BendixKing KPA 900 System RDR-2000 - Manual (Page 40)

BENDIX/KING® KPA 900
Page 3-20
Revision 2
©Honeywell International Inc. Do not print without express permission of Honeywell.
Dec/2007
Figure 3-15 – ART Stab Calibration Form with Default Values Shown
3.6.8.1 ANALOG GAINS
The Analog Gyro Reference Gain, Pitch Gain, and Roll Gain represent the scale factor
applied to the multiplying ADC in the ART. The ART then translates the gyro voltage to
the calibrated level for the angle given by the gyro. When the gyro voltage is the same as
the calibration voltage, the ART scales that voltage to the equivalent angle. If the gain to
the ADC is increased, the ART scales the voltage to a lower value and interprets the angle
as a smaller angle.
Make sure to observe how the direction of the desired change affects the operation.
Reverse the direction of the change to compensate for the direction not calibrated. Make
changes as necessary and record all adjustments for future reference. If the calibration is
unsuccessful, you can restore the saved file or do a complete calibration. Refer to the ART
installation manual for instructions on how to do a complete calibration.
3.6.8.2 ANALOG OFFSETS
The Analog Gyro Pitch Offset and Roll Offset show the deviation from zero degrees given
by an analog gyro when the aircraft is in level flight. These values are typically close to
zero with a gyro that is calibrated and functions properly.
3.6.8.3 ANALOG NULLS
The Analog Gyro Pitch Null and Roll Null show the deviation from zero volts when the
aircraft is in level flight. These values are typically zero with a gyro that is calibrated and
functions properly. The air-driven panel-mount gyros sometimes have a non-zero value in
this field.