Change The Color Palette; Color Alarms And Isotherms; Set Up A Color Alarm; Measurement Parameters - DATATEC FLIR E5-XT User Manual

8 Measuring temperatures

8.5.1 Change the color palette

On the main toolbar, select Color. This displays a toolbar where you can select a color
palette.

8.6 Color alarms and isotherms

By using color alarms (isotherms), anomalies can easily be discovered in an infrared im-
age. The isotherm command applies a contrasting color to all pixels with a temperature
above or below the specified temperature level.
Above alarm: Highlights all pixels with a tempera-
ture above the specified temperature level.

8.6.1 Set up a color alarm

On the main toolbar, select Color. This displays a toolbar where you can select the Above
alarm or Below alarm.
The threshold temperature is displayed in the upper right corner of the live image.
To change the threshold temperature, push the navigation pad up/down. To lock/unlock
the setting, tap the threshold temperature button. The button background is black when
the setting is locked and white when unlocked.

8.7 Measurement parameters

For accurate temperature measurements, it is important to use appropriate measure-
ment parameters:
• Emissivity: The emissivity determines how much of the radiation originates from the
object as opposed to being reflected by it.
• Reflected temperature: This parameter is used to compensate for the radiation from
the surroundings reflected by the object into the camera.
• Relative humidity: The relative humidity of the air between the camera and the object
of interest.
• Atmospheric temperature: The temperature of the air between the camera and the ob-
ject of interest.
• Distance: The distance between the camera and the object of interest.
Note During normal operation there is typically no need to change the default meas-
urement parameters, see section 8.7.2 Recommended values, page 23.

8.7.1 Setting measurement parameters

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
Relative humidity, Atmospheric temperature, and Distance are relevant for longer
distances.
#T810624; r. AF/93316/93316; en-US
Below alarm: Highlights all pixels with a tempera-
ture below the specified temperature level.
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