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Revision 1.8 Appendix B – NMEA 2000
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Interfacing Page B5
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SSC200 NMEA 2000
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Initiated Deviation Calibration
NMEA 2000
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initiated deviation calibration is accomplished by turning the vessel through at
least 3 complete circles after the SSC200 receives a Maretron proprietary NMEA 2000
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PGN.
The procedure is as follows:
1. Ensure that the compass has been properly installed per Section 2,
2. Warm up the compass by operating it for approximately 10 minutes,
3. Turn the vessel (either direction) such that you complete a full 360° turn in 2½ minutes
or less (try not to go below 1 minute for a complete circle),
4. Send the following NMEA 2000
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PGN to the SSC200 while continuing to turn the
vessel:
PGN 126208 – NMEA Command Group Function – Maretron Proprietary Reset.
This will initiate a reset and force the SSC200 to start the calibration process (see page
B3 for complete description of PGN 126208).
5. Continue turning the vessel through at least 3 circles until you see one of the following
Maretron proprietary NMEA 2000
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PGNs:
a. PGN 126270 – Maretron Proprietary Slave Response – Deviation Calibration
Successfully Completed. This indicates successful completion of the deviation
calibration process (see page B2 for complete description of PGN 126270).
b. PGN 126270 – Maretron Proprietary Slave Response – Deviation Calibration
Failed to Complete. This indicates a failure of the deviation calibration process
(see page B2 for complete description of PGN 126270).
SSC200 NMEA 2000
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Installation-Offset Correction
Installation-offset correction can be performed by sending a Maretron proprietary NMEA 2000
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PGN to the SSC200. The procedure is as follows:
1. Make sure the vessel is laying in flat water on a known heading,
2. Send the following NMEA 2000
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PGN to the SSC200:
a. PGN 126208 – NMEA Command Group Function – Maretron Proprietary
Installation Offset. This PGN performs the installation offset of the compass. It
sets the roll and pitch outputs to zero at the compass’ current orientation and
sets the heading reading for the current orientation to the value given by the PGN
(see page B2 for a complete description of PGN 126270).