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form by two digits for the minutes and two digits for
the seconds.
The Chronometer is operated using the CHR pushbutton.
A first press on the CHR pushbutton starts the
chronometer, a second press stops it and freezes the
display, and a press on the RST pushbutton resets it
and the display goes off.
For example:
CHR = 37min 28sec.
TMUCLOA02-T02 LEVEL 1
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TMUCLOA02-P02 LEVEL 1
CLOCK: ELECTRICAL CLOCK PRESENTATION -
UNIVERSAL TIME COORDINATED (UTC) AND DATE / ELAPSED TIME (ET) / CHRONOMETER
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SELF EXAMINATION
The clock provides UTC to:
A - Only the two FMGCs.
B - The CFDIU, FDIU and the two FMGCs.
C - Lower ECAM display.
TMUCLOA02 LEVEL 1
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31 - INDICATING/RECORDING SYSTEMS
31-21-00 CLOCK: ELECTRICAL CLOCK
UTILIZATION
CONTENTS:
Test
Universal Time Coordinated (UTC) and Date
Universal Time Coordinated (UTC) Setting
Data Setting
Chronometer
Elapsed Time
Failure
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UF94200
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CLOCK: ELECTRICAL CLOCK UTILIZATION
TEST
To test the clock, the annunciator light switch must
be set to TEST.
Then all the displays should show eight.
UNIVERSAL TIME COORDINATED (UTC) AND DATE
When the clock is in normal configuration it displays
the time.
The date is displayed by pressing the SET turn and
push button when the time of the day is displayed.
By pressing the SET turn and push button once more the
time of the day will be displayed again.
UNIVERSAL TIME COORDINATED (UTC) SETTING
The setting of the UTC is done with the UTC selector.
When the selector is in SET position, the second digits
are blanked, the minute digits flash and the hour
digits are frozen.
By rotating the SET button clockwise the minutes
increase, anticlockwise the minutes decrease.
By pushing the SET button the hours flash, the minutes
are frozen and the seconds are blanked.
By turning the SET button, hours can be adjusted.
When the UTC selector is moved from SET to INT the
clock starts running from the adjusted time with the
second digits at 00.
When the UTC selector is in GPS position, the clock
is synchronized on the GPS time, if a GPS signal is
present.
DATE SETTING
The setting of the date is done with the UTC selector.
By pressing the SET button, the date is displayed.
By setting the UTC selector in SET position, the year
digits flash and the month and day digits are frozen.
By turning the SET button clockwise or anticlockwise,
years can be modified to obtain the chosen value.
By pushing the SET button, the months and days can be
adjusted in the same way.
CHRONOMETER
A first press on the CHR pushbutton starts the
chronometer, a second press stops it and freezes the
display, and a press on the RST pushbutton resets it.
ELAPSED TIME
To activate the ET function, the ET selector must be
set to RUN.
When set to STP, the ET counter stops, and the display
is frozen.
To reset the display, the selector must be set to RST
(spring loaded position) and it returns to STP.
FAILURE
With a clock failure or a loss of power supply, the
digital displays are no longer available.
With a loss of main electrical power supply, the time
is still counted in memory through the A/C battery
supply, except for the chrono and ET functions.
TMUCLOB02-T01 LEVEL 1
EFFECTIVITY 31-21-00 Page 2
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 236
ALL
TMUCLOB02-P01 LEVEL 1
CLOCK: ELECTRICAL CLOCK UTILIZATION
EFFECTIVITY 31-21-00 Page 3
Nov 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
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