CIRRUS DESIGN SR20, Pilot Operating Handbook

Page: 400 / 508

14 of 24 P/N 11934-S20
Section 9 Cirrus Design
Supplements SR20
BARO Selection
Upon initial start-up, the altitude selector enters BARO select
immediately after the self-test if it is receiving a valid altitude signal.
The setting can easily be entered at this time. At other times, it is
necessary to select the DTA entry and BARO modes in order to adjust
the BARO setting. After initial start-up, the Baro setting can be
changed at any time using the following procedure:
1. Press DTA button on altitude selector to enter the data entry
mode. ENT will be annunciated.
2. Press BAR button to display the BARO setting. Repeated presses
of the BAR button will toggle the display between millibars and
inches Hg.
• Note •
The BARO setting can also be displayed by pressing the ALT
button while in the ‘operate mode’ (i.e. SEL annunciator
illuminated).
3. Rotate the selector knob (CW to increase setting or CCW to
decrease setting). Only three digits are displayed for millibars: for
a BARO setting of 952.8 mb, the display will indicate 952; and for
a BARO setting of 1003.8 mb, the display will read 003. For inches
Hg, the 1/100 decimal position will not be selectable or displayed;
for example, a 29.92 inch Hg setting is input and displayed as
29.9.
4. Press DTA again to accept the entry.
Set Decision Height (DH)
1. Press altitude selector DTA button to enter the data entry (ENT)
mode.
2. Press DH button to enter decision height with the display reading
0.0. Use the altitude selector knob to set the desired decision
height to the nearest 100 ft above the desired decision height. For
example, for a DH of 1160 feet, set 1200 feet.
3. Press altitude DTA button again to enter the selected DH. The
display will show the selected decision height for approximately 5
seconds and then revert to ALT mode and display the altitude.
The DH annunciator will remain illuminated indicating a decision
Revision 3: 07-18-05