Rand McNally Foris
TM
User Manual
33
16. Troubleshooting
Problem Possible
cause
Solution
Navigation device does
not start up
Battery too low
Connect the device to a suitable power
source or replace the batteries.
If the device is not being used for a
prolonged period, switch it off entirely.
Press the power button and tap on
"Switch off".
No GPS reception / GPS
reception is interrupted
GPS reception may be interfered with in
forests, when you are surrounded by tall
buildings, where there is heavy cloud
cover etc.
Reposition the navigation device if
necessary. At least 4 satellites are
required for navigation. This information
can be viewed on the device under
"Settings" > "System / General" > "GPS
Info".
Device no longer
responds
Occasionally, responding reset may be
required.
Carry out a hard reset by holding down
the power button for around 3 seconds.
The device then switches off entirely.
Compass does not align
itself correctly
The compass should be regularly
calibrated
Recalibrate the compass.
There may be magnetic interference
nearby.
Make sure that there are no sources of
interference such as magnets, large
metal objects such as vehicles or
running engines, or high-voltage power
lines close by.
Altitude values are not
correct
The barometer should be regularly
calibrated
When there are breaks in the weather or
you experience great gains or losses of
altitude, you should calibrate the
barometer several times a day.
The track includes
jumps in altitude
The barometer was not calibrated prior
to the start of the track recording.
It is recommended that you calibrate the
barometer manually, by entering an
altitude, in particular before recording a
track.
Summary of Contents for Foris 850
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