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Honeywell KAP 140 Installation Manual Page 23

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Altitude Hold (ALT) Mode
The Altitude Hold (ALT) mode maintains the pressure altitude acquired upon selection of
altitude hold.
The ALT button toggles between altitude hold and vertical speed modes.
To operate in the ALT mode (with autopilot currently in the Vertical Speed mode):
1. ALT button - Press. Note ALT is annunciated and autopilot maneuvers to maintain
pressure altitude acquired at button selection.
2. UP or DN button - Select to change altitude. Incremented button strokes will move the
reference altitude by 20 feet per press, or if held continuously will command a 500 ft/min
altitude change, acquiring a new reference altitude upon button release.
Note: Incremented altitude changes should be limited to 500 ft. of change.
Altitude Alerting and Preselect
The Altitude Preselect function allows capturing of a desired altitude and transferring into
Altitude Hold (ALT). Manual input of desired altitude is accomplished through the rotary
knobs on the faceplate of the KAP 140.
The Altitude Alerting function will visually and aurally announce approaching, acquiring
and deviation from a selected altitude.
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