Vetta V100A Manual page 38

BAROMETRIC CALIBRATION
The V100A Altimeter may also be calibrated
by entering the current, local, barometric
pressure at sea level either in Inches of
Mercury (inHg) or in Millibars (mbar). To
access the barometric entry screens, press
Button #2 to bypass the Manual Altimeter
Elevation input screen (See point C above).
The letters "inHg" will then appear and start
to flash. If you wish to enter barometric
pressure in Inches of Mercury, press Button #1 to
select that unit of pressure and advance to the
inHg calibration screen. Use Button #2 to
advance the digits to the correct number and
press Button #1 to select and advance. When
all the digits for the inHg units have been
entered, press Button #1 to select that setting
and advance to the ALT/% screen.
If, however, you wish to enter barometric
pressure in Millibars (mbar), press Button #2
while "inHg" is flashing to scroll to the Millibars
calibration screen with the letters "mbar"
flashing. To enter the current pressure in
Millibars, press Button #1 to select that setting
and enter the digits as instructed above.
Note: Once you have set a barometric pressure
and selected it by pressing Button #1, the
computer will automatically convert the
pressure reading to an elevation (in feet or
meters) and exit Altimeter Calibration Setup
to the ALT/% screen.