Citizen F900 - Indicating Summer Time; Using the Chronograph; Using Alarm; Checking and Adjusting Leap Second Setting

F900 User’s guide
Continued on the next page
Using alarm
The alarm on this watch always works based on the home time.
1.
Change the mode to [ALM] and pull the crown out to
position
2
.
The dual time indication indicates the current alarm time setting and the
second hand shows the current alarm setting (
ALM ON/OFF
).
• The hour and minute hands may automatically move to provide a clear
view of the alarm time setting.
2.
Rotate the crown to set the alarm time.
• If you rotate the crown quickly a few times, the hand will move
continuously. To stop the rapid movement, rotate the crown in either
direction.
3.
Press and release the lower right button
A
to set the alarm
setting (ALM ON/OFF).
• Each time you press button, the setting changes alternately.
4.
Change the mode to [TME] and push the crown in to position
0
to finish the procedure.
The second hand returns to indicate the seconds.
To stop alarm
Press any button.
Checking and adjusting leap second setting
• The leap second setting can be adjusted by executing leap second reception.
You can find a list of leap seconds at the homepage of IERS
(INTERNATIONAL EARTH ROTATION & REFERENCE SYSTEMS
SERVICE).
http://hpiers.obspm.fr/eop-pc/earthor/utc/TAI-UTC_tab.html
1.
Change the mode to [SET] and pull the crown out to position
2
.
The second hand points to 0 second and stops.
2.
Press and hold upper right button
B
for 2 seconds or more.
Using the “0:00:00” position as the starting point, the minute and second
hands indicate the leap second setting.
When the leap second setting is
“−36 seconds”
When the leap second setting is
“−65 seconds”
The hands point to “0 minute
36 seconds”.
The hands point to “1 minute
5 seconds”.
3.
Turn the crown to adjust the setting if the leap second is not
correct.
• Adjustable range is from 0 to ‒90 seconds.
4.
Change the mode to [TME] and push the crown in to position
0
to finish the procedure.
The second hand returns to indicate the seconds.
Indicating summer time
1.
Change the mode to [
TME
] or [
LLI
] and pull the crown out
to position
2
.
The function hand indicates summer time setting of the home time (
SMT
ON/OFF
).
• When the mode is [UTC], you can only change summer time setting of
the home time.
2.
Press and release the lower right button
A
.
SMT ON
Summer time is indicated.
SMT OFF
The standard time is indicated.
• Each time you press button
A
,
SMT ON
and
OFF
changes alternately.
3.
Press and release the upper right button
B
.
The function hand indicates summer time setting of the local time (
SMT
ON/OFF
).
• Each time you press button
B
, the minute hand of setting target
slightly moves and the target (home time/local time) of time zone
setting changes alternately.
4.
Press and release the lower right button
A
to change
summer time setting of the local time.
5.
Push the crown in to position
0
to finish the procedure.
The second hand returns to indicate the seconds.
Using the chronograph
The watch can measure up to 23:59’59.95” by 1/20 seconds.
1.
Change the mode to [CHR] and push the crown in to position
0
.
0.00 second is indicated.
2.
Start measurement.
Start/stop: press button
B
.
• 1/20 chronograph seconds are indicated by the function hand only
when the chronograph is stopped.
Reset: press button
A
while the chronograph is stopped.
After measurement
Reset the chronograph and change the mode to [
TME
].