Hello

I am now mainly starting to detect faulty electrical,termites.mechanical faults and leak detection.

When is it necessary to change the reflected temperature, or is there away to work out what it is when tweaking the emissivity.


ANY HELP MUCH APPRECIATED

Changing Reflected Temperature (also known as Background or T Ambient on some instruments) settings is necessary for accurate non-contact temperature measurement. This is true for both imaging and non-imaging radiometers.

If you perform qualitative imaging and leave your Emissivity control set to 1.0, values entered under the Reflected Temperature input will have no effect on temperature values obtained with your imager.

Should you utilize an Emittance value of less than 1.0, the radiometer will use the value entered under your instrument's Reflected Temperature input. If the Reflected Temperature value is inaccurate, your observed temperature values will be in error. In some cases, the amount of error can be significant.

The topic of Compensating for Reflected Temperature was covered in a previous Tip of the Week at IRINFO.ORG. More information, including instructions on how to utilize the Reflector Method are described within the Tip.

Hope this helps.

Jim Seffrin

Infraspection Institute
IRINFO.ORG
SuccessIRies.com

This message has been edited. Last edited by: Jim Seffrin,

OK Thanks for info if the Emissivity is set at 0.95 will that be suitable for most applications?

such as electrical boxes , termites (through plaster walls ) and leaks

Cheers

"OK Thanks for info if the Emissivity is set at 0.95 will that be suitable for most applications?

such as electrical boxes , termites (through plaster walls ) and leaks"

If the emissivity of the surface changes then you must set it to the correct level in order to do any temperature measurement.

Also, the camera sees the energy emitted from the surface and does not see through walls (of most common materials). This is a common misconception.

I would recommend Level 1 training if you have not already attended a course.

Hi Derko,
you should really set your reflected temperature for every application as well as setting your emissivity for every new material. I mirror Bobs thinking, you should attend a level one course and then maybe a level 2.
Cheers for getting me through mine Bob.

Perry Pearmain.