Simrad FC40 Instructions

Instructions
FC40 Fluxgate Compass (P/N 22090245)
RC42 Rate Compass (P/N 22090237)

GENERAL

The FC40 and RC42 compasses are designed
for connection to the SimNet network. They
are equipped with 5,5 m (18 feet) of SimNet
cable with connector. The compasses transmit
the heading even if the autopilot is switched
off.

INSTALLATION

The compass can be mounted on deck or
bulkhead, athwart ship or along ship. Some of
the products connected to the SimNet network
may have a heading offset feature. This will
compensate for the mechanical offsets
resulting from the selected location and
orientation of the compass.
If the connected products have no offset
feature, the compass must be deck or
bulkhead mounted athwart ship with the cable
gland pointing aft.
Select a location that provides a solid
mounting place free from vibration, and as
close to the vessel's centre of roll and pitch as
possible, i.e. close to the water line. It should

ELECTRICAL CONNECTION

• Connect the compass to an available SimNet
connector in the SimNet "backbone".
• When used as "stand alone" compass,
connect an AT10 output on NMEA 0183
format, refer to drawing.

COMPASS CALIBRATION AND OFFSET ADJUSTMENT

There are two ways of calibrating the compass
depending on type of equipment to be
connected. If connected to SimNet, the
calibration and offset is carried out using the
autopilot or instrument calibration menu. Refer
to the autopilot or instrument manual.
Calibration data is stored in the compass and is
presented on the autopilot and instrument
display.
be as far as possible from disturbing magnetic
interference e.g. engines (min. 2 meters),
ignition cables, other large metal objects and
particularly the autopilot drive unit. On steel
hull boats it should be mounted 0.75-1 m
above the wheel house on a non magnetic
stand.
The compass face plate is the TOP. Never
mount it upside down! Level the sensor as
close to horizontal as possible.
Use the supplied mounting kit and drill holes
through the centre of the slots.
If connected to AT10 for NMEA0183 output
only, the calibration procedure will start
automatically if two consecutive turns of 360°
are made within 5 minutes after (SimNet)
power is applied.