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FLIR G Series User Manual

FLIR G Series
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Thermal imaging basics
7
If the selected temperature range is too low, the image will be oversaturated, as objects
with higher temperatures emit more thermal radiation than colder objects. If you select a
temperature range that is too high, the thermal image will be “underexposed”.
A general guideline for gas detection is to start with the lowest camera temperature
range, but change if the image becomes oversaturated.
For accurate temperature measurements, you must select a temperature range that
matches the expected temperature of the object you are inspecting.
7.2.1 Change the temperature range
To change the temperature range, do one of the following:
Push the Temperature range button and then select a temperature range by using the
joystick or touching the screen. See also section 6.9 Temperature range.
On the Settings menu, select Camera temperature range. This displays a menu where
you can select the temperature range.
7.3 Thermal image adjustment
Thermal image adjustment, or thermal tuning, means adjusting the temperature scale of
a thermal image, in order to maximize the brightness and contrast in the image.
In automatic mode, the camera continuously adjusts the image for the best presentation.
The camera selects the coldest and warmest temperatures in the image as the lower
and upper limits of the temperature scale. The colors are then distributed over that tem-
perature interval (histogram color distribution).
In manual mode, you can adjust the temperature scale to values close to the temperature
of a specific object in the image. The colors are distributed evenly from the lowest to the
highest temperature (linear color distribution).
Manual mode lets you center on the temperatures around the background of the gas,
which can make the gas appear more clearly.
When measuring temperatures, manual mode will make it possible to detect anomalies
and smaller temperature differences in the part of the image of interest.
Note Manual image adjustment is not possible in High Sensitivity Mode (HSM) mode.
Figure 7.3 A thermal image of a power line in automatic mode (left) and in manual mode (right). To make
it easier to analyze the temperature variations in the isolator, the temperature scale in the right image has
been changed to values close to the temperature of the isolator.
7.3.1 Manual mode
To enter manual adjustment mode, select Temperature scale > Manual on the main
toolbar.
In preview/edit mode, manual adjustment mode is active.
#T810605; r. AD/92464/92464; en-US
34

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FLIR G Series Specifications

General IconGeneral
BrandFLIR
ModelG Series
CategoryThermal cameras
LanguageEnglish

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