Temperature Measurement
The watch can be used to take current air temperature readings.
Important!
Check the information at the link below to find out how to ensure correct readings.
Checking the Current Temperature
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Enter the Thermometer Mode.
Entering the Thermometer Mode will start temperature measurement and display the result.
After you enter the Thermometer Mode, the watch takes readings about every five seconds for three minutes. After that, a measurement is taken about every two minutes.
To retrigger measurement, press (A).
Note
If the hour and/or minute hand is located over the digital display when you perform a temperature measurement, the hands will temporarily shift to the 22-second or 38-second position to allow easier reading of measurement values. The hands will unshift to their normal positions after about three seconds.
The watch will automatically return to the Timekeeping Mode if you do not perform any operation in the Thermometer Mode for about one hour.
The measuring range is -10.0 °C to 60.0 °C (14.0 °F to 140.0 °F) (0.1 °C (0.2 °F) units). [- - .-] will appear for the measured value if it is outside the allowable range.
To return to the Timekeeping Mode, hold down (B) for at least two seconds.
Calibrating Temperature Readings (Offset)
The watch’s temperature sensor is adjusted at the factory and normally does not require calibration. However, you can calibrate the displayed value if you notice major errors in readings.
Important!
Check to make sure that the value you use for calibration produces correct temperature readings.
Before calibrating the temperature reading, remove the watch from your wrist and leave it in the area where you plan to measure temperature for about 20 or 30 minutes to allow the case temperature to become the same as the air temperature.
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Enter the Thermometer Mode.
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Loosen the crown and then pull it out.
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Rotate the crown to calibrate the temperature value.
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Push the crown back in and then lock it.
This displays the current temperature.
Calibration unit: 0.1 °C (0.2 °F)
To return the barometric pressure setting to its initial factory default, press (A) and (C) at the same time.
Note
If you do not perform any operation for about two minutes after pulling out the crown, crown operations will automatically become disabled. If that happens, push the crown back in and then pull it out again.
Specifying the Temperature Measurement Unit
You can select either Celsius (°C) or Fahrenheit (°F) as the temperature display unit.
Important!
When Tokyo (TYO) is the Home City, the temperature unit is fixed as Celsius (°C) and cannot be changed.
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Enter the Timekeeping Mode.
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Loosen the crown and then pull it out.
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Press (B) nine times.
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Rotate the crown to select a temperature unit.
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Push the crown back in and then lock it.
The currently selected Home City will appear on the display.
This causes [UNIT] to appear, with [°C] or [°F] flashing.
[°C]: Celsius
[°F]: Fahrenheit
Note
If you do not perform any operation for about two minutes after pulling out the crown, crown operations will automatically become disabled. If that happens, push the crown back in and then pull it out again.
Temperature Reading Precautions
Body temperature, direct sunlight, and humidity all have an effect on temperature readings. To help ensure more accurate temperature readings, remove the watch from your wrist, wipe it dry of any moisture, and place it in a well-ventilated location not exposed to direct sunlight. You should be able to take temperature readings after about 20 to 30 minutes.