Dali LT3 User manual

LT3/LT7
Thermal Image Camera
User Manual
ZHEJIANG DALI TECHNOLOGY CO LTD

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LT3/LT7 Thermal Image Camera User Manual
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Warnings, Cautions and Notes
Definitions
 WARNING Could cause bodily injury or death.
 CAUTION Could cause damage to equipment or permanent loss of data.
 NOTE provides useful information to the operator.
Important Information-Read before using the Instrument
WARNING - Laser Radiation is emitted from this device. Do Not stare into Laser
Beam. Class 2 Laser, 635 nm, 0.9mW.
CAUTION - Never point the lens directly toward a strong radiation source (ie. Sun,
direct or reflected laser beam, etc ), with power on or power off, as damage may
result to the thermal detector used inside. Permanent damage may result!
CAUTION - The original shipping carton should be kept for use for future
transportation. Do not drop, shake or impact the thermal imager excessively, in use
or during transportation.
CAUTION - Store the unit in its original case in a cool, dry, well-ventilated area
away from strong electromagnetic fields.
CAUTION - Protect the surface of the lens from being stained or damaged by
foreign objects such as sludge or chemicals. Please replace the lens cap after use.
CAUTION - Please remember to backup image data regularly to avoid losing
important data.
NOTE - For maximum measurement accuracy, allow 3 to 5 minutes for camera to
stabilize after initial power up.
NOTE - Each camera is factory calibrated. It is recommended that calibration be
performed every 12 months.
CAUTION - Do not open case. Unit does not contain any user serviceable parts.
Repair should be performed by factory authorized technicians only.

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Contents
Warnings, Cautions and Notes 1
1 Introduction 4
1.1 Standard accessories 6
1.2 Optional accessories 6
2 Camera overview 7
2.1 Function keys 7
2.2 Interface 11
3 Basic operation 12
3.1 Battery Installation and Replacement 12
3.1.1 Inserting or removing battery 12
3.1.2 Replacing battery 13
3.2 Battery safety and usage 14
3.3 Quick access 15
3.3.1 Capture an image 15
3.3.2 Temperature measurement 15
3.3.3 Freeze and save image 16
3.3.4 Viewing stored Images 16
3.3.5 Export saved images 17
4 Operation guide 18
4.1 Graphic interface description 18
4.1.1 Screen graphic interface 18
4.1.2 Main menu 19
4.1.3 Dialog box 19
4.1.4 Prompt box interface 20
4.2 Measurement 20
4.3 Auto/Manually 21
4.4 Setup menu 22
4.4.1 Measuring Setup 22
4.4.2 Adjustment setup 23
4.4.3 Analysis setup 24
4.4.4 Date/Time setup 25

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4.4.5 System setup 25
4.4.6 System Info 27
4.4.7 Factory Default 27
4.5 File 28
4.5.1 Open 28
4.5.2 Save 29
4.5.3 Save Setting 31
4.5.4 Auto Save 32
4.5.5 Delete 32
4.5.6 Format 33
5 Technical specifications 34
Troubleshooting 36
Appendix A 37
Common material emissivity（FYI） 37
Appendix B 38
Factory default parameter setting table 38

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1 Introduction
Thank you for choosing DALI Instruments “LT3” or “LT7” hand-held
infrared thermal imager.
Model Identification
LT3 imagers use the detector with 25um 160×120, and measurement range
from -20℃～ +350℃
LT7 imagers use the detector with 25um 384×288, and measurement range
from -20℃～ +650℃
Features
LT3\LT7 include the following features:
User selectable Auto or manual level and span control
℃ , ℉or K measurement scale
11 user selectable color palettes
9 user selectable languages
Hot temperature spot measurement
Cold temperature spot measurement
4 removable spot measurements
High temperature Alarm setting
T Reflect - Reflected temperature compensation
2X digital zoom
Freeze screen for viewing current image
Video Output NTSC or PAL
3 Areas measurements
2 lines measurements
Image storage via TF card
CMOS visible image and storage
Audio recording
Isotherm Alarm
T Correct Measurement Offset correction
Built in Emissivity Table list of common materials

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Upgrades and Options
LT3&LT7 Series models are factory upgradeable for Wide Angle or Telephoto
Lenses.
Applications:
Preventive maintenance
 ● Power industry: Power line and power facility thermal state checking;
problem and defect diagnosis.
 ● Electrical system: Identify potential circuit overloads.
 ● Mechanical system: Reduce downtime and avoid catastrophic failure.
Construction science
 ● Roof: Quick identification of water penetration problems.
● Structure: Commercial and residential energy audits.
 ● Moisture detection: Determine root cause of moisture and mildew.
● Evaluation：Evaluate the resolution to ensure the area completely dry.
Others
● Iron and steel industry: Inspect steel refining and rolling processes; diagnose
hot-blast stove defects; detect the embryo temperature of armor plate, etc.
● Fire fighting: Forest fire prevention and detection of latent ignition source.
Preventive detection on specific materials of auto-ignition. Detection of potential
spark ignition sources.
 ● Medical: Human body surface temperature detection and screening.
 ● Petro/chemical: Oil pipeline status inspection; material surface temperature
detection; insulation inspection; power equipment status, etc.

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1.1 Standard accessories
 Infrared thermal image camera (with wrist strap)
 Carrying case
 Video out cable
 Lithium batteries（2）
 User manual, Infrared report and analysis software system CD
 Lithium battery charger
 Lens cap
 TF card
 TF card reader
 USB cable
1.2 Optional accessories
 External 0.5x wide-angle lens
 External 2x telescopic lens
 Sun Shield patch
European standard plug, British standard plug, Australia standard plug
 Power adapter（with power cable and plug）
 User Manual, Report Software User Manual

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2 Camera overview
2.1 Function keys

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[1] Power key
Press and hold the Power Key for > 3 seconds to power on/off the camera.
Note: After powering off, please wait ten seconds before powering the camera on
again.
[2] Select/Auto key (Marked “A”)
The “A” or attribute button performs 2 functions.
a) The first function is modification of selected parameters. It is obtained by a quick
press and release (less than 2 seconds), with this functions to modify their parameters.
Subsequent presses will “scroll” through the available parameters. The selected
function will be highlighted in yellow. The functions include:
● Measurement points, areas, and lines
Cursors and lines - pressing the arrow keys will move their position. Pressing the
Menu key will pop up the attribute box. Pressing the C key will delete the selected
parameter.
Areas – Arrow keys adjust the attribute specified in the pop up attribute box.
Pressing the Menu key will pop up the attribute box. In this box, the user can select to
adjust either position or size of the area. After selection, the arrows will then adjust the
attribute.
● Color Palette
Pressing the left or right arrows will scroll through the available color palettes,
displaying their name above the palette. The selected palette will become active after
about 3 seconds of selecting it and will be set as the default power on palette.
● Level/Span values
Pressing the left or right arrow will reduce or increase the Span and pressing the up
or down arrow will reduce or increase the Level. If the unit is in Automatic mode,
modifying any of these parameters will select Manual mode.
b）The second function performed is to force an internal calibration cycle. This is
performed by pressing and holding the A key for 5 seconds or more. The camera will
make automatic correction to get the most accurate thermal measurement.
[3] Cancel/Camera key (Marked “C”)
● Pressing and releasing the C key cancels the present operation when in Menu
mode.
● Pressing and releasing the C key when an image is frozen or being viewed from

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memory, will return to real-time measurement status.
● When not in menu mode or parameter editing, pressing and releasing the C key
will toggle between the thermal image and the visible CCD camera image.
● When a parameter is selected, such as a measurement cursor, pressing the C key
will delete the highlighted measurement.
[4] Freeze/Save key (Marked “S”)
Used for freezing or saving thermal image. Press the key once to freeze the image.
Press Confirm to save the image or Press C to return to real-time measurement. If Voice
recording is enabled, Voice comment dialog box will display.
[5] Menu/Confirm key (bar)
Includes Up, Down, Left, Right and Menu/Confirm (center) keys. Function varies
with operation mode.
In Menu mode, it is used for menu selection. Up and Down keys are for same level
of menu operation. Left and Right keys are for different levels menu operation. Confirm
key (center) is to activate the menu and confirm the choice.
In Image mode, press Up or Down key to activate X2 digital zoom. The screen will
display “X2” in the upper left corner. Press Up or Down key to return to the original
image.
In Spot Measurement editing mode (activated immediately after adding a spot or
by selecting via the A key), press the Menu key to pop up the attribute box. Press four
navigation keys to move the spot location.
In line temperature measurement editing mode (activated immediately after adding
a line or by selecting via the A key), press the Menu key to pop up the attribute box.
If measurement line is horizontal, press Up and Down keys to move the line location;
press Left and Right keys to move the reference line. If measurement line is vertical, press
Left and Right keys to move the line; press Up and Down keys to move the reference
line.
In area measurement editing mode (activated immediately after adding an area or
by selecting via the A key), press the Confirm key to pop up the attribute box. Select
in the attribute box the parameter to be edited, either size or position. Press the four
navigation keys to move the area location or change the size of the area.
[6] Trigger/Shortcut key
The trigger key serves as a shortcut to access the following functions:

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Laser – Pulling trigger activates laser sight and releasing deactivates it.
Spot– Pulling and releasing trigger adds a spot. Pulling and releasing trigger again
removes the spot.
Area –Pulling and releasing trigger adds an area. Pulling and releasing trigger again
removes the area.
Save – the same with “S” key, pressing to initiate a Save cycle.
IR/CCD - Pulling and releasing trigger toggles between the IR image and the CCD
image.
[7] Microphone
Used for recording a voice message with the Saved image. See Section 4.5.3 for
details.

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2.2 Interface
[1] USB output
Inserting USB cable to this port and connecting to computer for data transmission
(only support USB2.0).
[2] TF Card slot
Accepting standard size TF card such as supplied 2GB capacity card, for device
upgrade or image storage.
[3] Video port
It is a video output interface.
[4] Power interface
External power input interface. Power source should be +12VDC. Center pin is
positive terminal.

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3 Basic operation
3.1 Battery Installation and Replacement
3.1.1 Inserting or removing battery
Battery compartment is located inside the handle. Turn the cover counter-clockwise
to remove. Remove battery for replacement.
Insert the battery (the battery contacts must face into the battery compartment).

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Replace the cover and screw down.
CAUTION: Use only original manufacturer replacement battery. Use of incorrect
battery may result in physical or electrical damage to the instrument due to incorrect
voltage or physical size difference.
3.1.2 Replacing battery
When battery has approximately 5% charge remaining, the warning will be displayed
and the instrument will turn off in approximately 3 seconds.

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Powering off display
It’s better to replace batteries now.
3.2 Battery safety and usage
→Batteries should be stored in an ambient temperature of -4 ℉ (–20℃) to
67.9 ℉ (+20℃). Lithium batteries will self-discharge during storage, so they should be
fully charged before storage. Self-discharge may affect long term battery performance.
Furthermore, it is recommended that the battery should be charged in a set time, as
below;
Ambient temperature of:
● -4 ℉ (–20℃ ) to 67.9 ℉ (+20℃ ), once every 6 months
● 67.9 ℉ (+20℃ ) to 113 ℉ (+45℃ ), once every 3 months
● 113 ℉ (+45℃ ) to 149 ℉ (+60℃ ), once every month
→Battery should have greater than 50% charge prior to recharge.
→ The ambient temperature for charging should be 32 ℉ (0℃) to 104 ℉
(+40℃). If under 32 ℉ (0℃), the battery capacity will be diminished; if over 104 ℉
(+40℃), the battery may overheat, resulting in permanent damage.
WARNING:
● Never disassemble, incinerate or puncture battery
● Never short circuit the battery
● Keep battery dry
● Keep out of reach of children
● Always dispose of battery in accordance with local, state and federal regulations

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3.3 Quick access
3.3.1 Capture an image
● After installing the battery, press and hold the power key ( ≥ 3 seconds) until the
display comes on. After approximately 50 seconds, the power on routine will finish and
the camera will start its measurements.
● Remove the lens cap and aim at the target. Adjust the focus for the clearest target
thermal image.
NOTE: Failure to properly focus the camera will result in increased measurement
error. When the image quality become worse or ghost image appeared, please press
button A for a long time to compulsion in force.
3.3.2 Temperature measurement
● If no measurement cursors are on screen, add a measurement spot, area or line by
pressing MENU and selecting Measurement. Press CONFIRM and scroll left or right
to select the proper measurement parameter. Aim the cursor indicator onto the target
object on the screen. The temperature will be displayed in the upper right corner of the
screen. For highest accuracy measurements, force a calibration cycle by pressing the A
key for 5 seconds until “Calibrating” appears in upper left portion of display.
● If you want to measure the current thermal image in detail, press S key to freeze the
image for on-screen analysis. Save the image if future analysis is desired. For details, see
Section 4.
● If the target object’s temperature is lower or higher than the limits of the camera,
it will display <XXX° or >XXX° with XXX being the min or max temperature of the
selected range.
● To modify the measurements attributes, select the measurement parameter, and
then press the Confirm key. The screen will display the settings dialog box. The below
figures are spot, line and area measurement respectively.

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Spot settings include emissivity and reference temperature. When Set Ref is
set as Yes, the displayed values of other measurements will be their delta from this
measurement.
Line settings only include the emissivity.
Area settings can modify the emissivity, area measurement type and area move
parameter. Measurement types are Min Temp, Max Temp or Average Temp. Area
Move parameter choices are Position or Size. The selected parameter will be adjusted by
the directional arrow keys. When “Set Ref” is set as Yes, the displayed values of other
measurements will be their delta from this measurement.
3.3.3 Freeze and save image
Press S key to freeze the image and select “C” to exit the operation.
There are three ways to save the image:
● Press S key to freeze the image and then select “Save” to save the image, or select
“Cancel” to exit the operation.
● Press Menu key to activate the main menu. Choose File->Save and the system will
initiate the save cycle.
● With the “Trigger” parameter, located in Setup->Sys. Setup->Trigger, set to “Save
Key”, pulling and releasing the trigger key will initiate the save cycle.

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3.3.4Viewing stored Images
● Press Menu key to activate the main menu. Choose File->Open to open the image.
● When image is opened, choose Left or Right keys to select the previous or next
images respectively.
● If the instrument is in IR mode, it will display all IR images of each saved image, it
will display “No Image” if there is no IR image for that saved image.
● If the instrument is in CCD mode, it will display all CCD images of each saved
image, it will display “No Image” if there is no CCD image for that saved image.
● If the trigger is configured to IR/CCD mode by Setup->Sys. Setup->Trigger, when
in image view, the trigger can switch between IR and CCD images for each saved image.
it will display “No Image” if there is no IR or CCD image for that saved image.
● Press C key to exit the Image view mode and return to the real-time measurement
mode.
3.3.5 Export saved images
● Use of USB port to download images in TF card. With a standard USB cable,
connect device port to PC and export saved images.
● Remove the TF card and insert into TF card reader, connect to USB port on PC
and export saved images.

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4 Operation guide
4.1 Graphic interface description
4.1.1 Screen graphic interface
[1] Company logo: DALI
[2] Operating status: displays the current operational status.
[3] Spot temperature measurement: White crosshair.
[4] Selected spot temperature: Yellow crosshair, and show by“*” .
[5] Emissivity: Indicates Imagers emissivity setting.
[6] Minimum temperature: Indicates minimum value of the palette.
[7] Palette: Palette bar. User can choose different palettes.
[8] Maximum temperature: Indicates maximum value of the palette.
[9] Battery status: Indicates the current battery status.
[10]、[11] Result: Indicates the temperature value of the target object. Black and
yellow denotes the temperature value of the selected object.
[12] Temperature unit: Three options: ℃ , ℉ or K.
[13] External lens symbol: Displays “0.5x” for wide-angle or “2x” for
telephoto lens.
[14] SD card symbol: Displays “TF” when TF card is installed.
[15] Digital zoom symbol: Displays “X2” when digital zoom is activated.
NOTE: Not all models have all functions, so the working status screen may not
show all features.

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4.1.2 Main menu
[1] Main menu: Displays four options: Measurement, auto/manually, Setup, and
File.
[2] Low-level menu: The > indicates a low-level menu is available, accessed by the
right arrow key.
4.1.3 Dialog box
[1] Dialog box name：Displays the dialog box name, e.g. Measuring Setup.
[2] Item title：A dialog box may contain several items, such as Temp Range.
[3] Item content：Items show specified content. Black means valid or changeable
and white means invalid for this selection.
[4] Unit：Indicates the current selected temperature unit.