CEM DT-986H User manual

Operating Instruction for
256 x 192 Pixels Thermal Imager
Please read this manual before switching the unit on.
Important safety information inside.

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Operating Instruction for Thermal Imager
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Content
1.Introduction.................................................................................
2.Safety Information.......................................................................
3.Specifications..............................................................................
4.Structure Description....................................................................
5.Before You Start............................................................................
5-1.How to Charge the Battery.......................................................
5-2.Power On.................................................................................
5-3.Power Off................................................................................
5-4.Desktop...................................................................................
5-5.Focus......................................................................................
5-6.Shutter....................................................................................
5-7.Temperature Measurement........................................................
5-8.Emissivity Adjustment.............................................................
5-9.Reflected Temperature............................................................
5-10.Thermal Imager Reporter Software.........................................
6.Menus..........................................................................................
6-1.Main Menu..............................................................................
6-2.Image Mode.............................................................................
6-3.Image Palette..........................................................................
6-4.Image Adjustment...................................................................
6-4-1.Lock Operation...................................................................
6-4-2.Histgram Mode and Auto Mode...........................................
6-5.Measurement Menu.................................................................
6-6.Parameter Menu......................................................................
6-6-1.Ambient Temperature Composation.....................................
6-6-2.Reflective Temperature.......................................................
6-6-3.Atmospheric Humidity........................................................
6-6-4.Delta Temperature Compesation.........................................
6-6-5.Distance............................................................................
7-6-6.Emissivity..........................................................................
6-7.Settings Menu.........................................................................
6-7-1.Device Setting...................................................................
6-7-2.Measure Setting................................................................
6-7-3.Reset................................................................................

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Operating Instruction for Thermal Imager
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Content
6-8.Camera Menu..........................................................................
6-8-1.Save Image........................................................................
6-8-2.Add Text Note....................................................................
6-8-3.Change Measure Parameters..............................................
6-8-4.Add Analyse Tools..............................................................
6-8-5.Change Image Mode...........................................................
6-8-6.Change Color.....................................................................
6-9.Video Menu.............................................................................
6-10.Files Browser........................................................................
6-10-1.Analyse an Image.............................................................
6-10-2.Play a Video.....................................................................
6-10-3.View Image Info...............................................................
6-10-4.Delete a File....................................................................
6-11.USB Mode...........................................................................
7.Fault Diagnosis and Exclusion.......................................................
8.Android/iOS APP Thermview..........................................................
8-1.Software Install and Uninstall.................................................
8-1-1.System Required................................................................
8-1-2.Thermoview App Install......................................................
8-2.Thermview Function.................................................................
8-2-1.Import Pictures..................................................................
8-2-2.Analyse..............................................................................
8-2-3.Report and Share...............................................................
9.PC Software.................................................................................
9-1.System Required.....................................................................
9-2.IRMeter Install........................................................................
9-3.Running..................................................................................
9-4.Uninstall.................................................................................

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Operating Instruction for Thermal Imager
1.Introduction
• The Thermal Imager is handheld imaging camera used for predictive maintenance, equipment troubleshooting
and verification.
• Focus the len to the object, Then the thermal and visual images are displayed on the LCD and can be saved to a
Micro SD Memory card.
• Transferring images to a PC is accomplished by removing the SD memory card and connecting it to a PC through
the included card reader, or transfer the images and video stream to the smart device with “Thermoview” apps
installed.
• In addition to the features mentioned above, the Thermal Imager provide video recording and play back
2.Safety Information
• To prevent eye damage and personal injury, do not look into the laser. Do not point laser directly at persons or
animals or indirectly off reflective surfaces.
• Do not disassemble or do a modification to the Thermal Imager.
• Do not point the Thermal Imager (with or without the lens cover) at intensive energy sources, for example devices
that emit laser radiation, or the sun.
• This can have an unwanted effect on the accuracy of the camera. It can also cause damage to the detector in the
Thermal Imager.
• Do not use the Thermal Imager in a temperature higher than 50°C (122°F), lower than -20°C (-4°F), High
temperature or low temperature can cause damage to the Thermal Imager.
• Only use the correct equipment to discharge the battery.
• If you do not use the correct equipment, you can decrease the performance or the life cycle of the battery, If you
do not use the correct equipment, an incorrect flow of current to the battery can occur, This can cause the battery
to become hot, or cause an explosion and injury to persons.
• Do not pull out the battery when the thermal imager is working.
• If you pull out the battery when the thermal imager is working, it may cause the thermal imager work unnormal.
• Do not disassemble or do a modification to the battery.
• The battery contains safety and protection devices which, if they become damaged, can cause the battery to
become hot, or cause an explosion or an ignition.
• If there is a leak from the battery and the fluid gets into your eyes, do not rub your eyes, Flush well with water
and immediately get medical care.
• Do not make holes in the battery with objects, Do not hit the battery with a hammer, Do not step on the battery,
or apply strong impacts or shocks to it.
• Do not put the battery in or near a fire, or in direct sunlight, or other high-temperature locations, Do not solder
directly onto the battery.
• Always charge the battery in the special temperature rang.
• The temperature range through which you can charge the battery is 0 to 50°C (32 to 122°F), If you charge the
battery at temperatures out of this range, it can cause the battery to become hot or to break, It can also decrease
the performance or the life cycle of the battery.

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Operating Instruction for Thermal Imager
• Do not get water or salt water on the battery, or permit the battery to get wet.
• Clean the case with a damp cloth and a weak soap solution. Do not use abrasives, isopropyl alcohol, or solvents
to clean the case or lens/screen.
• Be careful when you clean the infrared lens, Do not clean the infrared lens too vigorously, This can damage the
anti-reflective coating.
• Take the Thermal Imager from from cold to hot, it will appear condensation in thermal Imager, To protect the
Thermal Imager, you should power of the Thermal Imager, wait until the Thermal Imager has become war enough
for the condensation to evaporate.
• If you do not use the Thermal Imager, put the Thermal Imager in cool and dry environment, if you store Thermal
Imager equipped with the battery, the power of the battery will be exhausted.

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Operating Instruction for Thermal Imager
3.Specifications
Imaging and Optical Data
Field of View (FOV)/Minimum Focus Distance
Spatial Resolution (IFOV)
Thermal Sensitivity/NETD
Image Frequency
Focus Mode
Zoom
Focal Length
Focal Plane Array (FPA)/Spectral Range
IR Resolution
Image Presentation
Display
Image Modes
Color Palettes
Measurement
Object Temperature Range
Temperature Accuracy
Measurement Analysis
Spot
Automatic Hot/Cold Detection
Line
Area
Measurement Corrections
Storage of Videos
Storage Media
Video Storage Format
Video Storage Mode
Storage of Images
Image Storage Format
Image Storage Mode
Image Analyse
Set-Up
Set-up commands
Languages
56°x 42°/0.5m
3.75mrad
<0.1°C at 30°C (86°F)/100mK
25Hz
Focus Free
1-16x continuous, digital zoom.
3.2mm
Uncooled microbolometer/8-14µm
256x192 pixels
3.5in. LCD, 640x480 pixels, Touch screen
IR image, Visual image, Picture in picture, Auto fusion, zoom.
IRON, Rainbow, Grey, Grey Inverted, Brown, Blue-red, Hot-cold,
Feather, Above alarm, Below alarm, Zone alarm, Vision zone.
-20 to 550°C (-4 to 1022°F)
±2°C (3.6°F) or ±2% of reading (Environment temperature 10 to 35°C,
Object temperature >0°C).
Center Spot, Three manual spots
Auto hot or cold markers
Two lines analyse
Three areas analyse
Emissivity, Reflected temperature
8Gbytes Micro SD card or 3.4GB internal EMMC.
Standard MPEG-4 encode, 640x480 at 30fps, on memory card >60
minutes.
IR/visual images; simultaneous storage of IR and visual images.
Standard JPEG,or HIR files including measurement data, on memory
card >6000 pictures.
IR/visual images; simultaneous storage of IR and visual images.
Internal image analyse tools, Complete function.
Local adaptation of units, language, date and time formats,
information of camera
Multinational

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Operating Instruction for Thermal Imager
Digital Camera
Built-in Digital Camera
Built-in Digital Lens Data
Data Communication Interfaces
Interfaces
USB
Wifi
Power System
Battery
Input Voltage
Charging System
Power Management
Environmental Data
Operating Temperature Range
Storage Temperature Range
Humidity (Operating and Storage)
Drop Test
Bump
Vibration
Physical Data
Camera Weight, Incl. Battery
Camera Size (L x W x H)
2 Megapixels
FOV 65°
USB-Type C
Data transform between camera and PC; Live video between camera
and PC
802.11, transfer images and realtime video stream
Li-ion battery, 4 hours operating time
DC 5V
In camera (AC adapter)
Automatic shutdown
-15 to 50°C (5 to 122°F)
-40 to 70°C (-40 to 158°F)
10% to 90%
2m
25g (IEC60068-2-29)
2g (IEC60068-2-6)
<500g
224 x 77 x 96mm

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Operating Instruction for Thermal Imager
4.Structure Description
1-Visual Camera
2-Infrared Camera Lens
3-Dust Cover Lanyard Hole
4-Trigger
5-Interface and Cover
5.1-Type-C USB/Charge
5.2-Micro SD Card Slot
6-LCD Display and Touch Screen
7-Images Browse Button
8-Power/Lock Button
9-Menu/Select Button
10-Up/Down/Right/Left Button
11-Battery
12-Triangular Bracket Fixed Hole
5.2
5.1
1
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Operating Instruction for Thermal Imager
5.Before You Start
5-1.How to Charge the Battery
• Before you use the Thermal Imager for the first time, charge the battery for three and three-half hours.
• The battery status shows on the six-segment charge indicator.
• To charge the battery, use follow before:
1.Connect the ac power adapter into an ac wall outlet and connect the dc output to the Thermal Imager’s ac power
socket, the charge light is on, The battery indicator becomes “ ” while the battery
charges with the ac power adapter.
2.Charge until the charge indicator becomes “ ”, the charge icon not changed.
3.Disconnect ac power adapter when the battery is full charged.
Note: Make sure that the Thermal Imager is near room temperature before you connect it to the charger. Do not
charge in hot or cold areas. When you charge in extreme temperature, battery capacity may be decreased.
5-2.Power On
To turn the Thermal Imager on, push the Power/Lock “ ” Button about 2 seconds.
Note: After power on the device, the thermal Imager needs sufficient warm-up time for the most accurate
temperature measurements and best image quality. So the visible image will first appear, and the thermal sensor
will calibrate internal for sevearal seconds. After that the thermal image will be displayed on the screen.
Professional thermal imager
Professional thermal imager

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Operating Instruction for Thermal Imager
5-3.Power Off
• When Thermal Imagers power on, Push and hold the Power/Lock “ ” Button for two seconds, then popup
the power off menu, press “OK” to power off the device.
• Push and hold the Power/Lock “ ” Button for twelve seconds, the device will be forced power off directly.
5-4.Desktop
The Desktop is as follow:
1-Temperature Unit
2-Distance Unit
3-Emissivity
4-Zoom Indicator
5-SD Card
6-Wifi Status
7-Battery Capacity Status
8-Time
9-Main Menu
10-Centre Point Temperature Readings
11-Video Recording Indicator
12-AGC Mode Status
13-Max Temperature of Current Scene
14-Centre Point Cross
15-Value Adjustment for High Alarm
16-Value Adjustment for Low Alarm
17-AGC Mode Select Button
18-Min Temperature of Current Scene
19-Color Bar
12 3 78
9
4 5 610
14 17
18
19
11 12 13
15 16

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Operating Instruction for Thermal Imager
5-5.Focus
• To adjust focus, clockwise or Anti-clockwise rotates the IR Lens.
• When target comes into focus, it shows a sharper image.
• When the target moves out of focus, the thermal image becomes blurry.
Note: Correct focus is important in all imaging applications. Correct focus makes sure that the infrared energy is
correctly directed onto the pixels of the detector. Without the correct focus, the thermal image can be blurry and
the radiometric data will be inaccurate. Out-of-focus infrared images are frequently unusable or of little value.
5-6.Shutter
• The thermal image of the Thermal Imager becomes blurry, when the Thermal Imager no correcting after some
minutes or the Thermal Imager changes target.
• To get fine thermal image, the Thermal Imager need to correct.
• The Thermal Imager has two mode for correcting, Manual and Auto mode.
• In Manual Mode, long press the down arrow button, the Thermal Imager will correct.
• In Auto Mode, the Thermal Imager can correct automatically while The thermal image of the Thermal Imager
becomes blurry.
5-7.Temperature Measurement
• All objects radiate infrared energy.
• The quantity of energy radiated is base on the actual surface temperature and the surface emissivity of the object.
• The Thermal Imager senses the infrared energy from the surface of the object and uses this data to calculate an
estimated temperature value.
• Many common objects and materials such as painted metal, wood, water, skin, and cloth are very good at radiating
energy and it is easy to get relatively accurate measurements.
• For surfaces that are good at radiating energy (high emissivity), the emissivity factor is >0.90.
• This simplification does not work on shiny surfaces or unpainted metals as they have an emissivity of <0.6, These
materials are not good at radiating energy and are classified as low emissivity.
• To more accurately measure materials with a low emissivity, an emissivity correction is necessary.
• Adjustment to the emissivity setting will usually allow the Thermal Imager to calculate a more accurate estimate
of the actual temperature.
• More information please see Emissivity Adjustment to get the most accurate temperature measurements.
Focus to get
clear image

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Operating Instruction for Thermal Imager
5-8.Emissivity Adjustment
• The correct emissivity value is important to make the most accurate temperature measurement.
• Emissivity of a surface can have a large effect on the apparent temperatures that the Thermal Imager observes.
• Understanding the emissivity of the surface, but may not always, allow you to obtain more accurate temperature
measurements.
Note: Surfaces with an emissivity of <0.60 make reliable and consistent determination of actual temperature
problematic. The lower the emissivity, the more potential error is associated with the Imager’s temperature
measurement calculations. This is also true even when adjustments to the emissivity and reflected background
adjustments are performed properly.
• Emissivity is set directly as a value or from a list of emissivity values for some common materials.
• The global emissivity displays in LCD Screen as E=x.xx.
• The following table gives typical emissivity of important materials.
Material
Water
Stainless Steel
Aluminum Plate
Asphalt
Concrete
Cast Iron
Rubber
Wood
Brick
Tape
Brass Plate
Human Skin
PVC Plastic
Polycarbonate
Oxidized Copper
Rust
Paint
Soil
Emissivity
0.96
0.14
0.09
0.96
0.97
0.81
0.95
0.85
0.75
0.96
0.06
0.98
0.93
0.80
0.78
0.80
0.90
0.93

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Operating Instruction for Thermal Imager
5-9.Reflected Temperature
• Using the offset factor, the reflection is calculated out due to the low emissivity and the accuracy of the
temperature measurement with infrared instruments is improved.
• In most cases, the reflected temperature is identical to the ambient air temperature.
• Only when objects with strong emissions with much higher temperature are in the proximity of the object being
measured should be determined and used.
• The reflected temperature has only little effect on objects with high emissivity.
• The reflected temperature can be set individually.
• Follow these steps to get the right value for the reflected temperature.
1.Set the emissivity to 1.0.
2.Adjust the optical lens to near focus.
3.Looking in the opposite direction away from the object, take a measurement and freeze the image.
4.Determine the average value of the image and use that value for your input of reflected temperature.
5-10.Thermal Imager Reporter Software
• Thermal Imager Reporter software is supplied with the Thermal Imager.
• This Software is intended for Thermal Imager and contains feature to analyze images, organize data and
information, and make professional reports.
• Thermal Imager Reporter software allows audio annotations and commentary to be reviewed on a PC.

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Operating Instruction for Thermal Imager
6.Menus
The menus, together with buttons, are access for image, measurement, Emiss, Palette, temperature measurement
range, take photo and video, review, and settings.
6-1.Main Menu
• Press “Menu/OK” Button or touch the screen, the main menu will be poped up.
• Main Menu is the main interface of the Thermal Imager’s menus.
• It contains five items such as Measure parameters, Measure tools, Image mode, Palette, system Settings.
Paramters: Parameters set for the calculation temperature.
Measure Tools: Set for the calculation and display of radiometric temperature measurement data related to
the thermal images.
Image Mode: Set image source for the display on the Thermal Imager’s LCD. It contains five items such as
infrared image, visual image and fusion.
Palette: Set the type of color bar.
Settings: Set for the user preferences such as language, unit of temperature measurement, date, time;
restore factory setting and display product information.
6-2.Image Mode
1.In main menu, press “Image Mode” icon button, highlight “Image Mode”.
2.Press “Up” button, popup Image submenu which contains five image modes.
3.Press “Left” or “Right” button, or touch the image mode icons, highlight the Image mode which you want to
choose.
4.The image mode will change after you choose it.

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Operating Instruction for Thermal Imager
Thermal Imager has 5 kinds of image modes for display: Thermal, Picture in Picture, Camera, Auto Fusion, Measuring
Distance.
Thermal: Sisplays only infrared image.
Visible: Displays only visible image.
Picture in Picture: Display fusion image of infrared and
visible images.
AUF: Auto Fusion mode, compare the centre area temperature
with full screen, the machine will calculate the mix ratio of
infrared and visible images automaticly.
AUF

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Operating Instruction for Thermal Imager
Zoom Mode: In this mode, the image can be zoom in/out continuously.
In the Zoom mode, Press Left key or slide the zoom bar to zoom in the image; Press right Key or slide the zoom
bar zoom out the image.

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Operating Instruction for Thermal Imager
6-3.Image Palette
• The Image Palette lets you change the false-color presentation of the infrared images on display or captured.
• A variety of palettes are available for specific applications.
• The standard palettes offer an equal, linear presentation of colors that allow for best presentation of detail.
Standard Palette
1.In main menu, press “Palette” icon button, highlight “Palette”.
2.Press “Up” Button, popup Image submenu which contains 8 kinds of color palettes and 4 kinds of special
palettes.
3.Press “Left” or “Right” Button or touch the image mode icons, highlight the palette which you want to choose.
4.The palette mode will be changed after you choose it.
High Alarm: The temperature higher than the high alarm
set value will be colored to red.
Low Alarm: The temperature lower than the low alarm set
value will be colored to blue.
Iron Rainbow Grey Grey invert Brown hot Blue red Hot cold Feather

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Operating Instruction for Thermal Imager
Zone Alarm: The temperature between the high alarm and the low alarm set value will be colored to orange.
Visible Zone: The temperature between the high alarm and the low alarm set value will be colored to the
palette, other part of the image will displayed as visible image.
6-4.Image Adjustment
There are three kinds of mode for image adjustment, hisgram, Auto and Manual.
6-4-1.Lock Operation
• Press Power/Lock “ ” Button button to quickly to lock the current scene temperature range, “ ”means
Manual.
• After locked the current scene temperature range, press the adjust button ” ”, you can adjust the high/low
temperature level to see what temperature your interested range image.

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Operating Instruction for Thermal Imager
• Lock the low level and adjust the high level of the temperature range:
• Lock the high level and adjust the low level of the temperature range:
6-4-2.Histgram Mode and Auto Mode
• Auto Mode: level and span are decided by the thermal image of minimum temperature and maximum temperature,
The relationship between temperature and color is linear.
• Histgram Mode: the thermal image is enhanced by histogram algorithm, The relationship between temperature
and color is not linear, Some part of the image is enhanced.
• Touch the icon “HG” or “AUTO” below the colorbar to change the mode.