User manual

78 79
78 79
Operating the Timers
The flight timer will always be automatically reset to :00 whenever
power is interrupted either by the avionics master switch or the unit’s
ON/OFF switch. Operation of the flight timer is automatic. The timer is
started in the moment the aircraft takes off. It will stop at the mo-
ment the aircraft touches down during landing. The elapsed timer
may be reset back to :00 by pressing the SET/RST button. It will then
start counting up again. (Note: pressing the SET/RST button will reset
the elapsed timer whether it is being displayed or not.). Resetting the
flight timer is possible on the ground only.
The elapsed timer also has a „count-down” mode. To enter the count-
down mode, the SET/RST button is depressed for about two seconds,
or until the „ET” annunciation begins to flash. It is now in the ET set
mode, and a time up to 59 minutes, 59 seconds may be preset into
the elapsed timer with the concentric knobs. The preset time will be
displayed and remain unchanged until SET/RST is pressed again, which
will start the elapsed timer counting down from the preset time. When
the timer reaches :00 it will start to count up as the display flashes for
15 seconds and an aural alarm, if installed, is activated for about 1
second.
Note: The standby frequency which is in memory while flight time
or elapsed time modes are being displayed may be called back by
pressing the FRQ button, then transferred to active use by pressing the
FRQ button again.
While FLT or ET is displayed the „in use” frequency on the left side of
the window may be changed, by using the frequency select knobs,
without any effect on the stored standby frequency or the other modes.
This feature is especially useful when searching for stations with
unknown frequencies.