Instruction manual, SPT and MPT 31x series transponders

SPT and MPT 31x series
Compass transponders
All compasses can perform well in a controlled environment,
where the ambient magnetic field consists solely of the earth’s
field. In most practical applications, however, an electronic
compass module is mounted in a host system that can contain
large sources of local magnetic fields.
By performing the calibration procedure, you allow the compass
to identify the major sources of these local magnetic anomalies
and subsequently cancel out their effects when measuring the
earth’s magnetic field for computing compass headings.
Note
The compass has to be in the same position / conditions in
calibration and operation mode. Different positions will result
in varying accuracy. The calibration is performed at the HPR /
HiPAP system. Refer to the System operator manual / APOS online
help for the calibration procedure.
Transducer handling
At transportation and storage, the transducer face and the O-ring
grooves must be protected.
As a precaution at storage, short-circuit the electrical wires. This
prevents unpleasant voltages, which otherwise may appear from
temperature variations.
Source level adjustment
For certain applications, you may require to adjust the source
level. This is done at the HPR / HiPAP system. For information
on how to adjust the source level, refer to the System operator
manual / APOS on-line help.
Octans module
Caution
The Octans unit is a sealed unit and must not be
opened. If the unit is not working as expected, contact
Kongsberg Maritime.
80 160820/O