Recommended Values; Procedure - FLIR T460 User Manual

16 Working with measurement tools
• 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
Atmospheric temperature
Relative humidity
Reflected temperature
Emissivity

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
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)
#T559879; r. AH/23788/24627; en-US
1.0 m (3.3')
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+20°C (+69°F)
0.95
(Measurement parameters).
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