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  #1  
Old 10/27/15, 9:57 AM
Siu Ming(Kenneth) Leung Siu Ming(Kenneth) Leung is offline
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Question IR Imager Standard

Hi, my name is Kenneth Leung and I live in Hong Kong, I am happy to join this forum.I have taken John wonderful IR class recently.

Although I am not a home inspector, I am a Pest management professional. In order to find a good IR camera, Recently, I have read "Standard for Infrared Inspectionsto Detect Pests and Pest Related Damage" publisded by Infraspection instiution.

The standard states

1.0 Scope
This standard addresses criteria for infrared imaging equipment, such as spatial resolution and thermal
sensitivity.

7.0 Instrument Requirements

7.1.2 Spectral Range: the infrared imaging system shall operate within a spectral range from 2 to
14 μm. A spot radiometer or nonimaging line scanner is not sufficient.
7.1.3 The infrared thermal imaging system shall have a Minimum Resolvable Temperature
Difference (MRTD) of 0.1░C or less at 20░C.

=================
But I found most product spec do not states MRTD, just something like NETD,i.e <= 150mk,<=100mk. Is there some ways to convert this two standards? How can I tell from the spec that the camera meets this standard?

Thank you for your sharing!

Last edited by sleung; 10/27/15 at 11:21 AM..
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  #2  
Old 10/27/15, 1:17 PM
Jim Seffrin's Avatar
Jim Seffrin Jim Seffrin is offline
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Join Date: Feb 2008
Location: Burlington, NJ
Posts: 185
Default Re: IR Imager Standard

Dear Kenneth:

Welcome to the world of infrared thermography!

As to your questions regarding the Infraspection Standard, a spectral range from 2 to 14 μm means that you may use either a short wave (2 - 5.6 microns) or long wave (8 - 14 microns) imager for your inspections.

An MRTD of 0.1 C translates to 100 millikelvins. For qualifying equipment, you may use MRTD and NETD values interchangeably.

Should you have further questions you are welcome to contact me directly.





Jim Seffrin, Director

Infraspection Institute

425 Ellis Street
Burlington, NJ 08016
609-239-4788


MasterThermographer.com
SuccessIRies.com
IRINFO.ORG
IRINFOConference.com
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  #3  
Old 10/27/15, 1:20 PM
Siu Ming(Kenneth) Leung Siu Ming(Kenneth) Leung is offline
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Please Note: sleung is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: IR Imager Standard

Quote:
Originally Posted by jseffrin View Post
Dear Kenneth:

Welcome to the world of infrared thermography!

As to your questions regarding the Infraspection Standard, a spectral range from 2 to 14 μm means that you may use either a short wave (2 - 5.6 microns) or long wave (8 - 14 microns) imager for your inspections.

An MRTD of 0.1 C translates to 100 millikelvins. For qualifying equipment, you may use MRTD and NETD values interchangeably.

Should you have further questions you are welcome to contact me directly.
Great thanks! It is such a wonderful reply from you! I did hear from experienced home inspector that Infraspection is a good IR school, which is very true!

I shall have some follow up questions to PM you, thanks!

Kenneth
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  #4  
Old 10/27/15, 2:08 PM
John McKenna, CMI's Avatar
John McKenna, CMI John McKenna, CMI is offline
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Join Date: Jun 2006
Location: College Station, Tx
Posts: 15,576
Default Re: IR Imager Standard

Quote:
Originally Posted by sleung View Post
Great thanks! It is such a wonderful reply from you! I did hear from experienced home inspector that Infraspection is a good IR school, which is very true!

I shall have some follow up questions to PM you, thanks!

Kenneth
Jim and Infraspection are very well respected within the thermography industry.




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John McKenna, CMI,
Building Science & Certified Level II Thermographer
InterNACHI's Thermal Imaging Instructor
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Infrared Class - For Home Inspector


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