Changing Barometric Setting - Garmin G500 Pilot's Manual

2.4.3

Changing Barometric Setting

The Barometric Setting affects the altitude values shown on the PFD.
Barometric pressure units may be displayed as either inches (in) or hectopascals
(hpa). For more details, refer to System Display Units in section 3.
1. Press the BARO key to activate Baro mode.
2. Turn the PFD knob to increase or decrease the altimeter setting.
OR
3. Press the PFD knob while in Baro mode to toggle between Standard Pressure
(29.92 in) and the currently selected barometric setting.
Baro-Corrected Altitude Versus GPS-MSL Altitude
Baro-corrected altitude (or indicated altitude) is derived by adjusting the
altimeter setting for local atmospheric conditions. The most accurate baro-
corrected altitude can be achieved by frequently updating the altimeter setting
to the nearest reporting station along the flight path. However, because actual
atmospheric conditions seldom match the standard conditions defined by the
International Standard Atmosphere (ISA) model (where pressure, temperature,
and lapse rates have fixed values), it is common for the baro-corrected altitude
(as read from the altimeter) to differ from the GPS-MSL altitude. This variation
results in the aircraft' s true altitude differing from the baro-corrected altitude.
190-00601-02 Rev. J
PFD Knob Selected
Baro Setting
Figure 2-23 Barometric Setting
Garmin G500/G600 Pilot's Guide
TOC
Baro Setting shown
in Altimeter window
Cover
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