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Operation Guide 5160
• While the 12/24 setting is selected, press C to toggle it between 12-hour and 24-
hour timekeeping.
4. While any other digits are selected (flashing), press C to increase them. Holding
down C changes the digits at high speed.
5. After you make the settings you want, press A to exit the setting screen.
• The day of the week is set automatically in accordance with the date.
• The date can be set within the range of January 1, 2000 to December 31, 2099.
To set the hands
When the analog setting does not match the time shown on the display, use this
procedure to correct the analog setting.
1. When the second hand reaches the 12 o'clock position (00 seconds), pull out the
crown to stop the second hand.
2. Rotate the crown to set the hour and minutes.
3. When the seconds count on the digital display reaches 00, press in the crown to
restart the second hand.
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• The backlight may not illuminate if the face of the watch is more than 15 degrees off
parallel to the left or right. Make sure that the back of your hand is parallel to the
ground.
Parallel to ground
More than 15 degrees
too high
• Static electricity or magnetic force can interfere with proper operation of the auto
light switch function. If the backlight does not illuminate, try moving the watch back
to the starting position (parallel with the ground) and then tilt it back toward you
again. If this does not work, drop your arm all the way down so it hangs at your side,
and then bring it back up again.
• Under certain conditions the backlight may not light until about one second or less
after turn the face of the watch towards you. This does not necessarily indicate
malfunction of the backlight.
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• Pressing C in the Timekeeping Mode (except when making any settings)
illuminates the display, regardless of the auto light switch's on/off setting.
Caution
• The backlight of this watch employs an electro-luminescent (EL) light, which loses
its illuminating power after very long term use.
• Frequent use of the backlight shortens the battery life.
• The watch emits an audible sound whenever the display is illuminated. This is
because the EL light vibrates slightly when lit. It does not indicate malfunction of the
watch.
Warning!
• Never try to read your watch when mountain climbing or hiking in areas that
are dark or in areas with poor footing. Doing so is dangerous and can result in
serious personal injury.
• Never try to read your watch when running where there is the danger of
accidents, especially in locations where there might be vehicular or
pedestrian traffic. Doing so is dangerous and can result in serious personal
injury.
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Stopwatch Mode
The Stopwatch Mode has a capacity of 9 hours, 59 minutes, 59 seconds. You can
also record lap times and split times, which are recorded in memory for later recall in
the Recall Mode.
Lap time or Split time
Elapsed time
Minutes
1/100 second
Seconds
Elapsed time is measured in 1/100 second units up to 59' 59" 99. After that, it is
measured in 1 second units.
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To measure elapsed time
The following operation is the same regardless of whether you want to record lap
times or split times.
1. Press A to start the stopwatch.
2. Press A to stop the stopwatch.
• You can restart and stop the measurement operation whenever you want by
pressing A again.
3. Press C to clear the stopwatch to all zeros (00' 00" 00).
To record a lap time
1. In the Recall Mode, use A to select lap time as the timing operation.
• See "Recall Mode" for more information about selecting the stopwatch operation.
2. Enter the Stopwatch Mode, and then press A to start the stopwatch.
3. Press C to freeze the lap time and display the lap number for about seven seconds.
Stopwatch timing continues internally.
• The first nine lap times you record are stored in memory. The final time you record
when you press A is also stored, for a total of 10 times.
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More than 15 degrees
too low
After the first hour
Hours
Seconds
Minutes
About the Backlight
About the Auto Light Switch Function
When the auto light switch function is turned on, the backlight automatically turns on
for two seconds under the conditions described below. Avoid wearing the watch on the
inside of your wrist. Doing so causes the auto light switch to operate when not
needed, which shortens battery life.
Moving the watch to a position that is parallel to the ground and then tilting it
towards you approximately 40 degrees causes the backlight to illuminate.
Parallel to ground
To switch the auto light switch function on and off
In the Timekeeping Mode (except when making any settings), hold down C for two
seconds to turn the auto light switch function on and off.
Auto light switch indicator
Hold down C.
ON
• The auto light switch indicator is shown on the display in all modes while the auto
light switch function is on.
• In order to protect against running down the battery, the auto light switch function is
automatically turned off approximately five hours after you turn it on. Repeat the
above procedure to turn the auto light switch function back on if you want.
• Never try to read your watch when riding on a bicycle or when operating a
motorcycle or any other motor vehicle. Doing so is dangerous and can result
in a traffic accident and serious personal injury.
• When you are wearing the watch, make sure that its auto light switch function
is turned off before riding on a bicycle or operating a motorcycle or any other
motor vehicle. Sudden and unintended operation of the auto light switch can
create a distraction, which can result in a traffic accident and serious personal
injury.
About Laps and Splits
Lap Time
A lap time is the amount of time it takes for you to get from one point to
another during a race. When running on a track, for example, you can time
how long it takes you to complete each lap.
Split Time
A split time is the time from the start of a race until the point that the split is
measured. For example, you could measure split times to determine how long
it takes for you to get from the starting line to the 5-kilometer mark, the 10-
kilometer mark, etc.
• If you continue to perform the lap time operation after
1/100 second
there are already nine times in memory, the lap times are
Seconds
shown on the display but are not stored into memory.
• You can perform up to 99 lap time operations (9 stored
Minutes
+ 90 unstored) during each elapsed time operation.
• You can recall lap times using the Recall Mode.
4. Press A to stop the time measurement.
5. Press C to clear the stopwatch to all zeros.
To record a split time
1. In the Recall Mode, use A to select split time as the
timing operation.
• See "Recall Mode" for more information about selecting
Lap number
the stopwatch operation.
2. Enter the Stopwatch Mode, and then press A to start
LAP indicator
the stopwatch.
3. Press C to freeze the split time and display the split
number for about seven seconds. Stopwatch timing
continues internally.
40 °
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OFF
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