Installing a Magnetic Sensor Unit (Fluxgate)
The compass unit should be treated carefully as the internal gimbals can be
broken if dropped. Remove any internal packing before use.
The position of this compass is the most important item in the installation of the
autopilot. Good course holding depends on the compass being free from magnetic
interference.
As this compass has no moving card, it is not necessary for the compass to be
mounted low in the vessel. This is usually a place of high magnetic interference
and should be avoided. However, a position of severe roll such as the top of a
mast should also be avoided.
The compass need not be mounted in a weatherproof position. The compass can
be mounted on top of a flat surface, on a bulkhead or from the deck head. Check
other side of bulkhead for materials, which may cause magnetic interference.
Interference from any iron or steel can cause malfunction of the compass unit. To
prevent this occurring a minimum distance of 1 meter (3 feet) should be kept from
any steel or other ferromagnetic materials. This includes speakers and radios with
internal speakers.
Fasten the compass bracket with non-magnetic scr
ews. The compass must be
mounted in a near vertical position. See also the diagram labelled
compass
installation
.
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