Avidyne IFD540 Pilot's Manual page 143

User Option Item Title
Time Format
UTC
Local Time Offset
AUX Pages 4-35
Description
CAS message will be issued;
15 min – "Switch Tanks" CAS
message issued every 15 min;
30 min - "Switch Tanks" CAS
message issued every 30 min;
45 min – "Switch Tanks" CAS
message issued every 45 min;
60 min – "Switch Tanks" CAS
message issued every 60 min.
UTC – displays all times in the
system in zulu time format;
12 Hr* - displays all times in
the system in am/pm time
format;
24 Hr – displays all times in the
system in "military" 24 hour
time format.
Note: The 12 Hr and 24 Hr
selections are intended to be
used if local time is the overall
desired time format.
Just a display of current UTC
for reference
HH:MM – push in bottom right
IFD knob to put into edit mode
then twist the inner ring to
change in 15 minute
increments and then push knob
again to exit edit mode.
Note: Local time is a user
specified offset from UTC