Chauvin Arnoux DiaCAm 2 CA 1900 User manual

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EN -User’s manual
C.A 1900
Thermal camera for body temperature measurement

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Thank you for purchasing a C.A 1900 thermal camera.
To obtain the best service from your instrument:
Read these user manual carefully,
Comply with the precautions for use.
PREC AUTIONS FOR US E
An infrared camera is a sensitive optical measuring device. It is not a medical device.
Never aim the camera towards the sun or other source of intense thermal radiation (e.g. welding, cutting, and similar
operations).
If parts of the camera are damaged or present problems following failure to heed the warnings listed above,neither the manufacturer
nor the distributor shall be held liable, and all costs incurred shall be borne solely by the operator.
INTRODUCTION
Infrared thermography detection technology has been in existence for many years in industrialized countries, where it has become
an indispensable means ensuring safety in industrial production. It is used in sectors of industry as diverse as metallurgy and steel-
making, electric power, petroleum, automation, the exploitation of natural gas, and transportation, and in other committed
professionssuch as fire-fighting and bordersurveillance. In all of these activities, characterized by just-in-time operating procedures,
high-voltage production equipment, powerful electric currents, and/or high operating speeds, infrared thermal imaging provides a
real-time non-contact inspection method.
This detection method does not require you to cut off the power, shut down the machines or interrupt production. It can diagnose
latent malfunctionsin advance, and so forestall theiroccurrence and prevent productionincidents. Thermal imaging is an innovative
non-contact evaluation technique that is safe, reliable, and rapid.
Compared to the contact-based detection instruments still widely used, this new technology is revolutionary. Infrared thermal
imaging detection technology has major applications in the following fields:
surveillance of electrical equipment and high-voltage transformers
locating leaks from thermal equipment and heat exchangers; analysis of heat losses
identification of thermal failures in rail transport
in the micro-electronics industry, rationalization of circuits by detection of systematic hot spots
fire-fighting, locating latent fire sources
at a fire, aid to victims and tactical command
security professionals, night time surveillance
This is why infrared thermal imaging detection technology is currently regarded by all concerned as the cutting edge in many
fields.
Thermography can also be used to take a body temperature.
Given that a fever is often a sign of an infectious disease, a specialized camera can be used to detect an abnormal elevation of
temperature and thereby contribute to reducing the risks of contagion.

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Meanings of the symbols used on the device:
The CE marking indicates compliance with the European Low Voltage
Directive (2014/35/EU),
Electromagnetic Compatibility Directive (2014/30/EU), Radio Equipment Directive (2014/53/EU), and
Restriction of Hazardous Substances Directive (RoHS, 2011/65/EU and 2015/863/EU).
The rubbish bin with a line through it means that
in the European Union, the product must undergo selective
disposal in compliance with Directive WEEE 2012/19/EU.
The product is declared recyclable following a life cycle analysis in accordance with standard ISO 14040.

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CONTENTS
1. GETTING STARTED .......................................................................................................................................................6
1.1. Elementary precautions...........................................................................................................................................6
1.1.1. Never aim the camera towards the sun or other source of intense thermal radiation............................6
1.1.2. Avoid exposing to dust with the lens flap open......................................................................................6
1.1.3. Do not touch the lens with your fingers.................................................................................................6
1.1.4. Avoid jolting or dropping the camera.....................................................................................................6
1.2. Powering the camera..............................................................................................................................................7
1.3. Inserting the micro SD memory card.......................................................................................................................8
1.4. Organization of the display......................................................................................................................................8
1.4.1. Battery management......................................................................................................................................8
1.4.2. Main screen.........................................................................................................................................10
1.4.3. Displaying the menus..........................................................................................................................13
1.5. Configuring the camera.........................................................................................................................................13
1.5.1. Changing the language of the camera................................................................................................13
1.5.2. Changing the camera's date and time.................................................................................................13
1.5.3. Changing the units of temperature and of distance.............................................................................14
1.5.4. Changing the function associated with the trigger of the camera........................................................14
1.5.5. Setting the time before automatic shutdown of the camera.................................................................14
1.5.6. Adjusting the brightness of the screen................................................................................................14
1.5.7. Changing the image backup location..................................................................................................15
1.5.8. Changing the colours used in the images...........................................................................................15
1.5.9. Compensate the difference between the internal body temperature and the skin temperature...........16
2. MEASUREMENT CAMPAIGN.......................................................................................................................................17
2.1. Estimating the temperature of an object without a cursor .....................................................................................17
2.2. Trigger an alarm when the measured temperature exceeds some limit................................................................17
2.3. Locating the cold and hot spots in the image........................................................................................................19
2.4. Measuring the temperature of a point in the image...............................................................................................19
2.5. Determining the characteristics of a zone on the screen.......................................................................................19
2.6. Displaying the temperature profile of a line in the image.......................................................................................19
2.7. Displaying points at the same temperature in the image.......................................................................................19
2.8. Freezing the colours representing the temperatures.............................................................................................19
3. MORE PRECISE MEASUREMENT CAMPAIGN...........................................................................................................21
3.1. Good practices......................................................................................................................................................21
3.2. Use influencing parameters consistent with the conditions of measurement........................................................21
3.3. Using a tripod........................................................................................................................................................22
4. SAVING AND RECALLING IMAGES.............................................................................................................................23
4.1. How are the image files named?...........................................................................................................................23
4.2. Saving an image ...................................................................................................................................................23
4.3. Where are the images saved? ..............................................................................................................................24
4.4. Adding a vocal remark...........................................................................................................................................24
4.5. Changing the vocal remark on an existing image..................................................................................................24
4.6. Recalling an image................................................................................................................................................25
4.7. Playing back a vocal remark .................................................................................................................................26
4.8. Deleting an image.................................................................................................................................................26
4.9. Transferring an image to a PC ..............................................................................................................................26
4.9.1. With the micro SD memory card .........................................................................................................26
4.9.2. Via the USB cable...............................................................................................................................27
4.10 Creating an operating report including images from the camera..........................................................................27
5. BACKUP AND RECALL OF USER CONFIGURATIONS...............................................................................................28
5.1. Where are the configurations saved?....................................................................................................................28
5.2. Saving the current setup of the camera ................................................................................................................28
5.3. Recalling a saved setup........................................................................................................................................28
5.4. Deleting a saved setup..........................................................................................................................................29
5.5. Returning to the default setup of the camera........................................................................................................29
6. BLUETOOTH FUNCTION .............................................................................................................................................30
6.1. Activating/Deactivating the Bluetooth function.......................................................................................................30
6.1.1. Activating Bluetooth ............................................................................................................................30
6.1.2. Deactivating Bluetooth........................................................................................................................30
6.2. Using the headset or a Bluetooth speaker............................................................................................................30
6.2.1. How many headsets can be connected at a time?..............................................................................30
6.2.2. Connecting a headset.........................................................................................................................30
6.2.3. Disconnecting a headset.....................................................................................................................31
6.2.4. Changing headsets.............................................................................................................................31
6.3. Using Bluetooth measurement peripherals...........................................................................................................32
6.3.1. How many peripherals can be connected? .........................................................................................32
6.3.2. How many measurements can be recovered from a peripheral?........................................................32
6.3.3. What peripherals does the camera recognize?...................................................................................32
6.3.4. Connecting a Bluetooth measurement peripheral...............................................................................32
6.3.5. How are the Bluetooth peripherals chosen?........................................................................................32

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6.3.6. Replacing one peripheral with another................................................................................................33
6.3.7. Changing the frequency of reading of a Bluetooth peripheral.............................................................33
6.3.8. Displaying the measurements of the various Bluetooth peripherals....................................................33
6.3.9. Using a Bluetooth measurement as an influencing parameter............................................................35
6.3.10. Displaying the Bluetooth measurements on the main screen..............................................................36
6.3.11. Can the Bluetooth measurements be saved at the same time as an image?......................................36
7. UPDATING THE FIRMWARE OF THE CAMERA..........................................................................................................37
7.1. Where can the firmware version of the camera be read?......................................................................................37
7.2. How update the firmware? ....................................................................................................................................37
8. ARE YOU HAVING DIFFICULTIES?..............................................................................................................................38
8.1. The IR image I obtain is solid-colour.....................................................................................................................38
8.1.1. The palette of colours is frozen...........................................................................................................38
8.1.2. Inconsistent "user" influencing parameters .........................................................................................38
8.2. The contrast of my IR image is wrong...................................................................................................................38
8.3. I am unable to save the current image..................................................................................................................38
8.4. The file manager takes a very long time to respond..............................................................................................38
8.5. I cannot connect my headset................................................................................................................................38
8.6. I cannot connect my Bluetooth peripheral.............................................................................................................38
8.7. My Bluetooth measurements are not displayed or are not refreshed in the measurements manager...................39
9. SERVICING AND MAINTENANCE................................................................................................................................40
9.1 Cleaning the housing and screen of the camera....................................................................................................40
9.2 Cleaning the infrared optics....................................................................................................................................40
9.3 Unpacking, re-packing............................................................................................................................................40
10. WARRANTY ................................................................................................................................................................41
11. DELIVERY CONDITION ..............................................................................................................................................42
11.1 Accessories and spares........................................................................................................................................42
Appendix I – Menu tree......................................................................................................................................................43
Appendix II – Technical specifications ...............................................................................................................................46

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1. GETTING STARTED
1.1. Elementary precautions
1.1.1. Never aim the camera towards the sun or other source of intense thermal radiation
Direct exposure to sunlight or other strong thermal radiation can impair the operation of the camera and make the infrared sensor
partially or totally inoperative for as long as several months.
We therefore recommend closing the lens flap when the camera is not in use, to avoid any accidental exposure.
1.1.2. Avoid exposing to dust with the lens flap open
Even though it is rated IP54 (dust and splash protected), it is best not to use the camera in a dusty environment: dust deposited on
the lens can not only perturb the measurements (absorption of part of the thermal flux and spurious diffusion) but also impair the
sharpness of the images.
To clean your lens, refer to §9.2 Cleaning the infrared optics.
1.1.3. Do not touch the lens with your fingers.
Finger marks must be carefully avoided, because acids from the skin attack the coatings and the glass of the lens; they can leave
indelible traces. Refer to §9.2 Cleaning the infrared optics.
1.1.4. Avoid jolting or dropping the camera.
The camera is rugged, but even so it is a delicate precision instrument which should not be jolted or dropped.

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1.2. Powering the camera
Spent primary and storage batteries must not be
treated as ordinary household waste. Take them to the
appropriate collection point for recycling.
The camera acceptsAA batteries of two types:
- either alkaline batteries
- or Ni-MH rechargeable batteries.
- or an adapter for a USB power supply (optional).

The latter must be recharged with an external charger.

When the batteries are withdrawn, the internal clock
has enough power for 15 hours.

The batteries are inserted through the end of the
handle.

Open the cover using a coin while pressing down on
the locking tab:

Once the power supply is in place, you must configure
the battery manager (see 1.4.1. Battery management)

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1.3. Inserting the micro SD memory card
The files created by the camera (image, audio, and setup
files) are stored only on the micro SD memory card located
on the left side of the head.
If this card is missing, an error message appears as soon as
access to it becomes necessary.
The memory card must be formatted:
- either in FAT16 format,
- or in FAT32,
or it cannot be read.
To insert the card, open the rubber flap and push the card into
its slot. Refer to the diagram opposite.
Take care to insert it in the right direction.
If the card cannot be inserted:
- either it is in the wrong direction and must be turned
around;
- or there is already a card in the slot.
1.4. Organization of the display
In principle, the camera starts up:
in its main display,
in continuous acquisition mode,
with the setup loaded when it was last switched off.
However, after the batteries have been withdrawn, when the camera is started up, a "Battery Management" menu is displayed
(unless the type of power supply selected is "USB supply").
It can be displayed on demand, by keeping the F2 key pressed when the camera is started up.
Information messages may be superimposed on this screen (example: messages for reconnection of the Bluetooth peripherals if
they had been used, or error/information messages, as the case may be).
The system date and time entry menu is displayed if the power supply to the internal clock has been interrupted. It is recommended
in this case to update this information, which is used in the names of the image files.
1.4.1. Battery management
The camera can have its own power supply (rechargeable or primary batteries) or be powered via a USB power supply kit that is
connected to mains.
To inform the operator of the state of the batteries during operation, the camera has a battery indicator in the status bar of the
main screen (see §1.4.2.1. Status bar).
This indicator is updated by a battery manager that is configured in the "Battery Management" menu.
This menu appears when the device is first switched on after the batteries have been removed (unless "USB Supply" has been
selected previously). To call it up on demand, press the F2 key when the camera is switched on. This is necessary in particular to
return to an internal power supply mode and reactivate management of the battery gauge.
With the internal power supply, the battery manager serves to track energy consumption and thereby provide an estimate of how
much energy is left. For a good estimate of battery life, the right information must be entered in the menu: select the type of
battery inserted (rechargeable or primary) and enter a consistent theoretical capacity. The manager assumes that when inserted,
the batteries are fully charged.
Micro SD memory card

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With the USB adapter, the manager is no longer actuated and the batteries will always appear as fully charged in the status bar.
The camera will remain on until switched off by the user or by the auto-off system. It may be useful in this mode to deactivate the
instrument's auto-off function so that the camera remains on at all times (see 1.5.5. Setting the time before automatic shutdown of
the camera).
Warning: Like all the other parameters entered by the user, these values are stored in lasting form when the camera is
switched off by the i/o key of the keypad (the information is lost if there is a power outage).
F1 confirms the information entered, closes the window
and initializes the battery manager with these settings.
F2 edits and confirms entry of the selected item.
F3 cancels an entry or closes the window without
resetting the battery manager.
Type of batteries: The camera is delivered with low-self-discharge Ni-MH rechargeable batteries with a capacity of approx.
2500 mAh. These are the default parameters.
If the user always uses the same set of rechargeable batteries, it may be useful to operate until the camera
automatically switches off because the batteries are low. In this case, the theoretical capacity of the
batteries entered at the outset is automatically adjusted in light of the actual discharge. This new capacity
is proposed by default the next time the menu is displayed.

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1.4.2. Main screen
The screen is divided into 4 zones:
Status bar
Cursor main
measurement
Temperature of the
hottest point
Secondary measurements
at cursors
Bluetooth measurements
Palette of colours
Alarm threshold
Max cursor (hottest point)
Average of temperatures of
healthy individuals
Number of measurements used
in the average
Display of measurements
Functions of the
F1, F2, and F3 keys
The ~ symbol before the reading indicates that the camera has not yet stabilized.
An image covers the entire surface of the screen; the following items are superimposed on
it:

status bar

palette of colours

the display of the main and secondary measurements (in IR)

the display of the Bluetooth measurements (on request)

the functions of function keys F1, F2, and F3

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1.4.2.1. Status bar
This bar tells the operator the current operating mode of the camera.
In normal operation, it contains the following information 
no display
Batteries OK
Batteries discharged
Batteries OK
Batteries low
Batteries discharged
no display
Bluetooth function activated
Bluetooth not activated
TA
TF
TS
TL
Function of the trigger Aim
Function of the trigger Freeze
Function of the trigger Save
Function of the trigger Load Measurement
Presence of micro SD detected
Absence of micro SD detected
Value of the emissivity, user correction for influencing factors activated
Date and time of acquisition of the current image
Continuous acquisition
Acquisition stopped Image frozen
When an image is recalled, the information becomes 
Batteries OK
Batteries low
Batteries discharged
no display Bluetooth function activated during creation of the file
Bluetooth not activated during creation of the file
TAFunction of the trigger Aim, forced when an image is recalled
Recall of infrared image in progress
Recall of visible image in progress
no display
The correction of user influence factors is activated
Recalled file name
1.4.2.2. Palette of colours
The colour palette is used to identify the temperatures of the various colours used on the thermogram. By default, this
temperature/colour assignment is done automatically as a function of the minimum and maximum temperatures read in each image.
But the operator can also fix this relation by forcing the min. and max. temperatures: imposing a "frozen" palette
(see § 2.8. Freezing the colours representing the temperatures).
In the automatic mode, the palette is represented as follows:
When the palette is frozen, the min. and max. temperatures
are shown in red and a padlock appears in the centre:
Default management
Advanced management

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1.4.2.3. Display of the measurements
This space is used to display the measurements of the various cursors, along with the Bluetooth measurements when a
peripheral measurement device is connected and when the measurement is selected for display.
Measurement of the surface cursor
Bluetooth measurements (only one has been validated for display)
See §2. Measurement campaign and §6.3.10. Displaying the Bluetooth measurements on the main screen.
1.4.2.4. Functions of the F1, F2, and F3 keys
The F1, F2, and F3 (*) keys have different functions depending on the display and camera
operation context. These functions are identified by the icons displayed in this space above the
keys in question:
Opens the menu or re-opens the last menu opened
Closes all open menus
Validates an item, an entry, closes a message, adds the selected character...
Closes a menu, cancels an entry, a record
Freezes the image
Restarts continuous acquisition
Saves the current image
Validates the entry in the text editor or the selection in the working directory
Deletes the file or folder selected in the file manager
Opens the file or folder selected in the file manager
Exits from image recall
Information concerning the recalled file
Freezes the colour palette
Edits the min or max value of the palette or restores automatic mode
Displays the infrared image
Displays the visible camera image
Plays back the vocal message
Records a new vocal message
Stops playing or recording the vocal message
Searches for new Bluetooth peripherals
Connects all Bluetooth peripherals in the current list
Add the present measurement to the average of the healthy persons inAdaptive alarm mode
(*) If none of these keys is pressed for about 20s, the display area shrinks in favour of display of the image.
Pressing a key restores the display of the functions.

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1.4.3. Displaying the menus
The menus are accessed by pressing the F1 key with the function . When a menu is displayed, new functions are assigned to
the F1, F2 and F3 keys.
Select an item in the menu using the arrow keys. The selected
items appear in yellow.
The F2 key is used:
-either to open the corresponding sub-menu
-or, in some cases, to modify the parameter represented.
The menus form a tree structure which is recalled in the title of
the window.
The F1 key closes all open menus, without action, and is
used to return to the main screen.
The F3 key closes the current window, without action
(return to the previous menu, if any, or to the main screen).
When a parameter is being modified, it appears on a blue
background with the symbol to the left; the possible values
can be scrolled using the Up/Down keys.
F2 pressed again the value is accepted.
An item that is displayed shaded cannot be modified.
1.5. Configuring the camera
When the camera is first started up, all parameters are initialized to "default" values; the operator can modify these settings to meet
his/her needs.
Once these adjustments have been made, they are stored in permanentmemory each time the device is switched off and recovered
when it is switched back on.
Most of these settings are accessible from the
"Main/Parameters/Adjustments" menu.
1.5.1. Changing the language of the camera
The menus are translated into languages which can be selected from the Main/Parameters/Adjustments menu
by validating the item.
1.5.2. Changing the camera's date and time
The camera's clock is reset from the Main/Parameters/Adjustments menu by validating the item .
This menu opens automatically at start-up if the power supply of the internal clock has been interrupted. It is essential to update the
date and time, in order to identify the records, because the thermogram file names depend directly on this information
(see §4.1. How are the image files named?).The information entered and validated is applied by F2 .

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1.5.3. Changing the units of temperature and of distance
From the Main/Parameters/Adjustments menu, validate the item opposite to select the unit in which
temperatures or distances are displayed:
-the temperature is displayed in degrees Fahrenheit (°F) or Celsius (°C),
-the distance in feet (ft) or metres (m).
1.5.4. Changing the function associated with the trigger of the camera
4 functions are associated with the trigger. They are selected from the Main/Parameters/Adjustments
menu by validating the items described below:
1. Aim
This function is used to toggle the display from the infrared image to the visible camera image, to make it
easier to aim at a target.
When this function is selected, the "TA" icon is displayed in the status bar at the top of the screen.
When an image is recalled, the trigger is automatically assigned to this function. Upon exit from the recall,
the function programmed by the operator is restored.
2. Freeze
This function is used to stop on an image: in this case, both images, infrared and visible, are frozen; you
can toggle between them by pressing F3 or .
When this function is selected, the "TF" icon is displayed in the status bar at the top of the screen.
Pressing again restarts continuous acquisition.
3. Save
This function starts by freezing the infrared and visible images, then records them on the micro SD card (if
one is present).
When this function is selected, the "TS" icon is displayed in the status bar at the top of the screen.
Each press entails another save, creating derivative files if acquisition is not restarted in the meantime.
To restart continuous acquisition, simply press F3 .
4. Load measurement
In adaptive alarm mode only, at each press, this function adds the present measurement to the average
temperature of the healthy persons so as to adapt the alarm threshold as time passes.
1.5.5. Setting the time before automatic shutdown of the camera
To extend its battery life, the camera switches itself off automatically (no operator action: key press, etc.) after a time that can be
set to between 15 and 60 minutes (45 minutes being the default value).
This function is accessible from the Main/Parameters/Adjustments menu, by validating the item opposite.
It is possible to deactivate this function (choose "None"), in which case the camera will switch itself off (if the operator does
nothing) when the batteries are too low to supply it.
1.5.6. Adjusting the brightness of the screen
For greater convenience of use, it is possible to adjust the screen lighting level. For example, the lighting can be lowered when it is
dark to avoid being dazzled, or turned up for use outdoors on a sunny day.
By default, the camera is configured in automatic mode: a luminosity sensor adjusts the lighting level at all times.
This adjustment, which directly affects the battery life, can be accessed from the
Main/Parameters/Adjustments menu by validating the item opposite.

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1.5.7. Changing the image backup location
The images are saved to a working directory which can be selected by the operator in the Main/Files menu, by
validating the item opposite.
The working directory must be located on the micro SD card,
which must be present in the device.
A default directory, « /media/sdcard/images », is defined.
Since the time it takes to access the micro SD card is rather
long, it is best to organize the records into several directories
and to limit the number of files in each of them; this will
make the time needed to display the content of each
directory shorter.
The current directory is chosen as working directory after F1
is pressed to close the window.
Pressing F2 opens the selected item of the list. Thus, to
move back up the tree to the previous level, open the " ..."
item of the list, and to create a new directory, open the "
New..." item.
The Create menu is used to enter the directory name; the
number of characters is limited to 20:
Select the letter to be insert using the arrows, add it with
F2 ,and confirm the entry with F1 .
Note: The button can be used to insert the
current date and time.
Attention! We recommend creating a directory in the root of the SD card to store the images: in the case
of FAT16 formatting, if long names are used, only 256 entries are available in the root (any combination
of 256 files and directories); the card will very quickly be considered full, even though its full capacity
has not been reached.
1.5.8. Changing the colours used in the images
The camera has several palettes of colours, one of which can be selected by validating the item of the Main/Display
menu.

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1.5.9. Compensate the difference between the internal body temperature and the skin temperature
As default (offset = 0°C), the temperature measured on an individual is the skin
temperature, which is approximately 2°C lower than the internal temperature. So the
temperature measured on a healthy person will be close to 35°C rather than the 37°C that
would be indicated by a medical thermometer (which generally makes this correction).
The possibility of adding a general offset to all measurements made by the camera is
therefore provided, to compensate this temperature difference and display the person's
internal temperature directly.
The adjustment is made in the Main/Target menu; an offset of up to +/-10°C in 0.1°C steps
can be entered.
Attention: remember to remove the offset for measurements that are not of body temperatures.

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2. MEASUREMENT CAMPAIGN
By default, it is the MinMax cursor that is selected in the
Main/Display/Cursor menu, and the camera produces only
infrared images.
2.1. Estimating the temperature of an object without a cursor
It is possible to evaluate a temperature from the information of the colour palette. The distribution of the colours between the
minimum and maximum temperatures displayed at the ends of the palette is linear, so simply interpolating based on the position of
the colour in the palette gives the temperature sought.
Example: if the colour of the zone of which the temperature is to be determined lies at the centre of the palette, the temperature
corresponding to this colour will be approximately Tmin + (Tmax – Tmin) * ½ = (Tmin + Tmax )/ 2, in other words the
mean of the min. and max. temperatures of the palette; if the colour lies in the 1st quartile, Tmin + (Tmax - Tmin) * ¼ etc.
2.2. Trigger an alarm when the measured temperature exceeds some limit
The camera has two types of alarm, a basic mode called Tmax that compares the highest temperature in the image to a
temperature threshold set by the user, and a more advanced mode called Adaptive that uses learning to adapt the triggering
threshold to allow for changes in the measurement conditions over time. When they are triggered, these alarms cause a change
in the display and, if a Bluetooth earbud is connected to the instrument, generate an audible beep (see §6.2.2. Connecting a
headset).
The activation of an alarm forces display of the MinMax cursor used to display the measurements, the max cursor indicates at
each acquisition the position of the highest temperature; the measurement displayed is stabilized for better reading comfort and to
limit spurious triggering.
Tmax alarm:
With this type of alarm, triggering occurs when the highest temperature in the image is greater than or equal to the temperature
threshold entered by the user.
Validating this item lets you
select one of the alarms
(Tmax, Adaptive, or None)
Adjustment of the Tmax alarm
threshold (not available here
because adaptive alarm is
selected)
Adjustment of the
temperature used in the
calculation of the Adaptive
alarm threshold

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When making your measurements, take care not to have of heat source other than the subject in the field of view of the camera,
and make sure that the hot spot is in fact on the desired target, since otherwise you risk triggering the alarm as shown below:
Adaptive alarm:
Activation of this alarm forces the trigger to the TF function ("Freeze measurement"). With this type of alarm, the triggering
threshold is fixed based a temperature of healthy persons to which is added the temperature difference entered in the "adaptive
threshold" item. The temperature of healthy persons is obtained as the average of not more than 6 measurements the user has
selected. When a new measurement is added after the first six, it replaces the oldest in the calculation.
A measurement is selected by pressing the function key Fx associated with the function or by pressing the trigger, when the
TL ("Load measurement") function is selected (see §1.5.4. Changing the function associated with the trigger of the camera).
For best results, we recommend regularly selecting new measurements, since this will serve for example to take account of changes
in the course of the day in the temperature of the room where the measurements are made, which can influence the results.
This average temperature will be saved when the instrument is switched off, to be used the next time the instrument is switched
on, while waiting for new measurements to be selected.
If too large a difference (>0.7 x temperature difference entered, with a minimum of 0.6°C) is found between the new measurement
you want to add and the average, this new measurement is used to reset the calculation (5 new measurements must be selected
again to attain maximum accuracy on the averaged value).
Type of alarm
Temperature threshold
Position of the hottest point
Temperature of hottest point
Type of alarm
Position of highest temperature
Alarm threshold = average
temperature of the healthy persons +
temperature
Average temperature of the healthy
persons
Number de measurements used in the
average
Highest temperature
"Add measurement" function
associated with the F2 key on
the keypad
Type of alarm
Temperature of the hottest point.
The alarm is triggered, the value
is displayed in red, and the cursor
is surrounded by a red box.

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Note that the temperatures accepted for this average must lie in the interval [30°C, 45°C]; if not, the measurement will be ignored.
Note: as default, the camera measures the skin temperature of the person aimed at; this external temperature is
approximately 2°C lower than the body's internal temperature. You can correct this difference to have a direct reading by
entering a general offset value that compensates the difference (see §1.5.9. Compensate the difference between the
internal body temperature and the skin temperature).
2.3. Locating the cold and hot spots in the image
In the Main/Display/Cursor menu, choose the Min/Max cursors they represent the minimum and maximum
temperatures in the image and display their values.
2.4. Measuring the temperature of a point in the image
In the Main/Display/Cursor menu, choose the Point cursor it gives the temperature of a point. It can be moved
on the image using the arrow keys.
Place the cursor in the centre of the screen and aim so as to shift the point to the centre.
2.5. Determining the characteristics of a zone on the screen
In the Main/Display/Cursor menu, choose the Surface cursor it indicates the mean, minimum, and maximum
temperatures of a square or rectangular area (the rectangular area has the same aspect ratio as the screen),
identified by the cursor.
Place the area in the centre of the screen, then aim so as to shift the target zone into this area.
Move this area using the arrow keys or adjust its size using the following combinations of keys: Up + Left to reduce it and Down +
Right to enlarge it.
2.6. Displaying the temperature profile of a line in the image
In the Main/Display/Cursor menu, choose the Profile cursor ; it highlights a horizontal line in the image
(Up/Down keys) and shows its profile. This cursor also identifies a point on this line (Left/Right keys) and indicates
its temperature.
2.7. Displaying points at the same temperature in the image
In the Main/Display/Cursor menu, choose the Isothermal cursor it marks with another palette of colours the
points at the same temperature to within a given tolerance. Selection of this mode requires two validations of the
menu item with the F2 key: one to activate selection of the colour representing the temperature (Up/Down keys
to scroll through the colours) and one to validate the choice and start the function).
Up/Down keys adjust the temperature
Left/Right keys adjust the tolerance
If a Bluetooth device provides a Dew Point temperature that has been selected for influence, the reference temperature is this
measurement (a logo precedes the value). The up / down keys (see above) have no action and the isotherm collects all the
points whose temperature is lower than the reference. Tolerance only increases this value.
2.8. Freezing the colours representing the temperatures
By default, assignment of the colours is automatic and is recalculated for each image as a function of the temperatures of the hot
and cold spots in the image.
In consequence, a given colour does not necessarily represent the same temperature from one image to another, if the hot and/or
cold spots change.
If you want the colours always to represent the same temperatures, the palette must be frozen (the min. and max. temperatures of
the palette remain constant, whatever the hot and cold spot temperatures in the image).
There are two ways to freeze the palette:
- either using the F2 or F3 key, when its function is

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- or from the Main/Parameters menu, by validating the item with the F2 key to change its value to "Manual"
(Up/Down keys).
When the palette is frozen, a red padlock appears on the palette; the min and max values are also red.
When the mode is entered, the minimum changes to edit mode for a few seconds (on a blue ground with the symbol )
so that its value can be changed (Up/Down keys).
To modify the max., a simple press on Right (when min. is in edit mode) edits the value. If there is no action on the keypad
for a few seconds, the edit mode disappears.
To re-edit a value, another press on the F2 or F3 key with the function , or another validation of the item
in the Main/Parameters menu, returns the min. value to edit mode.
To exit from the frozen palette mode, the following steps are necessary:
- if not in edit modetwo successive presses on F2 or F3 having the function
- if in edit modea single press from the edit mode or, from the Main/Parameters menu, by editing the item of
the Main/Parameters menu to restore the value "Automatic".