AHRS500CA Series User’s Manual
Page 18
Doc# 7430-0050-03 Rev. A
DO NOT try to stick a magnet to the A HRS500CA. We have removed as
much magnetic material as possible from the unit, but we could not make
the unit completely non-magnetic. You can permanently magnetize ("perm
up") components in the AHRS500CA if you expose the unit to a large
magnetic field. You can use a demagnetizer (tape eraser) to demagnetize
the AHRS500CA if it gets “permed.” Follow the instructions for your
demagnetizer.
The AHRS500CA case is weatherproof, but you should always try and
protect it from moisture and dust.
þ
EXAMPLE
4.2
AHRS500CA Start Up Procedure
As an example, look at how the AHRS500CA might be used on an airplane.
Assume AHRS500CA is mounted on a small twin-prop plane and will be
used to record the plane's attitude during flight. Flights will be 2 – 6 hours
long. The AHRS500CA is mounted near the CG of the plane, and is
connected to a laptop serial port during flight.
1. Turn on power to the AHRS500CA and let it warm up 5 – 10
minutes. Power can be on to all electronics, but the engines
should be off. Monitor the initialization BITs 10 and 9 of the
BIT word, and make sure they are at the 00 position signaling
that the unit is in full accuracy mode.
2. Start the engines.
3. Perform hard iron and soft iron calibration routines (Appendix
C).
4. Start data collection.
5. Proceed with flight.
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