Sandia Aerospace SAE5-35 Pilot’s Guide - Manual

SAE5-35 Pilot’s Guide
The SAE5-35 is an Altitude Data System that provides Grey code altitude infor-
mation to transponders for Mode C operation. It also provides altitude data to
avionics equipment accepting RS-232 data format. These functions are controlled
by the equipment to which they are interfaced. Refer to the appropriate operators
handbook for proper operating procedures.
The SAE5-35 also has
SANDIA aerospace’s exclusive Altitude In-flight Moni-
toring (AIM) function that informs the pilot if the aircraft deviates from a se-
lected altitude. This feature is available in all SAE5-35 systems, but requires the
addition of the
SANDIA aerospace annunciator/pushbutton assembly, P/N
305217-00 or a separate pushbutton switch labeled SET and two annunciators
labeled ALT and SET.
To operate the AIM function, use the following procedure.
1. When you have arrived at your desired cruise altitude, press the AIM ‘SET’
pushbutton. The aircraft’s current altitude is stored in memory when the
pushbutton is released. Both annunciators should illuminate for approxi-
mately one second when the button is released to test the annunciator bulbs
Do not use the AIM function if both bulbs do not briefly illuminate. After
one second the ‘ALT’ annunciator will extinguish and ‘SET’ annunciator
will stay illuminated, telling you that an altitude is set in the SAE5-35’s
memory.
2. Should the aircraft deviate 100’ or more from your selected altitude, the ‘ALT’
annunciator will illuminate. Refer to your primary altimeter to determine if
you are high or low and correct to the proper altitude. Correcting the aircraft’s
altitude will extinguish the ‘ALT’ annunciator, informing the pilot that he is
within 100’ of the currently selected altitude.
3. If the aircraft deviates 200 feet or more, the ‘ALT’ annunciator will flash at a
rate of approximately twice per second. Again, refer to the aircraft’s primary
altimeter and correct to the proper altitude.
4. If you change altitudes or barometric setting in your altimeter and readjust
your aircraft’s altitude, the AIM function will need to be reset. To reset the
AIM, simply press the pushbutton once. This will turn the AIM function
off. Then press it a second time to ‘SET’ the new altitude.
4. To turn off the AIM function, simply press the ‘SET’ pushbutton a second
time. The ‘SET’ anunciator will extinguish.
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