
 User Manual 
IRTC400 
Thermal Imager 
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Introduction 
Congratulations on your purchase of the Triplett IRTC400 
Thermal Imaging Camera. This instrument is useful in many 
applicaons such as preventave maintenance, 
troubleshoong of electrical and HVAC systems, mechanical 
breakdowns, water leaks and moisture buildup, heat loss from 
missing insulaon and faulty windows/doors, automove 
repair, and other places tond leaks and hot spots. With 
proper care the instrument will last for many years of 
accuracy and service. 
Features 
•  2.4” (61mm) focus-free, color TFT display with 320 x 240 resoluon 
•  Center spot and high/low temperature tracking on image 
•  Audible and visual user programmable high/low temperature alarms 
•  4-buon easy-to-use menu 
•  Real me clock/calendar 
•  Image gallery 
•  Built-in LED worklight 
•  Auto power o with disable 
•  USB interface for transferring images (.bmp) and recharging 
•  Includes 3.7V rechargeable Lithium-Ion bery, USB cable, soware, 
and 32G microSD card 
Safety 
Internaonal Safety Symbols This symbol, adjacent to another symbol or 
terminal, indicates the user must refer to the manual for further 
informaon. Cauons o Improper use can damage the meter. Please read 
and understand all of the informaon provided in this User Guide and 
other included documentaon before use. o Use extreme cauon when 
the laser pointers are on. o Do not point the beam toward anyone's eye or 
allow the beam to strike the eye from a reecve surface. o Do not use 
the laser near explosive gases or in other po 
Refer to the CAUTION statement label (shown below) for crical safety 
informaon. 
tenally explosive areas. o 
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Meter Description 
1. Upper Housing 
2. Interface Protecve Cover 
3. Lower Housing 
4. USB Type-C Interface Connector 
5. SD Card Slot 
6. Tripod Mount 
7. Laser Emission Window 
8. LED Light 
9. Infrared Camera Lens 
10. Trigger/Image Capture 
11. LCD Display 
12. OK Buon 
13. Up Buon 
14. Power/Back Buon 
15. Down Buon 
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Display Indicators and Icons 
•  Display size: 2.4" (495mmx377mm) 
•  Display resoluon: 320 (vercal) x 240 (horizontal) 
1. Center Point Temperature 
2. CenterPoint  
3. Low Temperature Point 
4. Date and Time 
5. Baery Status 
6. Temperature Bar 
7. High Temperature Point 
Operation 
Power On/Off 
When the thermal imager is not turned on, long press the power buon 
for 3s to power on. When the thermal imager is in the suspend state, 
short press the power buon for 1 s to power on. When the 
imager is turned on, short press the power buon for 1s to enter the 
suspend state. Long press the power buon for 8s, 
 thermal 
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Menu 
 Short press the OK button to enter the menu interface. Short press the 
Back button to return to the upper menu. Short press the trigger to 
directly return to the main interface of the thermal imager. 
Image View 
 In the menu, select Image View, and then 
short press the OK button to enter the 
image viewing interface. Press the 
Up/Down button to select an image. 
Press the OK button twice to view the 
Picture Info or Delete images. 
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Temperature Mark 
In the menu, short press the Up/Down button to select Temper Mark, and 
then short press the OK button to enter the temperature mark interface. 
Center Point Hi/Lo Point Palette/Date & Time can be set in this interface. 
For example, select Center Point, and then press the OK button to turn 
on/off this function. 
HI/LO Alert 
 In the menu, short press the Up/Down button to select HI/LO Alert, and 
then short press the OK button to enter the alert setting interface. 
Temper Alert, Buzzer, HI Alert and LO Alert can be set in this interface. 
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LED light 
 In the menu, short press the Up/Down button to select Hand Light, and 
then short press the OK button to turn on/off the flashlight. 
Palette 
In the menu, short press the Up/Down button to select Palette, 
and then short press the OK button to enter the palette selection 
interface. Short press the Up/Down button to step through six 
palettes: Rainbow, Iron, White Hot, Black Hot, Rainbow HC, Lava, 
and short press the OK button to confirm the selected palette. 
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Language (English Only) 
Temperature Unit 
 In the menu, short press the Up/Down button to select Setting, 
and then short press the OK button to enter the submenu. In the 
submenu, short press the Up/Down button to select Temper Unit, 
and short press the OK button to switch between °C/°F. 
Measured Parameters 
 In the menu, short press the Up/Down button to select setting, 
and then short press the OK button to enter the submenu. In the 
submenu, short press the UP/Down button to select Emissivity or 
Temperature Compensation, and short press the OK button for 
settings. 
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Laser 
In the menu, short press the Up/Down button to select 
Setting, and then short press the OK button to enter the 
submenu. In the submenu, short press the Up/ Down button 
to select Laser, and short press the OK button to turn on/off 
the laser. 
Time & Date 
 In the menu, short press the Up/Down button to select Setting, 
and then short press the OK button to enter the submenu. In the 
submenu, short press the Up/ Down button to select Time & Date, 
and short press the OK button to enter the setting interface. The 
Time Format can switch between 12H and 24H. Press the 
Up/Down button to adjust the value of time and date, and short 
press the OK button to confirm. 
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Brightness 
 In the menu, short press the Up/Down button to select Setting, 
and then short press the OK button to enter the submenu. In the 
submenu, short press the Up/ Down button to select Brightness, 
and short press the OK button to enter the setting interface. The 
brightness can be Low, Middle, or High 
Auto Power Off 
In the menu, short press the Up/Down button to select Setting, 
and then short press the OK button to enter the submenu. In the 
submenu, short press the Up/ Down button to select Auto Power 
Off, and short press the OK button to enter the setting interface. In 
this interface, users can set the auto power off time (5/ 10/30min) 
or turn off the auto power off function. 
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Auto Save 
 In the menu, short press the Up/Down button to 
select Setting, and then short press the OK button to 
enter the submenu. In the submenu, short press the 
Up/ Down button to select Auto Save. Short press the 
OK button to turn on/off the auto save function. 
Format SD 
In the menu, short press the Up/Down button to select Setting, 
and then short press the OK button to enter the submenu. In the 
submenu, short press the Up/ Down button to select Format SD 
and short press the OK button to enter the setting interface. Press 
the OK button select Yes or No 
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Factory Reset 
In the menu, short press the Up/Down button to select 
Setting, and then short press the OK button to enter the 
submenu. In the submenu, short press the Up/ Down button 
to select Factory Reset and short press the OK button to 
enter the setting interface. Press the OK button select Yes or 
No. In this picture, it will jump back to the main interface 
when you touch the screen. 
USB Communication and PC Analysis Software 
 1. Please refer to the instructions to download and install the PC 
software. 
 2. Connect the USB data cable to the computer. Users can view 
images and analyze data via the PC software. 
 3. To use the PC software correctly, please read the Software User 
Manual. 
 4. During USB communication, do not directly unplug the USB 
cable. If users want to disconnect the device when it has been 
successfully connected to the computer, they can select Remove 
Device in the lower right corner of the computer. 
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Maintenance 
Use a wet cloth or weak soap solu�on to clean the outer shell of 
the device. Do not use abrasives, isopropyl alcohol or solvents to 
clean the outer shell, lens or window. 
Specifications 
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Warranty 
Triplett / Jewell Instruments extends the following warranty to the 
original purchaser of these goods for use. Triplett warrants to the 
original purchaser for use that the products sold by it will be free 
from defects in workmanship and material for a period of (1) one 
year from the date of purchase. This warranty does not apply to any 
of our products which have been repaired or altered by unauthorized 
persons in any way or purchased from unauthorized distributors so 
as, in our sole judgment, to injure their stability or reliability, or which 
have been subject to misuse, abuse, misapplication, negligence, 
accident or which have had the serial numbers altered, defaced, or 
removed. Accessories, including batteries are not covered by this 
warranty 
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