3.Place the watch on a level surface facing any direction you want, and press B to calibrate the first direction.
•When the calibration procedure is complete, the message OK appears in the upper display area. This soon changes to
4.Rotate the watch 180 degrees.
5.Press B again to calibrate the second direction.
•When the calibration procedure is complete, the message OK appears in the upper display area. After a short while, the watch automatically returns to the Digital Compass Mode screen.
Precautions about bidirectional calibration
•You can use any two opposing directions for bidirectional calibration. You must, however, make sure that they are 180 degrees opposite each other. Remember that if you perform the procedure incorrectly, you will get wrong bearing sensor readings.
•Do not move the watch during the one or two seconds (from the point you press B up to the point that OK appears in the upper display area) that the calibration of each direction is in progress. If you do, the message
appears in the upper display area, which means you have to restart the bidirectional calibration procedure from the beginning.
•The appearance of 
during bidirectional calibration can also be caused by local interference. If you suspect that this is the case, move to another location and try the procedure again.
•You should perform bidirectional calibration in an environment that is the same as that where you plan to be taking direction readings. If you plan to take direction readings in an open field, for example, calibrate in an open field.
To perform northerly calibration
1. While in the Digital Compass Mode, hold down A until the upper display area changes to show
2. Press D to start the northerly calibration procedure.
• At this time, the indicator (direction N) appears in the upper display area.
3.Place the watch on a level surface, and position it so that its 12 o’clock position points north (as measured with another compass).
4.Press B to start the calibration operation.
•When the calibration procedure is complete, the message OK appears in the upper display area. After a short while, the watch automatically returns to the Digital Compass Mode screen.
Changing the Barometric Pressure and Temperature Units
Changing the barometric pressure units automatically restarts the barometric pressure graph.
To change the Barometric Pressure and Temperature Units
1.Press C to enter the Barometer/ Thermometer Mode.
2.Hold down A until the message OFF
appears (flashing), which indicates the setting screen.
• A temperature value appears instead of OFF (factory calibration) if you previously calibrated the temperature sensor.
3. Press D to move the flashing in the sequence shown below.
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4.Press D to move the flashing to the unit setting you want to change (°C/°F or hPa[mb]/inHg).
5.Press E or B to select the unit you want.
6.Press A to return to the Barometer/Thermometer Mode screen.
Calibrating the Temperature Sensor
The temperature sensor of this watch is calibrated at the factory before shipment and further adjustment is normally not required. If you notice serious errors in the temperature readings produced by the watch, you can calibrate the sensor to correct the errors.
Important!
Incorrectly calibrating the temperature sensor can result in incorrect readings. Carefully read the following before doing anything.
•Compare the readings produced by the watch with those of another reliable and accurate thermometer.
•If adjustment 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.
To calibrate the temperature
1. Press C to enter the Barometer/ Thermometer Mode.
2. Hold down A until the message OFF appears (flashing), which indicates the setting screen.
• A temperature value appears instead of OFF (factory calibration) if you previously calibrated the temperature sensor.
3.Each press of E increases the displayed temperature by 0.1°C (or 0.2°F) while pressing B decreases it.
•Pressing B and E at the same time returns to the factory calibration (OFF).
•The indicator TEMP ADJ on the display indicates that the temperature value has been calibrated.
4.Press A to return to the Barometer/Thermometer Mode screen.
Calibrating the Barometric Pressure Sensor
The pressure sensor of this watch is calibrated at the factory before shipment and further adjustment is normally not required. If you notice serious errors in the barometric pressure readings produced by the watch, you can calibrate the sensor to correct the errors.
Important!
Incorrectly calibrating the barometric pressure sensor can result in incorrect readings. Before performing the calibration procedure, compare the readings produced by the watch with those of another reliable and accurate barometer.
To calibrate the barometric pressure
1. Press C to enter the Barometer/ Thermometer Mode.
2. Hold down A until the message OFF appears (flashing), which indicates the setting screen.
• A temperature value appears instead of OFF (factory calibration) if you previously calibrated the temperature sensor.
3.Press D to move the flashing to the barometric pressure calibration setting.
•At this time, OFF or the barometric pressure value should be flashing on the display.
4.Each press of E increases the displayed barometric pressure by 1 hPa/ mb (0.05 inHg), while pressing Bdecreases it.
•Pressing B and E at the same time returns to the factory calibration (OFF).
5.Press A to return to the Barometer/Thermometer Mode screen.
To change the Altitude Units
1. Press E to enter the Altimeter Mode.
2. Hold down A until the display clears. After four or five seconds, either OFF or the current reference altitude value (if set) will start to flash, which indicates the setting screen.
3.Press D three times to move the flashing to the altitude unit setting.
4.Press E or B to select the unit you want (m or ft).
5.Press A to return to the Altimeter Mode screen.
•Changing the altitude units automatically turns the altitude alarm off.
•Changing the altitude units automatically restarts the altitude graph.
•Performing the above procedure causes altitude values stored in memory also to be converted to the unit you select.