FLIR E5, E4 Operating Manual

User’s manual
FLIR Ex series
User’s manual
FLIR Ex series
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Table of contents
1 Disclaimers ............ .. ..................................... .. ................................. 1
1.1 Legal disclaimer ....................................................................... 1
1.2 Usage statistics ........................................................................1
1.3 Changes to registry ...................................................................1
1.4 U.S. Government Regulations...................................................... 1
1.5 Copyright ................................................................................1
1.6 Quality assurance .....................................................................1
1.7 Patents...................................................................................1
1.8 EULA Terms ............................................................................1
1.9 EULA Terms ............................................................................1
2 Safety information .......... .. ..................................... .. ..........................2
3 Notice to user ......... .. ..................................... .. ................................. 5
3.1 User-to-user forums .................................................................. 5
3.2 Calibration...............................................................................5
3.3 Accuracy ................................................................................ 5
3.4 Disposal of electronic waste........................................................ 5
3.5 Training .................................................................................. 5
3.6 Documentation updates ............................................................. 5
3.7 Important note about this manual.................................................. 5
4 Customer help .............. .. .. .. ............................... .. .. .. ......................... 6
4.1 General ..................................................................................6
4.2 Submitting a question ................................................................6
4.3 Downloads ..............................................................................6
5 Quick Start Guide ................. ..................................... .. ......................7
5.1 Procedure ...............................................................................7
6 Description............ ....................................... ....................................8
6.1 Camera parts ........................................................................... 8
6.2 Keypad................................................................................... 8
6.3 Connectors .............................................................................9
6.4 Screen elements .................................................................... 10
6.4.1 Figure........................................................................ 10
6.4.2 Explanation................................................................. 10
7 Operation ........ .. ..................................... .. ..................................... . 11
7.1 Charging the battery................................................................ 11
7.1.1 Charging the battery using the FLIR power supply ............... 11
7.1.2 Charging the battery using the FLIR stand-alone battery
7.1.3 Charging the battery using a USB cable ............................ 11
7.2 Saving an image ..................................................................... 11
7.2.1 General...................................................................... 11
7.2.2 Image capacity ............................................................ 11
7.2.3 Naming convention....................................................... 11
7.2.4 Procedure .................................................................. 12
7.3 Recalling an image.................................................................. 12
7.3.1 General...................................................................... 12
7.3.2 Procedure .................................................................. 12
7.4 Deleting an image................................................................... 12
7.4.1 General...................................................................... 12
charger.......................................................................11
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7.4.2 Procedure .................................................................. 12
7.5 Deleting all images.................................................................. 12
7.5.1 General...................................................................... 12
7.5.2 Procedure .................................................................. 12
7.6 Measuring a temperature using a spotmeter ................................. 13
7.6.1 General...................................................................... 13
7.6.2 Procedure .................................................................. 13
7.7 Measuring the hottest temperature within an area .......................... 13
7.7.1 General...................................................................... 13
7.7.2 Procedure .................................................................. 13
7.8 Measuring the coldest temperature within an area.......................... 13
7.8.1 General...................................................................... 13
7.8.2 Procedure .................................................................. 13
7.9 Hiding measurement tools ........................................................ 13
7.9.1 Procedure .................................................................. 13
7.10 Changing the color palette ........................................................ 14
7.10.1 General...................................................................... 14
7.10.2 Procedure .................................................................. 14
7.11 Changing image mode............................................................. 14
7.11.1 General...................................................................... 14
7.11.2 Procedure .................................................................. 15
7.12 Changing the temperature scale mode ........................................ 15
7.12.1 General...................................................................... 15
7.12.2 When to use Lock mode ................................................ 15
7.12.3 Procedure .................................................................. 15
7.13 Setting the emissivity as a surface property .................................. 16
7.13.1 General...................................................................... 16
7.13.2 Procedure .................................................................. 16
7.14 Setting the emissivity as a custom material................................... 16
7.14.1 General...................................................................... 16
7.14.2 Procedure .................................................................. 16
7.15 Changing the emissivity as a custom value ................................... 16
7.15.1 General...................................................................... 16
7.15.2 Procedure .................................................................. 17
7.16 Changing the reflected apparent temperature ............................... 17
7.16.1 General...................................................................... 17
7.16.2 Procedure .................................................................. 17
7.17 Changing the settings .............................................................. 17
7.17.1 General...................................................................... 17
7.17.2 Procedure .................................................................. 18
7.18 Updating the camera ............................................................... 18
7.18.1 General...................................................................... 18
7.18.2 Procedure .................................................................. 18
8 Technical data ......... .. ..................................... .. ............................... 19
9 Declaration of conformity ......................... .. ..................................... . 20
10 Cleaning the camera.......... .. ..................................... ....................... 21
10.1 Camera housing, cables, and other items..................................... 21
10.1.1 Liquids....................................................................... 21
10.1.2 Equipment.................................................................. 21
10.1.3 Procedure .................................................................. 21
10.2 Infrared lens .......................................................................... 21
10.2.1 Liquids....................................................................... 21
10.2.2 Equipment.................................................................. 21
10.2.3 Procedure .................................................................. 21
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Table of contents
11 Application examples..................................... .................................. 22
11.1 Moisture & water damage ......................................................... 22
11.1.1 General...................................................................... 22
11.1.2 Figure........................................................................ 22
11.2 Faulty contact in socket ............................................................ 22
11.2.1 General...................................................................... 22
11.2.2 Figure........................................................................ 22
11.3 Oxidized socket...................................................................... 23
11.3.1 General...................................................................... 23
11.3.2 Figure........................................................................ 23
11.4 Insulation deficiencies.............................................................. 24
11.4.1 General...................................................................... 24
11.4.2 Figure........................................................................ 24
11.5 Draft .................................................................................... 25
11.5.1 General...................................................................... 25
11.5.2 Figure........................................................................ 25
12 About FLIR Systems .................. .. ..................................... .. ............. 26
12.1 More than just an infrared camera .............................................. 27
12.2 Sharing our knowledge ............................................................ 27
12.3 Supporting our customers......................................................... 27
12.4 A few images from our facilities .................................................. 28
13 Glossary .... ..................................... .. ..................................... .. ...... 29
14 Thermographic measurement techniques .............................. .. .......... 32
14.1 Introduction .......................................................................... 32
14.2 Emissivity.............................................................................. 32
14.2.1 Finding the emissivity of a sample.................................... 32
14.3 Reflected apparent temperature ................................................. 35
14.4 Distance ............................................................................... 35
14.5 Relative humidity .................................................................... 35
14.6 Other parameters.................................................................... 35
15 History of infrared technology................................. .. .. .. .................... 37
16 Theory of thermography.. .. ..................................... .. ........................ 40
16.1 Introduction ........................................................................... 40
16.2 The electromagnetic spectrum................................................... 40
16.3 Blackbody radiation................................................................. 40
16.3.1 Planck’s law ................................................................ 41
16.3.2 Wien’s displacement law................................................ 42
16.3.3 Stefan-Boltzmann's law ................................................. 43
16.3.4 Non-blackbody emitters................................................. 44
16.4 Infrared semi-transparent materials............................................. 46
17 The measurement formula....................... ..................................... .. .. 47
18 Emissivity tables ..................................... .. ..................................... . 51
18.1 References............................................................................ 51
18.2 Tables .................................................................................. 51
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1

Disclaimers

1.1 Legal disclaimer

All products manufactured by FLIR Systems are warranted against defective materials and workmanship for a period of one (1) year from the delivery date of the original purchase, provided such products have been under normal storage, use and service, and in accordance with FLIR Systems instruction.
Uncooled handheld infrared cameras manufactured by FLIR Systems are warranted against defective materials and workmanship for a period of two (2) years from the delivery date of theoriginal purchase, provided such prod­ucts have been under normal storage, use and service, and in accordance with FLIR Systems instruction, and provided that the camera has been regis­tered within 60 days of original purchase.
Detectors for uncooled handheld infrared cameras manufactured by FLIR Systems are warranted against defective materials and workmanship for a period of ten (10) years from the delivery date of the original purchase, pro­vided such products have been under normal storage, use and service, and in accordance with FLIR Systems instruction, and provided that the camera has been registered within 60 days of original purchase.
Products which are not manufactured by FLIR Systems but included in sys­tems delivered by FLIR Systems to the original purchaser, carry the warranty, if any, of the particular supplier only. FLIR Systems has no responsibility whatsoever for such products.
The warranty extends only to the original purchaser and is not transferable. It is not applicable to any product which has been subjected to misuse, neglect, accident or abnormal conditions of operation. Expendable partsare excluded from the warranty.
In the case of a defect in a product covered by this warranty the product must not be further used in order to prevent additional damage. The purchaser shall promptly report any defect to FLIR Systems or this warranty will not apply.
FLIR Systems will, at its option, repair or replace any such defective product free of charge if, upon inspection, it proves to be defective in material or work­manship and provided that it is returned to FLIR Systems within the said one­year period.
FLIR Systems has no other obligation or liability for defects than those set forth above.
No other warranty is expressed or implied. FLIR Systems specifically dis­claims the implied warranties of merchantability and fitness for a particular purpose.
FLIR Systems shall not be liable for any direct, indirect, special, incidental or consequential loss or damage, whether based on contract, tort or anyother legal theory.
This warranty shall be governed by Swedish law. Any dispute, controversy or claim arising out of or in connection with thiswar-
ranty, shall be finally settled by arbitration in accordance with the Rules of the Arbitration Institute of the Stockholm Chamber of Commerce. The place of ar­bitration shall be Stockholm. The language to be used in thearbitral proceed­ings shall be English.

1.2 Usage statistics

FLIR Systems reserves the right to gather anonymous usage statistics to help maintain and improve the quality of our software and services.

1.3 Changes to registry

The registry entry HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet \Control\Lsa\LmCompatibilityLevel will be automatically changed to level 2 if the FLIR Camera Monitor service detects a FLIR camera connected to the computer with a USB cable. The modification will only be executed if the camera device implements a remote network service that supports network logons.

1.4 U.S. Government Regulations

This product is subject to US Export Regulations. Please refer to exportques­tions@flir.com with any questions.

1.5 Copyright

© 2013, FLIR Systems, Inc. All rights reserved worldwide. No parts of the software including source code may be reproduced, transmitted, transcribed or translated into any language or computer language in any form or by any means, electronic, magnetic, optical, manual or otherwise, without the prior written permission of FLIR Systems.
The documentation must not, in whole or part, be copied, photocopied,re­produced, translated or transmitted to any electronic mediumor machine readable form without prior consent, in writing, from FLIR Systems.
Names and marks appearing on the products herein are either registered trademarks or trademarks of FLIR Systems and/or its subsidiaries. All other trademarks, trade names or company names referenced herein are used for identification only and are the property of their respective owners.

1.6 Quality assurance

The Quality Management System under which these products are developed and manufactured has been certified in accordance with the ISO 9001 standard.
FLIR Systems is committed to a policy of continuous development; therefore we reserve the right to make changes andimprovements on any of the prod­ucts without prior notice.

1.7 Patents

One or several of thefollowing patents and/or design patents may apply to the products and/or features. Additional pending patents and/or pending de­sign patents may also apply.
000279476-0001; 000439161; 000499579-0001; 000653423; 000726344; 000859020; 001106306-0001; 001707738; 001707746; 001707787; 001776519; 001954074; 002021543; 002058180-001; 1144833; 1182246; 1182620; 1285345; 1299699; 1325808; 1336775; 1391114; 1402918; 1404291; 1411581; 1415075; 1421497; 1458284; 1678485; 1732314; 2106017; 2381417; 3006596; 3006597; 466540; 483782; 484155; 4889913; 5177595; 60122153.2; 602004011681.5-08; 6707044; 68657; 7034300; 7110035; 7154093; 7157705; 7237946; 7312822; 7332716; 7336823; 7544944; 7667198; 7809258; 7826736; 8,018,649 B2; 8,153,971; 8212210 B2; 8289372; 8354639 B2; 8384783; D540838; D549758; D579475; D584755; D599,392; D615,113; D664,580; D664,581; D665,004; D665,440; DI6702302-9; DI6903617-9; DI7002221-6; DI7002891-5; DI7002892-3; DI7005799-0; DM/057692; DM/061609; EP 2115696 B1; EP2315433; SE 0700240-5; US 8340414 B2; ZL01823221.3; ZL01823226.4; ZL02331553.9; ZL02331554.7; ZL200480034894.0; ZL200530120994.2; ZL200610088759.5; ZL200630130114.4; ZL200730151141.4; ZL200730339504.7; ZL200820105768.8; ZL200830128581.2; ZL200880105236.4; ZL200880105769.2; ZL200930190061.9; ZL201030176127.1; ZL201030176130.3; ZL201030176157.2; ZL201030595931.3; ZL201130442354.9; ZL201230471744.3; ZL201230620731.8

1.8 EULA Terms

• Youhave acquired a device (“INFRARED CAMERA”) that includes soft­ware licensed by FLIR Systems AB from Microsoft Licensing, GP or its affiliates (“MS”). Those installed software products of MS origin, as well as associated media, printed materials, and “online” or electronic docu­mentation (“SOFTWARE”) are protected by international intellectual property laws and treaties. The SOFTWARE is licensed, not sold. All rights reserved.
• IF YOU DO NOT AGREE TO THIS END USER LICENSE AGREEMENT (“EULA”), DO NOT USE THE DEVICE OR COPY THE SOFTWARE. IN­STEAD, PROMPTLY CONTACT FLIR Systems AB FOR INSTRUC­TIONS ON RETURN OF THE UNUSED DEVICE(S) FOR A REFUND.
ANY USE OF THE SOFTWARE, INCLUDING BUT NOT LIMITED TO USE ON THE DEVICE, WILL CONSTITUTE YOUR AGREEMENT TO THIS EULA (OR RATIFICATION OF ANY PREVIOUS CONSENT).
GRANT OF SOFTWARE LICENSE. This EULAgrants you the following license:
• Youmay use the SOFTWARE only on the DEVICE.
NOT FAULT TOLERANT. THE SOFTWARE IS NOT FAULT TOL-
ERANT.FLIR SystemsAB HAS INDEPENDENTLYDETERMINED HOW TO USE THE SOFTWARE IN THE DEVICE, AND MS HAS RELIED UPON FLIR Systems AB TO CONDUCT SUFFICIENT TESTING TO DETERMINE THAT THE SOFTWARE IS SUITABLE FOR SUCH USE.
NO WARRANTIES FOR THE SOFTWARE. THE SOFTWARE is
provided “AS IS” and with all faults. THE ENTIRE RISK AS TO SATISFACTORY QUALITY, PERFORMANCE, ACCURACY, AND EFFORT (INCLUDING LACK OF NEGLIGENCE) IS WITH YOU. ALSO, THERE IS NO WARRANTYAGAINST INTERFERENCE WITH YOUR ENJOYMENT OF THE SOFTWARE OR AGAINST INFRINGEMENT.IF YOU HAVE RECEIVED ANY WARRANTIES
REGARDING THE DEVICE OR THE SOFTWARE, THOSE WAR­RANTIES DO NOT ORIGINATE FROM, AND ARE NOT BINDING ON, MS.
• No Liability for Certain Damages. EXCEPT AS PROHIBITED BY
LAW,MS SHALL HAVE NO LIABILITY FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL OR INCIDENTAL DAMAGES ARISING FROM OR IN CONNECTION WITH THE USE OR PER­FORMANCE OF THE SOFTWARE. THIS LIMITATION SHALL APPLYEVEN IF ANY REMEDY FAILS OF ITS ESSENTIAL PUR­POSE. IN NO EVENT SHALL MS BE LIABLE FOR ANY AMOUNT IN EXCESS OF U.S. TWO HUNDRED FIFTY DOL­LARS (U.S.$250.00).
Limitations on Reverse Engineering, Decompilation, and Dis-
assembly. You may not reverse engineer, decompile, or disas-
semble the SOFTWARE, except and only to the extent that such activity is expressly permitted by applicable law notwithstanding this limitation.
SOFTWARE TRANSFER ALLOWED BUT WITH RESTRIC-
TIONS. You may permanently transfer rights under this EULA only as part of a permanent sale or transfer of the Device, and only if the recipient agrees to this EULA. If the SOFTWARE is an up­grade, any transfer must also include all prior versions of the SOFTWARE.
EXPORT RESTRICTIONS. You acknowledge that SOFTWARE is
subject to U.S. export jurisdiction. You agree to comply with all ap­plicable international and national laws that apply tothe SOFT­WARE, including the U.S. Export AdministrationRegulations, as well as end-user, end-use and destination restrictions issued by U. S. and other governments. For additional information see http:// www.microsoft.com/exporting/.

1.9 EULA Terms

Qt4 Core and Qt4 GUI, Copyright ©2013 Nokia Corporation and FLIR Sys­tems AB. This Qt library is a free software; you can redistribute it and/or mod­ify it under the terms of the GNU Lesser General PublicLicense as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it willbe useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITYor FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License, http://www.gnu.org/licenses/lgpl-2.1. html. The source code for the libraries Qt4 Core and Qt4GUI may be re­quested from FLIR Systems AB.
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WARNING
Applicability: Cameras with one or more batteries.
Do not disassemble or do a modification to the battery. The battery contains safety and protection devi­ces which, if damage occurs, can cause the battery to become hot, or cause an explosion or an ignition.
WARNING
Applicability: Cameras with one or more batteries.
If there is a leak from the battery and you get the fluid in your eyes, do not rub your eyes. Flush well with water and immediately get medical care. The battery fluid can cause injury to your eyes if you do not do this.
WARNING
Applicability: Cameras with one or more batteries.
Do not continue to charge the battery if it does not become charged in the specified charging time. If you continue to charge the battery, it can become hot and cause an explosion or ignition. Injury to per­sons can occur.
WARNING
Applicability: Cameras with one or more batteries.
Only use the correct equipment to remove the electrical power from 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. Injury to persons can occur.
WARNING
Make sure that you read all applicable MSDS (Material Safety Data Sheets) and warning labels on con­tainers before you use a liquid. The liquids can be dangerous. Injury to persons can occur.
CAUTION
Do not point the infrared camera (with or without the lens cover) at strong energy sources, for example, devices that cause 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 camera.
CAUTION
Do not use the camera temperatures more than +50°C (+122°F), unless other information is specified in the user documentation or technical data. High temperatures can cause damage to the camera.
CAUTION
Applicability: Cameras with one or more batteries.
Do not attach the batteries directly to a car’s cigarette lighter socket, unless FLIR Systems supplies a specific adapter to connect the batteries to a cigarette lighter socket. Damage to the batteries can occur.
CAUTION
Applicability: Cameras with one or more batteries.
Do not connect the positive terminal and the negative terminal of the battery to each other with a metal object (such as wire). Damage to the batteries can occur.

Safety information

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CAUTION
Applicability: Cameras with one or more batteries.
Do not get water or salt water on the battery, or permit the battery to become wet. Damage to the bat­teries can occur.
CAUTION
Applicability: Cameras with one or more batteries.
Do not make holes in the battery with objects. Damage to the battery can occur.
CAUTION
Applicability: Cameras with one or more batteries.
Do not hit the battery with a hammer. Damage to the battery can occur.
CAUTION
Applicability: Cameras with one or more batteries.
Do not put your foot on the battery, hit it or cause shocks to it. Damage to the battery can occur.
CAUTION
Applicability: Cameras with one or more batteries. Applicability: Cameras with one or more batteries.
Do not put the batteries in or near a fire, or into direct sunlight. When the battery becomes hot, the built­in safety equipment becomes energized and can stop the battery charging procedure. If the battery be­comes hot, damage can occur to the safety equipment and this can cause more heat, damage or igni­tion of the battery.
CAUTION
Applicability: Cameras with one or more batteries.
Do not put the battery on a fire or increase the temperature of the battery with heat. Damage to the bat­tery and injury to persons can occur.
CAUTION
Applicability: Cameras with one or more batteries.
Do not put the battery on or near fires, stoves, or other high-temperature locations. Damage to the bat­tery and injury to persons can occur.
CAUTION
Applicability: Cameras with one or more batteries.
Do not solder directly onto the battery. Damage to the battery can occur.
CAUTION
Applicability: Cameras with one or more batteries.
Do not use the battery if, when you use, charge, or put the battery in storage, there is an unusual smell from the battery, the battery feels hot, changes color, changes shape, or is in an unusual condition. Speak with your sales office if one or more of these problems occurs. Damage to the battery and injury to persons can occur.
CAUTION
Applicability: Cameras with one or more batteries.
Only use a specified battery charger when you charge the battery. Damage to the battery can occur if you do not do this.
Safety information
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CAUTION
Applicability: Cameras with one or more batteries.
The temperature range through which you can charge the battery is ±0°C to +45°C (+32°F to +113°F), unless other information is specified in the user documentation or technical data. 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.
CAUTION
Applicability: Cameras with one or more batteries.
The temperature range through which you can remove the electrical power from the battery is -15°C to +50°C (+5°F to +122°F), unless other information is specified in the user documentation or technical data. If you operate the battery out of this temperature range, it can decrease the performance or the life cycle of the battery.
CAUTION
Applicability: Cameras with one or more batteries.
When the battery is worn, apply insulation to the terminals with adhesive tape or equivalent materials before you discard it. Damage to the battery and injury to persons can occur if you do not do this.
CAUTION
Applicability: Cameras with one or more batteries.
Remove any water or moisture on the battery before you install it. Damage to the battery can occur if you do not do this.
CAUTION
Do not apply solvents or equivalent liquids to the camera, the cables, or other items. Damage to the bat­tery and injury to persons can occur.
CAUTION
Be careful when you clean the infrared lens. The lens has an anti-reflective coating which is easily dam­aged. Damage to the infrared lens can occur.
CAUTION
Do not use too much force to clean the infrared lens. This can cause damage to the anti-reflective coating.
Note
The encapsulation rating is only applicable when all the openings on the camera are sealed with their correct covers, hatches, or caps. This includes the compartments for data storage, batteries, and connectors.
Safety information
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As with most electronic products, this equipment must be disposed of in an environmen­tally friendly way, and in accordance with existing regulations for electronic waste.
Please contact your FLIR Systems representative for more details.

3.5 Training

To read about infrared training, visit:
• http://www.infraredtraining.com
• http://www.irtraining.com
• http://www.irtraining.eu

3.6 Documentation updates

Our manuals are updated several times per year, and we also issue product-critical notifi­cations of changes on a regular basis.
To access the latest manuals and notifications, go to the Download tab at: http://support.flir.com It only takes a few minutes to register online. In the download area you will also find the
latest releases of manuals for our other products, as well as manuals for our historical and obsolete products.

3.7 Important note about this manual

FLIR Systems issues generic manuals that cover several cameras within a model line. This means that this manual may contain descriptions and explanations that do not apply
to your particular camera model.

Notice to user

3.1 User-to-user forums

Exchange ideas, problems, and infrared solutions with fellow thermographers around the world in our user-to-user forums. To go to the forums, visit:
http://www.infraredtraining.com/community/boards/

3.2 Calibration

We recommend that you send in the camera for calibration once a year. Contact your lo­cal sales office for instructions on where to send the camera.

3.3 Accuracy

For very accurate results, we recommend that you wait 5 minutes after you have started the camera before measuring a temperature.

3.4 Disposal of electronic waste

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4.1 General

For customer help, visit: http://support.flir.com

4.2 Submitting a question

To submit a question to the customer help team, you must be a registered user. It only takes a few minutes to register online. If you only want to search the knowledgebase for existing questions and answers, you do not need to be a registered user.
When you want to submit a question, make sure that you have the following information to hand:
• The camera model
• The camera serial number
• The communication protocol, or method, between the camera and your device (for ex­ample, HDMI, Ethernet, USB, or FireWire)
• Device type (PC/Mac/iPhone/iPad/Android device, etc.)
• Version of any programs from FLIR Systems
• Full name, publication number, and revision number of the manual

4.3 Downloads

On the customer help site you can also download the following:
• Firmware updates for your infrared camera.
• Program updates for your PC/Mac software.
• Freeware and evaluation versions of PC/Mac software.
• User documentation for current, obsolete, and historical products.
• Mechanical drawings (in *.dxf and *.pdf format).
• Cad data models (in *.stp format).
• Application stories.
• Technical datasheets.
• Product catalogs.

Customer help

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to turn on the camera.
3. Open the lens cap by pushing the lens cap lever.
4. Aim the camera toward your target of interest.
5. Pull the trigger to save an image.
(Optional steps)
6. Install FLIR Tools on your computer.
7. Start FLIR Tools.
8. Connect the camera to your computer, using the USB cable.
9. Import the images into FLIR Tools.
10. Create a PDF report in FLIR Tools.

Quick Start Guide

5.1 Procedure

Follow this procedure:
1. Charge the battery. You can do this in three different ways:
• Charge the battery using the FLIR stand-alone battery charger.
• Charge the battery using the FLIR power supply.
• Charge the battery using a USB cable connected to a computer.
Note
Charging the camera using a USB cable connected to a computer takes considerably longer than using the FLIR power supply or the FLIR stand-alone battery charger.
2. Push the On/off button
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6.1.2 Explanation

1. Digital camera lens.
2. Infrared lens.
3. Lever to open and close the lens cap.
4. Trigger to save images.
5. Battery.

6.2 Keypad

6.2.1 Figure

6.2.2 Explanation

1. Camera screen.

Description

6.1 Camera parts

6.1.1 Figure

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Description6
.
Function:
• Push to open the image archive.
3. Navigation pad.
Function:
• Push left/right or up/down to navigate in menus, submenus, and dialog boxes.
• Push the center to confirm.
4. Cancel button
.
Function:
• Push to cancel a choice.
• Push to go back into the menu system.
5. On/off button
Function:
• Push to turn on the camera.
• Push and hold for more than 1 second to turn off the camera.

6.3 Connectors

6.3.1 Figure

6.3.2 Explanation

The purpose of this USB mini-B connector is the following:
• Charging the battery using the FLIR power supply.
• Charging the battery using a USB cable connected to a computer.
2. Archive button
Note
Charging the camera using a USB cable connected to a computer takes considerably longer than using the FLIR power supply or the FLIR stand-alone battery charger.
• Moving images from the camera to a computer for further analysis in FLIR Tools.
Note
Install FLIR Tools on your computer before you move the images.
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Description6

6.4.2 Explanation

1. Main menu toolbar.
2. Submenu toolbar.
3. Spotmeter.
4. Result table.
5. Status icons.
6. Temperature scale.

6.4 Screen elements

6.4.1 Figure

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3. Put the battery into the stand-alone battery charger.

Operation

7.1 Charging the battery

7.1.1 Charging the battery using the FLIR power supply

Follow this procedure:
1. Connect the power supply to a wall outlet.
2. Connect the power supply cable to the USB connector on the camera.
Note
The charging time for a fully depleted battery is 2 hours.

7.1.2 Charging the battery using the FLIR stand-alone battery charger.

Follow this procedure:
1. Connect the stand-alone battery charger to a wall outlet.
2. Remove the battery from the camera.
Note
• The charging time for a fully depleted battery is 2 hours.
• The battery is being charged when the blue LED is flashing.
• The battery is fully charged when the blue LED is continuous.

7.1.3 Charging the battery using a USB cable

Follow this procedure:
1. Connect the camera to a computer using a USB cable.
Note
• To charge the camera, the computer must be turned on.
• Charging the camera using a USB cable connected to a computer takes considerably longer than using the FLIR power supply or the FLIR stand-alone battery charger.

7.2 Saving an image

7.2.1 General

You can save multiple images to the internal camera memory.

7.2.2 Image capacity

Approximately 500 images can be saved to the internal camera memory.

7.2.3 Naming convention

The naming convention for images is FLIRxxxx.jpg, where xxxx is a unique counter.
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7.3 Recalling an image

7.3.1 General

When you save an image, it is stored in the internal camera memory. To display the im­age again, you can recall it from the internal camera memory.

7.3.2 Procedure

Follow this procedure:
1. Push the Archive button
.
2. Push the navigation pad left/right or up/down to select the image you want to view.
3. Push the center of the navigation pad. This displays the selected image.
4. To return to live mode, push the Cancel button
repeatedly or push the Archive
button
.

7.4 Deleting an image

7.4.1 General

You can delete one or more images from the internal camera memory.

7.4.2 Procedure

Follow this procedure:
1. Push the Archive button
.
2. Push the navigation pad left/right or up/down to select the image you want to view.
3. Push the center of the navigation pad. This displays the selected image.
4. Push the center of the navigation pad. This displays a toolbar.
5. On the toolbar, select Delete
.

7.5 Deleting all images

7.5.1 General

You can delete all images from the internal camera memory.

7.5.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
Operation

7.2.4 Procedure

Follow this procedure:
1. To save an image, pull the trigger.
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. This displays a dialog box.
3. In the dialog box, select Device settings. This displays a dialog box.
4. In the dialog box, select Reset options. This displays a dialog box.
5. In the dialog box, select Delete all saved images.

7.6 Measuring a temperature using a spotmeter

7.6.1 General

You can measure a temperature using a spotmeter. This will display the temperature at the position of the spotmeter on the screen.

7.6.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Measurement
. This displays a toolbar.
3. On the toolbar, select Center spot
. The temperature at the position of the spotmeter will now be displayed in the top left corner of the screen.

7.7 Measuring the hottest temperature within an area

7.7.1 General

You can measure the hottest temperature within an area. This displays a moving spot­meter that indicates the hottest temperature.

7.7.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Measurement
. This displays a toolbar.
3. On the toolbar, select Auto hot spot
.

7.8 Measuring the coldest temperature within an area

7.8.1 General

You can measure the coldest temperature within an area. This displays a moving spot­meter that indicates the coldest temperature.

7.8.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Measurement
. This displays a toolbar.
3. On the toolbar, select Auto cold spot
.

7.9 Hiding measurement tools

7.9.1 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Measurement
. This displays a toolbar.
3. On the toolbar, select No measurements
.
Operation
2. On the toolbar, select Settings
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. This displays a toolbar.
3. On the toolbar, select a new color palette.

7.11 Changing image mode

7.11.1 General

The camera can operate in five different image modes:
MSX (Multi Spectral Dynamic Imaging): The camera displays an infrared image where the edges of the objects are enhanced.
Thermal: The camera displays a fully thermal image.
Picture-in-picture (large): The camera displays a digital camera image with a large superimposed infrared image frame.
Picture-in-picture (small): The camera displays a digital camera image with a small superimposed infrared image frame.
Operation

7.10 Changing the color palette

7.10.1 General

You can change the color palette that the camera uses to display different temperatures. A different palette can make it easier to analyze an image.

7.10.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Color
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Digital camera: The camera displays a digital camera image.

7.11.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Image mode
. This displays a toolbar.
3. On the toolbar, select one of the following:
MSX
.
Thermal
.
Picture-in-picture (large)
.
Picture-in-picture (small)
.
Digital camera
.

7.12 Changing the temperature scale mode

7.12.1 General

The camera can operate in two different temperature scale modes:
Auto mode: In this mode, the camera is continuously auto-adjusted for the best image brightness and contrast.
Lock mode: In this mode, the camera locks the temperature span and the temperature level.

7.12.2 When to use Lock mode

A typical situation where you would want to use Lock mode is when looking for tempera­ture anomalies in two items with a similar design or construction.
For example, if you are looking at two cables, where you suspect one is overheated, working in Lock mode will clearly show that one is overheated. The higher temperature in that cable would create a lighter color for the higher temperature.
If you use Auto mode instead, the color for the two items will appear the same.

7.12.3 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
Operation
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. This displays a toolbar.
3. On the toolbar, select one of the following:
Auto
.
Lock
.

7.13 Setting the emissivity as a surface property

7.13.1 General

To measure temperatures accurately, the camera must know what kind of surface you are measuring. You can choose between the following surface properties:
Matt.
Semi-matt.
Semi-glossy.
For more information about emissivity, see section 14 Thermographic measurement techniques, page 32.

7.13.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Settings
. This displays a dialog box.
3. In the dialog box, select Measurement parameters. This displays a dialog box.
4. In the dialog box, select Emissivity. This displays a dialog box.
5. In the dialog box, select one of the following:
Matt.
Semi-matt.
Semi-glossy.

7.14 Setting the emissivity as a custom material

7.14.1 General

Instead of specifying a surface property as matt, semi-matt or semi-glossy, you can spec­ify a custom material from a list of materials.
For more information about emissivity, see section 14 Thermographic measurement techniques, page 32.

7.14.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Settings
. This displays a dialog box.
3. In the dialog box, select Measurement parameters. This displays a dialog box.
4. In the dialog box, select Emissivity. This displays a dialog box.
5. In the dialog box, select Custom material. This displays a list of materials with known
emissivities.
6. In the list, select the material.

7.15 Changing the emissivity as a custom value

7.15.1 General

For very precise measurements, you may need to set the emissivity, instead of selecting a surface property or a custom material. You also need to understand how emissivity and reflectivity affect measurements, rather than just simply selecting a surface property.
Operation
2. On the toolbar, select Temperature scale
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. This displays a dialog box.
3. In the dialog box, select Measurement parameters. This displays a dialog box.
4. In the dialog box, select Emissivity. This displays a dialog box.
5. In the dialog box, select Custom value. This displays a dialog box where you can set
a custom value.

7.16 Changing the reflected apparent temperature

7.16.1 General

This parameter is used to compensate for the radiation reflected by the object. If the emissivity is low and the object temperature significantly different from that of the re­flected temperature, it will be important to set and compensate for the reflected apparent temperature correctly.
For more information about reflected apparent temperature, see section 14 Thermo- graphic measurement techniques, page 32.

7.16.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Settings
. This displays a dialog box.
3. In the dialog box, select Measurement parameters. This displays a dialog box.
4. In the dialog box, select Reflected apparent temperature. This displays a dialog box
where you can set a value.

7.17 Changing the settings

7.17.1 General

You can change a variety of settings for the camera. These include the following:
Region & time:
Language.
Temperature unit.
Date & time.
Date & time format.
Reset options:
Reset default camera mode.
Reset device settings to factory default.
Delete all saved images.
Power:
Auto power off.
Display intensity.
Operation
Emissivity is a property that indicates how much radiation originates from an object as opposed to being reflected by it. A lower value indicates that a larger proportion is being reflected, while a high value indicates that a lower proportion is being reflected.
Polished stainless steel, for example, has an emissivity of 0.14, while a structured PVC floor typically has an emissivity of 0.93.
For more information about emissivity, see section 14 Thermographic measurement techniques, page 32.

7.15.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Settings
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. This displays a dialog box.
3. In the dialog box, select Device settings. This displays a dialog box.
4. In the dialog box, select the setting that you want to change and use the navigation
pad to display additional dialog boxes.

7.18 Updating the camera

7.18.1 General

To take advantage of our latest camera firmware, it is important that you keep your cam­era updated. You update your camera using FLIR Tools.

7.18.2 Procedure

Follow this procedure:
1. Start FLIR Tools.
2. Start the camera.
3. Connect the camera to the computer using the USB cable.
4. On the Help menu in FLIR Tools, click Check for updates.
5. Follow the on-screen instructions.
Operation
Photo as separate JPEG: When this menu command is selected, the digital photo from the visual camera is saved at its full field of view as a separate JPEG image.
Camera information: This menu command displays various items of information about the camera, such as the model, serial number, software version, latest calibration date, etc.

7.17.2 Procedure

Follow this procedure:
1. Push the center of the navigation pad. This displays a toolbar.
2. On the toolbar, select Settings
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Technical data

For technical data on this product, refer to the product catalog and/or technical data­sheets on the User Documentation CD-ROM that comes with the product.
The product catalog and the datasheets are also available at http://support.flir.com.
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Declaration of conformity

10
CAUTION
Do not apply solvents or similar liquids to the camera, the cables, or other items. This can cause damage.
WARNING
Make sure that you read all applicable MSDS (Material Safety Data Sheets) and warning labels on con­tainers before you use a liquid: the liquids can be dangerous.
CAUTION
• Be careful when you clean the infrared lens. The lens has a delicate anti-reflective coating.
• Do not clean the infrared lens too vigorously. This can damage the anti-reflective coating.

Cleaning the camera

10.1 Camera housing, cables, and other items

10.1.1 Liquids

Use one of these liquids:
• Warm water
• A weak detergent solution

10.1.2 Equipment

A soft cloth

10.1.3 Procedure

Follow this procedure:
1. Soak the cloth in the liquid.
2. Twist the cloth to remove excess liquid.
3. Clean the part with the cloth.

10.2 Infrared lens

10.2.1 Liquids

Use one of these liquids:
• A commercial lens cleaning liquid with more than 30% isopropyl alcohol.
• 96% ethyl alcohol (C
• DEE (= ‘ether’ = diethylether, C
• 50% acetone (= dimethylketone, (CH liquid prevents drying marks on the lens.

10.2.2 Equipment

Cotton wool

10.2.3 Procedure

Follow this procedure:
1. Soak the cotton wool in the liquid.
2. Twist the cotton wool to remove excess liquid.
3. Clean the lens one time only and discard the cotton wool.
2H5
OH).
4H10
O).
CO)) + 50% ethyl alcohol (by volume). This
3)2
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11.2 Faulty contact in socket

11.2.1 General

Depending on the type of connection a socket has, an improperly connected wire can re­sult in local temperature increase. This temperature increase is caused by the reduced contact area between the connection point of the incoming wire and the socket , and can result in an electrical fire.

Application examples

11.1 Moisture & water damage

11.1.1 General

It is often possible to detect moisture and water damage in a house by using an infrared camera. This is partly because the damaged area has a different heat conduction prop­erty and partly because it has a different thermal capacity to store heat than the sur­rounding material.
Note
Many factors can come into play as to how moisture or water damage will appear in an infrared image. For example, heating and cooling of these parts takes place at different rates depending on the material
and the time of day. For this reason, it is important that other methods are used as well to check for moisture or water damage.

11.1.2 Figure

The image below shows extensive water damage on an external wall where the water has penetrated the outer facing because of an incorrectly installed window ledge.
Note
A socket’s construction may differ dramatically from one manufacturer to another. For this reason, dif­ferent faults in a socket can lead to the same typical appearance in an infrared image.
Local temperature increase can also result from improper contact between wire and socket, or from dif­ference in load.

11.2.2 Figure

The image below shows a connection of a cable to a socket where improper contact in the connection has resulted in local temperature increase.
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Application examples11

11.3 Oxidized socket

11.3.1 General

Depending on the type of socket and the environment in which the socket is installed, ox­ides may occur on the socket's contact surfaces. These oxides can lead to locally in­creased resistance when the socket is loaded, which can be seen in an infrared image as local temperature increase.
Note
A socket’s construction may differ dramatically from one manufacturer to another. For this reason, dif­ferent faults in a socket can lead to the same typical appearance in an infrared image.
Local temperature increase can also result from improper contact between a wire and socket, or from difference in load.

11.3.2 Figure

The image below shows a series of fuses where one fuse has a raised temperature on the contact surfaces against the fuse holder. Because of the fuse holder’s blank metal, the temperature increase is not visible there, while it is visible on the fuse’s ceramic material.
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Application examples11

11.4 Insulation deficiencies

11.4.1 General

Insulation deficiencies may result from insulation losing volume over the course of time and thereby not entirely filling the cavity in a frame wall.
An infrared camera allows you to see these insulation deficiencies because they either have a different heat conduction property than sections with correctly installed insulation, and/or show the area where air is penetrating the frame of the building.
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Note
When you are inspecting a building, the temperature difference between the inside and outside should be at least 10°C (18°F). Studs, water pipes, concrete columns, and similar components may resemble an insulation deficiency in an infrared image. Minor differences may also occur naturally.

11.4.2 Figure

In the image below, insulation in the roof framing is lacking. Due to the absence of insula­tion, air has forced its way into the roof structure, which thus takes on a different charac­teristic appearance in the infrared image.
Application examples11
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11.5 Draft

11.5.1 General

Draft can be found under baseboards, around door and window casings, and above ceil­ing trim. This type of draft is often possible to see with an infrared camera, as a cooler airstream cools down the surrounding surface.
Note
When you are investigating draft in a house, there should be sub-atmospheric pressure in the house. Close all doors, windows, and ventilation ducts, and allow the kitchen fan to run for a while before you take the infrared images.
An infrared image of draft often shows a typical stream pattern. You can see this stream pattern clearly in the picture below.
Also keep in mind that drafts can be concealed by heat from floor heating circuits.

11.5.2 Figure

The image below shows a ceiling hatch where faulty installation has resulted in a strong draft.
12
Figure 12.1 Patent documents from the early 1960s

About FLIR Systems

FLIR Systems was established in 1978 to pioneer the development of high-performance infrared imaging systems, and is the world leader in the design, manufacture, and mar­keting of thermal imaging systems for a wide variety of commercial, industrial, and gov­ernment applications. Today, FLIR Systems embraces five major companies with outstanding achievements in infrared technology since 1958—the Swedish AGEMA In­frared Systems (formerly AGA Infrared Systems), the three United States companies In­digo Systems, FSI, and Inframetrics, and the French company Cedip. In November 2007, Extech Instruments was acquired by FLIR Systems.
The company has sold more than 258,000 infrared cameras worldwide for applications such as predictive maintenance, R & D, non-destructive testing, process control and au­tomation, and machine vision, among many others.
FLIR Systems has three manufacturing plants in the United States (Portland, OR, Bos­ton, MA, Santa Barbara, CA) and one in Sweden (Stockholm). Since 2007 there is also a manufacturing plant in Tallinn, Estonia. Direct sales offices in Belgium, Brazil, China, France, Germany, Great Britain, Hong Kong, Italy, Japan, Korea, Sweden, and the USA —together with a worldwide network of agents and distributors—support our internation­al customer base.
FLIR Systems is at the forefront of innovation in the infrared camera industry. We antici­pate market demand by constantly improving our existing cameras and developing new ones. The company has set milestones in product design and development such as the introduction of the first battery-operated portable camera for industrial inspections, and the first uncooled infrared camera, to mention just two innovations.
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Figure 12.2 LEFT: Thermovision Model 661 from 1969. The camera weighed approximately 25 kg
(55 lb.), the oscilloscope 20 kg (44 lb.), and the tripod 15 kg (33 lb.). The operator also needed a 220 VAC generator set, and a 10 L (2.6 US gallon) jar with liquid nitrogen. To the left of the oscilloscope the Polaroid attachment (6 kg/13 lb.) can be seen. RIGHT: FLIR i7 from 2012. Weight: 0.34 kg (0.75 lb.), including the battery.
About FLIR Systems
FLIR Systems manufactures all vital mechanical and electronic components of the cam­era systems itself. From detector design and manufacturing, to lenses and system elec­tronics, to final testing and calibration, all production steps are carried out and supervised by our own engineers. The in-depth expertise of these infrared specialists en­sures the accuracy and reliability of all vital components that are assembled into your in­frared camera.

12.1 More than just an infrared camera

At FLIR Systems we recognize that our job is to go beyond just producing the best infra­red camera systems. We are committed to enabling all users of our infrared camera sys­tems to work more productively by providing them with the most powerful camera– software combination. Especially tailored software for predictive maintenance, R & D, and process monitoring is developed in-house. Most software is available in a wide varie­ty of languages.
We support all our infrared cameras with a wide variety of accessories to adapt your equipment to the most demanding infrared applications.

12.2 Sharing our knowledge

Although our cameras are designed to be very user-friendly, there is a lot more to ther­mography than just knowing how to handle a camera. Therefore, FLIR Systems has founded the Infrared Training Center (ITC), a separate business unit, that provides certi­fied training courses. Attending one of the ITC courses will give you a truly hands-on learning experience.
The staff of the ITC are also there to provide you with any application support you may need in putting infrared theory into practice.

12.3 Supporting our customers

FLIR Systems operates a worldwide service network to keep your camera running at all times. If you discover a problem with your camera, local service centers have all the equipment and expertise to solve it within the shortest possible time. Therefore, there is no need to send your camera to the other side of the world or to talk to someone who does not speak your language.
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Figure 12.3 LEFT: Development of system electronics; RIGHT: Testing of an FPA detector
Figure 12.4 LEFT: Diamond turning machine; RIGHT: Lens polishing
Figure 12.5 LEFT: Testing of infrared cameras in the climatic chamber; RIGHT: Robot used for camera
testing and calibration
About FLIR Systems

12.4 A few images from our facilities

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Glossary

absorption (absorption factor)
atmosphere The gases between the object being measured and the camera, nor-
autoadjust A function making a camera perform an internal image correction. autopalette The IR image is shown with an uneven spread of colors, displaying
blackbody Totally non-reflective object. All its radiation is due to its own
blackbody radiator
calculated at­mospheric transmission
cavity radiator A bottle shaped radiator with an absorbing inside, viewed through
color temperature
conduction The process that makes heat diffuse into a material. continuous
adjust
convection
dual isotherm An isotherm with two color bands, instead of one. emissivity
(emissivity factor)
emittance Amount of energy emitted from an object per unit of time and area
environment
estimated at­mospheric transmission
external optics Extra lenses, filters, heat shields etc. that can be put between the
filter A material transparent only to some of the infrared wavelengths. FOV Field of view: The horizontal angle that can be viewed through an IR
FPA Focal plane array: A type of IR detector. graybody An object that emits a fixed fraction of the amount of energy of a
IFOV Instantaneous field of view: A measure of the geometrical resolution
The amount of radiation absorbed by an object relative to the re­ceived radiation. A number between 0 and 1.
mally air.
cold objects as well as hot ones at the same time.
temperature. An IR radiating equipment with blackbody properties used to cali-
brate IR cameras. A transmission value computed from the temperature, the relative
humidity of air and the distance to the object.
the bottleneck. The temperature for which the color of a blackbody matches a spe-
cific color.
A function that adjusts the image. The function works all the time, continuously adjusting brightness and contrast according to the im­age content.
Convection is a heat transfer mode where a fluid is brought into mo­tion, either by gravity or another force, thereby transferring heat from one place to another.
The amount of radiation coming from an object, compared to that of a blackbody. A number between 0 and 1.
2
(W/m
)
Objects and gases that emit radiation towards the object being measured.
A transmission value, supplied by a user, replacing a calculated one
camera and the object being measured.
lens.
blackbody for each wavelength.
of an IR camera.
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Glossary
image correc­tion (internal or
A way of compensating for sensitivity differences in various parts of live images and also of stabilizing the camera.
external) infrared Non-visible radiation, having a wavelength from about 2–13 μm. IR infrared
isotherm A function highlighting those parts of an image that fall above, below
or between one or more temperature intervals.
isothermal cavity
A bottle-shaped radiator with a uniform temperature viewed through the bottleneck.
Laser LocatIR An electrically powered light source on the camera that emits laser
radiation in a thin, concentrated beam to point at certain parts of the object in front of the camera.
laser pointer An electrically powered light source on the camera that emits laser
radiation in a thin, concentrated beam to point at certain parts of the object in front of the camera.
level The center value of the temperature scale, usually expressed as a
signal value. manual adjust A way to adjust the image by manually changing certain parameters. NETD Noise equivalent temperature difference. A measure of the image
noise level of an IR camera. noise Undesired small disturbance in the infrared image
object parameters
A set of values describing the circumstances under which the meas-
urement of an object was made, and the object itself (such as emis-
sivity, reflected apparent temperature, distance etc.) object signal A non-calibrated value related to the amount of radiation received by
the camera from the object. palette The set of colors used to display an IR image. pixel
Stands for picture element. One single spot in an image. radiance Amount of energy emitted from an object per unit of time, area and
2
/sr)
radiant power
angle (W/m
Amount of energy emitted from an object per unit of time (W) radiation The process by which electromagnetic energy, is emitted by an ob-
ject or a gas. radiator A piece of IR radiating equipment.
range
The current overall temperature measurement limitation of an IR
camera. Cameras can have several ranges. Expressed as two
blackbody temperatures that limit the current calibration. reference
temperature
A temperature which the ordinary measured values can be com-
pared with. reflection The amount of radiation reflected by an object relative to the re-
ceived radiation. A number between 0 and 1. relative
humidity
Relative humidity represents the ratio between the current water va-
pour mass in the air and the maximum it may contain in saturation
conditions. saturation
color
The areas that contain temperatures outside the present level/span
settings are colored with the saturation colors. The saturation colors
contain an ‘overflow’ color and an ‘underflow’ color. There is also a
third red saturation color that marks everything saturated by the de-
tector indicating that the range should probably be changed.
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Glossary
span
The interval of the temperature scale, usually expressed as a signal
value. spectral (radi-
ant) emittance temperature
difference, or
Amount of energy emitted from an object per unit of time, area and
wavelength (W/m
2
/μm)
A value which is the result of a subtraction between two temperature
values. difference of temperature.
temperature range
The current overall temperature measurement limitation of an IR
camera. Cameras can have several ranges. Expressed as two
blackbody temperatures that limit the current calibration. temperature
scale
The way in which an IR image currently is displayed. Expressed as
two temperature values limiting the colors. thermogram infrared image transmission
(or transmit­tance) factor
transparent isotherm
Gases and materials can be more or less transparent. Transmission
is the amount of IR radiation passing through them. A number be-
tween 0 and 1.
An isotherm showing a linear spread of colors, instead of covering
the highlighted parts of the image. visual Refers to the video mode of a IR camera, as opposed to the normal,
thermographic mode. When a camera is in video mode it captures
ordinary video images, while thermographic images are captured
when the camera is in IR mode.
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14

Thermographic measurement techniques

14.1 Introduction

An infrared camera measures and images the emitted infrared radiation from an object. The fact that radiation is a function of object surface temperature makes it possible for the camera to calculate and display this temperature.
However, the radiation measured by the camera does not only depend on the tempera­ture of the object but is also a function of the emissivity. Radiation also originates from the surroundings and is reflected in the object. The radiation from the object and the re­flected radiation will also be influenced by the absorption of the atmosphere.
To measure temperature accurately, it is therefore necessary to compensate for the ef­fects of a number of different radiation sources. This is done on-line automatically by the camera. The following object parameters must, however, be supplied for the camera:
• The emissivity of the object
• The reflected apparent temperature
• The distance between the object and the camera
• The relative humidity
• Temperature of the atmosphere

14.2 Emissivity

The most important object parameter to set correctly is the emissivity which, in short, is a measure of how much radiation is emitted from the object, compared to that from a per­fect blackbody of the same temperature.
Normally, object materials and surface treatments exhibit emissivity ranging from approx­imately 0.1 to 0.95. A highly polished (mirror) surface falls below 0.1, while an oxidized or painted surface has a higher emissivity. Oil-based paint, regardless of color in the visi­ble spectrum, has an emissivity over 0.9 in the infrared. Human skin exhibits an emissiv­ity 0.97 to 0.98.
Non-oxidized metals represent an extreme case of perfect opacity and high reflexivity, which does not vary greatly with wavelength. Consequently, the emissivity of metals is low – only increasing with temperature. For non-metals, emissivity tends to be high, and decreases with temperature.

14.2.1 Finding the emissivity of a sample

14.2.1.1 Step 1: Determining reflected apparent temperature Use one of the following two methods to determine reflected apparent temperature:
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Thermographic measurement techniques14
Figure 14.1 1 = Reflection source
Figure 14.2 1 = Reflection source
14.2.1.1.1 Method 1: Direct method
Follow this procedure:
1. Look for possible reflection sources, considering that the incident angle = reflection angle (a = b).
2. If the reflection source is a spot source, modify the source by obstructing it using a piece if cardboard.
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Thermographic measurement techniques14
Figure 14.3 1 = Reflection source
Note
Using a thermocouple to measure reflected apparent temperature is not recommended for two impor­tant reasons:
• A thermocouple does not measure radiation intensity
• A thermocouple requires a very good thermal contact to the surface, usually by gluing and covering the sensor by a thermal isolator.
Figure 14.4 Measuring the apparent temperature of the aluminum foil.
3. Measure the radiation intensity (= apparent temperature) from the reflecting source using the following settings:
• Emissivity: 1.0
• D
: 0
obj
You can measure the radiation intensity using one of the following two methods:
14.2.1.1.2 Method 2: Reflector method
Follow this procedure:
1. Crumble up a large piece of aluminum foil.
2. Uncrumble the aluminum foil and attach it to a piece of cardboard of the same size.
3. Put the piece of cardboard in front of the object you want to measure. Make sure that the side with aluminum foil points to the camera.
4. Set the emissivity to 1.0.
5. Measure the apparent temperature of the aluminum foil and write it down.
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Thermographic measurement techniques14
14.2.1.2 Step 2: Determining the emissivity
Follow this procedure:
1. Select a place to put the sample.
2. Determine and set reflected apparent temperature according to the previous procedure.
3. Put a piece of electrical tape with known high emissivity on the sample.
4. Heat the sample at least 20 K above room temperature. Heating must be reasonably even.
5. Focus and auto-adjust the camera, and freeze the image.
6. Adjust Level and Span for best image brightness and contrast.
7. Set emissivity to that of the tape (usually 0.97).
8. Measure the temperature of the tape using one of the following measurement functions:
Isotherm (helps you to determine both the temperature and how evenly you have
heated the sample)
Spot (simpler)
Box Avg (good for surfaces with varying emissivity).
9. Write down the temperature.
10. Move your measurement function to the sample surface.
11. Change the emissivity setting until you read the same temperature as your previous measurement.
12. Write down the emissivity.
Note
• Avoid forced convection
• Look for a thermally stable surrounding that will not generate spot reflections
• Use high quality tape that you know is not transparent, and has a high emissivity you are certain of
• This method assumes that the temperature of your tape and the sample surface are the same. If they are not, your emissivity measurement will be wrong.

14.3 Reflected apparent temperature

This parameter is used to compensate for the radiation reflected in the object. If the emissivity is low and the object temperature relatively far from that of the reflected it will be important to set and compensate for the reflected apparent temperature correctly.

14.4 Distance

The distance is the distance between the object and the front lens of the camera. This parameter is used to compensate for the following two facts:
• That radiation from the target is absorbed by the atmosphere between the object and the camera.
• That radiation from the atmosphere itself is detected by the camera.

14.5 Relative humidity

The camera can also compensate for the fact that the transmittance is also dependent on the relative humidity of the atmosphere. To do this set the relative humidity to the cor­rect value. For short distances and normal humidity the relative humidity can normally be left at a default value of 50%.

14.6 Other parameters

In addition, some cameras and analysis programs from FLIR Systems allow you to com­pensate for the following parameters:
• Atmospheric temperature – i.e. the temperature of the atmosphere between the cam­era and the target
• External optics temperature – i.e. the temperature of any external lenses or windows used in front of the camera
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Thermographic measurement techniques14
• External optics transmittance – i.e. the transmission of any external lenses or windows used in front of the camera
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Figure 15.1 Sir William Herschel (1738–1822)
Figure 15.2 Marsilio Landriani (1746–1815)

History of infrared technology

Before the year 1800, the existence of the infrared portion of the electromagnetic spec­trum wasn't even suspected. The original significance of the infrared spectrum, or simply ‘the infrared’ as it is often called, as a form of heat radiation is perhaps less obvious to­day than it was at the time of its discovery by Herschel in 1800.
The discovery was made accidentally during the search for a new optical material. Sir William Herschel – Royal Astronomer to King George III of England, and already famous for his discovery of the planet Uranus – was searching for an optical filter material to re­duce the brightness of the sun’s image in telescopes during solar observations. While testing different samples of colored glass which gave similar reductions in brightness he was intrigued to find that some of the samples passed very little of the sun’s heat, while others passed so much heat that he risked eye damage after only a few seconds’ observation.
Herschel was soon convinced of the necessity of setting up a systematic experiment, with the objective of finding a single material that would give the desired reduction in brightness as well as the maximum reduction in heat. He began the experiment by ac­tually repeating Newton’s prism experiment, but looking for the heating effect rather than the visual distribution of intensity in the spectrum. He first blackened the bulb of a sensi­tive mercury-in-glass thermometer with ink, and with this as his radiation detector he pro­ceeded to test the heating effect of the various colors of the spectrum formed on the top of a table by passing sunlight through a glass prism. Other thermometers, placed outside the sun’s rays, served as controls.
As the blackened thermometer was moved slowly along the colors of the spectrum, the temperature readings showed a steady increase from the violet end to the red end. This was not entirely unexpected, since the Italian researcher, Landriani, in a similar experi­ment in 1777 had observed much the same effect. It was Herschel, however, who was the first to recognize that there must be a point where the heating effect reaches a maxi­mum, and that measurements confined to the visible portion of the spectrum failed to lo­cate this point.
Moving the thermometer into the dark region beyond the red end of the spectrum, Her­schel confirmed that the heating continued to increase. The maximum point, when he found it, lay well beyond the red end – in what is known today as the ‘infrared wavelengths’.
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Figure 15.3 Macedonio Melloni (1798–1854)
History of infrared technology
When Herschel revealed his discovery, he referred to this new portion of the electromag­netic spectrum as the ‘thermometrical spectrum’. The radiation itself he sometimes re­ferred to as ‘dark heat’, or simply ‘the invisible rays’. Ironically, and contrary to popular opinion, it wasn't Herschel who originated the term ‘infrared’. The word only began to ap­pear in print around 75 years later, and it is still unclear who should receive credit as the originator.
Herschel’s use of glass in the prism of his original experiment led to some early contro­versies with his contemporaries about the actual existence of the infrared wavelengths. Different investigators, in attempting to confirm his work, used various types of glass in­discriminately, having different transparencies in the infrared. Through his later experi­ments, Herschel was aware of the limited transparency of glass to the newly-discovered thermal radiation, and he was forced to conclude that optics for the infrared would prob­ably be doomed to the use of reflective elements exclusively (i.e. plane and curved mir­rors). Fortunately, this proved to be true only until 1830, when the Italian investigator, Melloni, made his great discovery that naturally occurring rock salt (NaCl) – which was available in large enough natural crystals to be made into lenses and prisms – is remark­ably transparent to the infrared. The result was that rock salt became the principal infra­red optical material, and remained so for the next hundred years, until the art of synthetic crystal growing was mastered in the 1930’s.
Thermometers, as radiation detectors, remained unchallenged until 1829, the year Nobili invented the thermocouple. (Herschel’s own thermometer could be read to 0.2 °C (0.036 °F), and later models were able to be read to 0.05 °C (0.09 °F)). Then a break­through occurred; Melloni connected a number of thermocouples in series to form the first thermopile. The new device was at least 40 times as sensitive as the best thermome­ter of the day for detecting heat radiation – capable of detecting the heat from a person standing three meters away.
The first so-called ‘heat-picture’ became possible in 1840, the result of work by Sir John Herschel, son of the discoverer of the infrared and a famous astronomer in his own right. Based upon the differential evaporation of a thin film of oil when exposed to a heat pat­tern focused upon it, the thermal image could be seen by reflected light where the inter­ference effects of the oil film made the image visible to the eye. Sir John also managed to obtain a primitive record of the thermal image on paper, which he called a ‘thermograph’.
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Figure 15.4 Samuel P. Langley (1834–1906)
History of infrared technology
The improvement of infrared-detector sensitivity progressed slowly. Another major break­through, made by Langley in 1880, was the invention of the bolometer. This consisted of a thin blackened strip of platinum connected in one arm of a Wheatstone bridge circuit upon which the infrared radiation was focused and to which a sensitive galvanometer re­sponded. This instrument is said to have been able to detect the heat from a cow at a distance of 400 meters.
An English scientist, Sir James Dewar, first introduced the use of liquefied gases as cool­ing agents (such as liquid nitrogen with a temperature of -196 °C (-320.8 °F)) in low tem­perature research. In 1892 he invented a unique vacuum insulating container in which it is possible to store liquefied gases for entire days. The common ‘thermos bottle’, used for storing hot and cold drinks, is based upon his invention.
Between the years 1900 and 1920, the inventors of the world ‘discovered’ the infrared. Many patents were issued for devices to detect personnel, artillery, aircraft, ships – and even icebergs. The first operating systems, in the modern sense, began to be developed during the 1914–18 war, when both sides had research programs devoted to the military exploitation of the infrared. These programs included experimental systems for enemy intrusion/detection, remote temperature sensing, secure communications, and ‘flying tor­pedo’ guidance. An infrared search system tested during this period was able to detect an approaching airplane at a distance of 1.5 km (0.94 miles), or a person more than 300 meters (984 ft.) away.
The most sensitive systems up to this time were all based upon variations of the bolome­ter idea, but the period between the two wars saw the development of two revolutionary new infrared detectors: the image converter and the photon detector. At first, the image converter received the greatest attention by the military, because it enabled an observer for the first time in history to literally ‘see in the dark’. However, the sensitivity of the im­age converter was limited to the near infrared wavelengths, and the most interesting mili­tary targets (i.e. enemy soldiers) had to be illuminated by infrared search beams. Since this involved the risk of giving away the observer’s position to a similarly-equipped enemy observer, it is understandable that military interest in the image converter eventually faded.
The tactical military disadvantages of so-called 'active’ (i.e. search beam-equipped) ther­mal imaging systems provided impetus following the 1939–45 war for extensive secret military infrared-research programs into the possibilities of developing ‘passive’ (no search beam) systems around the extremely sensitive photon detector. During this peri­od, military secrecy regulations completely prevented disclosure of the status of infrared­imaging technology. This secrecy only began to be lifted in the middle of the 1950’s, and from that time adequate thermal-imaging devices finally began to be available to civilian science and industry.
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Figure 16.1 The electromagnetic spectrum. 1: X-ray; 2: UV; 3: Visible; 4: IR; 5: Microwaves; 6:
Radiowaves.

16.3 Blackbody radiation

A blackbody is defined as an object which absorbs all radiation that impinges on it at any wavelength. The apparent misnomer black relating to an object emitting radiation is ex­plained by Kirchhoff’s Law (after Gustav Robert Kirchhoff, 1824–1887), which states that a body capable of absorbing all radiation at any wavelength is equally capable in the emission of radiation.

Theory of thermography

16.1 Introduction

The subjects of infrared radiation and the related technique of thermography are still new to many who will use an infrared camera. In this section the theory behind thermography will be given.

16.2 The electromagnetic spectrum

The electromagnetic spectrum is divided arbitrarily into a number of wavelength regions, called bands, distinguished by the methods used to produce and detect the radiation. There is no fundamental difference between radiation in the different bands of the elec­tromagnetic spectrum. They are all governed by the same laws and the only differences are those due to differences in wavelength.
Thermography makes use of the infrared spectral band. At the short-wavelength end the boundary lies at the limit of visual perception, in the deep red. At the long-wavelength end it merges with the microwave radio wavelengths, in the millimeter range.
The infrared band is often further subdivided into four smaller bands, the boundaries of which are also arbitrarily chosen. They include: the near infrared (0.75–3 μm), the middle infrared (3–6 μm), the far infrared (6–15 μm) and the extreme infrared (15–100 μm). Although the wavelengths are given in μm (micrometers), other units are often still used to measure wavelength in this spectral region, e.g. nanometer (nm) and Ångström (Å).
The relationships between the different wavelength measurements is:
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Figure 16.2 Gustav Robert Kirchhoff (1824–1887)
Figure 16.3 Max Planck (1858–1947)
where:
Theory of thermography
The construction of a blackbody source is, in principle, very simple. The radiation charac­teristics of an aperture in an isotherm cavity made of an opaque absorbing material rep­resents almost exactly the properties of a blackbody. A practical application of the principle to the construction of a perfect absorber of radiation consists of a box that is light tight except for an aperture in one of the sides. Any radiation which then enters the hole is scattered and absorbed by repeated reflections so only an infinitesimal fraction can possibly escape. The blackness which is obtained at the aperture is nearly equal to a blackbody and almost perfect for all wavelengths.
By providing such an isothermal cavity with a suitable heater it becomes what is termed a cavity radiator. An isothermal cavity heated to a uniform temperature generates black­body radiation, the characteristics of which are determined solely by the temperature of the cavity. Such cavity radiators are commonly used as sources of radiation in tempera­ture reference standards in the laboratory for calibrating thermographic instruments, such as a FLIR Systems camera for example.
If the temperature of blackbody radiation increases to more than 525°C (977°F), the source begins to be visible so that it appears to the eye no longer black. This is the incipi­ent red heat temperature of the radiator, which then becomes orange or yellow as the temperature increases further. In fact, the definition of the so-called color temperature of an object is the temperature to which a blackbody would have to be heated to have the same appearance.
Now consider three expressions that describe the radiation emitted from a blackbody.

16.3.1 Planck’s law

Max Planck (1858–1947) was able to describe the spectral distribution of the radiation from a blackbody by means of the following formula:
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Figure 16.4 Blackbody spectral radiant emittance according to Planck’s law, plotted for various absolute
temperatures. 1: Spectral radiant emittance (W/cm
This is Wien’s formula (after Wilhelm Wien, 1864–1928), which expresses mathemati­cally the common observation that colors vary from red to orange or yellow as the tem­perature of a thermal radiator increases. The wavelength of the color is the same as the wavelength calculated for λ
Theory of thermography
W
λb
c
h Planck’s constant = 6.6 × 10 k Boltzmann’s constant = 1.4 × 10 T Absolute temperature (K) of a blackbody.
λ Wavelength (μm).
Note
The factor 10
-6
is used since spectral emittance in the curves is expressed in Watt/m2, μm.
Blackbody spectral radiant emittance at wavelength λ.
Velocity of light = 3 × 10
8
m/s
-34
Joule sec.
-23
Joule/K.
Planck’s formula, when plotted graphically for various temperatures, produces a family of curves. Following any particular Planck curve, the spectral emittance is zero at λ = 0, then increases rapidly to a maximum at a wavelength λ
and after passing it ap-
max
proaches zero again at very long wavelengths. The higher the temperature, the shorter the wavelength at which maximum occurs.
2
× 103(μm)); 2: Wavelength (μm)

16.3.2 Wien’s displacement law

By differentiating Planck’s formula with respect to λ, and finding the maximum, we have:
. A good approximation of the value of λ
max
for a given
max
blackbody temperature is obtained by applying the rule-of-thumb 3 000/T μm. Thus, a very hot star such as Sirius (11 000 K), emitting bluish-white light, radiates with the peak of spectral radiant emittance occurring within the invisible ultraviolet spectrum, at wave­length 0.27 μm.
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Figure 16.5 Wilhelm Wien (1864–1928)
Figure 16.6 Planckian curves plotted on semi-log scales from 100 K to 1000 K. The dotted line represents
the locus of maximum radiant emittance at each temperature as described by Wien's displacement law. 1: Spectral radiant emittance (W/cm
This is the Stefan-Boltzmann formula (after Josef Stefan, 1835–1893, and Ludwig Boltz- mann, 1844–1906), which states that the total emissive power of a blackbody is propor­tional to the fourth power of its absolute temperature. Graphically, W
Theory of thermography
The sun (approx. 6 000 K) emits yellow light, peaking at about 0.5 μm in the middle of the visible light spectrum.
At room temperature (300 K) the peak of radiant emittance lies at 9.7 μm, in the far infra­red, while at the temperature of liquid nitrogen (77 K) the maximum of the almost insignif­icant amount of radiant emittance occurs at 38 μm, in the extreme infrared wavelengths.
2
(μm)); 2: Wavelength (μm).

16.3.3 Stefan-Boltzmann's law

By integrating Planck’s formula from λ = 0 to λ = ∞, we obtain the total radiant emittance (W
) of a blackbody:
b
represents the
b
area below the Planck curve for a particular temperature. It can be shown that the radiant emittance in the interval λ = 0 to λ
is only 25% of the total, which represents about the
max
amount of the sun’s radiation which lies inside the visible light spectrum.
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Figure 16.7 Josef Stefan (1835–1893), and Ludwig Boltzmann (1844–1906)
For opaque materials τλ= 0 and the relation simplifies to:
Another factor, called the emissivity, is required to describe the fraction ε of the radiant emittance of a blackbody produced by an object at a specific temperature. Thus, we have the definition:
The spectral emissivity ε
Generally speaking, there are three types of radiation source, distinguished by the ways in which the spectral emittance of each varies with wavelength.
• A blackbody, for which ε
Theory of thermography
Using the Stefan-Boltzmann formula to calculate the power radiated by the human body, at a temperature of 300 K and an external surface area of approx. 2 m
2
, we obtain 1 kW. This power loss could not be sustained if it were not for the compensating absorption of radiation from surrounding surfaces, at room temperatures which do not vary too drasti­cally from the temperature of the body – or, of course, the addition of clothing.

16.3.4 Non-blackbody emitters

So far, only blackbody radiators and blackbody radiation have been discussed. However, real objects almost never comply with these laws over an extended wavelength region – although they may approach the blackbody behavior in certain spectral intervals. For ex­ample, a certain type of white paint may appear perfectly white in the visible light spec­trum, but becomes distinctly gray at about 2 μm, and beyond 3 μm it is almost black.
There are three processes which can occur that prevent a real object from acting like a blackbody: a fraction of the incident radiation α may be absorbed, a fraction ρ may be re­flected, and a fraction τ may be transmitted. Since all of these factors are more or less wavelength dependent, the subscript λ is used to imply the spectral dependence of their definitions. Thus:
• The spectral absorptance α
= the ratio of the spectral radiant power absorbed by an
λ
object to that incident upon it.
• The spectral reflectance ρ
= the ratio of the spectral radiant power reflected by an ob-
λ
ject to that incident upon it.
• The spectral transmittance τ
= the ratio of the spectral radiant power transmitted
λ
through an object to that incident upon it.
The sum of these three factors must always add up to the whole at any wavelength, so we have the relation:
= the ratio of the spectral radiant power from an object to that
λ
from a blackbody at the same temperature and wavelength. Expressed mathematically, this can be written as the ratio of the spectral emittance of
the object to that of a blackbody as follows:
• A graybody, for which ε
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λ
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From this we obtain, for an opaque material (since αλ+ ρλ= 1):
For highly polished materials ελapproaches zero, so that for a perfectly reflecting materi-
For a graybody radiator, the Stefan-Boltzmann formula becomes:
This states that the total emissive power of a graybody is the same as a blackbody at the same temperature reduced in proportion to the value of ε from the graybody.
Figure 16.8 Spectral radiant emittance of three types of radiators. 1: Spectral radiant emittance; 2: Wave­length; 3: Blackbody; 4: Selective radiator; 5: Graybody.
Theory of thermography
• A selective radiator, for which ε varies with wavelength According to Kirchhoff’s law, for any material the spectral emissivity and spectral absorp-
tance of a body are equal at any specified temperature and wavelength. That is:
al (i.e. a perfect mirror) we have:
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Figure 16.9 Spectral emissivity of three types of radiators. 1: Spectral emissivity; 2: Wavelength; 3: Black-
body; 4: Graybody; 5: Selective radiator.
When the plate becomes opaque this formula is reduced to the single formula:
This last relation is a particularly convenient one, because it is often easier to measure reflectance than to measure emissivity directly.
Theory of thermography

16.4 Infrared semi-transparent materials

Consider now a non-metallic, semi-transparent body – let us say, in the form of a thick flat plate of plastic material. When the plate is heated, radiation generated within its volume must work its way toward the surfaces through the material in which it is partially ab­sorbed. Moreover, when it arrives at the surface, some of it is reflected back into the inte­rior. The back-reflected radiation is again partially absorbed, but some of it arrives at the other surface, through which most of it escapes; part of it is reflected back again. Although the progressive reflections become weaker and weaker they must all be added up when the total emittance of the plate is sought. When the resulting geometrical series is summed, the effective emissivity of a semi-transparent plate is obtained as:
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Figure 17.1 A schematic representation of the general thermographic measurement situation.1: Sur-
roundings; 2: Object; 3: Atmosphere; 4: Camera
or, with simplified notation:
where C is a constant. Should the source be a graybody with emittance ε, the received radiation would conse-
quently be εW

The measurement formula

As already mentioned, when viewing an object, the camera receives radiation not only from the object itself. It also collects radiation from the surroundings reflected via the ob­ject surface. Both these radiation contributions become attenuated to some extent by the atmosphere in the measurement path. To this comes a third radiation contribution from the atmosphere itself.
This description of the measurement situation, as illustrated in the figure below, is so far a fairly true description of the real conditions. What has been neglected could for in­stance be sun light scattering in the atmosphere or stray radiation from intense radiation sources outside the field of view. Such disturbances are difficult to quantify, however, in most cases they are fortunately small enough to be neglected. In case they are not negli­gible, the measurement configuration is likely to be such that the risk for disturbance is obvious, at least to a trained operator. It is then his responsibility to modify the measure­ment situation to avoid the disturbance e.g. by changing the viewing direction, shielding off intense radiation sources etc.
Accepting the description above, we can use the figure below to derive a formula for the calculation of the object temperature from the calibrated camera output.
Assume that the received radiation power W from a blackbody source of temperature T
on short distance generates a camera output signal U
source
the power input (power linear camera). We can then write (Equation 1):
We are now ready to write the three collected radiation power terms:
1. Emission from the object = ετW
transmittance of the atmosphere. The object temperature is T
source
.
, where ε is the emittance of the object and τ is the
obj
that is proportional to
source
.
obj
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We multiply each term by the constant C of Equation 1 and replace the CW products by the corresponding U according to the same equation, and get (Equation 3):
Solve Equation 3 for U
This is the general measurement formula used in all the FLIR Systems thermographic equipment. The voltages of the formula are:
The measurement formula
2. Reflected emission from ambient sources = (1 – ε)τW
tance of the object. The ambient sources have the temperature T It has here been assumed that the temperature T
, where (1 – ε) is the reflec-
refl
.
refl
is the same for all emitting surfa-
refl
ces within the halfsphere seen from a point on the object surface. This is of course sometimes a simplification of the true situation. It is, however, a necessary simplifica­tion in order to derive a workable formula, and T
can – at least theoretically – be giv-
refl
en a value that represents an efficient temperature of a complex surrounding. Note also that we have assumed that the emittance for the surroundings = 1. This is
correct in accordance with Kirchhoff’s law: All radiation impinging on the surrounding surfaces will eventually be absorbed by the same surfaces. Thus the emittance = 1. (Note though that the latest discussion requires the complete sphere around the ob­ject to be considered.)
3. Emission from the atmosphere = (1 – τ)τW
mosphere. The temperature of the atmosphere is T
, where (1 – τ) is the emittance of the at-
atm
atm
.
The total received radiation power can now be written (Equation 2):
(Equation 4):
obj
Table 17.1 Voltages
U
obj
U
tot
U
refl
U
atm
Calculated camera output voltage for a blackbody of temperature T
i.e. a voltage that can be directly converted into true requested
obj
object temperature.
Measured camera output voltage for the actual case.
Theoretical camera output voltage for a blackbody of temperature T
according to the calibration.
refl
Theoretical camera output voltage for a blackbody of temperature T
according to the calibration.
atm
The operator has to supply a number of parameter values for the calculation:
• the object emittance ε,
• the relative humidity,
• T
atm
• object distance (D
obj
)
• the (effective) temperature of the object surroundings, or the reflected ambient tem-
perature T
• the temperature of the atmosphere T
refl
, and
atm
This task could sometimes be a heavy burden for the operator since there are normally no easy ways to find accurate values of emittance and atmospheric transmittance for the actual case. The two temperatures are normally less of a problem provided the surround­ings do not contain large and intense radiation sources.
A natural question in this connection is: How important is it to know the right values of these parameters? It could though be of interest to get a feeling for this problem already here by looking into some different measurement cases and compare the relative
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Figure 17.2 Relative magnitudes of radiation sources under varying measurement conditions (SW cam-
era). 1: Object temperature; 2: Emittance; Obj: Object radiation; Refl: Reflected radiation; Atm: atmos­phere radiation. Fixed parameters: τ = 0.88; T
The measurement formula
magnitudes of the three radiation terms. This will give indications about when it is impor­tant to use correct values of which parameters.
The figures below illustrates the relative magnitudes of the three radiation contributions for three different object temperatures, two emittances, and two spectral ranges: SW and LW. Remaining parameters have the following fixed values:
• τ = 0.88
• T
= +20°C (+68°F)
refl
• T
= +20°C (+68°F)
atm
It is obvious that measurement of low object temperatures are more critical than measur­ing high temperatures since the ‘disturbing’ radiation sources are relatively much stron­ger in the first case. Should also the object emittance be low, the situation would be still more difficult.
We have finally to answer a question about the importance of being allowed to use the calibration curve above the highest calibration point, what we call extrapolation. Imagine that we in a certain case measure U
= 4.5 volts. The highest calibration point for the
tot
camera was in the order of 4.1 volts, a value unknown to the operator. Thus, even if the object happened to be a blackbody, i.e. U
obj
= U
, we are actually performing extrapola-
tot
tion of the calibration curve when converting 4.5 volts into temperature. Let us now assume that the object is not black, it has an emittance of 0.75, and the trans-
mittance is 0.92. We also assume that the two second terms of Equation 4 amount to 0.5 volts together. Computation of U
by means of Equation 4 then results in U
obj
obj
= 4.5 /
0.75 / 0.92 – 0.5 = 6.0. This is a rather extreme extrapolation, particularly when consider­ing that the video amplifier might limit the output to 5 volts! Note, though, that the applica­tion of the calibration curve is a theoretical procedure where no electronic or other limitations exist. We trust that if there had been no signal limitations in the camera, and if it had been calibrated far beyond 5 volts, the resulting curve would have been very much the same as our real curve extrapolated beyond 4.1 volts, provided the calibration algo­rithm is based on radiation physics, like the FLIR Systems algorithm. Of course there must be a limit to such extrapolations.
#T559828; r. AB/ 9452/9452; en-US
= 20°C (+68°F); T
refl
= 20°C (+68°F).
atm
49
17
Figure 17.3 Relative magnitudes of radiation sources under varying measurement conditions (LW cam-
era). 1: Object temperature; 2: Emittance; Obj: Object radiation; Refl: Reflected radiation; Atm: atmos­phere radiation. Fixed parameters: τ = 0.88; T
The measurement formula
= 20°C (+68°F); T
refl
= 20°C (+68°F).
atm
#T559828; r. AB/ 9452/9452; en-US
50
18

Emissivity tables

This section presents a compilation of emissivity data from the infrared literature and measurements made by FLIR Systems.

18.1 References

1. Mikaél A. Bramson: Infrared Radiation, A Handbook for Applications, Plenum press,
N.Y.
2. William L. Wolfe, George J. Zissis: The Infrared Handbook, Office of Naval Research,
Department of Navy, Washington, D.C.
3. Madding, R. P.: Thermographic Instruments and systems. Madison, Wisconsin: Uni-
versity of Wisconsin – Extension, Department of Engineering and Applied Science.
4. William L. Wolfe: Handbook of Military Infrared Technology, Office of Naval Research,
Department of Navy, Washington, D.C.
5. Jones, Smith, Probert: External thermography of buildings..., Proc. of the Society of
Photo-Optical Instrumentation Engineers, vol.110, Industrial and Civil Applications of Infrared Technology, June 1977 London.
6. Paljak, Pettersson: Thermography of Buildings, Swedish Building Research Institute,
Stockholm 1972.
7. Vlcek, J: Determination of emissivity with imaging radiometers and some emissivities
at λ = 5 µm. Photogrammetric Engineering and Remote Sensing.
8. Kern: Evaluation of infrared emission of clouds and ground as measured by weather
satellites, Defence Documentation Center, AD 617 417.
9. Öhman, Claes: Emittansmätningar med AGEMA E-Box. Teknisk rapport, AGEMA
1999. (Emittance measurements using AGEMA E-Box. Technical report, AGEMA
1999.)
10. Matteï, S., Tang-Kwor, E: Emissivity measurements for Nextel Velvet coating 811-21
between –36°C AND 82°C.
11. Lohrengel & Todtenhaupt (1996)
12. ITC Technical publication 32.
13. ITC Technical publication 29.
Note
The emissivity values in the table below are recorded using a shortwave (SW) camera. The values should be regarded as recommendations only and used with caution.

18.2 Tables

Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference
1 2 3 4 5 6
3M type 35 Vinyl electrical
3M type 88 Black vinyl electri-
3M type 88 Black vinyl electri-
3M type Super 33 +
Aluminum anodized sheet 100 T 0.55 2 Aluminum anodized, black,
Aluminum anodized, black,
Aluminum anodized, light
Aluminum anodized, light
tape (several colors)
cal tape
cal tape
Black vinyl electri­cal tape
dull
dull
gray, dull
gray, dull
< 80 LW Ca. 0.96 13
< 105 LW Ca. 0.96 13
< 105 MW < 0.96 13
< 80 LW Ca. 0.96 13
70
70 LW 0.95 9
70
70 LW 0.97 9
SW
SW
0.67 9
0.61 9
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Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Aluminum as received, plate 100 T 0.09 4
Aluminum as received,
sheet
Aluminum cast, blast
cleaned
Aluminum cast, blast
cleaned
Aluminum
dipped in HNO plate
Aluminum foil
Aluminum foil
Aluminum oxidized, strongly 50–500 T 0.2–0.3 1
Aluminum polished 50–100 T 0.04–0.06 1
Aluminum polished plate 100 T 0.05 4
Aluminum polished, sheet 100 T 0.05 2
Aluminum rough surface
Aluminum roughened 27 10 µm 0.18 3
Aluminum roughened 27 3 µm 0.28 3
Aluminum sheet, 4 samples
differently scratched
Aluminum sheet, 4 samples
differently scratched
Aluminum
vacuum deposited
Aluminum weathered,
heavily
Aluminum bronze 20 T 0.60 1 Aluminum
powder T 0.28 1
hydroxide
Aluminum oxide activated, powder T 0.46 1
Aluminum oxide pure, powder
(alumina)
Asbestos board 20 T 0.96 1 Asbestos fabric T 0.78 1 Asbestos floor tile Asbestos
paper 40–400 T 0.93–0.95 1
Asbestos powder T 0.40–0.60 1
Asbestos slate 20 T 0.96 1 Asphalt paving 4 LLW 0.967 8
Brass dull, tarnished 20–350 T 0.22 1
Brass oxidized 100 T 0.61 2 Brass oxidized 70 Brass oxidized 70 LW 0.03–0.07 9 Brass oxidized at 600°C Brass polished 200 T 0.03 1
100 T 0.09 2
70
SW
0.47 9
70 LW 0.46 9
100 T 0.05 4
,
3
27 10 µm 0.04 3
27 3 µm 0.09 3
20–50 T 0.06–0.07 1
70
SW
0.05–0.08 9
70 LW 0.03–0.06 9
20 T 0.04 2
17
SW
0.83–0.94 5
T 0.16 1
35
SW
SW
0.94 7
0.04–0.09 9
200–600 T 0.59–0.61 1
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Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Brass polished, highly 100 T 0.03 2
Brass rubbed with 80-
grit emery
Brass sheet, rolled 20 T 0.06 1
Brass sheet, worked
with emery
Brick alumina 17 Brick
common 17
Brick Dinas silica,
glazed, rough
Brick Dinas silica,
refractory
Brick Dinas silica, un-
glazed, rough
Brick firebrick Brick fireclay
Brick fireclay
Brick fireclay
Brick
Brick
masonry 35
masonry, plastered
Brick red, common 20 T 0.93 2
Brick red, rough 20 T 0.88–0.93 1
Brick refractory,
corundum
Brick refractory,
magnesite
Brick refractory,
strongly radiating
Brick refractory, weakly
radiating
Brick
silica, 95% SiO
Brick sillimanite, 33%
SiO
, 64% Al2O
2
Brick waterproof
Bronze phosphor bronze 70
Bronze phosphor bronze 70 LW 0.06 9
Bronze polished 50 T 0.1 1
Bronze porous, rough 50–150 T 0.55 1
Bronze powder T 0.76–0.80 1
Carbon candle soot 20 T 0.95 2 Carbon charcoal powder T 0.96 1
Carbon
graphite powder T 0.97 1
Carbon graphite, filed
surface
Carbon
lampblack 20–400 T 0.95–0.97 1
Chipboard untreated 20 SW
20 T 0.20 2
20 T 0.2 1
SW SW
0.68 5
0.86–0.81 5
1100 T 0.85 1
1000 T 0.66 1
1000 T 0.80 1
17
SW
0.68 5
1000 T 0.75 1
1200 T 0.59 1
20 T 0.85 1
SW
0.94 7
20 T 0.94 1
1000 T 0.46 1
1000–1300 T 0.38 1
500–1000 T 0.8–0.9 1
500–1000 T 0.65–0.75 1
1230 T 0.66 1
2
1500 T 0.29 1
3
17
SW
SW
0.87 5
0.08 9
20 T 0.98 2
0.90 6
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Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Chromium
Chromium polished 500–1000 T 0.28–0.38 1
Clay fired
Cloth Concrete Concrete dry 36 SW
Concrete rough 17 SW
Concrete
Copper commercial,
Copper electrolytic, care-
Copper
Copper
Copper
Copper
Copper
Copper
Copper
Copper
Copper
Copper polished,
Copper pure, carefully
Copper
Copper dioxide
Copper oxide
Ebonite T 0.89 1 Emery
Enamel 20 T 0.9 1 Enamel lacquer 20 T 0.85–0.95 1
Fiber board hard, untreated 20
Fiber board masonite 70 Fiber board masonite 70 LW 0.88 9 Fiber board particle board 70
Fiber board particle board 70 LW 0.89 9
Fiber board porous, untreated 20
Gold
Gold polished, carefully
Gold
Granite
polished 50 T 0.10 1
70 T 0.91 1
black 20 T 0.98 1
20 T 0.92 2
0.95 7
0.97 5
walkway
burnished
fully polished
electrolytic, polished
molten 1100–1300 T 0.13–0.15 1
oxidized 50 T 0.6–0.7 1
oxidized to blackness
oxidized, black 27 T 0.78 4
oxidized, heavily 20 T 0.78 2
polished 50–100 T 0.02 1
polished 100 T 0.03 2
polished, commercial
mechanical
prepared surface
scraped 27 T 0.07 4
powder T 0.84 1
red, powder T 0.70 1
coarse 80 T 0.85 1
polished 130 T 0.018 1
polished, highly 100 T 0.02 2
polished 20 LLW 0.849 8
5
20 T 0.07 1
80 T 0.018 1
–34 T 0.006 4
27 T 0.03 4
22 T 0.015 4
22 T 0.008 4
200–600 T 0.02–0.03 1
LLW 0.974 8
T 0.88 1
SW
SW
SW
SW
0.85 6
0.75 9
0.77 9
0.85 6
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Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Granite
Granite rough, 4 different
Granite rough, 4 different
Gypsum
Ice: See Water Iron and steel cold rolled 70 Iron and steel cold rolled 70 LW 0.09 9 Iron and steel covered with red
Iron and steel electrolytic 100 T 0.05 4
Iron and steel electrolytic 22 T 0.05 4
Iron and steel electrolytic 260 T 0.07 4
Iron and steel electrolytic, care-
Iron and steel freshly worked
Iron and steel ground sheet 950–1100 T 0.55–0.61 1
Iron and steel heavily rusted
Iron and steel hot rolled 130 T 0.60 1 Iron and steel hot rolled 20 T 0.77 1 Iron and steel oxidized 100 T 0.74 4 Iron and steel oxidized 100 T 0.74 1 Iron and steel oxidized 1227 T 0.89 4 Iron and steel oxidized 125–525 T 0.78–0.82 1 Iron and steel oxidized 200 T 0.79 2 Iron and steel oxidized 200–600 T 0.80 1 Iron and steel oxidized strongly 50 T 0.88 1
Iron and steel oxidized strongly 500 T 0.98 1
Iron and steel polished 100 T 0.07 2
Iron and steel polished 400–1000 T 0.14–0.38 1
Iron and steel polished sheet 750–1050 T 0.52–0.56 1
Iron and steel rolled sheet 50 T 0.56 1 Iron and steel rolled, freshly
Iron and steel rough, plane
Iron and steel rusted red, sheet 22 T 0.69 4
Iron and steel rusted, heavily 17
Iron and steel rusty, red 20 T 0.69 1
Iron and steel shiny oxide layer,
Iron and steel shiny, etched 150 T 0.16 1
Iron and steel wrought, carefully
rough 21 LLW 0.879 8
samples
samples
rust
fully polished
with emery
sheet
surface
sheet,
polished
70
70 LW 0.77–0.87 9
20 T 0.8–0.9 1
20 T 0.61–0.85 1
175–225 T 0.05–0.06 1
20 T 0.24 1
20 T 0.69 2
20 T 0.24 1
50 T 0.95–0.98 1
20 T 0.82 1
40–250 T 0.28 1
SW
SW
SW
0.95–0.97 9
0.20 9
0.96 5
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Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Iron galvanized heavily oxidized 70
Iron galvanized heavily oxidized 70 LW 0.85 9
Iron galvanized sheet 92 T 0.07 4
Iron galvanized sheet, burnished 30 T 0.23 1
Iron galvanized sheet, oxidized 20 T 0.28 1
Iron tinned sheet 24 T 0.064 4 Iron, cast casting 50 T 0.81 1
Iron, cast ingots 1000 T 0.95 1
Iron, cast liquid 1300 T 0.28 1
Iron, cast machined 800–1000 T 0.60–0.70 1
Iron, cast oxidized 100 T 0.64 2
Iron, cast oxidized 260 T 0.66 4
Iron, cast oxidized 38 T 0.63 4
Iron, cast oxidized 538 T 0.76 4
Iron, cast
Iron, cast polished 200 T 0.21 1
Iron, cast polished 38 T 0.21 4
Iron, cast polished 40 T 0.21 2
Iron, cast unworked 900–1100 T 0.87–0.95 1
Krylon Ultra-flat black 1602
Krylon Ultra-flat black 1602
Lacquer 3 colors sprayed
Lacquer 3 colors sprayed
Lacquer Aluminum on
Lacquer bakelite 80 T 0.83 1
Lacquer black, dull 40–100 T 0.96–0.98 1
Lacquer black, matte 100 T 0.97 2
Lacquer black, shiny,
Lacquer heat–resistant 100 T 0.92 1
Lacquer white 100 T 0.92 2
Lacquer white 40–100 T 0.8–0.95 1
Lead Lead oxidized, gray 20 T 0.28 1
Lead oxidized, gray 22 T 0.28 4
Lead shiny 250 T 0.08 1
Lead unoxidized,
Lead red 100 T 0.93 4 Lead red, powder 100 T 0.93 1
oxidized at 600°C
Flat black Room tempera-
Flat black Room tempera-
on Aluminum
on Aluminum
rough surface
sprayed on iron
oxidized at 200°C
polished
200–600 T 0.64–0.78 1
ture up to 175
ture up to 175
70
70 LW 0.92–0.94 9
20 T 0.4 1
20 T 0.87 1
200 T 0.63 1
100 T 0.05 4
SW
LW Ca. 0.96
MW
SW
0.64 9
Ca. 0.97
0.50–0.53 9
12
12
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Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Leather tanned T 0.75–0.80 1 Lime T 0.3–0.4 1 Magnesium 22 T 0.07 4
Magnesium 260 T 0.13 4
Magnesium 538 T 0.18 4
Magnesium polished 20 T 0.07 2
Magnesium powder
Molybdenum 1500–2200 T 0.19–0.26 1
Molybdenum 600–1000 T 0.08–0.13 1
Molybdenum filament
Mortar 17 Mortar dry 36
Nextel Velvet 811-21 Black
Nichrome rolled 700 T 0.25 1 Nichrome sandblasted 700 T 0.70 1 Nichrome wire, clean 50 T 0.65 1
Nichrome wire, clean 500–1000 T 0.71–0.79 1
Nichrome wire, oxidized 50–500 T 0.95–0.98 1
Nickel bright matte 122 T 0.041 4
Nickel commercially
Nickel commercially
Nickel electrolytic 22 T 0.04 4
Nickel electrolytic 260 T 0.07 4
Nickel electrolytic 38 T 0.06 4
Nickel electrolytic 538 T 0.10 4
Nickel electroplated on
Nickel electroplated on
Nickel electroplated on
Nickel electroplated,
Nickel oxidized 1227 T 0.85 4 Nickel oxidized 200 T 0.37 2 Nickel oxidized 227 T 0.37 4 Nickel Nickel polished 122 T 0.045 4
Nickel wire 200–1000 T 0.1–0.2 1 Nickel oxide 1000–1250 T 0.75–0.86 1 Nickel oxide 500–650 T 0.52–0.59 1 Oil, lubricating 0.025 mm film
Flat black –60–150 LW > 0.97 10 and
pure, polished
pure, polished
iron, polished
iron, unpolished
iron, unpolished
polished
oxidized at 600°C
700–2500 T 0.1–0.3 1
100 T 0.045 1
200–400 T 0.07–0.09 1
22 T 0.045 4
20 T 0.11–0.40 1
22 T 0.11 4
20 T 0.05 2
200–600 T 0.37–0.48 1
20 T 0.27 2
T 0.86 1
SW SW
0.87 5
0.94 7
11
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Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Oil, lubricating 0.050 mm film
Oil, lubricating 0.125 mm film
Oil, lubricating film on Ni base:
Oil, lubricating thick coating 20 T 0.82 2
Paint 8 different colors
Paint 8 different colors
Paint Aluminum, vari-
Paint cadmium yellow T 0.28–0.33 1
Paint chrome green T 0.65–0.70 1
Paint cobalt blue T 0.7–0.8 1 Paint oil 17 Paint oil based, aver-
Paint oil, black flat
Paint oil, black gloss 20
Paint oil, gray flat
Paint oil, gray gloss 20
Paint oil, various colors 100 T 0.92–0.96 1
Paint plastic, black 20
Paint plastic, white 20
Paper 4 different colors
Paper 4 different colors
Paper black T 0.90 1
Paper black, dull T 0.94 1
Paper black, dull 70
Paper black, dull 70 LW 0.89 9
Paper blue, dark T 0.84 1
Paper coated with black
Paper
Paper red T 0.76 1
Paper white 20 T 0.7–0.9 1
Paper white bond 20 T 0.93 2
Paper white, 3 different
Paper white, 3 different
Paper yellow T 0.72 1
Plaster 17 Plaster plasterboard,
Ni base only
and qualities
and qualities
ous ages
age of 16 colors
lacquer
green
glosses
glosses
untreated
20 T 0.46 2
20 T 0.72 2
20 T 0.05 2
70
70 LW 0.92–0.94 9
50–100 T 0.27–0.67 1
100 T 0.94 2
20
20
70
70 LW 0.92–0.94 9
70
70 LW 0.88–0.90 9
20
SW
SW
SW
SW
SW
SW
SW
SW
SW
SW
T 0.93 1
T 0.85 1
SW
SW SW
0.88–0.96 9
0.87 5
0.94 6
0.92 6
0.97 6
0.96 6
0.95 6
0.84 6
0.68–0.74 9
0.86 9
0.76–0.78 9
0.86 5
0.90 6
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Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Plaster rough coat 20 T 0.91 2
Plastic glass fibre lami-
Plastic glass fibre lami-
Plastic polyurethane iso-
Plastic polyurethane iso-
Plastic
Plastic PVC, plastic floor,
Platinum 100 T 0.05 4 Platinum 1000–1500 T 0.14–0.18 1 Platinum 1094 T 0.18 4 Platinum 17 T 0.016 4 Platinum 22 T 0.03 4 Platinum 260 T 0.06 4 Platinum 538 T 0.10 4 Platinum pure, polished 200–600 T 0.05–0.10 1
Platinum ribbon 900–1100 T 0.12–0.17 1 Platinum wire 1400 T 0.18 1 Platinum wire 500–1000 T 0.10–0.16 1 Platinum wire 50–200 T 0.06–0.07 1 Porcelain glazed 20 T 0.92 1
Porcelain white, shiny T 0.70–0.75 1
Rubber hard 20 T 0.95 1 Rubber soft, gray, rough
Sand Sand Sandstone
Sandstone rough 19 LLW 0.935 8
Silver
Silver pure, polished 200–600 T 0.02–0.03 1
Skin Slag
Slag boiler 1400–1800 T 0.69–0.67 1
Slag boiler 200–500 T 0.89–0.78 1
Slag
Snow: See Water Soil
Soil saturated with
nate (printed circ. board)
nate (printed circ. board)
lation board
lation board PVC, plastic floor,
dull, structured
dull, structured
polished 19 LLW 0.909 8
polished 100 T 0.03 2
human 32 T 0.98 2 boiler 0–100 T 0.97–0.93 1
boiler 600–1200 T 0.76–0.70 1
dry 20 T 0.92 2
water
70
70 LW 0.91 9
70 LW 0.55 9
70
70
70 LW 0.93 9
20 T 0.95 1
20 T 0.90 2
20 T 0.95 2
SW
SW
SW
T 0.60 1
0.94 9
0.29 9
0.94 9
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Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Stainless steel
Stainless steel Stainless steel Stainless steel sheet, polished 70 SW
Stainless steel
Stainless steel sheet, untreated,
Stainless steel
Stainless steel type 18-8, buffed
Stainless steel
Stucco
Styrofoam insulation 37 SW
Tar T 0.79–0.84 1 Tar
Tile glazed 17
Tin burnished 20–50 T 0.04–0.06 1 Tin tin–plated sheet
Titanium oxidized at 540°C Titanium oxidized at 540°C Titanium Titanium polished 1000 T 0.36 1
Titanium polished 200 T 0.15 1
Titanium polished 500 T 0.20 1
Tungsten 1500–2200 T 0.24–0.31 1
Tungsten 200 T 0.05 1
Tungsten 600–1000 T 0.1–0.16 1
Tungsten filament
Varnish flat Varnish on oak parquet
Varnish on oak parquet
Wallpaper slight pattern,
Wallpaper slight pattern, red 20
Water distilled 20 T 0.96 2 Water frost crystals
Water ice, covered with
Water ice, smooth 0 T 0.97 1
Water ice, smooth –10 T 0.96 2
alloy, 8% Ni, 18% Cr
rolled 700 T 0.45 1 sandblasted 700 T 0.70 1
sheet, polished 70 LW 0.14 9
somewhat scratched
sheet, untreated, somewhat scratched
type 18-8, oxi­dized at 800°C
rough, lime 10–90 T 0.91 1
paper 20 T 0.91–0.93 1
iron
oxidized at 540°C
floor
floor
light gray
heavy frost
500 T 0.35 1
0.18 9
70
70 LW 0.28 9
20 T 0.16 2
60 T 0.85 2
100 T 0.07 2
1000 T 0.60 1 200 T 0.40 1 500 T 0.50 1
3300 T 0.39 1
20 70
70 LW 0.90–0.93 9
20
–10 T 0.98 2
0 T 0.98 1
SW
SW
SW SW
SW
SW
0.30 9
0.60 7
0.94 5
0.93 6
0.90 9
0.85 6
0.90 6
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Emissivity tables18
Table 18.1 T: Total spectrum; SW: 2–5 µm; LW: 8–14 µm, LLW: 6.5–20 µm; 1: Material; 2: Specification;
3:Temperature in °C; 4: Spectrum; 5: Emissivity: 6:Reference (continued)
1 2 3 4 5 6
Water layer >0.1 mm
Water Water Wood 17 Wood 19 LLW 0.962 8 Wood ground T 0.5–0.7 1
Wood pine, 4 different
Wood pine, 4 different
Wood planed 20 T 0.8–0.9 1
Wood planed oak 20 T 0.90 2
Wood planed oak 70
Wood planed oak 70 LW 0.88 9
Wood plywood, smooth,
Wood plywood,
Wood white, damp 20 T 0.7–0.8 1
Zinc Zinc oxidized surface Zinc polished 200–300 T 0.04–0.05 1
Zinc sheet 50 T 0.20 1
thick snow snow –10 T 0.85 2
samples
samples
dry
untreated
oxidized at 400°C
0–100 T 0.95–0.98 1
T 0.8 1
SW
70
70 LW 0.81–0.89 9
36
20
400 T 0.11 1 1000–1200 T 0.50–0.60 1
SW
SW
SW
SW
0.98 5
0.67–0.75 9
0.77 9
0.82 7
0.83 6
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T501027.xml; en-US; AB; 9452; 2013-10-18 T505552.xml; en-US; 9356; 2013-10-15 T505551.xml; en-US; 9354; 2013-10-15 T505469.xml; en-US; 8097; 2013-06-11 T505013.xml; en-US; 9229; 2013-10-03 T505545.xml; en-US; 9045; 2013-09-19 T505547.xml; en-US; 9045; 2013-09-19 T505550.xml; en-US; 9045; 2013-09-19 T505097.xml; en-US; 5929; 2012-10-29 T505470.xml; en-US; 5935; 2012-10-29 T505012.xml; en-US; 8134; 2013-06-12 T505007.xml; en-US; 9229; 2013-10-03 T505004.xml; en-US; 5937; 2012-10-29 T505000.xml; en-US; 9354; 2013-10-15 T505005.xml; en-US; 5939; 2012-10-29 T505001.xml; en-US; 9354; 2013-10-15 T505006.xml; en-US; 9354; 2013-10-15 T505002.xml; en-US; 9354; 2013-10-15
#T559828; r. AB/ 9452/9452; en-US
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Corporate Headquarters
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FLIR Systems, Inc. 27700 SW Parkway Ave. Wilsonville, OR 97070 USA Telephone: +1-503-498-3547
Website
http://www.flir.com
Customer support
http://support.flir.com
Publ. No.: T559828 Release: AB Commit: Head: 9452 Language: en-US Modified: 2013-10-18 Formatted: 2013-10-18
9452
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