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PREVIEW OF OPERATION
To give you an idea of how easy the KLN 90B is to operate, the following
operational preview is presented. This operational preview assumes the
KLN 90B has been properly installed, the unit was previously operational
in the same general geographical location, and that no peripheral equip-
ment interfaced with the KLN 90B (such as external HSIs, CDIs, autopi-
lots, RMIs, fuel flow systems, moving map displays, etc.) is to be used at
this time. If you are using this operational preview in flight, do so only in
good VFR conditions and only with an alternate means of navigation avail-
able to cross-check position.
1. Push the power/brightness knob located in the upper right corner of the
unit to the “in” position.
2. After a few seconds of warm up, the screen will show a Turn-On page
with the words SELF TEST IN PROGRESS at the bottom of the page.
Rotate the power/brightness knob to select the desired screen bright-
ness. After a few seconds the Turn-On page will automatically be
replaced with the Self Test page. (Note: If the KLN 90B is being used in
the take-home mode, a Take-Home Warning page is displayed before
the Self Test page and must be acknowledged by pressing E). The
Self Test page is recognizable because it shows the date and time on
the right side. The bottom left side of the Self Test page must display
ANNUN ON to indicate that the KLN 90B has passed an internal self
test.
In most KLN 90B installations the first two characters of the altimeter set-
ting BARO field will be highlighted in inverse video (dark characters on a
light background) on the right side of the screen. This area of inverse
video is called the cursor. Use the right inner knob to select the correct
first two characters of the altimeter setting. Next, turn the right outer
knob one step clockwise to position the cursor over the third character of
the altimeter setting. Use the right inner knob to select the correct
number. Once again turn the right outer knob one step clockwise to
position the cursor over the last character of the altimeter setting. Use
the right inner knob to complete entering the correct altimeter setting.
Turn the right outer knob clockwise to position the cursor over the word
APPROVE? if the cursor is not there already. Press E to approve the
Self Test page.
(Note: If the KLN 90B is installed for VFR only operation,
a VFR only warning page is displayed after the self test page has been
approved. This warning page must be acknowledged by pressing
E
. If
the KLN 90B has an external GPS CRS switch and the switch is in the
OBS position, then an OBS warning page will be presented after the self
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