Message Board Thread - "Stainless steel reflecting sky temp"

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Stainless steel reflecting sky temp gfricks 12/7/2011
I'm curious as to how to adjust for stainless steel reflecting sky temp.

The apparent reflected temp of the ground and surroundings is approx 50F. The bottom half of the drum is reflecting this (SP4). The top half is reflecting the sky (SP5).

In my software, if I set the emissivity to 1, the sky temp in the picture shows -34F.

SP4 and SP5 *should* be the same temp, within a few degrees, based on the operation of the equipment. If I enter 50F as RAT for SP4, I have to enter -95F as RAT for SP5 to get the two temperatures to match.

Why is it -95F and not -34F for SP5? I want to make sure I'm understanding and looking at the image correctly.


Thanks in advance for the help.

 
Re:Stainless steel reflecting sky temp Linas 12/7/2011
Narrow your span. A level 1 course would help you too. ITC is a good provider of infrared training.
 
Re:Stainless steel reflecting sky temp Gary Orlove 12/9/2011
Please see my reply at my blog site at:

http://irinformir.blogspot.com/2011/12/stainless-steel-reflecting-sky-temp.html
 
Re:Stainless steel reflecting sky temp gfricks 12/9/2011
Thank you both for your replies. It helps out a lot.
 
Re:Stainless steel reflecting sky temp Collin Stefani 1/30/2012

Thank you so much for your post.
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