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

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8. Check if all NAVIGAT X MK 1 gyrocompass system components are
correctly grounded according to the standard or project specific con-
nection drawings.
9. Check if the inner cable screens are connected to system ground of
interfacing equipment.
10. Check if the cooling fan (ventilator) at the rear side of the compass
housing is clean and blowing into the housing (airstream inwards).
11. Check if the cooling fan (ventilator) inlet grill is clean and free of dirt.
⇒
In case a step of the check procedure is not met as required, mend
the relevant installation condition to meet the requirements.
⇒
If all steps of the electrical installation check procedure are met as
required, proceed with the ”Environmental Conditions Check Proce-
dure”.
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1. Check if ambient temperature at install place is within preferred
range (20° C ± 10° C; 68° F ± 14° F).
2. Check if the Installation room is air conditioned.
3. Check if reasonable vibration levels at place of installation are kept.
4. Check if the Gyrocompass is NOT installed in engine room or other
ships place with extensive vibration / resonance frequencies.
5. Check if all electromagnetic compatibility requirements and dis-
tances are kept at place of installation.
6. Check if interference by other electronic devices surrounding the
gyrocompass, can be eleminated.
7. Check if no wiring of other electronic devices is running across or
close the gyrocompass housing.
⇒
In case a step of the check procedure is not met as required, mend
the relevant installation condition to meet the requirements.
⇒
If all steps of the electrical installation check procedure are met as
required, proceed with the ”System Configuration Check Proce-
dure”.
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1. Energize the system and wait until the startup message is displayed
and the initial self test is successfully executed.
2. Go to the Service Setup 1, ”Configuration Menu - Service Setup 1”
on page 8-1.
3. Check if the system type and heading reference selection settings
are set to the required values of the gyrocompass system installed.
4. Check if the data formats for all devices connected to the data inputs
are set as required:
– In G or GG type systems, check whether, the magnetic compass
heading input is disabled.