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FLIGHT INSTRUMENTS
Flight Crew Operating Manual REV 46, Jul 21, 2005
CSP 700−6
Volume 2
11−10−48
CLOCK
Two digital clocks synchronized to GPS time and date from GNSSU No. 1 are installed in the cockpit.
The clocks provide time and date information for the avionics equipment. Each clock provides GPS
or internal time and date, local time, chronometer and elapsed time functions. The clock
automatically enters GPS mode when the clock receives a valid GPS signal and automatically enters
internal mode if the GPS signal becomes invalid
When power is initially applied to the clock and GPS is invalid, the clock enters SET mode and all
functions can be set in sequence. The clock will enter normal operation by pressing the MODE
button for 2 seconds.
After the clock has been set via GPS or manually, changing the time and date is accomplished by
entering each mode individually and pressing the MODE button for 2 seconds. When setting is
finished, press the MODE button for 2 seconds to enter normal operation.
NOTE
If GPS is valid, only local time can be changed.
Time/Date Display
Displays the following:
GF1110_103
SEL
DT GPS INT LT
ET
CHR
MODE
ET
RST
CHR
GPS (UTC), Internal or Local time
in hours, minutes and seconds.
Date display provides day,
month and year.
ET SEL Pushbutton
Enters ET mode and displays
current elapsed time. Used to
decrease data during time setting.
ET RST Pushbutton
Resets the elapsed timer (only
active with WOW). Used to
increase data during time setting.
MODE Pushbutton
Controls selection of DT,
GPS/INT or LT mode.
Used in conjunction with the
ET SEL/RST pushbuttons to
set time and date.
CHR Pushbutton
Controls the start, stop and reset
function of the chronometer display.
ET/CHR Display
Displays elapsed time or chronometer
time. ET in hours and minutes and
CHR in minutes and seconds.
FLIGHT INSTRUMENTS
REV 46, Jul 21, 2005 Flight Crew Operating Manual
CSP 700−6
Volume 2
11−10−49
CLOCK (CONT'D)
Effectivity:
· Airplanes 9002 thru 9122 not incorporating Service Bulletin:
· SB 700−31−012, Clock System − Introduction of two Digital Clocks Using GPS Input for
Time Setting..
Two digital electronic clocks are installed on the side panels and are the time base source for the
avionics equipment.
Each clock contains its own time base with GMT, CHR, local and ET functions.
Second Hand
ET Pushbutton
Controls elapsed time readout
and during time setting, acts as
a cursor control.
Time Setting/Display Selector
Used in conjunction with ET/CHR
pushbuttons
to set applicable readouts.
SET
− Cycles through LOC minutes/hours
− Cycles through day/month/year
GMT/LOC/DATE
Time/Date Display
Indicates the following:
GMT, Local time, Date and year.
Chronograph Pushbutton
Controls start, stop and reset functions
of chronograph display and second
hand with successive push operations.
ET/CHR Display
Displays elapsed time or
chronometer time. ET in
hours and minutes and
CHR in minutes.
GF1110_053
− Cycles through GMT minutes/hours
− Displays time/date at upper readout.
FLIGHT INSTRUMENTS
Flight Crew Operating Manual REV 46, Jul 21, 2005
CSP 700−6
Volume 2
11−10−50
CLOCK (CONT'D)
Time Setting
Set at Power−up
At the first application of power, the clock will be in GMT minutes adjustment if GPS is invalid
and the clock is not transmitting on the ARINC bus. If the GPS data is valid, the clock is
automatically updated and switched in GPS mode.
In the SET function, the GPS minute’s digits are flashing. The flashing rate is 1 flash per
second. The setting is obtained by pressing the ET RST button to increase the data. The
counter increments, 1 digit for each push of the button. The INT flag is lit.
• By depressing the MODE button, the GMT hour digit is flashing, and you can adjust the
display in the same way. The INT flag is lit.
• By depressing the MODE button once more, the year digits are flashing and you can
adjust the display in the same way. The DT flag is it.
• By depressing the MODE button once, the month digits are flashing and you can adjust
the display in the same way. The DT flag is lit.
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