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

Page: 132 / 192

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`^rqflk Risk of inadequate correction values
Any wrongful or not instructed adjustment of the temperature and gyro-
sphere correction values will falsify a correct identification of the
NAVIGAT X MK 1 system‘s operating conditions.
Only authorized service personnel is allowed to change the temperature
and gyrosphere current correction values.
Never alter the correction values unless specifically instructed by Sperry
Marine.
Sets the correction values for the on-board temperature and gyrosphere
current measurement.
Settings: qbjmbo^qrob
Temperature correction value.
Adjusts the measured value of the actual temperature inside
the compass housing.
Default value is + 00° C (= no correction).
Correction range is - 99 – + 99° C.
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Gain factor for the gyrosphere current.
Default value is 1.000 (= no correction).
Correction range is 0.000 – 9.999.
The current gain factor adjusts the reading value of the
gyrosphere current, which can be indicated and controlled
in the Service Setup 2 (code 610) menu, see the ‘GYRO-
SPHERE DATA” submenu in the
‘Service Info Menu - Service Setup 2” on 8-22.
The current gain factor needs to become adjusted by
authorized service personnel only to match deviations of the
reading value indicated at the CDU and the measured gyro-
sphere current value (true RMS) as described in the
”Power-up Function Test” on page 5-9.
If deviant gyrosphere current values are found, the gyro-
sphere current gain factor needs to become readjusted by
authorized service personnel and double checked as long as
the indicated and measured (true RMS) gyrosphere current
values are sufficiently matched.
⇒
After successful matching of the both values, note the
exact value of the gyrosphere current gain factor in the
appended setup tables.
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The temperature and gyrosphere current gain correction values are set
to neutral (= no correction) values by default and are not to be altered by
the operator.
However, in case the correction values have previously been set by
authorized service personnel and the system software is exchanged
afterwards, the set values will be lost and must be re-entered manually,
as the correction values are always specific to the respective master PCB.