SUUNTO Vector HR - Manual (Page 37)

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note: a 10 minute recording interval means that the Wristop computer records data every 10 minutes.
4.2 alTITude dIffeRenCe MeasuReMenT sub Mode
In the altimeter mode, press the [select] button once to enter this sub mode.
In the Altitude Difference measurement mode (Fig. 25):
• Field 1 displays the vertical ascent or descent rate;
• Field 2 displays the current altitude in increments of 5 meters or 10 feet depending on the unit of measure selected; and
• Field 3 displays the running time; to the left of the time is the text “differ”.
• the outer circumference graphically displays the altitude in hundreds of meters or feet over a full thousand where one complete
circle is equivalent to 000.
The running time is displayed up to 39 hours and 59 minutes; after which three dashes (-:--) appear on the display in Field 3. If the user
allows the difference measurement sub mode to remain on visual display continuously for  hours, Wristop computer will after this
period automatically return to the main time mode.
this mode does continue in the background and allows the user to move to other modes. the user can return to this sub mode to view
the current status at his/her convenience.
note: the difference measurement mode is a relative measurement. any change in the reference altitude during the altitude difference
measurement will effect the measured altitude. We recommend that the reference altitude always be checked and set again prior to
beginning a new measurement.
4.2.1 How to start the altitude difference Measurement
1. PRESS the [Select] button and hold in for 2 seconds. Located in Field 1 is the text “SET”; located in Field 2, zero will begin to flash
(fig. 6).
2. PRESS the [Mode] button to accept the flashing zero and start the difference measurement.
If the user does not want to set the altitude difference to zero to restart the difference measurement, press either the [+] or the [-]
button to return to the original altitude difference reading and then press the [mode] button to validate that reading.
note: If the user does not press any button for 1 minute in the setup mode, the display will return to the main mode without zeroing
the altimeter.