Pre-Ride Altimeter Calibration Setup - Vetta V100A Manual

PRE-RIDE ALTIMETER CALIBRATION
SETUP
INTRODUCTION
Before any new ride, the V100A Altimeter must be recalibrated so
that it "knows" the correct starting elevation. Because elevation is
calculated via barometric pressure, changes in barometric
pressure detected by the sensor change the elevation displayed
on the ALT/% screen. Barometric pressure falls as elevation
increases and rises as elevation decreases.
To ensure the accuracy of altitude data, recalibration of the
V100A Altimeter is accomplished in two ways: A) By entering a
known elevation for a current location or B) By entering the
current, local barometric pressure at sea level for that moment in
time. A known elevation reading can be A) Recalled from either of
2 elevations stored in Altimeter Memory 1 and 2, or B) Entered
manually, based on a current location in feet or meters. Or, the
user may find out the current local barometric pressure reading
from a local airport, weather service bureau or online from an
internet source such as www.noaa.com or yahoo weather at
www.yahoo.com.