FLIR T6 series User Manual

Working with measurement tools16
• 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.
• Reflected temperature, which is used when compensating for the radiation from the
surroundings reflected by the object into the camera. This property of the object is
called reflectivity.
• Emissivity, i.e., how much radiation an object emits, compared with the radiation of a
theoretical reference object at the same temperature (called a “blackbody”). The op-
posite of emissivity is reflectivity. The emissivity determines how much of the radiation
originates from the object as opposed to being reflected by it.
Note
There is an Emissivity mode setting, which you can use to enter the emissivity by material instead
of by value. Select
(Settings) > Device settings > Set up camera > Emissivity mode > Select
from materials table.
16.5.3 Recommended values
If you are unsure about the values, the following are recommended:
Object distance 1.0 m (3.3′)
Atmospheric temperature +20°C (+69°F)
Relative humidity 50%
Reflected temperature +20°C (+69°F)
Emissivity 0.95
16.5.4 Procedure
You can set the object parameters globally. You can also change the Emissivity, Re-
flected temperature, and Object distance parameters locally for a measurement tool.
Note
Of the object parameters, Emissivity and Reflected temperature are the two most important to set cor-
rectly in the camera.
16.5.4.1 Setting global parameters
Follow this procedure:
1. Push the joystick to display the menu system.
2. Use the joystick to go to
(Measurement parameters).
3. Push the joystick to display a submenu. Use the joystick to select one or more of the
global object parameters:
•
(External IR window compensation)
•
(Object distance)
•
(Atmospheric temperature)
•
(Relative humidity)
•
(Reflected temperature)
•
(Emissivity)
4. Push the joystick to display a dialog box.
#T559880; r.15724/15724; en-US
43

FLIR T6 series Specifications

General

Brand	FLIR
Model	T6 series
Category	Thermal cameras
Language	English