3-7
Rotate – UP button will let the user cycle through the screen
rotation. This feature offers valuable options to the user in en-
abling the scope to be used for various purposes. Example:
When worn on a headgear/helmet for the left eye (vs more stan-
dard right eye approach) the Rotate feature will enable the user
to rotate the icons 180 degrees to achieve the proper icon po-
sitioning.
NOTE
We highly recommend that you use this feature in combina-
tion with the VPT (Variable Pivot Technology) Figure 3.14. to
achieve optimal results [3.2.4 and 3.2.5].
Calibrate/NUC – DOWN button will let you Calibrate/NUC the
system. Calibrating or NUCing a thermal system is needed
when a user detects degradation of the image (image blurring or
a burn in effect). This is a normal part of a thermal sensor func-
tionality and is caused by a charge accumulation on the detector
array. Most often this will occur when the device is used in an
environment with large temperature variations (example: mov-
ing from a warm house to a cold outdoor environment). Calibra-
tion is needed less when used outdoors at night where tempera-
ture variations are less frequent.
To properly Calibrate/NUC the system, user must cover the ob-
jective lens either with a lens cap or any other object of uniform
temperature (most often even a user’s hand will do). Only when
the lens is covered the Calibrate feature may be activated. In
the event the Calibrate feature is activated and the lens is not
covered - the device may experience even a worse degrada-
tion as heat sources viewed by the device during calibration are
burn-in to the sensor.
NOTE
The burn-in is temporary and causes no permanent damage
to the unit.
There are two ways to access Calibrate/NUC function. First is
through the 3rd Menu Set as explained above. Second is the
Quick Calibration Option – Press both the UP and DOWN keys
simultaneously and unit will Calibrate/NUC.
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