Calibration; Av-Mag Yaw Angle - uAvionix AV-30-E Installation Manual

11.3.12

Calibration

Calibration is the process of detecting and compensating for minor
magnetic field and ferrous material interferences coming from the
aircraft. If the AV-Mag is relocated or is removed and reinstalled, a re-
calibration must be performed. AV-Mag orientation, roll and pitch
installation angles, and earth magnetic field values must be up-to-date at
the time of calibration.
The calibration menu appears as AVMAG CAL in the AV-30 installation
menu. The calibration process requires the aircraft with AV-30 and AV-
Mag installed to be oriented to each of 12 headings, with a 10 second
measurement time at each orientation. Any interfering systems that must
be on during flight (e.g., navigation lights) must also be on during
calibration.
Calibration is discussed in further detail in Section 13.2.4.
11.3.13

AV-Mag Yaw Angle

Upon completion of calibration, the displayed heading at each of the 12
orientations should be checked and recorded in Table 13-4. If every
heading is off by the same value, then the yaw angle of the installed AV-
Mag may to be imperfectly aligned with the aircraft line of flight or the
alignment of the aircraft to magnetic north may be imperfect.
UAV-1004234-001, AV-30-E Installation Manual
Rev H
67