
PIR
(Passive Infrared) sensor to sense personnel approach
-
Photoelectric sensor to detect personnel presence
-
Two
levels of password security
-
1 in
(2.5 cm) thick lead shielding, with option for 2 in (5.1 cm)
-
Single
Board Computer (SBC) running Windows XP 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
Introduction
The
newly designed Ludlum Model 53 Personnel Gamma Radiation 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, and is shielded with either the standard 1 in (2.5
cm) or optional 2 in (5 cm) of lead. A user-friendly interface guides
personnel through the portal monitor via automated voice prompts, and is
accompanied with 9 in (22.9 cm) 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 a control button 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 (KB), and the composite sigma
coefficient (KS+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.
Operational
modes include a walk-through mode, a pause mode, and a pause-and-turn 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).
A
unique feature, not found anywhere else, is an optional weight scale that
assesses the weight of the individual passing through the portal and then
assigns an appropriate transmission factor for a more accurate gamma
measurement. Other options include an additional 1 in (2.5 cm) of lead
shielding, a second alarm/light stack, and the Universal network
software.
Specifications
PART NUMBER: 48-3151
INDICATED USE:
gamma personnel monitoring
RADIATION DETECTORS:
8 identically-sized plastic scintillators (3 on each side, one overhead, one
under feet)
Scintillator Type:
EJ-200
Size: 19 x
19 x 2 in (48.26 x 48.26 x 5.08 cm) (H x W x D)
Volume: 5655 in³
total (92668 cm³)
Shielding: 1 in
(2.5 cm) standard, 2 in (5.1 cm) optional
SENSITIVITY:
will detect between 10-100 nCi depending upon the background, isotope, and
the selected operational mode, count time, confidence level etc.
OPERATION:
bi-directional walk through
Operating Modes:
Walk-Thru, Pause, Pause-and-Turn
Counting Modes:
maximized throughput, maximized sensitivity, or fixed count time
Status Conditions:
ready, door open, clean, counting, alarm, high alarm, failure, updating
background, extending background, initializing, contamination check,
contaminated
Voice Commands:
can be customized to any language and in-house procedure
CONTROLS/DISPLAYS
Displays: dual 9
in (22.9 cm) color screen 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
Light Stack/Audio Annuciator: green
(operational), yellow (warning), red (alarm) lights display instrument
status, audio output is 70-85 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 XP
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
Interfaces:
USB Ports: 2 per
side (ingress/egress) 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.
MECHANICAL:
Construction:
aluminum construction with ivory and brown powder coat paint
External Dimensions: 86 x 34.5 x 30 in (205.7 x
94 x 53.3 cm) (H x W x L), ramp extends
17 in (43.2 cm) per side, LCD monitors protrude 5 in (12.7 cm) per side
Portal Opening Dimensions: 77 x 24 in (195.6 x 61 cm) (H x W)
Portal Step: 4 in
high (10.2 cm)
Detector Doors/Covers:
0.060 in (15.2 mm) aluminum
Weight:
less lead shielding: 635 lb (288 kg)
1 in (2.5 cm) Pb: additional 1600 lb
(726 kg)
2 in (5.1 cm) Pb: additional 2800 lb (1270 kg)
TEMPERATURE RANGE:
32 to 122 °F (0 to 50 °C)
POWER:
85–250 Vac, 50–60 Hz
Technical Information
Units shipped 2010 and after (part Number: 48-3784)
Units shipped 2009 and earlier (Part Number: 48-3151)
Other Ludlum Products
Ludlum Information
For more information or to request a quotation,
please contact us
by phone at: (865)
947-5123 or by email at:
sales@deqtech.com.
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