4
Altimeter Operation
ACD-57 is capable of determining and displaying a precise pressure altitude and can be
used as primary means of altimetry.
Altimeter User Interface
The current altitude is displayed numerically and with a tape-style indicator, or trend
indicator. Depending on device configuration and other display content, the size of the
altitude display may vary.
Altitude display unit
QNE
22
26
12820
12840
29.97
m
12824
Tape-Style Altitude Indication
Current Altitude
Barometric reference (Inches Mercury)
QNE Softkey (Sets barometric
reference to 1013.25hPa)
Altitude display unit
Figure 4.1.: Altimeter user interface
Units to display altitude and barometric pressure are user configurable. Altitude can be
displayed in feet or meters, barometric pressure can be displayed in inches mercury or
hectopascals (which equals millibars).
Adjusting Barometric Reference
To enter the barometric reference selection page, rotate the inner knob or the outer knob
on the main page (In altimeter-only configuration) or push the BARO softkey (if additionally
a VHF transceiver and/or a XPDR is controlled).
24
ACD-57
·
Pilot’s Manual
·
rev. 1.0
·
2017/01/19