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4.4.2 Sector Display
The Sector Display indicates climb or sink rate by an
"increasing" sector. If the climb or sink rate exceeds +/-
5 m/s, the values from 5 m/s to 10 m/s are displayed in
a second stage which is indicated by the sector being
cleared. We recommend using the Sector Display in low
temperatures, because in low temperatures the LC-
display becomes slow and the Sector Display is better to
read.
The VSI of the ALPHAMFD works electronically and therefore works much faster,
crisper and more precise compared to conventional mechanical VSI instruments with
their inherent long time lag.
4.4.3 Variometer Acoustic
If the motor of the airplane is switched off and the unit is climbing an acoustic signal
will be transferred to the intercom. A stronger climbing corresponds to higher
frequency and faster beep intervals.
4.5 Flight Time, Take-Off Time and Date of Flight
The flight time is measured as soon as the speed exceeds 50 km/h IAS. This moment
is also registered as take-off time and can later be called up in the MEMO-Mode. The
flight time is stopped as soon as the ALPHAMFD registers speeds of less than 50
km/h IAS.
WARNING! The ALPHA
ALPHAALPHA
ALPHAMFD cannot be switched off as long as it registers
an air speed of faster than 50 km/h. This prevents the pilot from
inadvertently switching off the instrument during flight.
4.6 Temperature and Voltmeter
By pressing the >FUNC/SET< key twice (with interval inbetween), the altimeter
display is switched to voltmeter and temperature. In SET-Mode 22 (UNIT
TEMPERATURE) you can choose between °C Celsius or °F Fahrenheit.
WARNING! The ALPHAMFD measures the temperature of the instrument
board (which approx. corresponds to outside temperature in open flex-wing
ultralights/microlights or the cabin temperature of closed fix-wing ULs). The
indicated temperature is not the actual outside temperature OAT. The
temperature is used for internal temperature compensation. It may NOT be
used for calculations of correcting factors to ICAO standard
atmosphere (density altitude). It is only suitable for information!
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