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2. OPERATION CHART : QW-1681
to change from mode to mode.
In the Timekeeping Mode, Temperature Data Recall Mode and Alarm Mode, press
to illuminate the display for about two seconds. In the Countdown Alarm Mode and Stopwatch Mode,
to illuminate the display for about two seconds.
You can select display of either the current date
(month and day) or temperature in the Timekeeping
to toggle between the date and
To set the time and date
1. While the current date (not the temperature) is
displayed in the Timekeeping Mode, hold down
until the seconds digits flash on the display.
to change the selection (flashing) in the
3. While the seconds setting is selected (flashing), press
to reset it to 00. If you
while the seconds setting is in the range of 30 to 59, the seconds are reset
to 00 and 1 is added to the minutes. If the seconds setting is in the range of 00 to
29, the minutes count is unchanged.
4. While any other setting (besides seconds) is selected (flashing), press
increase it or
to decrease it. While the 12/24-hour format setting is selected,
to toggle it between 12 and 24.
Except for the seconds or 12/24-hour setting, holding down a button changes the
setting at high speed.
5. After you set the time and date, press
to return to the Timekeeping Mode.
The day of the week is automatically set in accordance with the date.
The date can be set within the range of January 1, 1995 to December 31, 2039.
If you do not operate any button for a few minutes while a setting is flashing, the
flashing stops and the watch goes back to the Timekeeping Mode automatically.
Current Temperature Display
A built-in temperature sensor measures temperature and shows the measured value
on the display. The thermometer can be calibrated to correct for errors.
Temperature measurements are affected by your body temperature (while you are
wearing the watch), direct sunlight, and moisture. To achieve a more accurate
temperature measurement, remove the watch from your wrist, place it in a well
ventilated location out of direct sunlight, and wipe off all moisture from the case. It
takes approximately 20 to 30 minutes for the case of the watch to reach the actual
Accurate temperature measurements cannot be achieved while you are wearing the
watch. The following graph illustrated affects of body temperature on actual
Temperature measured when watch is worn on wrist
10 C20 C30 C
Differences caused by
temperture or clothing
About Temperature Measurement
A temperature measurement operation is
performed whenever you switch from month-day
display to temperature display.
Temperature measurements are performed and
the temperature value is updated every two
minutes while the current temperature is
while the current temperature is
displayed executes a temperature measurement
operation and stores the result in memory along
with the time of the measurement.
At the top of each hour, the current temperature
is measured and stored in memory along with
the time of the measurement.
The display shows " .
°C" if a measured value falls outside the range of 20°C
°C. The normal display will return as soon as the temperature returns within the
Memory can hold up to 100 temperature data entries, which are managed on a first-
in, first-out basis. See "Temperature Data Recall Mode" of this manual for details on
how to recall memory data.
The first data item is stored as data item 1, the second as data item 2, and so on up
to 100 data items.
When a new data item is stored while there are already 100 data items (numbered 1
to 100) in memory, the new data item is "pushed" into memory from the top (on top of
item 100). This shifts all of the previous data items down one position (item 100
becomes item 99, 99 becomes 98, and so on), and item 1 is deleted.
Calibrating the Temperature Measurement
The temperature sensor of this watch is calibrated at the factory before shipment and
further adjustment is normally not required. If noticeable error is found in the
temperature readings produced by the watch, you can adjust it to correct the error.
Incorrectly calibrating the temperature measurement of this watch can result in
incorrect readings. Carefully read the following before doing anything.
Compare the readings produced by the watch with those of another reliable,
If calibration is required, remove the watch from your wrist and wait for 20 or 30
minutes to give the temperature of the watch time to stabilize.
Perform the temperature calibration before procedure as quickly as possible to avoid
the temperature of the watch being affected by your body temperature.
You can also perform temperature calibration underwater, if the water temperature is
To calibrate the temperature
while in the Current Temperature
Display and the current temperature digits flash.
2.Each press of
increase the displayed
temperature by 0.1
°C, and pressing the
decrease it by 0.1
You can calibrate the temperature within a range
°C to +9.9°C.
at the same time to reset the
temperature calibration to the factory setting.
3.After calibrating the temperature, press
return to the Current Temperature Display.
If you do not operate any button for a few minutes
while a selection is flashing, the flashing stops and
the watch goes back to the Current Temperature
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.
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
Static electricity or magnetic force can interfere with proper operation of the auto
light switch function. If the auto 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.
Parallel to ground
More than 15 degrees
More than 15 degrees
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to increase the selected number or
decrease it. Holding down either button changes
the selection at high speed.
To set the starting value of the countdown time to 24 hours, set 0:00'00".
4. After you set the countdown start time, press
to return to the Countdown Alarm
If you do not operate any button for a few minutes while a selection is flashing, the
flashing stops and the watch goes back to the Countdown Alarm Mode
To use the countdown alarm
while in the Countdown Alarm Mode to start the countdown alarm.
again to stop the countdown alarm.
You can resume countdown alarm operation by pressing
3. Stop the countdown alarm and then press
to reset the countdown time to its
When the end of the countdown is reached and auto repeat timing is off, the alarm
sounds for 10 seconds or until you stop the alarm by pressing any button.
Countdown timing stops and the countdown time is automatically reset to its starting
value after the alarm stops.
To switch auto repeat timing on and off
1. Hold down
while in the Countdown Alarm Mode. The hour digits flash on the
display because they are selected.
to toggle auto repeat on and off.
to return to the Countdown Alarm Mode.
When the end of the countdown is reached while auto repeat is on, the alarm sounds,
but the countdown restarts from the beginning without stopping. You can stop the
countdown by pressing
and manually reset to the start time by pressing
If you set a starting time of 10 seconds or less and have Auto Repeat turned on, the
countdown alarm tone (which normally sounds for 10 seconds) sounds for only one
COUNTDOWN ALARM MODE
The countdown alarm can be set within a range of 1
second to 24 hours. When the countdown reaches
zero, an alarm sounds for 10 seconds or until you
press any button.
To set the countdown start time
1. Hold down
while in the Countdown Alarm
Mode. The hour digits flash on the display
because they are selected.
to change the selection in the following
To turn the progress beeper on and off
while in the Countdown Alarm Mode to toggle the progress beeper on and off.
When the progress beeper is turned on, the watch beeps as the countdown time
passes the 10, 5, 4, 3, 2, and 1-minute marks, and the 50, 40, 30, 20, 10, 5, 4, 3, 2,
and 1-second marks.
Auto repeat indicator
Elapsed time measurement
Split time measurement
Split time and 1st-2nd place times
Record time of
Record time of
The stopwatch Mode lets you measure elapsed
time, split times, and two finishes. The range of the
stopwatch is 23 hours, 59 minutes, 59.99 seconds.
You can use the EL backlight at any time while the
stopwatch is operating.
TEMPERATURE DATA RECALL MODE
Use this mode to recall temperature data that was
stored in memory. Memory can hold up to 100
temperature data entries, which are managed on a
first-in, first-out basis.
When memory is full, the next measurement
causes the oldest entry to be deleted
to scroll forward through data, and
scroll back. Recalling data starts with data item
100. You can then scroll back through the data
(99, 98, 97, and so on.)
To delete all data in memory, hold down
cannot delete individual data items.
About the Auto-Start function
With the Auto-Start function, the watch performs a
5-second countdown. When the countdown reaches
zero, stopwatch operation starts automatically.
During the final three seconds of the countdown, a
beeper sounds with each second.
To turn the Auto-Start function on and off
While the display is showing all zeros in the
Stopwatch Mode, press
to toggle it on and off.
5 is shown in the display while Auto-Start is turned
on. 5 is not shown and the display shows all zeros
when Auto-Start is turned off.
To stop the Auto-Start countdown and return to the all-zeros display, press
while the Auto-Start countdown is in progress immediately start the
You can set five independent alarms with the hour,
minutes, month and day. Use the Alarm Mode to turn
the alarm and the Hourly Time Signal on and off.
When an alarm is turned on, an alarm tone
sounds for 20 seconds when the preset time
When the Hourly Time Signal is turned on, the
watch beeps every hour on the hour.
The types of alarm you get depends on the
information you set.
To set a daily alarm
Set the hour and minutes for the alarm time. Set " "
for the month and "
" for the day. This type of
setting causes the alarm to sound everyday at the
time you set.
Hourly time signal
To switch the auto light switch function on and off
In the Timekeeping Mode, hold down
for one or two seconds to turn the auto light
switch function on and off.
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 three hours after you turn it on. Repeat the
above procedure to turn the auto light switch function back on if you want.
(Timekeeping Mode, Temperature Data Recall Mode, Alarm Mode) or
(Countdown Alarm Mode, Stopwatch Mode) illuminates the display, regardless of
the auto light switch's on/off setting.
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 backligfht 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.
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
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.
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 backlight 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 backlight can create a distraction, which
can result in a traffic accident and serious personal injury.
To set a date alarm
Set the month, day, hour and minutes for the alarm time. This type of setting causes the alarm
to sound at the specific time, on the specific date you set.
To set a 1-month alarm
Set the month, hour and minutes for the alarm time. Set "
" for the day. This type of setting
causes the alarm to sound every day at the time you set, only during the month you set.
To set a monthly alarm
Set the day, hour and minutes for the alarm time. Set " " for the month. This type of setting
causes the alarm to sound every month at the time you set, on the day you set.
To set the alarm time
while in the Alarm Mode to select Alarm 1 through Alarm 5.
Hourly Time Signal
2. After you select an alarm, hold down
until the hour digits start to flash on the display. The
hour digits flash because they are selected. At this time the Alarm is automatically switched
to change the selection in the following sequence.
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to increase the number or
to decrease it. Holding down either button changes
e current number at high speed.
he format (12-hour and 24-hour) of the alarm time matches the format you select for norm
hen setting the alarm time using the 12-hour format, take care to set the time correctly as
orning or afternoon.
fter you set the alarm time, press
to return to the Alarm Mode.
you do not operate any button for a few minutes while a selection is flashing, the flashing
ops and the watch goes back to the Alarm Mode automatically.
stop the alarm
ess any button to stop the alarm after it starts to sound.
switch an alarm and Hourly Time Signal on and off
the Alarm Mode, press
to select an alarm or the Hourly Time Signal.
When the alarm or Hourly Time Signal you want to is selected, press
to switch it on and
any alarm is on, the Alarm On indicator is shown on the display when you change to
test the alarm
while in the Alarm Mode to sound the alarm.
Alarm on indicator
Hourly time signal on indicator