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2. OPERATION CHART : QW-1680
GENERAL GUIDE
� Press to change from mode to mode. � In the Timekeeping Mode, Temperature Data Recall Mode and Alarm Mode, press press to illuminate the display for about two seconds.
Timekeeping Mode Month-day display Current Temperature Display Press Press Countdown Alarm Mode Stopwatch Mode Temperature Data Recall Mode Alarm Mode
to illuminate the display for about two seconds. In the Countdown Alarm Mode and Stopwatch Mode,
TIMEKEEPING MODE
Day of week Month Day
Switching between Celsius and Fahrenheit
1.Hold down while in the Current Temperature Display and the current temperature digits flash. 2.Press to select either Celsius ��C� or Fahrenheit ��F�. 3.After you select the Celsius or Fahrenheit, press to return to the Temperature Display. Flashes � 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 Display automatically.
You canand day) or temperaturethe the Timekeeping (month select display of either in current date Mode. Press to toggle between the date and temperature display.
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. 2. Press to change the selection (flashing) in the following sequence.
Hour Seconds PM Minutes indicator
Seconds Day Hour Month Minutes Year 12/24-Hour Format
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.
3. While the seconds setting is selected (flashing), press to reset it to 00. If you press 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 to increase it or to decrease it. While the 12/24-hour format setting is selected, press 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.
Important
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, accurate thermometer. � 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 stable.
To calibrate the temperature
1. Hold down 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�C. � If you have selected Fahrenheit as your unit of measurement, the above operations change the reading by 0.2�F. � You can calibrate the temperature within a range of �9.9�C to +9.9�C (�18.0�F to +18.0�F). � Press and at the same time to reset the temperature calibration to the factory setting. 3. After calibrating the temperature, press to 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 Display automatically.
Current Temperature Display
A built-in temperature sensor measures temperature and shows the measured value on the display. The readout from the temperature sensor can also be switched between Celsius (�C) and Fahrenheit (�F). The thermometer can be calibrated to correct for errors.
Important
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 surrounding temperature. Accurate temperature measurements cannot be achieved while you are wearing the watch. The following graph illustrated affects of body temperature on actual temperature.
40� C 30� C
Flashes
ABOUT THE BACKLIGHT
Temperature
20� C 10� C
Approximate Differences caused by individual body temperture or clothing
10� C 20� 30� C C 40� C
0� C
Temperature measured when watch is worn on wrist
� Pressing (Timekeeping Mode, Temperature Data Recall Mode, Alarm Mode) or (Countdown Alarm Mode, Stopwatch Mode) illuminates the display for about two seconds. � The backlight of the watch employs an electro-luminescent (EL) light, which loses illuminating power after very long use. � The illumination provided by the backlight may be hard to see when viewed under direct sunlight. � The watch will emit an audible sound whenever the display is illuminated. This is caused by a transformer that vibrates when the EL panel lights up. It does not indicate malfunction of the watch. � The backlight automatically turns off whenever an alarm sounds.
About Temperature Measurement
Current � A temperature measurement operation is Temperature temperature performed whenever you switch from month-day graph display to temperature display.
COUNTDOWN ALARM MODE
Mode indicator 1/10 seconds
� Temperature measurements are performed and the temperature value is updated every two minutes while the current temperature is displayed. � Pressing 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 (or �F)� if a measured value falls outside the range of �20�C to 60�C (�4�F to 140�F). The normal display will return as soon as the temperature returns within the allowable range. � Memory can hold up to 100 temperature data entries, which are managed on a firstin, 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.
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. 2.Press to change the selection in the following sequence.
Hour Minutes Seconds
3.Press to increase the selected number or to 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 Mode. � 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 automatically.
Hours Seconds Minutes
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