Honeywell Bendix/King KFD 840 Primary Flight Display
Altitude Area KFD 840 PG PN 7450-0840-01
5-2 Rev C May 28, 2010
©
Honeywell International Inc. Do not copy without express permission of Honeywell
ALTITUDE TAPE
The altitude tape, used in conjunction with the
altitude digital readout, is a semi-transparent
moving scale display with a fixed pointer that
has a range of -2000 to +34,000 feet. The scale
shows ±550 feet from the center of the tape.
There are tick marks for every 100 feet of
altitude, except for increments coincident with a
chevron. The scale markings on the tape are
labeled in 500-foot increments.
A chevron is displayed at 500-foot and 1000-
foot intervals to emphasize the incrementations.
The 1000-foot marks show double chevrons,
while the 500-foot marks show single chevrons.
ALTITUDE ROLLING DIGITS
The altitude rolling digits are displayed in
conjunction with the altitude tape to depict the
current barometric altitude. The actual altitude
value is displayed in the readout window. The
range of the digital readout is between -2000
and +34,000 feet, with a resolution of 20 feet. A
minimum of three digits are displayed with
leading zeros, when necessary.
The altitude digital readout rolls down for increasing barometric
altitude and up for decreasing barometric altitude. For negative
altitudes, a leading minus sign is displayed.
