Operation Manual

7.1.3 Set Elevation and QNH
This setting is crucial for final glide calculation: therefore pay careful attention to it.
The instrument will offer elevation from the terrain database based on current latitude and
longitude. Elevation will mostly be within few meters from the current elevation. Use the
lower-right knob to fine-tune the elevation.
If the elevation is unknown and the QNH pressure is known you should NOT press button
QNH. Just keep turning the lower-right knob (PAGE selector) and observe the QNH value to
adjust it to proper value.
The QNH button should be pressed only when airfield elevation and QNH pressure are
given. This might happened on some competitions.
In all other cases elevation should always match QNH pressure.
The profile selection and Elevation dialogues are not shown if the LX8000 is
switched off and on during flying.
7.1.4 Pre-flight Check
After elevation setup the LX8000 will switch to airport mode. It will take about 30 seconds
to draw the map screen for the first time. All way point files and databases are loaded at
that time and therefore instrument might react somewhat slowly.
It is recommended to check the MacCready, ballast and bugs settings to match the current
glider configuration. Press the MC/BAL button. The dialogue for MacCready, Ballast and
bugs will appear.
Use the lower-right knob to modify the MacCready setting. Refer to Chapter 5.5.5.2 for
more details.
It is also highly recommended to check the safety altitude setting. Refer to Chapter 5.1.1 to
find out how to define the safety altitude.