Measurement Technique For Thermographic Inspection Of Electrical Installations; How To Correctly Set The Equipment; Temperature Measurement - FLIR ThermaCAM EX320 User Manual

7 – Introduction to thermographic inspections of electrical installations
7.3
7.3.1
A thermal image may show high temperature variations:
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Figure 7.2 Temperature variations in a fusebox
In the images above, the fuse to the right has a maximum temperature of +61°C
(+142°F), whereas the one to the left is maximum +32°C (+90°F) and the one in the
middle somewhere in between. The three images are different inasmuch as the tem-
perature scale enhances only one fuse in each image. However, it is the same image
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and all the information about all three fuses is there. It is only a matter of setting the
temperature scale values.
7.3.2
Some cameras today can automatically find the highest temperature in the image.
The image below shows how it looks to the operator.
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Figure 7.3 An infrared image of a fusebox where the maximum temperature is displayed
The maximum temperature in the area is +62.2°C (+144.0°F). The spot meter shows
the exact location of the hot spot. The image can easily be stored in the camera
memory.
The correct temperature measurement depends, however, not only on the function
of the evaluation software or the camera. It may happen that the actual fault is, for
example, a connection, which is hidden from the camera in the position it happens
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Measurement technique for thermographic inspection
of electrical installations

How to correctly set the equipment

Temperature measurement

Publ. No. 1558146 Rev. a156 – ENGLISH (EN) – February 28, 2006