Tokyo Keiki TG-8000 Series, Operator'S Manual

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3
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3.4.4 Operation procedure of master compass power switch (Option)
CAUTION
●
System selection (switching) may cause large change of the true heading. During the
automatic steering, once turn the steering mode of the automatic steering system to
"MANUAL" to prevent a large course changing, and after confirming surrounding safety
of own ship, turn to "AUTO" steering again.
CAUTION
●
DO NOT touch the master compass power switch while the gyrocompass runs
normally to prevent the sensitive element from serious damage which may cause
reducing the life time or unexpected trouble.
The master compass power switch must be operated only when the master compass is
in abnormal condition.
IF any failure occurred in the master compass as providing alerts coded [E3/E-A], or
unstable heading, turn OFF the master compass power supply switch located inside
the steering stand or the control unit to stop the operation of the master compass.
An external heading sensor connected backs-up the gyrocompass heading by
changing the heading sensor to keep transmitting the true heading information.
Heading information changeover is carried out as follows when the master compass is
in failure condition.
See the Figure 7.11 for the position of master compass power-off switch.
When any abnormal condition or failure occurs in the master compass, operate the
gyrocompass as follows.
(1) Operation procedure
1. See 3.4.2 System selection and change the heading output to external heading
sensor system(GNSS compass or magnetic compass).
2. Turn the master compass power switch optionally provided in the steering stand
or the control unit to OFF.
3. DO NOT turn the main power-on switch on the operation panel to OFF.
4. Although the alert code
「
3
」
or
「
A
」
will appear and be kept indicating, the output
with the external heading sensor selected will be transmitted and kept on.
(2) Return procedure
1. Turn once the steering mode of the steering control system to HAND.
2. Turn the compass power switch of the operation panel to OFF.
3. Turn the Master compass power switch located either in the steering stand or in
the control unit of the gyrocompass to ON.
4. Turn the power switch in the operation panel of the gyrocompass to ON.
5. Synchronize the repeater heading with the heading information provided from the
external heading sensor as selected in (1) changeover procedure.
6. Note that the changeover to the gyrocompass heading should be done in about
three hours after re-starting the gyrocompass.