OPTOTHERM Thermoscreen IS640 User manual

User Manual for
Thermoscreen IS640
Infrared Fever Screening System

Thermoscreen User Manual 2020-03-09 Page 1of 145
CE Declaration of Conformity
This is to certify that the Optotherm IS640 infrared camera has been designed and manufactured to meet the
requirements, as applicable, of the EU-Directive: 2014/30/EU Electromagnetic Compatibility and the following
harmonizing standards. The system consequently meets the requirements for the CE-mark.
EMC Specifications
The Optotherm IS640 infrared camera has been subjected to, and been shown to comply with, the EMC
(Electromagnetic Compatibility) tests listed below in accordance with the requirements of the following
specifications:
•IEC 60601-1-2 (4th Edition 2014 07): Medical electrical equipment – Part 1-2: General requirements for
basic safety and essential performance – Collateral Standard: Electromagnetic disturbances –
Requirements and tests
•EN 61000-6-1:2007: Electromagnetic compatibility (EMC) - Part 6-1: Generic standards - Immunity
standard for residential, commercial and light-industrial environments
•EN 61000-6-3:2007/A1:2011: Electromagnetic compatibility (EMC) – Part 6-3: Generic standards –
Emission standard for residential, commercial and light-industrial environments
•EN 61326-1:2013: Electrical equipment for measurement, control and laboratory use - EMC requirements
Part 1: General requirements
EMC Tests Performed
EN 55011:2009 - Radiated Emissions - Class B 30MHz - 1GHz
EN 61000-4-2:2008 - Electrostatic Discharge Immunity - 2kV, 4kV, 8kV, 15kV (Air), 8kV (contact)
EN 61000-4-3:2010 - Radiated Electromagnetic Field Immunity - 80MHz to 2.7GHz @ 10V/m 80% AM @ 1kHz
EN 61000-4-3:2010 - Proximity Fields from RF Wireless - 80MHz to 2.7GHz @ 10V/m 80% AM @ 1kHz
EN 61000-4-4:2012 - Fast Transient/Burst Immunity - I/O Lines (1kV)
EN 61000-4-6:2013 - Conducted RF Immunity - 3Vrms (150kHz - 80MHz)
EN 61000-4-8:2009 - Magnetic Field Immunity - 30A/m @ 50Hz & 60Hz

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Copyright
This manual is copyrighted by Optotherm, Inc. with all rights reserved. Under the copyright laws, this manual may
not be reproduced in any form, in whole or in part, without the prior written consent of Optotherm, Inc.
© 2020 Optotherm, Inc.
Disclaimer
Optotherm, Inc. has reviewed this manual thoroughly in order that it will function as an installation manual for an
Optotherm Thermoscreen Infrared Fever Screening system. All statements, technical information and
recommendations in this manual and in any guides or related documents are believed reliable, but the accuracy
and completeness thereof are not guaranteed or warranted, and they are not intended to be, nor should they be
understood to be, representations or warranties concerning the products described.
Specifications are subject to change without notice.
All information regarding non-Optotherm products was compiled from publicly available information. No
representation is made regarding the accuracy thereof.
Trademarks
Optotherm, Thermoscreen, Infrasight, and Thermalyze are trademarks of Optotherm, Inc. All other product and
brand names are trademarks of their respective owners.
Optotherm, Inc.
Tel [phone]
Fax [phone]
[email protected]om
www.optotherm.com

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Table of Contents
1 Introduction
1.1 Document Conventions
1.2 Defined Terms
1.3 Applications and Features
1.4 How It Works
1.5 Thermoscreen Accessories
1.6 Spring Singapore Requirements
2 Site Setup
2.1 Site Conditions
2.2 Site Design
2.3 Operator Training
2.4 Manual Screening (Individual)
2.5 Manual Screening (Continuous)
2.6 Automated Screening (Single)
2.7 Automated Screening (Multiple)
2.8 Automated Screening (Self)
3 Hardware Setup
3.1 Unpacking
3.2 Mounting the Camera Enclosure
3.3 Connecting and Testing the Camera
3.4 Mobile Computer Stand
3.5 Portable Screening Wall
3.6 Lens Focusing
4 Computer Setup
4.1 Overview
4.2 Camera Link Board Installation
4.3 GigE Board Installation
4.4 Matrox Installation
4.5 NI-UI Installation
4.6 Thermalyze Software Installation
4.7 Calibration Data Installation

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5 Key Concepts
5.1 Skin Offset
5.2 Fever Threshold
5.3 Measuring Internal Core Temperature
6 Thermalyze Software
6.1 Overview
6.2 File Menu
6.3 Setup Menu
6.3.1 Program Settings
6.3.2 User Preferences
6.3.3 Messages
6.3.4 Bad Pixel Replacement
6.4 Thermal Camera
6.5 Fever Screening
6.5.1 Visual Image
6.5.2 Screening Violations
6.5.3 Violation Review
6.5.4 Screening History
6.5.5 Height Scale
6.5.6 Fever Screening Setup
6.5.7 Screening Results
6.6 Regions
7 Software Setup and Operation
7.1 Capturing Thermal Images
7.2 Capturing Visual Images
7.3 Aiming the Camera
7.4 Excluding Background Objects
7.5 Person Detection
7.6 Measuring Skin Offset
7.7 Adjusting Skin Offset
7.8 Adjusting Fever Threshold
7.9 Fever Threshold Violations
7.10 Automated Screening Mode
8 Maintenance
8.1 Cleaning the Lens
8.2 Cleaning and Disinfection

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9 Appendix
9.1 Quick Start Instructions
9.2 Troubleshooting
9.3 Technical Support
9.4 Thermoscreen System Specifications
9.5 Infrared Camera Calibration
9.6 Software Warranty
9.7 Hardware Warranty

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Safety Information
Caution: The following paragraphs contain important safety information you must follow when installing
and operating the Optotherm Thermoscreen System. Do not operate the system in a manner not specified in the
documentation. Misuse of system components may result in a hazard and may compromise the safety protection
built into the system. If the system is damaged, turn it off and do not use it until service-trained personnel can
check its safety. If necessary, return the system to Optotherm for repair.
Keep away from live circuits. Do not remove equipment enclosures, covers, or shields unless you are trained to do
so. If signal wires are connected to the system, hazardous voltages can exist even when the equipment is turned
off. Disconnect all field power prior to removing enclosures, covers, or shields.
Because of the danger of introducing additional hazards, do not install unauthorized parts or modify the system.
Use the system only with the chassis, modules, accessories, and cables specified in the installation instructions. All
enclosures, covers, and shields must be installed while operating the system.
Do not operate the system in an explosive atmosphere or where flammable gases or fumes may be present.
Operate the system only in pollution-free environments. Pollution consists of any foreign matter—solid, liquid, or
gas—that may reduce dielectric strength or surface resistivity. The unit must be completely dry and free from
contaminants prior to operation.
ESD Precautions
Caution: Never touch the exposed pins of connectors.
The Optotherm Infrasight camera is shipped in an antistatic package to prevent electrostatic discharge from
damaging camera components. To avoid such damage in handling your camera, take the following precautions.
1. Before touching the camera, camera cables, or computer cables, ground yourself using a grounding strap
or by touching a grounded object, such as the chassis of a computer that is plugged in.
2. Before removing a camera from its antistatic package, touch the package to a grounded object, such as
the chassis of a computer that is plugged in.
3. Remove the camera from the antistatic package and inspect it for loose components or any other signs of
damage. Notify Optotherm if the camera appears damaged in any way.
4. Store the camera in the antistatic package when not in use.
Instructions for Use: Although the Optotherm Thermoscreen Infrared Camera is an accurate temperature
measurement device, it has not been tested or qualified as diagnostic medical equipment and should not be used
to diagnose any medical conditions. Additionally, Facial Skin Temperature varies with environment and
physiological factors and does not always accurately reflect Internal Core Temperature. Raised Facial Skin
Temperature can occur in the absence of fever and lowered Facial Skin Temperature can occur in the presence of
fever. After initial screening, individuals with elevated Facial Skin Temperature must be verified with a Medical
Thermometer.

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1 Introduction
1.1 Document Conventions
Software user interface fields, tools, controls, and menu items have their first letter capitalized
and are listed in bold type (for example, the Fever Threshold field, the Zoom In tool, the
Capture Images control, and the Filemenu).
Defined Terms have their first letters capitalized (for example, Skin Threshold).
File and folder names are listed in bold type (for example, Optotherm\Thermalyze\Images).
Keyboard keys are listed in bold type (for example, hit Enter).
Software window names are listed in italic (for example, the Fever Screening Settings window).
Source code is listed in courier typeface, with emphasized sections in bold type.

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1.2 Defined Terms
Note: All defined terms have the first letters capitalized throughout this manual.
Automated Screening Mode:A method of fever screening whereby subjects are detected when they
enter the Screening Zone and then are guided by audible messages through the Screening Process.
Thermalyze Software evaluates subject movement and face position prior to conducting a Screening
Measurement in order to minimize both Missed Detections and False Violations.
Automatic Skin Offset: A software setting that when operating in Automated Screening Mode, allows
Skin Offset to be automatically calculated to compensate for changes in ambient temperature and for
variations in the Internal Core Temperature due to Circadian Cycle effects.
Black-Body Calibration Source: An electronic instrument used for calibrating Infrared Cameras. The
primary component is a flat plate or cavity that has been coated with a high emissivity material (usually
black) that is controlled to a stable temperature, providing a consistent source of Infrared Energy.
Calibration Shutter: A flat surface that temporarily closes over the Infrared Camera detector so that an
Offset Calibration can be performed.
Camera Enclosure: An aluminum enclosure that houses and protects the Thermoscreen Radiometric
Infrared Camera and Visual Camera.
Camera Link: A serial communication protocol designed for computer vision applications.
Circadian Cycle (or Circadian Rhythm):Changes in biological processes (such as Internal Core
Temperature) that regularly occur over approximately 24-hour time intervals.
Face Detection:A software process in Automated Screening Mode whereby subject face position is
evaluated and the Screening Measurement is conducted only when the subject is facing the
Thermoscreen Infrared Camera at the designated Screening Distance.
Facial Skin Temperature: Using a Radiometric Infrared Camera, a surface temperature measurement
conducted on an area of the face, such as the inside corner of the eye.
Fail: A Screening Result wherein a Fever Threshold Violation occurred.
False Violation: Obtaining a Fever Threshold Violation even though a subject’s Internal Core
Temperature does not exceed the Internal Core Threshold.
Fever: Having a temperature above the normal range due to an increase in the body's temperature set-
point. There is not an agreed upon upper limit for normal temperature. Values commonly used range
between 37.5 and 38.3°C (99.5 and 100.9°F).

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Fever Threshold: A software setting that represents the Internal Core Temperature that indicates a
fever and is used solely as a convenience to operators in place of setting Skin Threshold. Note: This
setting is not intended to specify the actual Internal Core Threshold that is measured using a Medical
Thermometer.
Fever Threshold Violation: Occurs when Internal Core Estimate exceeds Fever Threshold resulting in a
Screening Result =Fail outcome.
FOV (HFOV): Field of view (horizontal field of view).
GigE: This is the third generation of Ethernet, the dominant global LAN standard protocol for
transmitting IP (Internet Protocol) packets (data, video, voice) over standard IP networks. The Ethernet
standard defines four data rates: Ethernet (10 Mb/s), Fast Ethernet (100 Mb/s), Gigabit Ethernet, or GigE
(1000 Mb/s or 1 Gb/s), and 10GigE (10,000 Mb/s or 10 Gb/s).
GigE Vision: This is a standard for video transfer and device control over Ethernet networks that uses
the applications programming interface (API) defined by the GenICam standard to access and control
features in compliant cameras and other imaging products.
Height Scale: A measurement scale that can be displayed on the Thermal Image to help position and aim
the Infrared Camera for screening a range of subject heights.
Image Processing Rate: The rate (in frames per second) that Thermal Images are processed within
Thermalyze.
Infrared Camera: A camera that forms a continuous sequence of images by detecting energy in the
infrared spectrum.
Infrared Energy: Electromagnetic energy with wavelength longer than visible light but shorter than
millimeter wave energy (from 700 nanometers to 1 millimeter).
Infrared Fever Screening: Measuring Facial Skin Temperature, usually near the inside corner of the eye,
using a Radiometric Infrared Camera in order to identify potentially feverish individuals.
Internal Core Estimate: A calculated estimate of Internal Core Temperature. Note:Internal Core
Estimate is used solely as a reference level for setting Fever Threshold and should not be regarded as a
measurement of Internal Core Temperature.
Internal Core Temperature:The temperature of structures deep within the body, as opposed to
peripheral temperature such as that of the skin.
Internal Core Threshold: The temperature threshold used by medical practitioners to indicate a fever
when using a Medical Thermometer.
LWIR: Long wavelength infrared electromagnetic energy usually in the range from 7 to 14 microns in
wavelength. LWIR energy is similar to normal light but has a longer wavelength. All objects, including
human skin, continuously emit LWIR energy. Objects with higher temperature tend to emit more LWIR
energy.

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Manual Screening Mode:A method of fever screening wherein subjects are screened as they walk by or
pause in front of the Thermoscreen Infrared Camera.
Medical Thermometer (or Clinical Thermometer):An instrument used for measuring Internal Core
Temperature wherein the tip of the thermometer is inserted into the mouth under the tongue.
Tympanic thermometers are also used to measure Internal Core Temperature by measuring the
temperature of the inner ear canal by infrared measurement.
Missed Detection:Obtaining a Screening Result =Pass outcome even though a subject’s Internal Core
Temperature exceeds the Internal Core Threshold.
Mobile Computer Stand: An aluminum pole mounted on wheels on which the computer, monitor, and
Camera Enclosure are mounted.
Movement Detection: A software process in Automated Screening Mode whereby subject face
movement is evaluated and if excessive, the Screening Measurement is prevented.
Offset Calibration: Compensation for variations in Infrared Camera detector response when the
detector is viewing a uniform temperature scene such as a Calibration Shutter.
Pass: A Screening Result wherein a Fever Threshold Violation does not occur.
Person Detection: A software process whereby subjects are detected based on their skin temperature
and heat signature.
Person Detection Temperature: A software settings that determines if a subject is in the Screening
Zone.
Pixel Spot Size:The measurement area that is imaged onto an individual camera detector pixel element.
PoCL: Power over Camera Link. A method of powering a camera by supplying power over the Camera
Link cable.
PoE: Power over ethernet. A method of powering a camera by supplying power over the ethernet cable.
Portable Screening Wall: Comprised of three acoustical panels that are connected with 360-degree
hinges, this foldout wall prevents background objects from interfering with the Screening Process.
Radiometric Infrared Camera: An Infrared Camera, such as the Thermoscreen IS640 Infrared Camera,
that has been calibrated to measure an object’s temperature by measuring the quantity of Infrared
Energy emitted by the object.
Region: A rectangle or polygon that can be drawn on the Thermal Image to limit the Screening Zone.
Region Data Grid: The table below the Thermal Image that displays temperature statistics of pixels
enclosed by Region that the user has drawn on the Thermal Image.

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Sample Size: A software setting that determines the number of previous Screening Measurements
to use when automatically calculating Skin Offset when Automatic Skin Offset is enabled.
Screening Area: The space that includes the fever screening system and subjects being screened and
waiting to be screened. This area should be relatively uniform in temperature and humidity.
Screening Distance: The distance from the Thermoscreen Infrared Camera where subjects are to stand
while being screened.
Screening Line: The location where subjects should stand to be screened.
Screening Line Mat: A rubber mat that is place at in the Screening Zone to designate the Screening Line.
Screening Measurement:Measurement of Facial Skin Temperature and subsequent comparison to Skin
Threshold, resulting in a Screening Result =Pass or Fail outcome.
Screening Process: The specific processes involved in screening a subject including Face Detection and
Movement Detection (Automated Screening Mode only), Verbal Commands (Automated Screening
Mode only), and calculating and displaying Screening Measurements and Screening Results.
Screening Result: Pass or Fail outcome of a Screening Test.
Screening Test: Evaluating one subject by means of the Screening Process and obtaining a Screening
Result.
Screening Zone:The area within the field-of-view of the Thermoscreen Infrared Camera wherein
Screening Tests are performed.The Screening Zone can be further limited by drawing Regions to
enclose only those areas used in the Screening Process.
Skin Offset: A software setting that represents the calculated estimate of the average difference
between Facial Skin Temperature and Internal Core Temperature within a subject group.This value is
subtracted from Fever Threshold to calculate Skin Threshold. Skin Offset is added to the facial skin
measurement to calculate Internal Core Estimate.
Skin Threshold: The temperature of the skin (usually on the face near the inside corners of the eyes)
that indicates a potential feverish condition. This value is internally calculated by the Thermalyze
Software by subtracting Skin Offset from Fever Threshold. Note: Thermoscreen Operators do not have
access to alter this value directly.
Subject Group: A group of subjects to be screened wherein each individual in the group has be exposed
to similar environmental conditions, such as temperature and humidity, time of day, and general activity
level. Examples of subject groups include passengers waiting to board an airplane, patients sitting in a
waiting room, or pedestrian visitors entering a hospital.
Thermal Emission: All objects emit Infrared Energy and higher temperature objects emit higher levels of
Infrared Energy.

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Thermal Image: An image captured by the Thermoscreen Infrared Camera and analyzed and displayed
in the Thermalyze Software.
Thermal Image Sequence: A sequence of images captured by the Thermoscreen Infrared Camera.
Thermalyze: Optotherm computer software used to capture images from the Thermoscreen
Radiometric Infrared Camera which performs processing required to determine if subject skin
temperatures exceed the Skin Threshold.
Thermoscreen Infrared Camera: A Radiometric Infrared Camera used in the Thermoscreen Infrared
Fever Screening System that detects, measures, and forms an image of the LWIR energy that is
continuously emitted from human skin.
Thermoscreen System: All hardware and software included in a complete, turn-key Thermoscreen Fever
Screening package including Optotherm Radiometric Infrared Camera, Thermalyze Software, Computer
and Monitor, Mobile Computer Stand, and other system accessories.
Unobserved Violation: An operator fails to observe when a Fever Threshold Violation occurs.
USB 2.0: This specification supports data transfer rates up to 480 Mbit/sec and was released in April
2000.
USB 3.0: This specification supports data transfer rates up to 5 Gbit/sec and was released in July 2013.
USB3 Vision: This is a standard for transporting high-speed imaging and video data to computers over
the USB 3.0 bus at speeds up to 3 Gb/s. USB3 Vision uses the applications programming interface (API)
defined by the GenICam standard to access and control features in compliant cameras and other
imaging products.
Use Violations: A software settings that determines if the Screening Temperature is used during a Fever
Threshold Violation when calculating Automated Skin Offset.
Verbal Commands: When operating in Automated Screening Mode, audible commands are issued from
the computer speakers with instructions and notifications for both operators and subjects.
Violation Alarm: A visual or audible alarm that is activated when a Fever Threshold Violation occurs.
Violation Indicator: An visual indicator that is displayed on the computer screen then a Fever Threshold
Violation occurs.
Violation Image: The Thermal and/or Visual Image captured when a Fever Threshold Violation occurs.
Violation Report: A Thermal Image and/or Visual Image along with several primary fever screening
parameters that can be saved to file or printed.
Violation Review Window: A window within the Thermalyze Software that displays Thermal and Visual
Sequences of a Fever Threshold Violation selected in the Violation Window.

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Violation Sequence:The Thermal and/or Visual Image Sequence captured when a Fever Threshold
Violation occurs.
Violation Window: A window within the Thermalyze Software that displays Thermal and Visual Images
of the three most recent Fever Threshold Violations.
Visual Camera: A camera that forms a continuous sequence of images by detecting visible light. The
Visual Camera is used by operators to identify subjects while they are being screened.
Visual Image: An image captured by the Thermoscreen Visual Camera.
Visual Sequence: A sequence of images captured by the Thermoscreen Visual Camera.

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1.3 Applications and Features
Thank you for purchasing an Optotherm Thermoscreen System, designed specifically for mass human
fever screening. Thermoscreen provides a fast and noninvasive way to detect individuals with elevated
Facial Skin Temperature that may indicate a fever.
Thermoscreen is best utilized as the first of a two-point procedure for identifying feverish individuals. At
the entrance to crowded areas, Thermoscreen can be used to detect individuals whose Facial Skin
Temperature is higher than normal. A fever is then confirmed using a Medical Thermometer. This two-
point system enables large groups of people to be screened quickly and accurately to effectively prevent
febrile individuals from entering areas where contagious diseases can spread easily.
Applications
Hospital
Protect both patients and visitors
Airports
Screen arriving and departing passengers
Businesses
Safeguard the health of patrons and employees
Educational
Institutions
Help provide a safe environment for students and faculty
Key Features
Integrated Visual Camera allows operators to quickly identify feverish subjects
Automated Screening Mode provides operator-free and self-monitoring operation
Automated Verbal Commands, face detection, and movement detection
Automated Skin Offset compensation
Fast setup – simply turn it on and start screening
No Black-Body Calibration Source required
+/- 0.3°C accuracy and 0.04°C sensitivity
Real-time image capture at 60 frames-per-second
Adjustable Fever Threshold
Adjustable Screening Zones
Audible and visual alarms
Violation Image and Sequence review and saving
Display and statistical analysis of past Screening Measurements and Results
All inclusive turn-key system

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Advantages over using Medical Thermometers Alone
Thermoscreen can screen over 1000 subjects per hour, more than 10 times the screening rate
using Medical Thermometers alone.
Thermoscreen screenings do not require contact with subjects and are conducted at a distance.
Thermoscreen performs evaluations based on Facial Skin Temperature measurements of
previously screened subjects. Studies indicate that temperature screening should be evaluated
in relation to the temperature characteristics of specific subject groups.
Subjects can be screened using a single Thermoscreen System. Studies confirm the importance
of using the same instrument when screening subject groups in order to obtain repeatable
results.
The accuracy of Thermoscreen measurements are not influenced by operator skill.
Thermoscreen measurements are not heavily influenced by prior consumption of hot or cold
liquids.
Advantages over Competing Systems
Highest Accuracy
Thermoscreen is designed to be intrinsically accurate; a reference Black-Body Calibration Source is not
required during operation. Each Thermoscreen System undergoes an extensive calibration procedure.
During operation, software algorithms provide real-time compensation for environmental variables that
can affect Screening Measurements and Results. Furthermore, Thermoscreen hardware is designed to
prevent stray Infrared Energy from affecting Screening Measurement accuracy.
Many competing fever screening systems require a reference calibration source to be placed within view
of the camera during operation to correct for camera inaccuracy. The use of an external reference
source adds complexity, increases setup time, decreases portability, and places restrictions on the areas
in which the system can be operated.In addition, the use of a reference source can lead to significant
instability and measurement errors if misalignment occurs between the camera and source or if
environmental factors cause the source temperature to drift during operation.
Automated Screening Mode
This mode of screening provides the most accurate and effective method of mass fever screening.
Thermoscreen guides subjects through the Screening Process by issuing verbal commands, thus
reducing the demands on operators, allowing them to focus their attention on addressing Fever
Threshold Violations. During the Screening Process, individuals are required to stand still to prevent
image blur from degrading measurement accuracy. Important: Subject movement can reduce a
subject’s measured Facial Skin temperature by more than 3°C (5.4°F), resulting in an inaccurate
Screening Measurement.
After an individual has been screened, an estimate of Internal Core Temperature is displayed.
Important: Internal Core Estimate is used solely as a reference level for setting Fever Threshold and
should not be regarded as a measurement of Internal Core Temperature.

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Because Skin Threshold can vary depending on time of day and on other factors affecting specific
Subject Groups, such as the temperature and humidity to which a group has been exposed, individuals
are evaluated based on Screening Measurements of previously screened subjects, not on a fixed
temperature threshold. Evaluating subjects in this manner helps minimize both Missed Detections and
False Violations. Important: Facial Skin Temperature varies with environment and physiological factors
and does not always accurately reflect Internal Core Temperature. Raised Facial Skin Temperature can
occur in the absence of fever and lowered Facial Skin Temperatures can occur in the presence of fever.
Integrated Visual Camera
A Visual Camera is mounted inside the Camera Enclosure next to the Thermoscreen Infrared Camera to
provide continuous visual images of subjects as they pass through the Screening Zone. Real-time video
enables operators to quickly identify subjects as they are being screened. Highlighted areas and
temperature values on the Thermal Image are transferred to the Visual Image so that operators can
quickly process screening results.
Complete System
Thermoscreen is a complete turn-key system including Radiometric Infrared Camera, integrated Visual
Camera, fever screening Software, computer, and Mobile Computer Stand.All software is pre-installed
and each system is fully tested prior to shipment.
About This Manual
The topics in this manual were designed to be read sequentially. Each topic uses information from
previous topics. Please read this entire manual to gain a full understanding of the capabilities and
operation of Thermoscreen.

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1.4 How It Works
Thermoscreen operates by detecting and quantifying the LWIR energy that is continuously being
emitted from human skin. Thermoscreen operates in real-time, capturing Thermal Images at a rate of
60 frames-per-second, and is capable of evaluating thousands of individuals per hour so as not to
restrict pedestrian flow. Thermoscreen can be operated in either of two screening modes; Manual
Screening Mode or Automated Screening Mode.
Manual Screening Mode
As subjects walk through the Screening Zone, Internal Core Estimate is displayed and facial areas with
Facial Skin Temperature above Skin Threshold are displayed in red, orange, and yellow colors on the
computer screen. A large FAIL button illuminates on the main screen and an alarm sounds to notify the
Thermoscreen operator when a Fever Threshold Violation occurs.Skin Offset must be calculated prior
to screening and may need to be adjusted periodically if ambient conditions in the Screening Area
change appreciably or if Subject Group characteristics change. The operator may also need to
periodically adjust Fever Threshold to regulate the number of False Violations and Missed Detections for
specific screening applications.
In Manual Screening Mode, subjects can be screened individually or in groups as they walk through the
Screening Zone.Note: Screening multiple subjects simultaneously may require additional attention from
the operator.
Important:It is highly recommended to have subjects stop briefly (for less than a second) while being
screened in order to achieve the most accurate Screening Measurement possible. Due to the response
time of Infrared Cameras, the blur associated with moving subjects can result in an erroneously low
Screening Measurement. When moving subjects are screened, the measurement of critical areas, such
as between the eyes, is averaged with lower temperature adjacent areas, such as the bridge of the nose
and eyebrow.
Automated Screening Mode
This mode of screening provides the following features and advantages:
Face Detection
Movement Detection
Verbal Commands
Higher measurement accuracy
Automatic calculation of Skin Offset
When operating in Automated Screening Mode, each subject is screened individually. The screening
process begins when a subject is detected upon entering the Screening Zone. A subject is detected
when the maximum temperature within the Screening Zone is above the Person Detection
Temperature. When a person is detected, an automated verbal command is issued through the
computer speakers to "please stand still and look directly at the camera" and a large PERSON indicator
illuminates on the screen.After Thermoscreen verifies that the subject’s face is not moving, the

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measurement is conducted, and the Screening Results are displayed and announced. Subjects whose
Facial Skin Temperature is equal to or above the Skin Threshold are instructed to "please wait here for
an attendant" and a large FAIL button illuminates on the screen. Subjects whose Facial Skin
Temperature is below Skin Threshold are given the message "thank you, you may proceed" and a large
PASS button illuminates on the screen.
One of the most important benefits of Automated Screening Mode is improved measurement accuracy.
Because individuals are required to stand still and face the camera while being screened, more accurate
and consistent measurements can be performed.
Another important benefit is automatic calculation of Skin Offset. During operation, this offset is
calculated based on a statistical analysis of previous Screening Measurements. Automatic offset
calculation can compensate for changes in Facial Skin Temperature caused by variations in the ambient
temperature and variations in Internal Core Temperature due to Circadian Cycle.It can also compensate
for variations of Subject Group characteristics, such as changes in level of activity. For instance, a
Subject Group that is walking will, in general, have a lower Skin Offset than the same Subject Group that
is seated.
Because Automated Screening Mode issues verbal commands to instruct subjects during the Screening
Process, operators are able to focus more attention on addressing Fever Threshold Violations and line
control.If screening stations are designed properly, a single operator can manage multiple screening
stations.
Note: When screening subjects individually in automated screening mode, the maximum screening
throughput is approximately 1,200 subjects per hour.
Visual Camera
In both Manual and Automated Screening Modes, live visual images of subjects can be displayed next to
their Thermal Images to allow operators to reliably identify subjects.
Violation Images and Review
To allow continued screening after a Fever Threshold Violation has occurred, Thermal and Visual Images
captured during the three most recent violations are displayed in the Violation Window. Without
stopping the Screening Process, operators can review and address these previous violations. Single
Violation Images can be scanned quickly. To enable a more detailed review, the Violation Sequence
recorded during the violation can also be replayed. Additionally, Violation Images and Violation
Sequences can be automatically or manually saved to hard disk for historical documentation.

Thermoscreen User Manual 2020-03-09 Page 19 of 145
1.5 Thermoscreen Accessories
Mobile Computer Stand
The Mobile Computer Stand (see figure 1.5.1) provides a convenient way to operate, transport, and
store the Thermoscreen System and allows the fever screening station to be easily moved to alternate
locations to screen additional areas or to accommodate changes in pedestrian traffic. The camera post
mount allows the Infrared Camera to be manually aimed in any direction. The stand Includes power
cord organizer bag and surge protected power strip.
Figure 1.5.1 – Thermoscreen installed on Mobile Computer Stand