BendixKing KXP 756 - Manual (Page 44)

43
KNI 415/416
The KNI 415 and KNI 416 Radar
Altimeter Indicators are discussed
below.
Altitude Scale
The KNI 415 scale gives
accurate altitude indications from -20
to +2000 feet. From - 20 to 500 feet
each mark on the scale represents 10
feet. From 500 to 2000 feet, each
mark represents 100 feet.
The KNI 416 scale gives
accurate altitude indications from -10
to +2000 feet. From -10 to 200 feet
each mark represents 5 feet, from
200 to 500 feet each mark represents
20 feet, and from 500 to 2000 feet
each mark represents 100 feet.
Indicator Needle
The AGL altitude in feet is
displayed beneath this needle.
Needle will be clockwise behind mask
when above 2000 feet.
Flag
Indicates invalid altitude
information is being displayed or self
test button is depressed.
Self Test Button
This button is used to test the
Radar Altimeter R/T and indicator.
When the button is depressed, the
flag will come into view and 50 +/-5
feet will be displayed.
DH Knob
This knob controls the DH
(Decision Height) bug. By turning it
clockwise, the DH bug will increase in
altitude; counterclockwise, the bug
will decrease in altitude.
DH Bug
Indicates altitude during an
approach at which the DH lamp will
light.
DH Lamp
This lamp lights when the
Decision Height is reached. The lamp
can be turned off by pushing the lamp
in. The lamp can be turned off by
pushing the lamp in. The lamp can be
turned on again, when below the
decision height, by depressing the
lamp a second time.
Once turned off, the DH lamp will
be automatically armed upon climb
out as the aircraft passes through the
DH altitude. Pressing the self-test
button will also turn on the DH lamp if
the DH bug is set above 50 feet.
Normal Operation
Preflight
A. Turn on primary aircraft power.
B. Adjust the DH knob on the KNI
415/416 Radar Altimeter Indicator
to set the DH but to 25 feet.
C. Depress the TEST button. The
indicated altitude should be 50, ±
5 feet and the flag should come
into view. The DH lamp should be
out.
D. With the TEST button depressed,
slowly increase the DH bug until
the DH lamp lights. The bug should
be 50, ± 5 feet. The lamp should
be lit at all altitudes above 50 feet.
E. Release the TEST switch. The
warning flag should move out of
view and the indicated altitude
should be 0 feet, nominal.