Dali LT Series User manual

LTX SERIES
INFRARED THERMAL IMAGING CAMERA
USER MANUAL V2.0
ZHEJIANG DALI TECHNOLOGY CO LTD
© 2020 DALI TECHNOLOGY

!Warning, caution and attention
DEFINITION
Warning Represents dangerous situations or actions that may cause personal injury or death.
Caution Represents situations or actions that may cause damage to the thermal imager or
permanent data loss.
Attention Represents prompt information useful to users.
Important information
please read before using the instrument
Warning –This instrument has a built-in laser transmitter. Do not stare into the laser beam.
The laser specification is 635 nm, 0.9mW, Class II.
Caution–Because the thermal imager uses a very sensitive thermal sensor, it is not allowed to
directly aimthe lens at a strong radiation source (such as the sun, direct or reflected laser beam,
etc.) under any circumstances (turn on or off), otherwise the thermal imager will be affected.
Cause permanent damage!
Caution- The original packaging box must be used during transportation. Do not shake or
bump the thermal imager strongly during use and transportation.
Caution–It is recommended to use the original packaging box when storing the thermal
imager, and place it in a cool, dry, ventilated environment without strong electromagnetic
fields.
Caution -Avoid oil stains and various chemical substances from staining and damaging the
lens surface.After use, please close the lens cap.
CautionIn order to prevent the potential danger of data loss, please copy (backup) the data to
the computer frequently.

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Attention Before reading the data accurately, the thermal imager may need 3-5 minutes to
warm up.
Attention -Each thermalimager has been temperature-calibrated before leaving the factory. It
is recommended to perform temperature calibration every year.
Attention -Do not open the case or modify it without authorization. Maintenance can only be
carried out by authorized personnel of our company.

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Contents
! Warning, caution and attention ...................................................... 2
1INTRODUCTION ........................................................................... 6
1.1 STANDARD ACCESSORIES..........................................................................................8
1.2 Optional accessories..........................................................................................................8
2Introduction for camera............................................................... 8
2.1 Function keys....................................................................................................................8
2.2 Interface ..........................................................................................................................12
3Basic Operation ......................................................................... 13
3.1 Battery Installation and Replacement .............................................................................13
3.1.1 Battery Loading/Unloading.....................................................................................13
3.1.2 Battery Replacement...............................................................................................14
3.2 General Instructions on Safe Battery Use.......................................................................15
3.3 Quick Start ......................................................................................................................15
3.3.1 Acquiring Thermal Image.......................................................................................15
3.3.2 Temperature measurement ......................................................................................16
3.3.3 Thermal Image Saving............................................................................................18
3.3.4 Thermal Image Playback.........................................................................................18
3.3.5 Export of Saved Information...................................................................................18
3.3.6 LCD Setting ............................................................................................................18
3.3.7 Menu Operation Instruction....................................................................................19
4 Opreation Guide ........................................................................... 20
4.1 Operation Interface Description......................................................................................20
4.1.1 Graphic Interface of Working Status Screen of Thermal Imager .............................20
4.1.2 Floating Bar Interface ..............................................................................................21
4.1.3 Main Menu Interface................................................................................................22
4.1.4 Sub-menu Interface..................................................................................................22
4.2 Add temperature measurement objects ..........................................................................23
4.3 Upper and lower limits of temperature measurement.....................................................23
4.4 Photo Taking ...................................................................................................................24
4.5 Preview............................................................................................................................24
4.6 Setting..............................................................................................................................25
4.6.1 General Setting.........................................................................................................26
4.6.2 Temperature Measuring Setting ...............................................................................28
4.6.4 Image Setting ...........................................................................................................31
4.6.5 TF management........................................................................................................34
4.6.6 Photo Setting............................................................................................................36
4.6.7 System Setting..........................................................................................................37
4.6.8 Time .........................................................................................................................39
4.7 File Management............................................................................................................40

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4.7.1 Playback...................................................................................................................40
4.7.2 Deletion....................................................................................................................42
5 Technical Specifications ............................................................... 43
6 Common Failure Countermeasures ............................................... 45

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1INTRODUCTION
Thank you for choosing the LTX series of handheld infrared thermal imaging cameras (hereinafter
referred to as thermal imaging cameras) from Zhejiang Dali Technology Co., Ltd. (hereinafter
referred to as Dali Technology).
Model identification
LT3-P thermal imager adopts 25um 160*120 detector, temperature measurement range is
-20°C~+350°C, 3.5″TFT LCD, can be extended to 650°C.
LT7-P thermal imager adopts 25um 384*288 detector, temperature measurement range is
-20°C~+650°C, 3.5″TFT LCD, can be extended to 1200°C.
FUNCTIONS
LT3-P\LT7-P includes the following functions:
11 color codes can be selected
11 languages available
4 movable points measurement
Temperature measurement in 3 areas
Line temperature measurement
Hottest spot measurement
Coldest point measurement
Automatic or manual control of color scale temperature range
°C, °F and K measurement units
High temperature alarm setting
Background temperature correction
Freeze the current image
Video output-NTSC or PAL system
TF card image storage
CMOS visible light image and storage
Voice notes
Isothermal alarm

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Temperature correction
Built-in common material specific emissivity selection table
OPTIONALS
Both LT3-P and LT7-P can be upgraded to use telephoto or wide-angle lenses;
LT7-P can be upgraded to use high temperature expansion lens to increase the high
temperature measurement range.
APPLICATIONS
Preventive maintenance
Power industry: thermal state inspection of transmission lines and power equipment,
fault and defect diagnosis.
-identify before the circuit overload occurs.
Building Science
Roof: Detect and detect water seepage quickly and efficiently.
Building structure: Infrared energy assessment survey for commercial buildings and
residential buildings.
Moisture detection: find the source of moisture and mold
Remediation: Evaluate remedial measures to ensure that the area is completely dry.
Other applications
iron and steel industry: monitoring of steelmaking and rolling processes, diagnosis of
hot blast furnace damage, detection of the temperature of the plate blank, etc.
Fire protection: Forest fire prevention and potential fire source search, spontaneous
combustion prevention test of special materials, electrical fire protection safety test
.Medicine: Human body surface temperature detection and temperature field
distribution analysis.
heat leakage and thermal insulation structure, power equipment condition inspection, etc.

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1.1 STANDARD ACCESSORIES
Thermal imaging camera (handrail)
Carrying case
AV line
Li battery(2)
Battery charger
Lens cover
User manual, analysis system CD
TF card
TF card reader
1.2 Optional accessories
0.25 X lens wide-angle extended lens (LT7-P only)
0.5 X lens wide-angle extended lens
2x lens telephoto extended lens
4x telephoto extension lens (LT7-P only)
Sun visor
Adapter
User manual,t analysis system manual
Portable backpack
Multi-function charger (can be connected: European standard, British standard and
Australian standard plugs, car power cord)
2Introduction for camera
2.1 Function keys

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[1] Switch
Used to turn on and turn off the thermal imager. Press this switch for more than three seconds to
turn on/off the thermal imager.
! Atention :It is recommended to wait at least ten seconds after turning off and turning on the
camera again to ensure the safety of the thermal imager.
[2] Selection/Auto key (markedA)
The button marked A has the following three functions.
a) The first function is to modify the selected parameters. Perform this function by quickly
pressing (less than 2 seconds) and releasing the button to modify the selected parameter. Each time
you press this key to select the next parameter, the selected parameter will be marked in yellow.
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This feature includes:
Temperature measurement points, lines and areas
Point, line and area-switch the points, lines and areas added on the interface from top to
bottom. Press the menu key to pop upthe attribute box, press the "C" keyto delete the selected
temperature measurement object。
Persudo color
When the color code is selected, press the up and down keys to switch the selectable color code.
The selected color code will become the color code of the current image in about three seconds and
will be the default color code of the next startup.
Persudo Upper and lower limit
When the upper and lower limits of the color code are selected, press the left and right keys to
increase or decrease the temperature range of the upper and lower limits of the color bar; press
the up and down keys to shift the temperature range corresponding to the color code. If you
modify any of these parameters in automatic mode, it will become manual mode.
b)The second function is to force zero adjustment. Press the Akey for more than 5 seconds,
the thermal imager will automatically calibrate to obtain accurate measurements.
[3] Cancel/Visible light Button(Tag C)
Press the button to cancel the current menu operation in menu mode.
Press the button to return to the active mode in frozen image or playback mode.
Press the button to switch among thermal image, visible image and fusion in non-menu and
parameter modification mode.
Press the button to delete the measurement parameter when selecting a measurement
parameter such as a measurement point.
[4] Frozen/Saving (Tag S)
To freeze or save images. Press the button once to freeze the image, press the cancel button to

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return to the active mode, press the button twice to save the image. If the audio annotation function
or text annotation function is on, the annotation dialog box will pop out. Select the image or video
in file management, and press S button for the prompt whether to delete the item.
[5] Menu/OK Button
Include up, down, left, right and menu/enter()buttons. It has different functions in different
operation modes.
In menu mode, it is for menu selection, and up and down buttons for menu operation of the same
level. When there is no sub-menu, adopt the left and right buttons to switch options; when there is
a sub-menu, adopt the right button to enter into the next level of menu operation. Enter(in the
middle)button is adopted to confirm the selection and return to the upper level.
When a temperature measurement point is selected, press the menu button to pop out the attribute
dialog box, select from the four direction buttons to move the point.
When the temperature measuring line is selected, press OK button to pop out the attribute dialog
box. Press S button to switch the line position or length, and select from four direction buttons to
move the line position or change the length.
When the temperature measuring area is selected, press OK button to pop out the attribute dialog
box. Press S button to switch the area position or size, and select from four direction buttons to
move the area position or change the size.
Up, down, left and right buttons can also be defined as shortcuts. For details, refer to the definition
of trigger button.
[6] Trigger/Shortcuts
As a customize shortcut button, trigger button can be defined with the functions below:
Lighting –press the button to turn on light, and press again to turn off the light.
Temperature measurement point, temperature measurement area - press once to add a temperature
measurement point or area, and then press once to delete a temperature measurement point or area.
Image capture, record –press once to save the image or start recording.
Zooming –press once to zoom in or out the infrared image.
Increase or decrease LCD brightness - press once to increase or decrease LCD brightness.

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[7] Microphone
For voice annotation when saving images.
2.2 Interface
[1] USB Interface
The interface is for internal debugging.
[2] TF Card Slot
Adopt standard TF card, e.g. 8G TF card configured at random, for device upgrading and image
saving.
[3] Video Output
For video and audio output.
[4] Power Interface
External power input interface. DC12V power requirement. Positive central plug.
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3Basic Operation
3.1 Battery Installation and Replacement
3.1.1 Battery Loading/Unloading
Battery cartridge is in the handle of the device. Push the push button at the bottom of the battery
cover, switch out the battery buckle, and loaded or unloaded the battery.
When inserting the battery, please note that the end with contact spot should be inserted into the
battery compartment first.

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Close the battery cover. and use the device after hearing a "snap".
! Note: The device should adopt standard batteries, otherwise the mechanical or electrical
performance of the device may be damaged due to incorrect battery size or voltage.
3.1.2 Battery Replacement
When showing empty battery and blinking for about 1 minute and 50 seconds, the device displays
battery low prompt message, and will automatically shut down after about 10 seconds.
Shutdown Prompt
Replace the battery now.

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3.2 General Instructions on Safe Battery Use
The battery should be stored in the environment at a temperature between -20℃-20℃,due to
slight self discharge phenomenon during storage of battery, to avoid over discharge that may
occur during storage and affect the battery capacity, the battery should be fully charged for
storage and charged regularly. The following intervals should be adopted:
Ambient temperature is-20℃-20℃. Once every6 months;
Ambient temperature is20℃-45℃. Once every3 months;
Ambient temperature is45℃-60℃. Once every1 months.
The amount charged each time must exceed 50% of the battery capacity.
Battery should be charged at the environment temperature between0℃-40℃; charging at the
ambient temperature of 0℃will decrease the battery capacity; charging at ambient
temperature of over 40℃may cause over temperature and damage.
! Warning:
! Do not disassemble, extrude or stab the battery;
! Do not short circuit the external contacts of the battery;
! Keep the battery dry. Do not put it in fire or water;
! Do not put it in any place easily accessible to children;
! Please dispose waste batteries in accordance with regulations of local government.
3.3 Quick Start
3.3.1 Acquiring Thermal Image
At the completion of battery installation, press the power switch of the thermal imager
(for over 3 seconds) until the display of power-on screen. After about 50 seconds, the
device is initialized and enters the working status.
Open the lens cap, aim at the black body from 2 meters away, and adjust the focal length

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of the lens of the thermal imager, to make the target image clear.
Press "A" button for automatic calibration, to obtain favorable thermal image.
! Note: Unsharp focusing will lead to wrong measurement.
3.3.2 Temperature measurement
Move the target object to the cross temperature measuring point on the screen, the "XX"
displayed in the upper right corner of the screen is the temperature of the target at the
temperature measuring point. If you want to measure the temperature more accurately,
press the "A" key for 3 seconds and then measure.
If you want to perform detailed temperature measurement of the thermal image displayed
on the current screen, you can press the "S" key to freeze the image before analyzing it.
You can also press the "S" key for 3 seconds to store the thermal image for analysis.
When the target temperature is greater than or less than the upper or lower limit
temperature corresponding to the temperature measurement file position of the infrared
thermal imager, the screen temperature will display >XXX℃or <XXX℃to remind the
user.
If you need to modify the properties of the temperature measurement object, you should
select the temperature measurement object first, and then press the confirm key, and the
properties dialog box of the temperature measurement object will pop up on the screen.
The following figure is the attribute dialog box of temperature measurement point,
temperature measurement line and temperature measurement area:
Temperature measuring point properties dialog box
The properties of the temperature measuring point can be modified with the ratio of
radiation coefficient, distance and reference object, left and right keys to select left and
right, pressA key to switch up and down. When the "reference object" option is changed
to "on", the temperature value displayed by other temperature measurement objects is the
temperature difference between the temperature measurement point.

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Thermometer Properties Dialog
The properties of the temperature measuring line can be modified for the specific
radiation coefficient, distance, maximum temperature, minimum temperature, average
temperature, maximum temperature difference, cross point temperature and reference
object. Press the left and right keys to select left and right, and press the A key to switch
up and down. When the "reference object" option is changed to "on", the temperature
value displayed by other temperature measurement objects is the temperature difference
between the temperature measurement point.
Temperature measurement area properties dialog box
The properties of the temperature measurement area can be modified for specific radiation
coefficient, distance, maximum temperature, minimum temperature, average temperature,

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maximum temperature difference and reference temperature. Press the left and right keys to select
left and right, and press the A key to switch up and down. When the "reference object" option is
changed to "on", the temperature value displayed by other temperature measurement objects is the
temperature difference between the temperature measurement result of this temperature
measurement area
.!Attention:: Infrared thermal imager can only set one reference temperature measurement
target.
3.3.3 Thermal Image Saving
To save the current thermal image acquired, choose one of the four ways below:
Press OK button to pop out the floating panel menu, select the "Take Photo" option in the
menu, and the system will save the image automatically.
Press "S" button, and press this button again to save after the image is frozen.
Press "S" button continuously for 3 seconds to save the image automatically.
Press the Shortcut button to save the image by setting the shortcut as the "Take Photo"
option.
3.3.4 Thermal Image Playback
There are two ways to open a file:
1、Press OK button to activate the main menu, and select the file in the sub-menu of the "File
Management" menu (Select by up, down, left and right buttons).
2、Click the "Preview" option in the floating panel, to open the file for options (Switch
options by left and right keys).
When the image is opened, replace the current image saved by up and low buttons in the
playback control panel.
Press cancel button, to exit the playback status and return to the real-time temperature
measurement status.
3.3.5 Export of Saved Information
Handle the contents saved in TF card with a card reader, including image export, deletion, format
and other operations.
! Note: It is recommended to adopt the formatting function in the firmware software of the
thermal imager to format the TF card.
3.3.6 LCD Setting
Two setting methods: 1. Set the brightness of LCD screen by "LCD Brightness

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Adjustment" option in the general setting menu in the main menu, to achieve the best
display effect. 2. Set the shortcut button as "LCD Brightness Adjustment" option, to set
the brightness of the LCD screen.
3.3.7 Menu Operation Instruction
Keyboard operation: Press "OK" button to pop out the floating panel. Select the icon by left
and right buttons on the floating panel, and press "OK" button to enter relevant interface.
Main menu interface: select the menu icon by "Up, Down, Left and Right" buttons, and press
OK button to enter sub-menu.
Sub-menu interface: select by "up" and "down" buttons. If there is a ">" tag, right click to
enter sub-menu.
Parameter interface: press "up" and "down" buttons to modify, and press "left" and "right"
buttons to select.
< > refer to modify the setting in the current menu
Press "OK" button to confirm the modification, save and return to the previous menu, press
"C" button to cancel the modification and return to previous menu.
It is a switch button. Change the switch settings by left and right buttons.

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4 Opreation Guide
4.1 Operation Interface Description
4.1.1Graphic Interface of Working Status Screen of Thermal Imager
Graphic Interface of Working Status Screen of Thermal Imager
[1] Company Icon: Dali Technology company icon.
[2] Emissivity: Default emissivity set.
[3] Reference Temperature Measurement:Fixed temperature measurement for reference.
[4] Temperature Measurement Results: Display the temperature value of the temperature
measurement object (If the reference temperature measurement is set, the difference with the
reference temperature measurement will be displayed).
[5] Point Temperature Measurement Icon: Point temperature measurement cross cursor.
[6] System Time: The system time displayed by the current device.
[7] Minimum Temperature:The minimum temperature value of the color code.
[8] Persudo color: Persudo bar. After selecting it, press the up and down keys to switch the color
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This manual suits for next models
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Table of contents
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