Magnetic Compass Calibration - C.Plath NAVIGAT X MK 1 Mod. 10 Operator's Manual

NAVIGAT X MK 1 Mod. 10 / SR-180 MK 1 Mod. 10
4.5

Magnetic Compass Calibration

Because the function of fluxgate sensors and electronic compasses is not exactly
linear, minor deviations may occur between the actual magnetic compass heading
and the heading data transmitted by these devices. The gyrocompass system will
automatically correct these deviations if a calibration table has been stored in the
system's memory and calibration is activated in the user setup.
4.5.1 Determining Correction Values
1) Check that magnetic compass calibration is set to "OFF" in the user setup
menu.
2) Check that the magnetic variation is set correctly in the manual settings
menu.
3) Select manual steering mode. Compare at regular intervals the difference
between the actual magnetic compass heading and the magnetic heading
displayed on the gyrocompass' display. It is recommended to cover the full
circle in steps of 10° (0°, 10°, ... , 350°).
4) Enter the observed display values in the magnetic compass calibration table
at the back of this manual.
5) Calculate the required correction value for each heading. The correction value
is the offset which must be applied to a given display value in order to obtain
the actual magnetic heading.
e.g.: The actual magnetic heading is 0°. The magnetic heading displayed on
. F1 GYRO 1 . . ....
. F2 GYRO 2 . . ....
>F3 MAGN.C . ....
. DIFF G1/G2 .
Note: The magnetic compass used as reference during the calibration procedure
must be properly installed and adjusted.
Use of the gyrocompass as a calibration reference (gyrocompass emula-
tion) is not permitted!
the gyrocompass' display is 0,8°. The required correction value is -0,8°.
0.0°
0.0°
0.8°
... 3.2°
N
W E
S
determine correction values
056310
3-149 MK110ENG.P65
magnetic hdg. display
correction
compass NAVIGAT X Mk 1 value
heading (uncalibrated)
0,8° -0,8°
0°
0,9°
10°
20°
Page 4-05