SUUNTO Vector HR - Manual (Page 44)

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note: the absolute pressure is depending on current altitude and weather.
5.1 PRessuRe dIffeRenCe MeasuReMenT sub Mode
the pressure difference is not referring to the sea level pressure, but to the current barometric pressure measured by the watch.
In the Barometer mode, press the [select] button once to enter this sub mode.
In the Pressure Difference Measurement sub mode (Fig. 46):
• field  displays the change in temperature.
• field  displays the change in atmospheric pressure.
• field 3 displays the current time, to the left of the time is the text “differ”.
• the outer circumference graphically displays the change in pressure where one full circle equals 00 mbars or  inHg.
this mode does continue in the background and allows the user to move to other modes and at the user’s convenience return to this
sub mode to view the current reading.
5.1.1 How to start the Pressure 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. 47).
2. PRESS the [Mode] button to accept the flashing zero and start the difference measurement.
If the user does not desire to begin the difference measurement, press either the [+] or the [-] button to toggle to the current barometric
pressure reading, then press the [mode] button to exit the setup program.
note: If the user does not press any button for 1 minute in the setup mode, the display will automatically exit setup.
5.2 4-day MeMoRy sub Mode
In the Barometer mode, press the [select] button twice to enter this sub mode. this sub mode allows the user to follow changes in
pressure over the past 4 days, making weather conditions forecasting possible.
In the 4-day memory mode (Fig. 48):
• Field 1 displays the day of the week the user is in;