FLIR GF3 Series User Manual

Achieving a good image14
14.8 Enabling or disabling inverted color palette
14.8.1 Procedure
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 Image tab.
4. Move the joystick up/down to go to select Invert palette.
5. Push the joystick to enable/disable the setting.
6. Push the
button to leave the setup mode.
14.9 Changing object parameters
14.9.1 General
For accurate measurements, you must set the object parameters. You can do this locally
or globally. This procedure describes how to change the object parameters globally.
14.9.2 Types of parameters
The camera can use these object parameters:
• Emissivity, i.e., how much radiation an object emits, compared to the radiation of a the-
oretical reference object of the same temperature (called a “blackbody”). The opposite
of emissivity is reflectivity. The emissivity determines how much of the radiation origi-
nates from the object as opposed to being reflected by it.
• Reflected apparent temperature, which is used when compensating for the radiation
from the surroundings reflected by the object into the camera. This property of the ob-
ject is called reflectivity.
• Object distance, i.e., the distance between the camera and the object of interest.
• Atmospheric temperature, i.e., the temperature of the air between the camera and the
object of interest.
• Relative humidity, i.e., the relative humidity of the air between the camera and the ob-
ject of interest.
• External optics temperature, i.e., the temperature of any protective windows etc. that
are set up between the camera and the object of interest. If no protective window or
protective shield is used, this value is irrelevant.
• 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.
Note For furnace and other high-temperature applications, mount the heatshield on
the camera. You must also enter the correct external optics transmission value of the
heatshield into the camera. The external optics transmission value is printed on a label
on the inside of the heatshield. You enter the external optics transmission value in the
object parameters dialog on the Edit tab.
When you remove the heatshield you must reset the external optics transmission to 1.0.
14.9.3 Recommended values
If you are unsure about the values, the following values are recommended:
Emissivity 0.95
Distance 1.0 m (3.3 ft.)
#T559157; r. AH/45951/45951; en-US
41

FLIR GF3 Series Specifications

General

Brand	FLIR
Model	GF3 Series
Category	Thermal cameras
Language	English