TMQ AP55 Display Head, Operation And Installation

Page: 20 / 33

TMQ AP55 Display Head Page 20 Ver1.0 08/12/2005
NOTE: The calibration should only be done if the compass is
known to be inaccurate when compared to a chart
bearing.
If the AP55 Display Head shows a compass heading with a
constant
offset when compared to a correctly calibrated ships compass (eg: the
autopilot compass reads 3 degrees high on all headings), simply rotate
the Autopilot compass sensor to align the displayed headings with the
ships compass. It is
not necessary to re-calibrate the compass as
described below.
If the Autopilot has inconsistent variation on different headings, the
following calibration procedure can be carried out.
This procedure
should only be done in calm waters with adequate sea room. Auto
must not be selected to carry out the calibration.
1.
Using the AP55 Display Head, Press the MODE button 8 times to
enter the compass calibrate mode “CCAL”
2.
Press the < > buttons simultaneously to start the compass
calibrate. The Display will change to “StrC”
3.
Start turning the vessel slowly in one direction. Turn vessel
slowly through two complete circles from this point. Each
complete turn should take at least 60 seconds.
4.
On completion of circles, press the < > buttons together to store
the calibration setting into memory.
Check alignment of the Autopilot compass by steering the vessel due
North (000 on ships compass) and, if necessary, rotate the compass
sensor until display reads 000.