Sandia Aerospace SAE 5-35 Installation Manual User Manual

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Section 1 General Description

1.1 INTRODUCTION

This manual describes the installation of the SANDIA aerospace SAE5-35 Altitude Data System. It
is intended for use by FAA certified repair stations to install the SAE5-35 Altitude Data System and
includes both the mechanical and electrical installation information for the SAE5-35. Calibration and
checkout procedures are included. The installer should insure that all functions are operating accord-
ing to their intended purpose in their particular installation.

1.1.1 Product Description

The SAE5-35 is a solid state -1000 to 35,000 foot altitude data system that converts pressure altitude
into a digital output as set forth in the International Standard for SSR Pressure Altitude Transmis-
sion. The data output of the SAE5-35 is referenced to 29.92 inch HG (1013 Millibars). The SAE5-
35 has been designed to provide altitude data to GPS and Terrain Awareness Systems in addition to
Mode C Transponders. The SAE5-35 outputs Gillham Grey Code to the transponder and two inde-
pendent RS232 digital outputs that can be used by GPS or other systems requiring this format.
Additionally, the SAE5-35 includes SANDIA aerospace’s exclusive Altitude In-flight Monitoring
(AIM) feature. With the addition of an optional panel mounted switch and annunciator the AIM
mode will monitor and advise the pilot if the aircraft deviates from a selected altitude.

1.2 TECHNICAL CHARACTERISTICS

1.2.1 Physical Characteristics

Width:

4.87” (5.11” with mounting tray)

Height:

1.06” (1.57” with mounting tray)

Depth:

4.74” (4.80” with mounting tray)

Weight:

0.7 lbs. (.86 lbs. with mounting tray)

1.2.2 Operational Characteristics

Operating Temp.

-20

C to + 55

Altitude:

35,000 feet

Voltage:

11 - 32 Vdc

Current

1.0 amps maximum with heater on
<100 mA quiescent

Accuracy:

+/- 50 feet Typical

Resolution:

Grey Code 100’
RS232

10’

Burst Pressure

90 in Hg

Maximum Rate of Altitude Change:

12,000 Feet/Minute