Zone Variation
The compass must be set to compensate for the variation between true north and magnetic north. To set variation:
• Turn ignition on.
• Using the map to find your geographic location, note the zone that you are in.
• To select Zone, push in the Comp switch for 3 seconds until the Zone selection comes up. Release, then toggle until correct zone is found and release switch. After 5 seconds of no switch activity, display will return to normal reading.
Found a zone map here:
http://www.mitocorp.com/images/mirrop1.jpg
Compass Calibration
This compass automatically calibrates itself while the vehicle is driven as your route takes you in complete circles. Therefore no calibration should be required, though it may take up to an hour. A quicker method is listed below. If the vehicle's compass headings become inaccurate, the compass can be manually calibrated by:
• Turn ignition on.
• Zone variation needs to be changed to use in different areas of the country.
• For a different Zone selection, push in the Comp switch for 3 seconds until the Zone selection comes up. Release, then toggle until correct zone is found and release switch.
• To re-calibrate, hold the Comp switch for 6 seconds until a "C" is displayed. Drive your vehicle in at least 3 circles, allowing 45 seconds to complete one circle.