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Chapter 4: Calibration
4.1 Introduction
The ST60+ Compass instrument is set up with factory-programmed default
settings, so in order to optimize the performance of the instrument on board a
particular vessel, the procedures in this Chapter must be carried out immediately
after the completion of installation and before the equipment is used for
navigational purposes.
Where practicable, the calibration procedures are presented diagrammatically to
show the sequence of button presses and the resulting displays. If a parameter is
adjustable, adjustment instructions are given at the appropriate point on the
diagram.
4.2 User calibration
The User calibration procedures (see the
User calibration
flow chart) enable you
to carry out:
• Linearization and heading alignment.
• Locked heading display selection.
• Variation setting.
• True/Magnetic display selection.
Note:
User Calibration is possible only if it is enabled (default) in Dealer Calibration.
To carry out a User calibration:
1. Hold down the
disp and lock buttons together for approximately 2 seconds
to select the Calibration entry screen.
2. Use the
disp button to cycle from screen to screen and use the < and > but-
tons to set the required values at each screen.
Linearization
The Fluxgate Compass transducer must be linearized to compensate for
deviation. Linearization should be carried out in calm conditions, preferably in flat
water.
Note:
If linearization has already been performed, press the
disp
button momentarily to
bypass the linearization process and carry on to the Heading alignment screen without dis-
turbing the current deviation settings.
When the Linearization screen is first selected, the outer segments of the LCD
cycle to indicate that linearization has started.
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