Sandia Aerospace STX 165 User Guide - Manual (Page 6)

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Altitude/Temperature Displays
Altitude and temperature information is displayed in the lower left display quadrant. The operator can cycle
through the different information by turning the Select knob (the large right side knob).
Pressure Altitude The STX 165 has a built-in TSO’d altitude encoder. The output of the encoder is pressure
altitude and is displayed as PALT. It can be displayed in either feet or meters depending on
the user set up configuration
Density Altitude If an optional SANDIA aerospace OAT probe is installed with the STX 165 it will display
Density Altitude, DALT. DALT is based on the current OAT and Pressure Altitude. DALT
will be displayed in either feet or meters depending on the user set up configuration
OAT If an optional SANDIA aerospace STP 78 OAT probe is installed with the STX 165, it will
display the current Outside Air Temperature in either degrees Fahrenheit or Celsius depend-
ing on the User Set Up selection.
Icing Alert If an optional SANDIA aerospace STP 78 OAT probe is installed with the STX 165, it will
display an Icing Alert in the upper right hand corner of the display when the temperature
reaches a user defined temperature. The Snow Flake symbol will blink for ten seconds once
the Icing Alert temperature is reached, then remain on solid until the temperature goes above
the preset temperature.
Pressure Altitude Density Altitude Outside Air Temp Icing Alert
Timers
The STX 165 has three timer functions that are displayed in the lower right hand corner of the display. These
are Elapsed Flight Time (EFT), an up counter (CNT UP) and a down timer (CNT DOWN). To select a timer
rotate the Data knob either clockwise or counter clockwise.
Elapsed Flight Time When the STX 165 is first turned on the timer function will be initialized on the Elapsed
Flight Time (EFT) page. The EFT will begin counting at system turn on or at a predeter-
mined altitude set by the pilot in the User Set Up mode. (Note that this is the differential
altitude from when the STX 165 was first turned on.). The EFT can only be reset by
turning the unit off.