Strain Gauge; Cal (Shifted Function) / Af Switch - FLIR SeaFLIR II Series Operator's Manual

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Issued to: AgustaWestland
Radar Bearing – Radar Bearing Handoff (RBH) Mode must be
configured and selected in the Hardware config Menu. Radar Bearing
Handoff Mode will activate when selected with the POS / H HOLD
Switch. The Radar Bearing Mode will not display if it has not been
configured. Refer to paragraph 3.2.5.2 to select and configure the RBH
Mode.
Rate Mode – Default operating mode.
3.1.21

Strain Gauge

The Strain Gauge during normal operation is used to manually control
the orientation of the SGA and its slew rates.
The Strain Gauge can also used in conjunction with the MENU, ADJ and
EXIT Switches to select and implement functions on the pull down
menus. The Strain Gauge is used to move among fields in Date and
time edit, among character positions in Agency name edit, or among
menu items in a menu.
3.1.22

CAL (shifted function) / AF Switch

CAL (shifted function) – This is used to perform a Non-Uniformity
Correction (NUC) on the IR sensor. Pressing the SHIFT Switch and then
the CAL/AF Switch will cause the system to display the message NUC in
progress under POS Mode and the SGA will rotate to the stow position.
NUC in progress (Figure 3-4) will stay displayed until the calibration
process is complete and the SGA returns to the starting position and the
system returns to the Rate mode (approximately 35 sec.).
The Non-Uniformity Correction (NUC) is only performed on the IR
sensor. If the 1.8X option is installed the NUC will be performed first on
the selected optic configuration (1.8X engaged or not engaged), then
non-active configuration. When the NUC is complete the system will
return to the starting IR optic configuration.
The IR camera uses a 320 x 240 pixel format FPA. Each of the 76,800
pixels has a slightly different response curve to incident radiation. The
IR camera automatically applies a correction factor to each pixel before
displaying the image in order to normalize the pixel-to-pixel differences
and display a uniform image.
correction values, which have been optimized for room temperature
scenes (~20°C), stored permanently in IR camera memory for each of
the pixels. For much colder or warmer scene temperatures, the non-
uniformity correction (NUC) function will calculate a new set of correction
values that will eliminate spatial noise.
CM Ref:4049
Valid on Day of Issue only.
Document will not be updated
The IR camera has offset and gain
25
Uncontrolled : 4256
Retrieval Date:07-Dec-10
Requested by Bower, Richard