Solid State Heading Sensor (SSHS) Owner’s Manual
10
Automatic Power-Up Deviation Calibration
Automatic Power-Up Deviation Calibration is accomplished by turning the vessel through four
complete circles within 10 minutes of re-supplying power to the compass (see Step 5).
Tip:
This method should be used in calm, flat waters where there is no set or drift
associated with current or wind.
The procedure is as follows:
1. Ensure that the compass has been properly installed (see
Page 6
).
2. Turn on power to the sensor and wait one minute while it initializes and sets.
3. Turn the vessel in either direction until you complete a full 360° turn in 1½-2½ minutes
or fewer (try to keep your turn over 1½ minutes for a complete circle).
4. While continuing to turn the vessel as indicated in Step 3, remove the power to the
compass, and re-supply power. This initiates deviation calibration.
5. Continue turning the vessel through four complete circles in fewer than 10 minutes from
the time power was re-applied.
6. Verify that the SSHS successfully completed deviation calibration by comparing the
compass’s readings to three or more known headings. One way to verify that the SSHS
successfully completed a deviation calibration is to observe three or more Course Over
Ground (COG) readings directly from your GPS device or through your Nobeltec
Navigation Software, and compare them to the corresponding SSHS heading readings.
If the SSHS readings agree with the COG readings (or are off by a consistent amount), then
the SSHS was in all likelihood successfully calibrated. This method assumes that the vessel’s
actual heading closely resembles the COG.
Tip:
While turning the vessel, try to maintain a circle by holding the rudder at a
constant angle, minimizing the vessel’s pitch and roll by calibrating on calm, flat
water.
Installation-Offset Correction
After installation and successful
Magnetic Deviation Calibration
, it is important to perform
Installation-Offset Correction
using your NMEA 0183 or 2000 interface to verify that the
displayed compass heading, pitch, and roll match actual vessel heading, pitch, and roll.
Users with direct access to NMEA 0183 (see
Appendix A
) and / or NMEA 2000 (see
Appendix B
) interfaces can perform Installation-Offset Correction directly through those
interfaces. These direct-access methods provide an indication of success or failure and the
causes of failure, when applicable.
Note:
Jeppesen Marine does not provide technical support for the NMEA 2000
interface as of this printing.
Summary of Contents for Nobeltec Solid State Heading Sensor
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