FLIR GFx320, User Manual

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Working with measurement tools 20
• External optics transmission , i.e., the optical transmission of any protective windows,
etc. that are set up between the camera and the object of interest.
20.4.3 Recommended values
If you are unsure about the values, the following values are recommended:
Emissivity 0.95
Distance 1.0 m (3.3 ft.)
Reflected appa-
rent temperature +20°C (+69°F)
Relative humidity 50%
Atmospheric
temperature
+20°C (+69°F)
20.4.4 Procedure
Follow this procedure to change the object parameters globally:
1. Turn the mode wheel to or .
2. Push the button to display a menu.
3. Move the joystick left/right to go to the Edit tab.
4. Move the joystick up/down to select Object parameters .
5. Push the joystick to display a dialog box.
6. Move the joystick up/down to select the parameter you want to change, then push
the joystick.
7. Move the joystick up/down to change the value, then push the joystick.
8. Push the button to confirm and leave the setup mode.
Note
• Of the seven parameters above, emissivity and reflected apparent temperature are
the two most important to set correctly in the camera.
• To change object parameters locally , first select a measurement tool in the toolbox,
then select Use local parameters . Change the local parameters by selecting Edit local
parameters , then edit them in the same way as for global object parameters.
20.4.5 Related topics
• For in-depth information about parameters, and how to correctly set emissivity and re-
flected apparent temperature, see 41 Thermographic measurement techniques .
#T810169; r. AN/42241/42268; en-US 65