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To calibrate the altimeter
1. In the Altimeter Mode, hold down A until the altitude value starts flashing on the display. 2. Each press of D increases the displayed altitude value by 5 m, while pressing B decreases it. Holding down either button changes the value at high speed. � If you have selected feet as your unit of measurement, the above operations change the reading by 20 ft. � You can calibrate the altitude within the range of 0 m to 4,000 m (or 0 ft. to 13,120 ft.). 3. After calibrating the altimeter, press A to return to the Altimeter Mode. � After you press A, the numbers on the display indicate that the watch is making internal adjustments. This operation takes about nine seconds. Once adjustments are finished, the altitude display appears.
Maximum Ascent/Maximum Descent
Pressing the A button in the Altitude Differential Mode while a measurement is in progress shows the maximum altitude reached (maximum ascent) during the current measurement. Press A again and the display changes to the maximum negative altitude reached (maximum descent). These values are calculated in relation to the start point (altitude zero) of the measurement.
Maximum Ascent Maximum Descent
Altitude Differential Display
� If you do not press a button for about six seconds while the maximum ascent or maximum descent value is shown, the display automatically returns to the altitude differential display.
ALTITUDE DIFFERENTIAL MODE
In the Altitude Differential mode, the watch displays the difference between a starting altitude and each subsequent measured altitude value. Differential data from the start of the measurement to the end is stored in memory. When you start a new measurement, the initial measurement is set as 0 (meters or feet). Each subsequent measurement is compared with zero, and the difference is shown on the display. Measurements are taken every three seconds.
About altitude differential memory management
You can store up to three sets of altitude data in memory. Once memory is full, the next set of data recorded causes the oldest set of data in memory to be deleted. Note that no data is stored in memory if the maximum ascent/maximum descent does not exceed ±15 meters (40 feet).
Memory 1 Memory 2 Memory 3
Mode indicator
� If you do not press any button for three hours in the Altitude Differential Mode, the display automatically returns to the Timekeeping Mode display. � The unit of measurement used in the Altitude Differential Mode is the same as that specified in the Altimeter Mode. To change this unit, use the procedure in �Switching between meters and feet�.
Newest data
Cleared from memory
The following table shows the data that makes up each set. Data Total Altitude Differential Maximum Ascent Maximum Descent Total Ascent Total Descent Description Differential between the end point and the starting point (altitude zero). Maximum differential between the end point and the starting point (altitude zero). Maximum negative differential between the end point and the starting point (altitude zero). Total of ascent values Total of descent values
Applications
� Measurement of the height of a building � Measurement of changes in altitude while hiking or mountain climbing
How measurements are taken
The Altitude Differential Mode can be used to measure total altitude differential and point-to-point differentials. To measure total altitude differential, start the operation and let the watch take automatic measurements every three seconds. In such a case, the display is updated every two measurements (six seconds), and the final value shown is the total altitude differential. For point-to-point altitude differential measurements, you press a button at the point up to which you want the differential measured and shown on the display.
Ascent 2 Descent 1
Maximum Ascent
End
Ascent 1
Start End Start
Point-to-point measurement Total measurement
Total Altitude Differential
Maximum Descent
Descent 2
Note � Before performing an Altitude Differential Mode measurement, make sure that the display shows �� � � � M� or �� � � � F�. If it doesn�t, hold down the D button in the Altitude Differential Mode until the above described display appears.
Total Ascent = Ascent 1 + Ascent 2 Total Descent = Descent 1 + Descent 2 � The measured data can be recalled and manually deleted in the Data Recall Mode.
To perform a total altitude differential measurement
Altitude differential
1. To start the measurement, hold down D until �M� or �F� appears flashing on the display. � Measurements start to be taken every three seconds. The display is updated every six seconds with the average value of the last two measurements. � The unit of measurement (�M� or �F�) flashes on the display while a measurement is in progress. � The display shows �FULL� if a measured value falls outside the measuring range. The normal display returns as soon as the pressure falls within the allowable range again.
DATA RECALL MODE
Mode indicator
Use the Data Recall Mode to recall and delete altitude differential data from memory. Whenever you enter the Data Recall Mode from another mode, the newest data is displayed first.
To recall data from memory
1. In the Data Recall Mode, press B to scroll through displays for altitude differential memory data sets 1, 2, and 3.
Memory number
2. To clear the displayed data and store it into memory, hold down D until the display shows �� � � � M� or �� � � � F�. � For details on the memory, see �About altitude differential memory management�.
[ Memory Number Display ] 2. While any one of the memory data set displays is shown, press D to scroll through the data contained in that set in the following sequence.
To perform a point-to-point differential measurement
1. To start the measurement, hold down D until �M� or �F� appears flashing on the display. 2. When you reach the point up to which you want to measure the altitude differential, press B. The altitude differential from your starting point (altitude zero) and your current position flashes on the display for about six seconds. � After six seconds, the display returns to the normal altitude differential display. 3. Repeat step 2 as many times as you like. � When you repeat step 2, remember that the resulting value is not the difference between your starting point and your current position, but rather between the point where you last pressed B and your current position. 4. To clear the displayed data and store it into memory, hold down D until the display shows �� � � � M� or �� � � � F�. � For details on the memory, see �About altitude differential memory management�.
