Chauvin Arnoux C.A 1954 DiaCAm2 User manual

GB -User’s manual
C.A 1954
THERMAL CAMERA

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ATTENTION
An infrared camera is a sensitive optical measuring device. Pay special attention to the following points:
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
professions such as fire-fighting and border surveillance. 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 malfunctions in advance, and so forestall their occurrence and prevent production incidents. 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 industrial
surveillance.
Thank you for purchasing a C.A 1954 thermal camera.
For best results with your device:
Read these operating instructions carefully,
Comply with the precautions for use.
Meanings of the symbols used on the device:
The CE marking indicates compliance with the European "Low Voltage" and "Electromagnetic Compatibility"
directives (2014/35/UE).
In the European Union, this product is subject to selective collection and recycling at end-of-
life as waste
electrical an
d electronic equipment under directive 2002/96/EC (WEEE): this equipment must not be treated
as ordinary household waste. The spent batteries must not be treated as household waste. Take them to
the appropriate collection point for recycling.
This product is designed to allow recovery and recycling of most of its constituents.
WARNING ! Class 2 laser radiation. If the flap is open, do not look at the beam.

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CONTENTS
1. GETTING STARTED .......................................................................................................5
1.1. Elementary precautions............................................................................................5
1.1.1. Never aim the camera towards the sun or other source of intense thermal
radiation........................................................................................................5
1.1.2. Avoid exposing to dust with the lens flap open..............................................5
1.1.3. Do not touch the lens with your fingers.........................................................5
1.1.4. Avoid jolting or dropping the camera.............................................................5
1.1.5.Do not point the laser pointer at a person's eyes..........................................5
1.2. Powering the camera................................................................................................6
1.3. Inserting the micro SD memory card.........................................................................6
1.4. Organization of the display .......................................................................................7
1.4.1. Battery management .........................................................................................7
1.4.2. Main screen ..................................................................................................8
1.4.3. Displaying the menus..................................................................................11
1.5. Configuring the camera...........................................................................................11
1.5.1. Changing the language of the camera........................................................11
1.5.2. Changing the camera's date and time.........................................................11
1.5.3. Changing the units of temperature and of distance.....................................12
1.5.4. Changing the function associated with the trigger of the camera................12
1.5.5. Setting the time before automatic shutdown of the camera ........................12
1.5.6. Adjusting the brightness of the screen........................................................12
1.5.7. Changing the image backup location..........................................................13
1.5.8. Changing the colours used in the images...................................................13
2. MEASUREMENT CAMPAIGN.......................................................................................14
2.1. Estimating the temperature of an object without a cursor.......................................14
2.2. Locating the cold and hot spots in the image..........................................................14
2.3. Measuring the temperature of a point in the image.................................................14
2.4. Determining the characteristics of a zone on the screen ........................................14
2.5. Displaying the temperature profile of a line in the image........................................14
2.6. Displaying points at the same temperature in the image ........................................15
2.7. Freezing the colours representing the temperatures ..............................................15
3. MORE PRECISE MEASUREMENT CAMPAIGN ..........................................................16
3.1. Good practices........................................................................................................16
3.2. Use influencing parameters consistent with the conditions of measurement..........16
3.2.1. Using the default compensation for the influencing factors.........................16
3.2.2. Using the user compensation for the influencing factors.............................17
3.3. Using a tripod..........................................................................................................17
4. SAVING AND RECALLING IMAGES............................................................................18
4.1. How are the image files named? ............................................................................18
4.2. Saving an image.....................................................................................................18
4.3. Where are the images saved?................................................................................19
4.4. Adding a vocal remark ............................................................................................19
4.5. Changing the vocal remark on an existing image...................................................19
4.6. Recalling an image.................................................................................................20
4.7. Playing back a vocal remark...................................................................................21
4.8. Deleting an image...................................................................................................21
4.9. Transferring an image to a PC................................................................................21
4.9.1. With the micro SD memory card .................................................................21
4.9.2. Via the USB cable.......................................................................................22
4.10 Creating an operating report including images from the camera ...........................22

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5. BACKUP AND RECALL OF USER CONFIGURATIONS .............................................23
5.1. Where are the configurations saved? .....................................................................23
5.2. Saving the current setup of the camera..................................................................23
5.3. Recalling a saved setup..........................................................................................23
5.4. Deleting a saved setup ...........................................................................................24
5.5. Returning to the default setup of the camera..........................................................24
6. BLUETOOTH FUNCTION .............................................................................................25
6.1. Activating/Deactivating the Bluetooth function........................................................25
6.1.1. Activating Bluetooth ....................................................................................25
6.1.2. Deactivating Bluetooth................................................................................25
6.2. Using the headset...................................................................................................25
6.2.1. How many headsets can be connected at a time?......................................25
6.2.2. Connecting a headset.................................................................................25
6.2.3. Disconnecting a headset.............................................................................26
6.2.4. Changing headsets.....................................................................................26
6.3. Using Bluetooth measurement peripherals.............................................................26
6.3.1. How many peripherals can be connected?.................................................26
6.3.2. How many measurements can be recovered from a peripheral?................26
6.3.3. What peripherals does the camera recognize?...........................................27
6.3.4. Connecting a Bluetooth measurement peripheral.......................................27
6.3.5. How are the Bluetooth peripherals chosen? ...............................................27
6.3.6. Replacing one peripheral with another........................................................27
6.3.7. Changing the frequency of reading of a Bluetooth peripheral.....................28
6.3.8. Displaying the measurements of the various Bluetooth peripherals............28
6.3.9. Using a Bluetooth measurement as an influencing parameter....................29
6.3.10. Displaying the Bluetooth measurements on the main screen .....................30
6.3.11. Can the Bluetooth measurements be saved at the same time as
an image?...................................................................................................30
7. UPDATING THE FIRMWARE OF THE CAMERA.........................................................31
7.1. Where can the firmware version of the camera be read? .......................................31
7.2. How update the firmware?......................................................................................31
8. ARE YOU HAVING DIFFICULTIES?.............................................................................32
8.1. The IR image I obtain is solid-colour.......................................................................32
8.1.1. The palette of colours is frozen...................................................................32
8.1.2. Inconsistent "user" influencing parameters.................................................32
8.2. The contrast of my IR image is wrong.....................................................................32
8.3. I am unable to save the current image....................................................................32
8.4. The file manager takes a very long time to respond...............................................32
8.5. I cannot connect my headset..................................................................................32
8.6. I cannot connect my Bluetooth peripheral...............................................................32
8.7. My Bluetooth measurements are not displayed or are not refreshed in the
measurements manager................................................................................................33
9. SERVICING AND MAINTENANCE ...............................................................................34
9.1 Cleaning the housing and screen of the camera......................................................34
9.2 Cleaning the infrared optics.....................................................................................34
9.3 Metrological checking ..............................................................................................34
9.4 Unpacking, re-packing.............................................................................................34
9.5 Repair......................................................................................................................34
10. WARRANTY ................................................................................................................35
11. DELIVERY CONDITION ..............................................................................................36

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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.
1.1.5. Do not point the laser pointer at a person's eyes
The camera has a laser pointer.*
Warning! Do not aim the laser beam towards a person's eyes, which could cause burns.

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1.2. Powering the camera
The camera acceptsAA batteries of two types:
- either alkaline batteries
- or Ni-MH rechargeable batteries.

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:
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.
Micro SD memory card

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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.
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
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). The battery manager can be controlled in two ways:
1. default mode
the operator is not required to enter any information, but is informed when the charge level of the batteries is low:
- no display before this low level is detected,
- display of approximately 30 minutes before automatic shutdown of the instrument.
2. advanced mode
This allows precise tracking of consumption, provided that the necessary data are correctly entered, namely:
- the type of batteries used,
- their theoretical capacity.
This battery manager assumes that the batteries inserted before the data are entered are fully charged.
The "Battery Management" menu selects the operating mode:
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.
The "Advanced" item determines whether the advanced mode is
active or not:
- Pressing F2 edits the value of the item.
- The Up/Down arrows select a value and F2
confirms entry.
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
Secondary measurements at
cursors
Bluetooth measurements
Palette of colours
Cursor surface
Display of measurements
Functions of the
F1, F2, and F3 keys
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
T
A
TF
TS
TL
Function of the trigger 
Aim (Aim + Laser)
Function of the trigger Freeze
Function of the trigger Save
Function of the trigger Laser (‘Laser’)
Presence of micro SD detected
Absence of micro SD detected
Value of the emissivity, user correction for influencing factors activated
Default correction for influencing factors
Date and time of acquisition of the current image
Continuous acquisition
Acquisition stopped Image frozen
When an image is recalled, the information becomes 
no display
Batteries OK
Batteries discharged
Batteries OK
Batteries low
Batteries discharged
no display Bluetooth function activated during creation of the file
Bluetooth not activated during creation of the file
Function 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
The correction of default 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 § 2.7. 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:
TA
Default management
Advanced management
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. Display of 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
Lights the laser pointer.
(∗) 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 permanent memory 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. The laser lights when the trigger is pressed.
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 F2 .
4. Laser
This function switches the laser pointer on and off.
When this function is selected, the "TL"icon is displayed in the status bar.
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 (15min 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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2. MEASUREMENT CAMPAIGN
By default, no measurement cursor is selected (selection of the
item 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. 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.
2.3. 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.
2.4. 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.
2.5. 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.

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2.6. 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.
2.7. 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
- 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".

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3. MORE PRECISE MEASUREMENT CAMPAIGN
3.1. Good practices
Make the measurement in the central zone of the screen.
Aim head on, not at an angle.
Measure scenes that are large enough.Avoid point-like scenes.
Following a variation of ambient temperature, wait for the camera to stabilize.
If the storage batteries have warmed up during charging, wait before putting them back in the camera.
3.2. Use influencing parameters consistent with the conditions of measurement
The flux received by the camera depends:
on the emissivity of the object observed,
on the temperature of the environment,
on the distance to the target,
on the relative humidity of the air.
The emissivity is the most crucial of the adjustments, whatever the measurement context.
The higher the relative humidity and the greater the distance, the larger the influence of the relative humidity.
The relative humidity, the ambient temperature, and the distance are likely to vary more significantly outdoors.
The measurement context may not match the default settings, leading to measurement errors that may be large. For this reason,
manual or "user" compensation is proposed to allow adjustment of these parameters.
Attention! Incorrect settings of the various parameters can lead to an aberrant result, possibly worse than that
obtained with the default parameters.
3.2.1. Using the default compensation for the influencing factors
The default compensation for the influencing factors matches
the context of calibration of the camera
(example: the emissivity is set to 1.00, the distance to 0.5m,
the relative humidity to 50%, and the ambient temperature to
25°C).
In this case, the parameters cannot be customized and are
displayed shaded in the Main/Target menu.
The value of the emissivity in the status bar is replaced by the
symbol .
If the emissivity of the object observed is close to this, and so
are the environment parameters, this calculation mode can be
used.
This is also the case if the operator does not need very precise
measurements (search for thermal bridge or temperature
difference).

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3.2.2. Using the user compensation for the influencing factors
This calculation mode is necessary when the measurement conditions are significantly different from the calibration conditions
(emissivity, relative humidity) and the operator wants accuracy.
When user compensation is selected, the various parameters
can be adjusted:
- emissivity: it is necessary to choose from a list of
materials or enter a value. There are 3 user values that
can be modified (press the Right key to enter the value,
the Up/Down keys to change it, and F2 to validate the
entry). Once it is validated the menu closes and the value
of the emissivity appears in the status bar.
it is adjustable from 1.00 to 0.05
- distance: the default is 2m,
it is adjustable from 0.5m to 999.9m
- relative humidity: the default is 55%,
it is adjustable from 0 to 100%
- ambient temperature: the default is 25°C,
it is adjustable from 0°C to +55°C
3.3. Using a tripod
To improve the sharpness of the images and therefore the accuracy of the measurements, it is possible to use a support that
prevents extraneous movements.
The camera can be attached to the tripods used in photography using the ¼-inch-diameter insert on the underside of the handle,
on the battery compartment cover.
Insert for ¼" camera tripod

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4. SAVING AND RECALLING IMAGES
If there is a micro SD memory card in the drive, it is possible to store, then recallthe current image and measurements
displayed.
4.1. How are the image files named?
The camera has two objectives, one for infrared images, the other for entering a photograph in the visible domain. In
consequence, when an image is recorded, two files are created, one for the infrared image, named
"yyyymmdd_hhmmss_IR.PNG", the other for the visible image, having the same name but without the IR extension
("yyyymmdd_hhmmss.PNG"), where yyyymmdd_hhmmss is the date and time of acquisition of the image (the operator must take
care to reset the system date and time in advance, see § 1.5.2. Changing the camera's date and time).
A third file may be added to the other two if a Bluetooth headset is connected to the camera and the operator accepts the
proposal to create a vocal message (see § 4.4. Adding a vocal remark). This file will be given the same name as the associated
IR image, with the extension .WAV instead of .PNG (e.g. yyyymmdd_hhmmss_IR.WAV).
When the image is frozen, it is possible to make several backups of the same image (addition of cursors, change of palette, etc.).
These are referred to as "derived" images: to differentiate these infrared images, which have the same date of acquisition, an
index from "a" to "z" is added after the date (e.g. 20141020_131254a_IR.PNG). When all indexes from "a" to "z" have been used,
the index "z" is re-used and the file that already bears this name is overwritten by the new one.
As for the visible image, it does not change and so is not duplicated. A single visible image can therefore be associated with
several infrared images (when erasing visible images other than via the camera's file manager, take care not to create orphan IR
images). Here again it is possible to add a vocal message, which will have the same name as the IR image (e.g.
20141020_131254a_IR.WAV).
4.2. Saving an image
It is possible to save an image when there is a micro SD memory card in the drive.
In normal operation 
if the function associated with the trigger is Aim or Freeze (see § 1.5.4. Changing the
function associated with the camera's trigger), it is first necessary to stop acquisition
(if this has not already been done, press F2 ) to freeze the image.
Either the F2 or the F3 key then takes on the function , allowing backup of the
current image in the working directory. If the trigger is assigned to the Save function,
each press freezes the image (if it is not already frozen) and records the frozen image
in memory.
If acquisition is stopped, each further press creates a new "derived" image (same date
of acquisition), differentiated by the addition to its name of an index (see § 4.1. How
are the image files named?)
If an image is recalled 
it is possible to create a new image (derived, because from the same acquisition) by
selecting the item in the Recall menu; a new index (see § 4.1.
How are the image
files named?)will be used, since the date of acquisition is unchanged.
When the backup is terminated, a message reports the name of the file that has just
been created.
If a Bluetooth headset is connected (see § 6.2.2. How to connect a headset) a second
message proposes adding a vocal remark to this file.

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As the case may
be, 1, 2, or 3 files are saved:
1 file for a derived image (same date of acquisition) with no headset connected (the visible image already exists,
only the IR file is created)
2 files for the creation of an image from a new acquisition (new date of acquisition) with no headset connected
(the IR and visible image files are created)
3 files for the creation of an image from a new acquisition with a vocal file
4.3. Where are the images saved?
The images are saved in the working directory selected by the operator in the Main/Files/Directory menu (see § 1.5.7. Changing
the image backup location). The working directory must be located on the micro SD card present in the device; if it is missing, an
error message informs the operator.
4.4. Adding a vocal remark
The vocal functions are performed by means of a Bluetooth headset, which must be connected to the camera (see § 6.2.2. How
to connect a headset).
The vocal message can be added only at the end of a backup of an image, after the display of the message indicating the name
of the file created. If the headset is connected, another message proposes recording a vocal message (see above). The duration
of a vocal message is limited to 30 seconds.

The vocal message recording window uses the F1, F2 and
F3 keys, which receive the following functions:

: to start recording (or adding another message)

: to stop recording or playback

: to play back the message

: to close the window (without creating a file
if the press was before the start of recording
or during recording).
4.5. Changing the vocal remark on an existing image
The only way to change a vocal file, apart from the record menu, is to create a new file and delete the old one.
First of all, the image concerned must be recalled
(see § 4.6. How to recall an image?), then saved by selecting
the item in the Recall menu.
A new derived image (with a new index, "a" to "z") is then
created.
If the headset is connected, a message proposes creating an
associated vocal record.
All that remains is to create the new message (see above) and
erase the old image (see § 4.8. How to delete an image?).

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4.6. Recalling an image
An image is recalled from the Main/Files/Images menu, provided that the micro SD card is in its slot.
The file manager lists only infrared images generated by the
camera bearing a name in the form
yyyymmdd_hhmmssX_IR.PNG, along with the folders, to allow
browsing in the tree of the SD card.
A preview of the image is provided, and the Right/Left keys can
be used to go from the infrared display to the associated
visible image.
Images that have an associated vocal message are identified
in the file manager by the icon , while the other images are
identified by the icon .
The F1, F2, and F3 keys associated with the file manager are:
deletes the selected file or directory (only empty directories can be deleted)
opens the selected directory or file (opening a file recalls it)
closes the file manager.
Opening an image closes the menus and the display of the
image on the main screen.
The status bar changes (see § 1.4.1.1. Status bar) and the file
name is displayed in red.
The F1, F2, and F3 keys associated with the main image recall screen are:
opens the recall menu, which allows the operator to modify the palette, the cursors, to toggle from the IR to the
visible image, to save the current image, to change the influencing parameters, or display the Bluetooth
measurements (if there were any when the recalled image was saved).
exits from image recall and returns to the file manager.
displays the complementary information concerning the file and gives access to playback of the associated audio
file as the case may be.
During a file recall, the trigger is used to toggle from the infrared image to the photograph of the target in the visible domain.