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The antenna’s internal compass sensor is
calibrated at the factory for a perfect-world
environment. However, hard and soft iron effects
on your vessel can distort the magnetic field
around the antenna, causing errors in the
sensor’s reported heading. To compensate for
these magnetic distortions, follow these steps to
calibrate the internal sensor.
Turn On Autocalibration
Follow these steps to turn on the system’s
Autocalibration function. The Autocalibration
function will allow the sensor to calibrate itself
automatically.
a. Press the center MENU button on the MCU
to access the onscreen menu (see Figure 27).
b. At “Install Satellite?”, press NEXT until the
display shows “Operations Mode?” Then
press YES.
c. At “Get Antenna Status?”, press NEXT until
the display shows “Control Compass?” Then
press YES.
d. At “Set Autocal on/off?”, press YES.
e. At “Autocal is: OFF”, press ON.
f. At “Autocal is: ON”, press RETURN.
Run the Autocalibration Function
Follow these steps to steer the vessel through a
complete circle to ensure the Autocalibration
function effectively calibrates the sensor.
NOTE: If the antenna is installed on a large vessel,
such as a tanker or cargo ship, you may omit this step.
Simply leave the Autocalibration function set to ON.
a. Select a calm day and navigate the vessel to a
clear area. Excessive pitching and rolling can
distort calibration data.
b. Apply power to the TracVision system.
c. Just before you begin, note the vessel’s
heading.
Install Satellite?
Yes Next Return
Control compass?
Yes Next Return
Menu
Set Autocal on/off?
Yes Next Return
Autocal is: OFF
On Return Off
Until “Operations Mode” shown
Autocal is: ON
On Return Off
Operations Mode?
Yes Next Return
Get Antenna Status?
Yes Next Return
Until “Control Compass” shown
Figure 27: Turning On Autocalibration at the MCU
Calibrate the Internal Sensor
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