Sensor Type MC2 and MC5 :
As written in the introduction, the sensors MC2 and MC5 are
applied for the stand alone compass systems. Both sensors
measure the earth magnetic field and are therefore sensitive to
magnetic disturbances. To minimize the deviations caused by
these disturbances, apply the following guide lines for
mounting the sensor :
- Minimum distance to steel, in all directions, depends on
proper operation of the system. Guide line is aprox. 1 meter.
- Mount in centerline of ship, between bow and stern.
Make sure the fore/aft mark is as parallel as possible to the
centerline between bow and stern, with 'fore' pointing to the
bow of the ship. This will prevent big A-adjusments by the
means of rotating the sensor.
- Not at same hight as communications and radar antenna's
- Horizontal (parallel) in reference to ships deck
When you have mounted the sensor according to the above
mentioned guide lines and the repeater has a 'nervous' heading
indication when the ship pitches and rolls, it indicates the
presence of a vertical magnetic field, which has to be
compensated. This can only be done when the sensor type
MC5 is applied.
When the sensor is mounted to high, it will certainly minimize
the magnetic disturbances, but at the same time it can introduce
a higher rate of wear down of the internal cardanic suspension,
as well as a 'nervous' heading indication of the repeater when
the ship pitches and rolls.
A special mouting bracket is delivered with the sensor.
The sensor can be mounted in a movable mast. Lowering down
the mast will not damage the sensor (if done with care).
However, the system will not indicate a proper heading if the
sensor is not in the upright position.
Visual difference between MC5 and MC2 sensor is that the MC5 has a
brass knob on top and the MC2 has a (smaller) red pvc knob.
Do not try or use any tools in attempt to turn or loosen these knobs.
BOTH ARE NOT INTENED FOR ADJUST PURPOSES !!!
7
xfiles\\tek\in11\doc\handleiding_in11b_eng.lwpp
status: definite date: 30-9-2002
