Sperry Marine 4914-CA, Operation, Installation And Service Manual

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The permitted ambient temperature for the operation of the gyrocom-
pass system is from - 10° C to + 55° C.
When the ambient temperature at the gyrocompass' location falls below
- 10° C while the compass is in operation or when the ambient tempera-
ture falls below 0° C while the compass is not in operation, the gyro-
sphere container must be removed from the compass housing and
stored in a place where the ambient temperature will not fall below 0° C.
Removal and storage of the container as a whole (with the gyrosphere
installed), as well as later re-installation of the container may be carried
out by shipboard personnel; see “Removing the Gyrosphere Container
from the Compass Housing” on page 5-3 and “Installing the Gyrosphere
Container in the Compass Housing” on page 6 for details.
Always be aware, that in case no storage place is available where the
ambient temperature will not fall below 0° C, the gyrosphere must be
removed by authorized service personnel from the gyrosphere con-
tainer to prevent possible damage by frozen supporting fluid.
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Risk of damage/destruction through low temperatures
The supporting fluid in the gyrosphere container will start freezing at
temperatures below 0° C.
The NAVIGAT X MK 1 must no longer be operated when the ambient tem-
perature at the gyrocompass’ location falls below - 10° C while the com-
pass is in operation or when the ambient temperature falls below 0° C
while the gyrocompass is not in operation.
Always make sure, that the ambient temperature is higher than 0° C
respective 10° C. If this is not possible, the gyrosphere container with the
gyrosphere must be removed from the NAVIGAT X MK 1 and transported
to a place with sufficient ambient temperature.
Make sure to remove the gyrosphere from the gyrosphere container if no
place with sufficient ambient temperature is available to eliminate dam-
age from freezing supporting fluid. The removal is to be executed in a
service work procedure by authorized service personnel only.
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Risk of damage through unauthorized service
Only authorized service personnel is allowed to remove the gyrosphere
from the gyrosphere container.
Always keep to the mandatory safety requirements and the correct serv-
ice work procedure to remove the gyrosphere from the gyrosphere con-
tainer.