Action
Step
Measure the radiation intensity (= apparent temperature) from the reflecting source
using the following settings:
■
Emissivity: 1.0
■
D
obj
: 0
You can measure the radiation intensity using one of the following two methods:
10589003;a2
Figure 18.3 1 = Reflection source
3
➲
Please note the following:
Using a thermocouple to measure reflecting 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.
18.2.1.1.2
Method 2: Reflector method
Action
Step
Crumble up a large piece of aluminum foil.
1
Uncrumble the aluminum foil and attach it to a piece of cardboard of the same
size.
2
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.
3
Set the emissivity to 1.0.
4
18
Publ. No. 1557954 Rev. a155 – ENGLISH (EN) – February 7, 2006
177
18 – Thermographic measurement techniques
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