FORD 2012 F-550 v.2 - Manual (Page 27)

RESET FOR ZONE SETTING
This feature changes the compass zone setting.
Most geographic areas (zones) have a magnetic north compass point that
varies slightly from the northerly direction on maps. This variation is four
degrees between adjacent zones and will become noticeable as the
vehicle crosses multiple zones. A correct zone setting will eliminate this
error.
Refer to Compass zone/calibration adjustment.
ZONE <XX> RESET = CHANGE
The compass heading is displayed as one of N, NE, E, SE, S, SW, W and
NW in the message center display.
Refer to Compass zone/calibration adjustment.
RESET FOR CALIBRATION
This feature calibrates the compass.
The compass reading may be affected when you drive near large
buildings, bridges, power lines and powerful broadcast antenna. Magnetic
or metallic objects placed in, on or near the vehicle may also affect
compass accuracy. Usually, when something affects the compass
readings, the compass will correct itself after a few days of operating
your vehicle in normal conditions. If the compass still appears to be
inaccurate, a manual calibration may be necessary.
Refer to Compass zone/calibration adjustment.
Compass zone/calibration adjustment
1. Determine your magnetic zone by
referring to the zone map.
2. Turn ignition to the on position.
3. Start the engine.
4. From the SETUP menu, press and release the RESET button until the
message center display changes to show the current zone setting ZONE
<XX> RESET = CHANGE.
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Instrument Cluster
27
2012 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)