Copyright © 2015 Maretron, LLP All Rights Reserved
9014 N. 23rd Ave #10
Maretron Manual Part #: M000401
Minor editorial changes.
Corrected default rate for Rate of Turn PGN under Technical Specifications.
Minor editorial changes.
Removed Warranty Card.
Changed copyright to 2005.
Added text to describe new feature (programmable variation) under Section 1.2, 3.0, 3.3, and Appendix B.
Added Variation section.
Added Rate of Turn section.
Updated Appendix A Maretron Proprietary Execute Sentence definitions.
Updated Appendix A Maretron Proprietary Set Period sentence table.
Added programming examples to Appendix A Maretron Proprietary Set Period for enabling, disabling, and changing frequency of transmission of different NMEA 0183 sentences.
Added Calibration Warning
Added Firmware Revision section indicating firmware revision 1.9
Added note to Appendix A that checksums are optional and removed checksums from received sentences.
Added deviation compass environment quality measurements report from compass.
Added rate of turn zeroing section.
Updated Supported Firmware Revision to 2.0.
Incorporated instructions on interfacing directly to a PC as Appendix C
Incorporated Magnetic Variation App Note (AN2) as Appendix D
Incorporated HDT App Note (AN1) as Appendix E
Added support for 38400 baud rate for P/N M000021 compasses.
Updated Section 3.1.2 describing compass output after successful deviation.
Updated installation to include power connections through NMEA 2000 port
Updated installation – SSC200 can be installed upside down and/or backward
Corrected order of parameters in $PMAREXE,ATT sentence description
Added cautions about using red Loctite and acetone cleaners
Updated “Unpacking the Box” items list
Added Appendix F on changing the NMEA0183 identifier
Clarified usage of PMARSETPX vs. PMARSETP sentences
Added NMEA0183 sentence to cause SSC200 to retransmit last calibration status message
Editorial note in NMEA 0183 connections about consulting manufacturer of connected products for connection information
Added length of NMEA 0183 cable (10m)
Added documentation on NMEA 0183 Installation Orientation command to Appendix A
Added text saying rate of turn zeroing should be carried out before magnetic deviation calibration
Table of Contents
Table of Figures
Table of Appendices
Appendix A – NMEA 0183 Interfacing............................................................................................... A1
Appendix B – NMEA 2000® Interfacing............................................................................................. B1
Appendix C – Connecting to a PC Via NMEA 0183....................................................................... C1
Appendix D – Configuring the SSC200 to Transmit True Heading Data.................................... D1
Appendix E – Configuring the SSC200 to Transmit the HDT Sentence for …and Radars..... E1
Congratulations on your purchase of the Maretron SSC200 Solid State Rate/Gyro Compass. Maretron has designed and built your compass to the highest standards for years of reliable, dependable, and accurate service.
The SSC200 detects the direction of the earth’s magnetic field using solid state magnetometers and indicates the vessel heading relative to magnetic north. In addition, the SSC200 incorporates solid state accelerometers and a solid state angular rate sensor for indicating the vessel’s attitude (pitch and roll) and rate of turn.
The Maretron SSC200 is designed to operate within the harsh demands of the marine environment. However, no piece of marine electronic equipment can function properly unless installed, calibrated, and maintained in the correct manner. Please read carefully and follow these instructions for installation, calibration, and usage of the Maretron SSC200 in order to ensure optimal performance.
This manual corresponds to SSC200 firmware revision 2.0.
The Maretron SSC200 Solid State Compass has the following features.
· NMEA 2000® and NMEA 0183 Interfaces
· Solid State Accelerometers for Indicating the Vessel’s Attitude (Pitch and Roll)
· Solid State Angular Rate Sensor for Indicating the Vessel’s Rate of Turn
· Advanced Kalman Filtering for Stable and Accurate Output During Dynamic Conditions
· Fast Response Time Stabilizes Auto-Pilot Systems
· Calibration for Compensating Magnetic Deviation Caused by Hard and Soft Iron Effects
· Installation-Offset Capability for Aligning the Compass to the Vessel
· Programmable Variation
· Waterproof Enclosure and Cable System
Installing the Maretron SSC200 compass involves the following six steps. Please refer to the individual sections for additional details.
1. Unpack the Box (Section 2.1)
2. Choose a Mounting Location (Section 2.2)
3. Mount the SSC200 Compass (Section 2.3)
4. Connect the SSC200 Compass (Section 2.4)
5. Calibrate the SSC200 Compass for Magnetic Deviation (Section 3.1)
6. Calibrate the SSC200 Compass for Installation-Offset (Section 3.3)
7. Use Default Variation Source or Select an Appropriate Variation Source (Section 4)
When unpacking the box containing the Maretron SSC200, you should find the following items.
1 - SSC200
· 2 - Mounting Brackets
· 4 - Mounting Bracket Screws
· 4 - Mounting Screws
· 1 - 10 meter NMEA 0183 Cable*
· 1 - NMEA 2000® Micro Field Attachable Connector (Female)*
· 1 - SSC200 User’s Manual
· 1 - Warranty Registration Card
* Only included in SSC200-01
If any of these items are missing or damaged, please contact Maretron.
The selection of a suitable mounting location is important for the optimal performance of the Maretron SSC200. The mounting location and orientation of the Maretron SSC200 should be:
1. Level with the Earth’s Horizontal Plane – Although the SSC200 can be calibrated in the vessel to compensate for pitch and roll installation-offset, it is best to mount the compass as level as possible to maximize its pitch and roll operational range.
2. Oriented with Arrow Pointing to Bow Parallel to Vessel Centerline – Although the SSC200 can be calibrated in the vessel to compensate for heading installation-offset, it is best to mount the compass pointed towards the bow and parallel to the vessel centerline. The SSC200 can be mounted in other orientations, although this requires additional configuration steps; please refer to Section 2.3 on page 3 for details.
3. Near the Center of Gravity (CG) of the Vessel – The compass experiences the least amount of movement when located at the CG, which allows the most accurate readings. This is similar to a traditional card/needle compass, where the farther the compass is from the CG, then the more the fluid sloshes around, making accurate readings more difficult.
4. Away from Structures Containing Ferrous Metals – The earth’s lines of magnetic flux tend to become distorted in the vicinity of ferrous metals, which can potentially cause errors in the compass’s indicated heading. The SSC200 can be calibrated to compensate for these errors, but it is still best to minimize the errors by placing the compass as far away from ferrous metals as is practical.
5. Away from Magnetic Field Sources – Power or ignition cables, electric motors, and other electronic equipment can create magnetic fields. The earth’s lines of magnetic flux tend to become distorted in the vicinity of magnetic field sources, which can potentially cause errors in the compass’s indicated heading. The magnetic fields tend to come and go as power is switched on and off, which makes compensation impractical. Therefore, you should try to mount the compass as far away as possible from these magnetic field sources (doubling the distance between the magnetic field source and the compass will reduce the field strength by a factor of approximately 8). Also, always observe any “compass-safe distance” markings on other electronic equipment.
6. Minimal Vibration – Although the SSC200 is more tolerant of vibration than a fluxgate compass, it is best to mount the compass in a location free of vibration as opposed to a location with vibration.
The Maretron SSC200 compass can be mounted to a horizontal surface such as a floor or deck (Section 2.3.1) or it can be mounted to a vertical surface such as a wall or bulkhead (Section 2.3.2).
Mounting the SSC200 compass to a horizontal surface requires that the provided mounting brackets be fastened to the bottom of the SSC200 using the provided brass flat head screws. Once the mounting brackets are securely fastened to the bottom of the SSC200, attach the SSC200 securely to the vessel using the included brass mounting screws or other non-ferrous fasteners as shown in Figure 1. Do not use threadlocking compounds containing methacrylate ester, such as Loctite Red (271), as they will cause stress cracking of the plastic enclosure.
The usual way of mounting the SSC200 to a horizontal surface is to mount it to the top of the horizontal surface; however, the SSC200 may be mounted upside down to the underside of a horizontal surface, provided that the SSC200 is programmed to recognized that it is mounted upside down. This can be done using a Maretron display product (e.g., DSM200 - please refer to the DSM200 user’s manual for details).
Figure 1 – Mounting the SSC200 to a Horizontal Surface
Mounting the SSC200 compass to a vertical surface requires that the provided mounting brackets be fastened to the side of the SSC200 using the provided brass flat head screws. Once the mounting brackets are securely fastened to the side of the SSC200, attach the SSC200 securely to the vessel using the included brass mounting screws or other non-ferrous fasteners as shown in Figure 2. Do not use threadlocking compounds containing methacrylate ester, such as Loctite Red (271), as they will cause stress cracking of the plastic enclosure.
The usual way of mounting the SSC200 to a vertical surface is attaching the SSC200 to the forward side of a vertical surface, so that the side of the compass with the connectors is facing the bow of the boat; however, the SSC200 may be mounted to the astern side of a vertical surface, so that the side of the compass with the connectors is facing the stern of the boat, provided that the SSC200 is programmed to recognized that it is mounted in this way (“backwards”). This can be done using a Maretron display product (e.g., DSM200 - please refer to the DSM200 user’s manual for details).