Jenoptik VARIOSCAN high resolution Series Manual page 32

Operation
Atmospheric temperature (Type 3022 only)
The temperature of the atmosphere between camera and measured
object. In temperature calculation, the radiation fraction of atmosphere
is taken into account. This fraction affects measured object temperature
only if the object distance is large and the absorption factor of
atmosphere has been set to a value other than zero.
Transmission (Type 3022 only)
The transmission of athmosphere is significant only at large object
distances. If you are uncertain about the appropriate setting, use 1 or
consult a book on thermography.
Spot temperature measurement °C
This key activates/deactivates the temperature measurement for
defined spots in the image. A double click starts the Spot editor:
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Selection and generation of a measurement spot; 9 spots
may maximally be defined.
In Spot No. 9, renewed pressure of the upper key will bring
up a window allowing the temperature display window to be
moved across the image.
This window can be deactivated by pressing the lower No –
key.
Analogously, the window can be activated by pressing the
lower key in Spot No. 1.
A double click on the lower key provides an option for
deleting all spots.
In the Spot editor, the keys have the
following functions:
↑↓
Moves the spot up/down
←
Moves the spot to the left
→
Moves the spot to the right
Confirms spot settings