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ProMARK X
USING THE UNIT NEAR THE POLES
Since all meridians of longitude converge at the North and South poles, any
distance measurement can span many degrees of longitude near the poles.
This means that small changes in position can cause large variations in
position.
The inherent accuracy of the ProMARK X does not change near the poles, but
this mathematical sensitivity problem can cause position and velocity-related
data to appear unstable when the unit is operated at latitudes greater than
85° north or south of the equator. Use caution in interpreting displayed data
in these areas.
STORING THE UNIT
Use the instructions below to store the unit.
• Use AUX 5 to transfer all data files, attribute files, almanac,
user grids, and datums to a PC.
• Record any non-default parameters from SETUP, or transfer the
SETUP file to a PC.
• Set Battery Saver to ON. Should the ON/OFF key be pressed
inadvertently, this will prevent the batteries from being run
down.
• Place the unit in the carrying/storage case or in its original box.
• If the unit is stored in the carrying/storage case, place the field
card in the front pocket, to be sure no keys are accidentally
pressed.
When the unit is taken out of storage, re-initialize the unit and re-enter
non-default SETUP parameters, or upload parameters from a PC. Also
upload any necessary data files.
WHEN NOTHING ELSE WORKS
When nothing described in Operating Problems solves your problem, you
can try clearing the unit's memory by pressing AUX 11 and select ALL to clear
memory. This is a last-ditch solution, since all of the unit's memory will be
cleared. Be sure to record your waypoints and any non-default SETUP
features before clearing the memory.
In extreme cases, such as when the display is frozen and the keypad will not
work, remove the battery clip for at least 1/2 hour. This will also erase the
memory.
Troubleshooting & Operating Tips
8-15
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