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will not move faster than 4 m/s (8 kts) per second. It should be noted that when set to 4
the vario indicator will move four times faster than when set to 1.
Summary:
The Smart Vario should not be used in isolation but in conjunction with the setting of the
time constant filter. When the Smart Vario is activated the time constant filter may need
further adjustment to provide optimum indications.
6.2 Altimeter
The altimeter of the LX8000 is temperature compensated from -20ºC up to + 60ºC. The
altimeter is calibrated from 0 to 9000 m, but indication goes up to 16000 m.
6.2.1 IGC Barograph Recalibration Procedure
The LX8000 has an additional pressure sensor for altitude recording. To comply with IGC
procedures this sensor has no external pneumatic connection. To carry out the barograph
calibration procedure it is necessary to remove the instrument from the glider and place it in
a vacuum chamber. The procedure is as follows:
Switch the instrument ON and wait some minutes (straight line on the barogram
beginning).
Set the recording interval to 1 second (see Chapter 5.1.2).
Place it in the chamber and carry out a short climb to about 100 m (to start the flight
recorder).
Bring the chamber pressure to exactly 1013.2 hPa.
Decrease the pressure by 1000 m and hold for about 30 seconds.
Continue the procedure to 6000 m.
Increase the pressure in 1000 m steps back to 1013.2 hPa.
After reaching ground wait about 3 minutes and then switch the instrument off.
Leave the instrument off for at least 5 minutes.
Download the last flight and print the barogram using the LXe PC program.
Restore the flight recorder settings.
The barogram will be the last flight in the logbook.
6.3 Speed Command
Speed command flying based on the MacCready theory is a very useful tool to optimise
cross-country speed. There are many visual indicators (see Chapter 5.1.12.2). When the
instrument changes to speed command mode the audio will change and become a director
informing the pilot whether he is flying too fast or too slow. In order to reduce confusion
between vario and speed command audio some special features were developed:
Continuous audio signal in + possible (other kinds of signals can be chosen, see
setup).
No audio at correct speed (dead band).
FILTER
0.5 to 5
Smart Vario
FILTER
1 to 8 or OFF
RAW
VARIO
FILTERED
VARIO
VARIO
INDICATOR
77


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