Sperry Marine 4914-CA, Руководство по эксплуатации, установке и обслуживанию

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`^rqflk Risk of malfunction through wrong wiring
Wrong wiring, especially as running wires from one side of the compass
housing to the other or across the master PCB will cause malfunction.
Always use the cable inlets on both sides of the compass housing for
accurate wiring and keep all wires running inside the housing as short as
possible.
Always avoid to run wires from one side of the compass housing across
to the other.
`^rqflk Risk of earth faults
Wrong wiring of the cable shields makes the cables act as antennas
resulting in earth faults.
Always make sure to correctly draw back the cable shields and fasten the
cables to avoid earth faults.
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In case of earth faults, it is recommended to always check first the cable
wiring for correctly connected cable shields.
`^rqflk Risk of ROT filter malfunction
The selected ROT filter setting in the manual settings menu needs addi-
tional activation to gain ROT filter functionality
For activating the ROT filter setting in the service setup 1, it is mandatory
to pre-install a wire link at the master PCB TB2 19/20.
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To make sure, that the ROT damping time constant setting for the ana-
logue ROT output becomes effective, check if the mandatory wire link
between the master PCB TB2 19/20 is correctly installed.
`^rqflk Risk of damage through aggressive cleaning agents
Do not clean the compass with organic solvents, acetone or any other
substance which could damage or discolour plastic.
Only use water and soap or a mild detergent to clean the compass.
`^rqflk Risk of damage through overheating
A polluted or clogged air inlet grill located at the back side of the compass
housing will decrease the functionality of the fan and cause overheating
of the gyrocompass.
Always maintain the required distances around the compass housing to
enable sufficient air supply and full fan functionality.
Make sure to regularly clean the air inlet grill from dust and dirt and check
the fan functionality to avoid overheating.
`^rqflk Risk of defective gyrosphere
The gyrosphere may not be in operable working condition, if after a time
period of around 45 minutes after power-up the gyrosphere current has
not dropped below 320 mA.
If a visual inspection reveals no obvious cause of malfunction, the power-
up cycle of the gyrosphere must be completely repeated.
If after a time period of around 45 minutes after the second power-up
cycle the gyrosphere current has still not dropped below 320 mA, the
gyrosphere may not be in operable working condition.
Contact the Sperry Marine Service for advice.