minute and count down from the selected time standard.) Then
press SET button once to hold the time. When the time
standard shows the exact time displayed, press the ST-SP
button to activate time start.
Setting Greenwich Mean Time or Zulu. Press
MODE button to advance annunciator to ZU and set time as for
local time above. Minutes and seconds do not need to be reset
if local time is correctly set. Press RST button to display
minutes/ seconds, then press again to activate complete display.
When changing time zones, the hour may be changed as
above. It will not be necessary to change the minutes/seconds.
Press the RST button twice to return to full time display.
Trip or flight timer. Press the MODE button to
advance the annunciator to FT. Press the ST SP button and
verify that display shows zero. The timer will activate at
takeoff and will stop at touchdown. The clock cannot be reset
during flight to prevent accidental erasing of flight time.
Elapsed time mode. Press the MODE button
until the annunciator is in ET position. Press RST button to set
time at zero. Then press the ST - SP button one time. To stop
the counting, press the ST - SP button. Ending time will be
displayed until RST button is pressed to clear the elapsed time.
The clock may be used in other modes and elapsed time will
remain until cleared by pressing RST button. If the timer is
counting when the RST button is pressed it will continue to
count from zero.
Downcounter mode. Press the MODE button to
advance the annunciator to DC position. Press SET button
twice; hour display will show zero. Next press ADV button
and hold until desired hour is displayed. To set minutes, again
press SET button one time, then hold ADV button until desired
minutes are displayed. To set seconds, press SET button one
time so that zeros show in the seconds display. Press ADV
button until desired number appears in the seconds display.
Press SET button. Press ST SP button and display will start
counting down. The counter will continue to count down if
other modes are selected. When the counter reaches zero, the
display will flash. Press the ST SP button and the display stops
The alarm function self-terminates
after one minute if not reset.
Change 2 2-79