NAVIGAT X Mk 2
056341 Rev. AA
4: Preventive Maintenance
Page 4-1
4 Preventive Maintenance
4.1 Maintenance Specifications
The gyrosphere is the only component of the NAVIGAT X Mk 2 which requires
regular maintenance.
Except for the removal of the complete gyroshpere container to protect it from
low ambient temperatures, any maintenance or service work on the compass
system is to be carried out by authorized service personnel only.
4.1.1
Gyrosphere Maintenance
Sperry Marine recommends to have a regular gyroshpere maintenance carried
out by authorized service personnel every 18 months. During the 18-month
maintenance, the gyrosphere and the inner surface of the container are cleaned
and all fluids are renewed. If necessary, the centering pin is exchanged.
4.1.2
Five-Year Maintenance
To ensure continued trouble-free operation and to minimize the risk of failure,
Sperry Marine recommends that every five years, the gyrosphere and the
centering pin are exchanged by authorized service personnel.
4.1.3
System Software Updates
Sperry Marine may occasionally provide new software releases, to enhance the
capabilities of the equipment or to apply bugfixes. The NAVIGAT X Mk 2 sys-
tem software can be updated in the field by exchanging the flash-memory chip
on the main PCB.
Note
If more than 18 months have passed since the last gyrosphere maintenance, a
reminder message is displayed every time the gyrocompass is powered up.
This message indicates no malfunction but is intended to remind the operator
that the recommended maintenance interval has been exceeded.
When the reminder message is acknowledged, the gyrocompass will power-up
and commence normal operation. During the gyrosphere maintenance, the gy-
rosphere operation time counter is reset.
Note
The five-year exchange interval for the gyrosphere is to be regarded as a rec-
ommendation only. Under normal conditions, the gyrosphere is able to operate
flawlessly over a considerably longer period of time.
Note
Only authorized service personnel may perform system software updates.
It is generally not required to update the software in existing installations, as
these will mostly not benefit from the added functionality.
In case of important software bugfixes, Sperry Marine will issue a service bulle-
tin to inform the owners of the respective equipment.
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