FLIR GF7 Series, Руководство пользователя

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Measuring temperatures 11
For accurate temperature measurements, you must change the Camera temperature
range setting to suit the expected temperature of the object you are inspecting.
Note For more information, see section 30 About calibration , page 118.
11.5.2 Procedure
Follow this procedure:
1. Push the navigation pad to display the menu system.
2. Select ( Settings ) and push the navigation pad. This displays the Settings menu.
3. Select Camera temperature range and push the navigation pad. This displays a dia-
log box.
4. Select the appropriate temperature range and push the navigation pad.
Note You can also assign the function Switch temperature range to one of the program-
mable buttons . For more information, see section 21.15 Assigning functions to the
programmable buttons , page 90.
11.6 Changing the color palettes
You can change the color palette that the camera uses to display different temperatures.
A different palette can make it easier to analyze an image. For more information, see
section 13
Color palettes , page 38.
To change the color palette, do the following:
1. Push the navigation pad to display the menu system.
2. Select ( Color ) and push the navigation pad. This displays a submenu.
3. Use the navigation pad to select a different palette.
4. Push the navigation pad to confirm and exit the menu mode.
11.7 Changing the measurement parameters
For accurate measurements, it is important to set the measurement parameters:
• Emissivity .
• Reflected temperature .
• Object distance .
• Atmospheric temperature .
• Relative humidity .
• External IR window compensation .
Emissivity is the most important measurement parameter to set correctly. If the Emissivity
is set to a low value, the Reflected temperature also becomes important. The parameters
Object distance , Atmospheric temperature , and Relative humidity are relevant for longer
distances. The External IR window compensation must be activated if a protective win-
dow or external lens is used.
You can set the measurement parameters globally. You can also change the Emissivity ,
Reflected temperature , and Object distance parameters locally for a measurement tool.
For more information, see section 18.5 Changing the measurement parameters , page 60.
11.8 Non-uniformity correction (NUC)
11.8.1 General
When the thermal camera displays Calibrating... it is performing what in thermography is
called a ”non-uniformity correction” (NUC). An NUC is an image correction carried out by
the camera software to compensate for different sensitivities of detector elements and
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