GE MapSight User Manual page 23

Compass calibration
Once you have fully charged your MapSight unit we recommend that you calibrate the compass to
fine-tune the compass for your local operating area.
The 'Calibrate Compass' utility guides the user through an in-field compass calibration process. A
video showing this process can be found at http://www.youtube.com/watch?v=KzxRBk9EjhI.
Why you should calibrate
Your MapSight will naturally pick up a magnetic signature over time that may affect the accuracy of
the internal digital compass.
To maintain optimum performance, a Compass Calibration application is provided on your MapSight
that will guide you through the steps required to measure and compensate for this magnetic
signature.
When you should calibrate
You should recalibrate the compass when you first use the device and whenever your MapSight has
travelled a long distance (e.g. plane flights or shipping to a new location). To ensure the highest
possible compass accuracy, it is recommended that the MapSight be calibrated at least once per
month.
Where you should calibrate
The Compass Calibration application should be used in a clean magnetic free environment. This
means:
Keep away from large metal objects (e.g. cars, steel poles, desk frames, filing cabinets etc.).
•
Avoid wearing metallic objects (e.g. large metal watches etc.).
•
• Keep clear of electric wires, transformers, and other electronic devices that may generate a
magnetic field.
In general, for any metallic object, position the MapSight unit at least twice its longest
•
dimension away from the object (e.g. keep at least twice the distance of the length of a 3 meter
car, approximately 6 meter. Smaller metal objects have significant less impact).
Keep other magnetic objects away (e.g. sighting compasses / magnetic toys etc.).
•
The calibration may be performed indoors, but be aware of the cautions above. The ideal location to
perform the operation would be in the middle of a field away from any man-made structures.
MapSight U ser M anual
MS-101-14-12-34.0
Page 1 9 www.gemapsight.com/support