Aspen Avionics Evolution EFD1000 PFD - 4.1.3. Altimeter

CHAPTER 4, REFERENCE GUIDE
EFD1000 PFD Pilot’s Guide
Page 4-8 A-01-184-00 REV B
EFD1000 PFD Pilot’s Guide
EFD1000 PFD Pilot’s Guide
4.1.3. Altimeter
The altimeter is comprised of an altitude bug, a numerical altitude value (drum), a
moving tape, a MINIMUMS annunciation and adjustable value, a Decision Height (DH)
alert, and a visual/aural altitude alerter (Figure 4-11).
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Altitude Alerter
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MINIMUMS Adjustment
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Selected Altitude
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MINIMUMS Alert
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Numerical Altitude Value
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Altitude Bug
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Altitude Tape
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Decision Height Alert
The Altitude Tape range is from -1,600 to 51,000 feet. Major tick marks are provided
every 100 feet and minor tick marks every 20 feet. A barometric pressure adjustment is
provided to the pilot for display of altitude above mean sea level.
The numerical altitude value is displayed in a rolling drum format in the center of the
airspeed tape ,with numbers moving downward as the altitude increases and upward
as altitude decreases. The numerical altitude value shows the altitude to the nearest
20 feet.
If the altitude exceeds 51,000 feet, the numerical altitude value is dashed and the tape
is frozen at this limit. All altitude information is removed and replaced with a red “X” with
the textual annunciation of “ALT FAIL,” when altitude data is invalid (Figure 4-12).
Figure 4-11 Altimeter
Figure 4-12 Altitude Failure
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