G-Shock GAC-100 - Manual

1
Operation Guide 5277
MA1306-EC Ú
To change the day indicator setting To adjust the time setting
Pull the Crown out to Click 1.
Push the Crown back in.
Push the Crown back in.
Rotate the Crown to change the
time setting.
When the second hand is at
12 o’clock, pull the
Crown out to
Click 2.
Rotate the Crown away from you
to set the day.
Note
Take care that you set the correct AM 
or PM time.
When changing the time, move the

minute hand four or fi ve minutes past
your fi nal setting, and then back it up
to the setting you want.
Note
The day indicator setting uses a 
31-day month. Make adjustments for
months of shorter lengths.
Avoid changing the day indicator

setting between the hours of 9 p.m.
and 1 a.m. Otherwise, the day
indicator may not change correctly
at midnight.
Specifi cations
Accuracy: ±20 seconds average per month
Stopwatch: Measuring Capacity: 11:59'59.95" (12 hours)
Measuring Unit: 1/20 second
Measurements: Elapsed time; split time; two fi nishes
Battery: One silver oxide battery (Type: SR927SW)
Battery Life: Approximately 3 years (2 hours stopwatch operation per day)
Low Battery Indicator: Second hand moves in 2-second increments when power
is low.
Stopwatch functions
Crown Operations
Some water-resistant models (100 meters, 200 meters)
have a screw-in crown. When you need to perform a crown
operation, rotate it towards you to unscrew it. Then pull
the crown out. Avoid applying undue force when pulling.
The watch loses its water resistance while the crown is
unscrewed. After performing a crown operation, fully screw
the crown back in. Crown
Loosen
If your watch has a rotary bezel...
You can rotate the bezel to align its
▼ mark with the
minute hand. Then you will be able to tell how much
time has elapsed since aligning the
▼ mark.
Start
Elapsed time
Current
Your watch may differ somewhat from the one shown in the illustration. 

Second Hand
Click 2
Click 1
Hour Hand Minute Hand
A
B
Stopwatch Second Hand
Stopwatch Hour Hand
Stopwatch Minute Hand
Stopwatch 1/20-second Hand
Day Indicator
Crown
Using the Stopwatch
Elapsed time
A A A A B
Start Stop Re-start Stop Reset
Split time
A B B A B
Start Split Split release Stop Reset
Two fi nishes
A B A B B
Start Split
First runner
fi nishes.
Display time of
fi rst runner. Stop
Second runner
fi nishes. Split release
Display time of
second runner. Reset
Important!
Do not operate the stopwatch with the crown pulled out. 
Note
The stopwatch 1/20-second hand will move for 10 minutes after you start an 
elapsed time operation. After that, it will stop at 0 position. When you stop the
elapsed time operation, the 1/20-second hand will move to the 1/20-second
reading for the current elapsed time.
The stopwatch measures elapsed time in 1/20-second increments up to 11 hours,
59 minutes, 59.95 seconds.
Perform the following procedure if the stopwatch hands do not return to their 0 (zero)
positions when you reset the stopwatch.
Use the A button to select the hand whose zero position you want to correct. Each
time you hold down A for about two seconds in the following procedure, it cycles to
the next hand to be corrected.
Use the B button in the following procedure to correct the 0 position of the currently
selected hand. Holding down B moves the current hand at high speed.
Correcting the 0 Positions of the Hands
Operational Flow
Pull the Crown out to Click 2.
Hold down A for about two seconds, the Stopwatch 1/20-second Hand will
rotate to indicate the 1/20-second hand setting mode.
If the hand does not align with 0 position, use the  B button to adjust it.
Hold down A for about two seconds, the Stopwatch Second Hand will rotate
to indicate the second hand setting mode.
If the hand does not align with 12 o’clock, use the  B button to adjust it.
Hold down A for about two seconds, the Stopwatch Hour Hand and
Stopwatch Minute Hand will rotate to indicate the hour hand and minute hand
setting mode.
If the hands do not align with 0 hours and 0 minutes, use the  B button to adjust
them.
After all of the hands are the way you want, push the Crown back in.
Important!
Timekeeping stops while the crown is pulled out. Correct the current time setting 
after performing the above operation.