SYSTEM INSTALLATION MANUAL
89000016
aircraft. The pitot-static test set must be able to drive the altitude down to sea level, and
above the service ceiling of the aircraft.
(b)
No test set is required. The calibration procedure displays all the information you need
on the screen of the KGX control panel.
(3)
Calibration Procedure
(a)
There are two adjustment points on the altitude encoder, a low altitude adjustment point,
and a high altitude adjustment point. The low altitude point adjusts the correspondence
at sea level, and the high altitude point adjusts the correspondence at the altitude limit
of the encoder. Since the altitude limit of the encoder is likely to be higher than the
service ceiling of the aircraft, it is sufficient to set the upper adjustment at the service
ceiling of the aircraft.
CAUTION:
DO NOT EXCEED THE ALTITUDE OR RATE OF CLIMB LIMITS OF
THE PITOT-STATIC INSTRUMENTS OF THE AIRCRAFT. THE KGX
CONTROL PANEL ALTITUDE ENCODER IS A SOLID STATE DEVICE
AND WILL NOT BE AFFECTED BY EXCESS ALTITUDE OR RATE OF
CLIMB AND DESCENT, BUT THE MECHANICAL INSTRUMENTS IN THE
AIRCRAFT CAN EASILY BE DAMAGED BY BEING DRIVEN BEYOND
THEIR INTENDED RANGE.
1
Set the primary altimeter subscale setting to 29.92 in-Hg (1013.2 hPa).
2
Connect the pitot-static test set to the aircraft.
3
You can enter the altitude encoder calibration setup either after following the steps
from above in order or you can enter directly by holding the FN button down on
the KGX control panel on power up to enter setup mode, and skipping over the
configuration modes until reaching the calibrate altitude encoder section. When you
are in the calibrate altitude encoder setup mode the display shows the information
shown in Figure 3077.
4
Rotate the CODE knob either clockwise or counterclockwise to display either YES
or NO and select the correct option. Once selected, press the ENT key to confirm
your selection and move to the next configuration item in the configuration mode.
If NO is selected then the next configuration item in the configuration mode will
be displayed. If YES is selected then options for calibrating the altitude encoder
are as shown in Figure 3078.
5
On selecting YES the low altitude set point will now be active, and an altitude will be
displayed as shown in Figure 3078.
6
On the static test set, drive the altitude to 0 feet.
7
Read the primary altimeter value; rotate the CODE knob either clockwise or
counterclockwise until the altitude displayed on the KGX control panel matches
the aircraft primary altimeter.
8
Press ENT and the display will move to the mid altitude set point and an altitude will
be displayed as shown in Figure 3079. On the static test set, drive the altitude to
the middle range ceiling of the aircraft.
9
Read the primary altimeter value; rotate the CODE knob either clockwise or
counterclockwise until the altitude displayed on the KGX control panel matches the
aircraft primary altimeter. Press ENT and the display will move to the high altitude
set point and an altitude will be displayed as shown in Figure 3080. On the static
test set, drive the altitude to the service ceiling of the aircraft.
EFFECTIVITY
ALL
Page 3057
22 Dec 2016
© Honeywell International Inc. Do not copy without express permission of Honeywell.