Home

SSC300 Solid State Rate/Gyro Compass User's Manual

1. Description Acronym Sentence Name Default Rate Transmitted HDG Heading Deviation and Variation 10 Times Second Sentences HDM Heading Magnetic N A HDT Heading True N A ROT Rate of Turn 5 Times Second PMAROUT Maretron Proprietary Attitude Pitch and Roll 1 Time Second TXT Text Transmission N A Received RMC Recommended Minimum Specific GNSS Data N A Sentences VTG Course Over Ground and Ground Speed N A Electrical Parameter Value Comment Operating Voltage 9 to 32 Volts DC Voltage Power Consumption lt 50mA Average Current Drain Load Equivalence Number LEN 1 NMEA 2000 Spec 1LEN 50 mA Reverse Battery Protection Yes Indefinitely Load Dump Protection Yes Energy Rated per SAE J1113 Mechanical Parameter Value Comment Size 4 46 x 3 23 x 2 14 Including Mounting Flanges 113mm x 82mm x 54 mm Weight 7 oz 198 g Including Mounting Bracket Mounting Deck or Bulkhead Environmental Parameter Value IEC 60945 Classification Exposed Degree of Protection IP67 Operating Temperature 25 to 55 C Storage Temperature 40 C to 85 C Relative Humidity 93 RH 40 per IEC60945 8 2 Vibration 2 13 2Hz 1mm 13 2 100Hz 7m s per IEC 60945 8 7 Rain and Spray 12 5mm Nozzle 100liters min from 3m for 30min per IEC 60945 8 8 Solar Radiation Ultraviolet B A Visible and Infrared per IEC 60945 8 10
2. 2 4 Connecting the SSC300 You have a choice of connecting the SSC300 to a NMEA 2000 interface Section 2 4 1 NMEA 0183 interface Section 2 4 2 or connecting both interfaces simultaneously Section 2 4 2 2 The SSC300 has two connection ports Please use the M000102 Micro Cap which is shipped installed on the NMEA 0183 connector to cover unused connectors NMEA 2000 Power NMEA 0183 Connector Connector Figure 3 NMEA 2000 NMEA 0183 Interface Connector Locations 2 4 1 Connecting to NMEA 2000 Interface The Maretron SSC300 provides a connection to an NMEA 2000 interface through a five pin male connector Figure 4 You connect the SSC300 to an NMEA 2000 network using a Maretron NMEA 2000 cable or compatible cable by connecting the female end of the cable to the SSC300 note the key on the male connector and keyway on the female connector as shown in Figure 5 below Be sure the cable is connected securely and that the collar on the cable connector is tightened firmly Connect the other end of the cable male to the NMEA 2000 network in the same manner The SSC300 is designed such that you can plug or unplug it from an NMEA 2000 network while the power to the network is connected or disconnected Please follow recommended practices for installing NMEA 2000 network products Page 6 Revision 1 0 Maretron Pins Sockets Connector Threads Connector Threads Male Connector Female Connector Pin 1 Shield
3. it will issue this message and restart deviation calibration as long as it has not failed five times 06 Deviation Calibration During calibration the vessel must not jerk or reverse directions where Invalid Movement the SSC300 is unable to reliably develop deviation data If the SSC300 senses an invalid movement it will issue this message and restart deviation calibration as long as it has not failed five times 95 Serial Number xxxxxxx The SSC300 transmits this sentence once after it is powered up to indicate its serial number 96 Baud Rate 4800 The SSC300 transmits this sentence once after it is powered up to indicate its baud rate 97 SW Version 1 2 The SSC300 transmits this sentence once after it is powered up to indicate its software version 98 Model Version 1 0 The SSC300 transmits this sentence once after it is powered up to indicate its model version 99 Model ID SSC300 The SSC300 transmits this sentence once after it is powered up to indicate its model identification Page A2 Appendix A NMEA 0183 Interfacing Revision 1 0 Maretron SSC300 NMEA 0183 Received Sentences Note on NMEA 0183 Checksums For ease of manual configuration of the SSC300 via the NMEA 0183 Interface NMEA 0183 checksums are optional If no checksum is present in a received sentence then the sentence is treated as if a valid checksum were present If a checksum is present in a received sentence then it is used to check the integrity of the sentence which
4. 8 bits set this field s value to Ox0 SSC300 NMEA 2000 Initiated Deviation Calibration Page B4 Appendix B NMEA 2000 Interfacing Revision 1 0 Maretron NMEA 2000 initiated deviation calibration is accomplished by turning the vessel through at least 3 complete circles after the SSC300 receives a Maretron proprietary NMEA 2000 PGN The procedure is as follows 1 2 3 Ensure that the compass has been properly installed per Section 2 Warm up the compass by operating it for approximately 10 minutes Turn the vessel either direction such that you complete a full 360 turn in 2 2 minutes or less try not to go below 1 minute for a complete circle Send the following NMEA 2000 PGN to the SSC300 while continuing to turn the vessel PGN 126208 NMEA Command Group Function Maretron Proprietary Reset This will initiate a reset and force the SSC300 to start the calibration process see page B3 for complete description of PGN 126208 Continue turning the vessel through at least 3 circles until you see one of the following Maretron proprietary NMEA 2000 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 t
5. Calibration The SSC300 attempts to perform calibration 5 times before giving up and Failed to Complete issuing this sentence Each time the SSC300 encounters an error see message identifiers 04 05 and 06 it restarts the calibration process Upon the 5t error the SSC300 exits the calibration routine and it must be restarted before it will once again try to perform deviation calibration 04 Deviation Calibration During calibration the vessel must not turn to fast where the SSC300 is Turning Too Fast unable to reliably develop deviation data If the SSC300 senses the vessel turning to quickly it will issue this message and restart deviation calibration as long as it has not failed five times 05 Deviation Calibration During calibration the vessel must not turn to slowly where the SSC300 Turning Too Slow is unable to reliably develop deviation data If the SSC300 senses the vessel turning to slowly it will issue this message and restart deviation calibration as long as it has not failed five times 06 Deviation Calibration During calibration the vessel must not jerk or reverse directions where Invalid Movement the SSC300 is unable to reliably develop deviation data If the SSC300 senses an invalid movement it will issue this message and restart deviation calibration as long as it has not failed five times SSC300 NMEA 2000 Received PGNs PGN 126208 NMEA Command Group Function Maretron Proprietary Reset This will initiate a re
6. Pin 2 NET S power supply positive V Pin 3 NET C power supply common V Pin 4 NET H CAN H Pin 5 NET L CAN L Figure 4 NMEA 2000 Power Connector Face Views NMEA2000 Power Connection Figure 5 SSC300 with NMEA 2000 Connection Only Revision 1 0 Page 7 SSC300 User s Manual 2 4 2 Connecting to NMEA 0183 Interface The Maretron SSC300 provides a connection to an NMEA 0183 interface through an eight pin male connector Figure 6 You connect the SSC300 to an NMEA 0183 network using the optional MARE 004 1M 7 Maretron 10 meter cable by connecting the female end of the cable to the SSC300 note the key on the male connector and keyway on the female connector Be sure the cable is connected securely and that the collar on the cable connector is tightened firmly Connector Threads Connector Threads Male Connector Female Connector Pin 1 Not Used Pin 2 Not Used Pin 3 Not used Pin 4 Not used Pin 5 TXB NMEA0183 OUT Pin 6 TXA NMEA0183 OUT Pin 7 RXB NMEA0183 IN Pin 8 RXA NMEA0183 IN Figure 6 NMEA 0183 Connector Face Views Connect the other end of the cable consisting of individual wires using recommended practices for installing NMEA 0183 products Please note that NMEA 0183 does not have a standard for connectors and the customer installer should contact the manufacturer of the equipment to which the SSC300 is being connected for informatio
7. SSC300 to retransmit the last deviation calibration status message PMARSETPX Maretron Proprietary Set Period Sentence The SSC300 can be programmed to enable or disable the periodic transmission of the HDG HDM HDT ROT and PMAROUT sentences In addition the periodic transmission rate for these sentences and the Variation Lifetime see RMC and VTG can be programmed using this sentence PMARSETPX SSC300 A B hh lt CR gt lt LF gt Field A Identifier code identifies the sentence or parameter to be programmed see following table B Integer where 0 disables sentence and positive numbers are multipliers of 1ms i e programmed integer of 200 would mean a 200ms transmission interval Identifier Code Sentence Default Rate 00 HDG 100 100ms 01 HDM 0 or Disabled 02 HDT 0 or Disabled 03 ROT 200 or 200ms 04 PMAROUT 1000 or 1sec OA Variation Lifetime 5000 or 5sec Some example sentences are shown below 1 To disable transmission of the HDG sentence PMARSETPX SSC300 00 0 2 To enable transmission of the HDG sentence at intervals of 100 ms PMARSETPX SSC300 00 100 3 To disable transmission of the HDM sentence PMARSETPX SSC300 01 0 4 To enable transmission of the HDM sentence at intervals of 1000 ms PMARSETPX SSC300 01 1000 Page A4 Appendix A NMEA 0183 Interfacing Revision 1 0 Maretron 5 To disable transmission of the HDT sentence PMARSETPX SSC300 02 0 6 To enable
8. SSC300 using the provided brass flat head screws Once the mounting brackets are securely fastened to the side of the SSC300 attach the SSC300 securely to the vessel using the included brass mounting screws or other non ferrous fasteners Page 4 Revision 1 0 Maretron 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 use of adhesives Velcro straps or any mounting hardware not supplied with the SSC300 is not recommended as it may adversely affect the performance of the SSC300 The usual way of mounting the SSC300 to a vertical surface is attaching the SSC300 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 SSC300 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 SSC300 is programmed to recognize that it is mounted in this way backwards This can be done using a Maretron DSM150 display DSM250 display or Maretron N2KAnalyzer software please refer to the appropriate user s manual for details or through a command sent to the SSC300 via the NMEA 0183 interface please refer to Appendix A for details Figure 2 Mounting the SSC300 to Vertical Surface Revision 1 0 Page 5 SSC300 User s Manual
9. is accepted only if the calculated checksum agrees with the checksum at the end of the received sentence To ensure the best possible data integrity Maretron recommends using NMEA 0183 checksums whenever possible RMC Recommended Minimum Specific GNSS Data The SSC300 is capable of receiving the RMC sentence and extracting the magnetic variation data for subsequent insertion into the appropriate fields for transmission of the HDG and HDT sentences The SSC300 uses an aging technique referred to as Variation Lifetime where variation data is output in the HDG and HDT sentences for a period of 5 seconds after the RMC sentence is received The Variation Lifetime can be re programmed to a shorter or longer period see PMARSETP sentence VTG Course Over Ground and Ground Speed The SSC300 is capable of receiving the VTG sentence and computing the magnetic variation data for subsequent insertion into the appropriate fields for transmission of the HDG and HDT sentences The variation is computed by observing the difference between the true course over ground and the magnetic course over ground The SSC300 uses an aging technique referred to as Variation Lifetime where variation data is output in the HDG and HDT sentences for a period of 5 seconds after the VTG sentence is received The Variation Lifetime can be re programmed to a shorter or longer time period see PMARSETP sentence PMAREXE Maretron Proprietary Execute Sentence
10. 0 data simultaneously optional NMEA 0183 cable accessory required for NMEA 0183 output e P67 waterproof enclosure 1 4 SSC300 Accessories Maretron offers the following accessories for the SSC300 e FA CF ST Micro Mid Field Attachable Connector Straight Female e MARE 004 1M 7 SSC200 SSC300 Compass NMEA 0183 10 meter connection cable 1 5 Quick Install Installing the Maretron SSC300 compass involves the following six steps Please refer to the individual sections for additional details Unpack the Box Section 2 1 Choose a Mounting Location Section 2 2 Mount the SSC300 Compass Section 2 3 Connect the SSC300 Compass Section 2 4 Calibrate the SSC300 Compass for Magnetic Deviation Section 3 2 Calibrate the SSC300 Compass for Installation Offset Section 3 4 Use Default Variation Source or Select an Appropriate Variation Source Section 4 SO OT EN 2 Installation 2 1 Unpacking the Box When unpacking the box containing the Maretron SSC300 you should find the following items 1 SSC300 Solid State Compass 2 Mounting Brackets 4 Mounting Bracket Screws 4 Mounting Screws 1 SSC300 User s Manual 1 Warranty Registration Card If any of these items are missing or damaged please contact Maretron 2 2 Choosing a Mounting Location The selection of a suitable mounting location is important for the optimal performance of the Maretron SSC300 The mounting location and orientation of the Maretron SSC300 sho
11. 11 Maretron 2 Year Limited Warranty 0 cceeeeeeeeeneee cece e eee eeeeeeeeeeeeeeeeeeeeeeeeeaaeeeeeeeeeeeeeee 23 Revision 1 0 Page iii SSC300 User s Manual Table of Figures Figure 1 Mounting the SSC300 to a Horizontal Surface ce Figure 2 Mounting the SSC300 to Vertical Surface eee Figure 3 NMEA 2000 NMEA 0183 Interface Connector Locations Figure 4 NMEA 2000 Power Connector Face Views ccccccceecseeeees Figure 5 SSC300 with NMEA 2000 Connection Only ccccccceeseeees Figure 6 NMEA 0183 Connector Face VieWS 2 eceeeeeeeeeeeeeeetteees Figure 7 NMEA 0183 Cable Wire Color Coding cceceeeeeeeeeeeeeeees Figure 8 SSC300 with NMEA 0183 Connection Only eeeeeeees Figure 9 Troubleshooting Guide c cccceceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees Figure 10 Horizontal Mounting Surface Template eeeeeeeeeeees Figure 11 Vertical Mounting Surface Template ccceeeeeeeeeeeeeees Table of Appendices Appendix A NMEA 0183 Interfacing ccceeeeeeeeeeeeeeeeeeeeeeeeeneeeeeeeeees Appendix B NMEA 2000 Interfacing ccccccecsccsecseecsseeseeesseeseeeneees Appendix C Connecting to a PC Via NMEA 0188 0 eee eee cece eeeeeeereeeeeees Appendix D Configuring the SSC300 to Transmit True Heading Data Appendix E Co
12. 2 level converter some people have reported success connecting directly to a RS 232 serial port using the following connections a Connect TXB brown and RXB white together and to the System Ground pin GND pin 5 of the RS 232 port b Connect TXA gray to the Receive Data pin RXD pin 2 of the RS 232 port c Connect RXA blue to the Transmit Data pin TXD pin 3 of the RS 232 port Ensure that the NMEA 0183 signals from the SSC300 are connected to nothing else besides the computer s RS 232 port to avoid ground loops While some people have had success with this method Maretron cannot guarantee that such a connection will work with every computer and highly recommends the use of a level converter 2 Connect power to the compass a Connect 9 16 VDC to V red b Connect system ground to V black 3 Start Hyperterm and connect it to the port to which the SSC300 is connected 4800 or 38400 bps depending on the baud rate the compass is set to 8 data bits no parity 1 stop bit You should now see compass data in the form of NUEA0183 sentences on the Hyperterm screen 4 Type shell The NMEA0183 sentences will stop and a cmd gt prompt will appear Revision 1 0 Appendix C Connecting to a PC Via NMEA 0183 Page C1 SSC300 User s Manual This page intentionally left blank Page C2 Appendix C Connecting to a PC Via NMEA 0183 Revision 1 0 Maretron Appendix D Configuring the SSC300 to Transmit True
13. 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 SSC300 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 7 Limited Water Exposure The SSC300 has an IP67 rating which means the compass is able to withstand nozzle spray and is protected against water immersion up to 1m for up to 30 minutes Please avoid areas which would result in the SSC300 being immersed in water which exceeds these depths or times 2 3 Mounting the SSC300 The Maretron SSC300 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
14. 50 or N2KAnalyzer software nor the SSC300 will make these changes automatically they are the responsibility of the user SSC300 NMEA 2000 Non Periodic Data Transmitted PGNs PGN 126270 Maretron Proprietary Slave Response Deviation Calibration Status This indicates the status of the deviation calibration process Field 1 Maretron Vendor ID and Industry Code 16 bits this field s value will be 0x9889 2 Product Code 16 bits this field s value will be 0x1B2 which is the NMEA 2000 product code for the SSC300 3 Software Code 16 bits this field s value will be 0x0001 which is the identifier for this version of the Maretron proprietary protocol 4 Command 8 bits this field s value will be 0x50 which indicates that this response contains status for deviation calibration 5 Status Code 8 bits this field will indicate the status of the calibration process with one of the values from the following table see following table Page B2 Appendix B NMEA 2000 Interfacing Revision 1 0 Maretron mars Message Name Description 01 Deviation Calibration This message is transmitted at the beginning of the magnetic deviation Started calibration process 02 Deviation Calibration This message is transmitted upon successful completion of the magnetic Completed Successfully deviation calibration process i e a new deviation table has been stored in permanent memory 03 Deviation
15. A 0183 Connection Only 2 4 2 2 Supported NMEA 0183 Baud Rates The SSC300 compass supports NMEA0183 communication at both 4800 baud and 38400 baud All SSC300 Compasses are shipped with a baud rate of 4800 baud The baud rate may be set to 38400 baud by connecting to the compass using a terminal emulator See Appendix C for details and sending the following strings to the compass through the NMEA 0183 connection shell This will cause the cmd gt command prompt to be displayed tm setbaud 38400 Revision 1 0 Page 9 SSC300 User s Manual At this point you must change the baud rate of your connection to 38400 baud to continue as the SSC300 has now been set to the higher baud rate tm storebaud This causes the new baud rate to be stored to non volatile memory so the compass will retain this baud rate when it is powered down 2 4 3 Connecting Both NMEA 2000 and NMEA 0183 Interfaces The SSC300 can be simultaneously connected to both an NMEA 2000 network and an NMEA 0183 network 2 4 4 Checking Connections Once the NMEA 2000 Power and or NMEA 0183 connections to the Maretron SSC300 have been completed check to see that heading information is being properly transmitted by observing an appropriate display Refer to Section 7 Troubleshooting if no heading information appears otherwise proceed to Section 3 entitled Calibration 3 Calibration In order to provide accurate heading indication the SSC300 m
16. A 0183 Interface cccceeeceeeeeeeeeeeeeeneeeeeeeeeeeeeeeenneeeeeeees 14 4 2 Variation Input via the NMEA 2000 Interface ccccccccecsecssecseeeseeeseeenseeseeeneees 14 4 3 Variation Input via Manual Entry ssccestincnseciscextnasieuntnur pier nenn exexsceuteevsveybverbexvaaeseseumeaniel 15 4 4 Variation Source Selection ccccccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeaeeeeeeeeeeeeeeeseneeeaeeeeeees 15 4 4 1 Variation Source Selection via Maretron Display ceecceessseeeeeeeeees 16 4 4 2 Variation Source Selection via NMEA 0183 Interface 16 5 RIE O TUNN eene EEE ad ese eee ees 16 5 1 Rate of Turn Damping Period Selection with Maretron Display c cceeee 16 5 2 Rate of Turn Damping Period Selection by NMEA 0183 Interface ce 16 5 3 Rate of Turn Zeroing as tascsccpedeeecctadecenie apie assecducegtadtocdebadtenetiadisedtendusestdediaenutanpeceacls 16 6 Maint enanC Eesaia enie rara aena e ae eae ae aaeeea aaae arenie irena tiraniei 17 7 Troubleshooting perenne ee mem etree enter er mn me ene rene en eee 18 8 Technical SHSCMC AMON Sisoe coer secesecssccnssdenctecedvasascodenatecedendecsdsnedbesdunebecsuaschesdsnsbededenestaseunts 19 9 Technical SOI sept seg vee ciatacticlcecieelua veallelgectet ogi potatalaniclaen ayetee payee a iea a aa a e 21 10 Installation Template scscsacceascenscncsesnnstesusedepeceeasennnsandusenedasiaeieenddenanhentnesnensteestaasteeseencienisttie 22
17. Analyzer software Refer to the display product user s manual for details on programming the SSC300 to use a specific damping period 5 2 Rate of Turn Damping Period Selection by NMEA 0183 Interface You can program the SSC300 to use a particular rate of turn damping period through the NMEA 0183 interface Refer to Appendix A for details on programming the SSC300 to use a specific damping period 5 3 Rate of Turn Zeroing The SSC300 may be used as a rate of turn indicator which should read zero when the vessel is not turning It is possible that the rate of turn indication has an offset that is it may show a non zero value when the vessel is at rest This offset changes with temperature but the SSC300 has the ability to remember the offset at different temperatures You teach the SSC300 by using Rate of Turn Zeroing It is possible to do Rate of Turn Zeroing using a Maretron display product such as the DSM150 DSM250 or N2KAnalyzer software please refer to the display product user s manual for details Page 16 Revision 1 0 Maretron 6 Maintenance Regular maintenance is important to ensure continued proper operation of the Maretron SSC300 Perform the following tasks periodically e Clean the unit with a soft cloth Do not use chemical cleaners as they may remove markings or may corrode the compass enclosure or seals Do not use any cleaners containing acetone as they will deteriorate the plastic enclosure e Ensu
18. Corrosion Salt Mist 4 times 7days 40 C 95 RH after 2 hour Salt Spray Per IEC 60945 8 12 Electromagnetic Emission Conducted and Radiated Emission per IEC 60945 9 Electromagnetic Immunity Conducted Radiated Supply and ESD per IEC 60945 10 Safety Precautions Dangerous Voltage Electromagnetic Radio Frequency per IEC 60945 12 Page 20 Revision 1 0 9 Technical Support Maretron If you require technical support for Maretron products you can reach us in one of the following ways Telephone Fax E mail World Wide Web Mail Revision 1 0 1 866 550 9100 1 602 861 1777 support maretron com http www maretron com Maretron LLP Attn Technical Support 9014 N 23 Ave Suite 10 Phoenix AZ 85021 USA Page 21 SSC300 User s Manual 10 Installation Template Please check the dimensions before using the following diagrams as templates for drilling the mounting holes because the printing process may have distorted the dimensions lt _____ _ 3 87 _ ______ gt Figure 11 Vertical Mounting Surface Template Page 22 Revision 1 0 Maretron 11 Maretron 2 Year Limited Warranty Maretron warrants the SSC300 to be free from defects in materials and workmanship for two 2 years from the date of original purchase If within the applicable period any such products shall be proved to Maretron s satisfac
19. Heading Data The SSC300 is factory configured to transmit magnetic heading data on the NMEA0183 interface Some NMEA 0183 applications require true heading data This application note describes how to configure the SSC300 to transmit true heading data Prerequisites The SSC300 compass must have firmware revision 1 7 or greater The SSC300 compass must either transmit the default HDG sentence or be configured to transmit the HDT sentence see Application Note 1 Configuring the SSC300 to Transmit the HDT Sentence for Satellite Antennas and Radars Instructions There are two choices for a magnetic variation source for the SSC300 GPS preferred or manual GPS Variation In order to use a GPS to enable the SSC300 compass to transmit true heading data the GPS antenna must transmit magnetic variation data Not all GPS antennas transmit magnetic variation data Please consult the GPS antenna user s manual for details 1 2 4 Ensure that the GPS antenna is configured to transmit either the RMC or VTG sentence Either sentence should work equally well Connect the NMEA 0183 output of the GPS antenna to the NMEA 0183 input of the SSC300 Please note the following cable connections on the SSC300 GPS Connection SSC300 Connection TXA TX Blue Wire RXA RX TXB TX White wire RXB RX The SSC300 should now be transmitting true heading data Examine the NMEA 0183 sentences coming from the SSC300 or check the heading
20. LIED WARRANTIES OF MERCHANTABILITY AND OF FITNESS FOR A PARTICULAR PURPOSE Statements made by any person including representatives of Maretron which are inconsistent or in conflict with the terms of this Limited Warranty shall not be binding upon Maretron unless reduced to writing and approved by an officer of Maretron IN NO CASE WILL MARETRON BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES DAMAGES FOR LOSS OF USE LOSS OF ANTICIPATED PROFITS OR SAVINGS OR ANY OTHER LOSS INCURRED BECAUSE OF INTERRUPTION OF SERVICE INNO EVENT SHALL MARETRON S AGGREGATE LIABILITY EXCEED THE PURCHASE PRICE OF THE PRODUCT S INVOLVED MARETRON SHALL NOT BE SUBJECT TO ANY OTHER OBLIGATIONS OR LIABILITIES WHETHER ARISING OUT OF BREACH OF CONTRACT OR WARRANTY TORT INCLUDING NEGLIGENCE OR OTHER THEORIES OF LAW WITH RESPECT TO PRODUCTS SOLD OR SERVICES RENDERED BY MARETRON OR ANY UNDERTAKINGS ACTS OR OMISSIONS RELATING THERETO Maretron does not warrant that the functions contained in any software programs or products will meet purchaser s requirements or that the operation of the software programs or products will be uninterrupted or error free Purchaser assumes responsibility for the selection of the software programs or products to achieve the intended results and for the installation use and results obtained from said programs or products No specifications samples descriptions or illustrations provided Maretron to Purchaser whether directly in t
21. Maretron SSC300 Solid State Rate Gyro Compass User s Manual Revision 1 0 Copyright 2015 Maretron LLP All Rights Reserved Maretron LLP 9014 N 23 4 Ave 10 Phoenix AZ 85021 7850 http www maretron com Maretron Manual Part M003069 Revision 1 0 Page i SSC300 User s Manual Revision History Revision Description 1 0 Original document Page ii Revision 1 0 Maretron Table of Contents 1 General sereen Reads tiie eee ait eatematenatenadas 1 1 1 WPI OCI GO Nsei taatsiad acl ania a a dicta i aaa ia 1 1 2 Firmware REVISION sccecccccccecccesccescccadcescceadsesccecdseadabndcesdaeadstadebsesdseedetaddenistcedenstenets 1 13 PORUNES iors omniamion E ETE E ERTE E E TEE E EEE E TE 1 1 4 SSC300 ACCESSONICS eecccccceeeeeeeeeeeeececeeeeeeeeeeeeaaaaeaceeeeeeeeeeeaaaaaaaeeeeeeeeeeeennsaeaaes 2 1 5 Quick Install grenna aaraa e e e era aterat 2 2 Installati n eae cee mn nn a RaR RR ERRER eee R 2 2 14 Unpacking th BOX svrsio massie eae eni e eni e A N Eaa 2 2 2 Choosing a Mounting Location i giccs ot os eee rest raced eeepc ya aise eeaveevst teenies 2 2 3 Mounting the SSC300 eae siec cee rrceapeee neh cracncetencecccpapeeecrsaheee psd aceeevadeneeeagegeeeeeneeennge 3 2 3 1 Mounting the SSC300 to a Horizontal Surface cccccccecceeeeeeeeeeeeeeees 3 2 3 2 Mounting the SSC300 to a Vertical Surface ccccccccccceceeceeeeeeeeeeeeeeeeees 4 ZA Connecting the S
22. NMEA 0183 sentences Some NMEA 2000 networks may have multiple nodes transmitting the 127258 Magnetic Variation PGN which can cause problems with true heading output on the NMEA 0183 interface if any of the nodes are transmitting incorrect magnetic variation values If you notice heading Page 14 Revision 1 0 Maretron readings different from what you expect you can use tools such as N2KAanalyzer to locate all sources of the 127258 Magnetic Variation PGN 4 3 Variation Input via Manual Entry If no other source of variation is available i e from either the NMEA 0183 or NMEA 2000 interface the SSC300 can be programmed with a fixed variation value for a given location this value can be found on most navigational charts If variation is manually entered into the SC300 then it will do the following 1 Transmit the Heading Deviation amp Variation HDG sentence including the variation field as manually entered over the NMEA 0183 interface if HDG is enabled see Appendix A for enabling or disabling NMEA 0183 sentences 2 Transmit the Heading True HDT sentence using variation data as manually entered over the NMEA 0183 interface if HDT is enabled see Appendix A for enabling or disabling NMEA 0183 sentences 3 Transmit over the NMEA 2000 interface the Magnetic Variation PGN 127258 with the Variation Source field value corresponding to the manually entered variation The PGN s Variation Source field will be transmi
23. Revision 1 0 Page 13 SSC300 User s Manual Normally the SSC300 will automatically use variation from either the NMEA 0183 interface or the NMEA 2000 interface however you can force the SSC300 to use variation from only the NMEA 0183 interface or you can force the SSC300 to use variation from only the NMEA 2000 interface or you can force SSC300 to only use manually entered variation WARNING Multiple variation sources that are received by the SSC300 i e NMEA 0183 and NMEA 2000 interfaces will cause confusion as to the correct source to be used for true heading indications If more than one variation source is available then the SSC300 needs to be programmed to use the appropriate source for reporting subsequent true heading information See Section 4 4 for details on choosing a specific variation source when more than one variation source is available 4 1 Variation Input via NMEA 0183 Interface As shipped from the factory the SSC300 automatically looks for variation data coming from the NMEA 0183 interface The SSC300 accepts variation data from the Recommended Minimum Specific GNSS Data RMC sentence or the SSC300 computes variation from the Course Over Ground and Ground Speed VTG sentence If the SSC300 does indeed receive variation information from the NMEA 0183 interface then it will do the following 1 Transmit the Heading Deviation amp Variation HDG sentence including the variation field as seen from the RMC or V
24. SC300 iscsi cesicescenscemnsinesnnuestemusind enc hedwesuebadenddeeetensde adencesbedensteeersde 6 2 4 1 Connecting to NMEA 2000 Interface cccccccccccssccsscssecseceessecseessceseenes 6 2 4 2 Connecting to NMEA 0183 Interface ceeeeeeeeeeeeeeeeeeeeeeeeeeteeeeeeeeeeeeeees 8 2 4 3 Connecting Both NMEA 2000 and NMEA 0183 Interfaces 006 10 2 4 4 Checking COMME COINS gcse tnctcasiescesicncntsennansahneiaunem cana ineueetanememememeniaunnane 10 3 CONANT AAE P E E E A E E E E EE EA EAE E E E E E EE E 10 3 1 Rate of Turn Zero Offset Calibration ccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeennneeeeeeees 10 3 2 Installation Offset Correction First Time cccceeeeeeeeeeeeeneeeeeeeeeeeeeeeeeneneeeeeeeees 10 3 2 1 Maretron Display Product Offset Correction cccccccccceccececceeeeeeeeeeees 11 3 2 2 Manual Installation Offset Correction cccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 11 3 3 Magnetic Deviation Calibration ccccccceceececeeeccceeeeeeeeeeeeeeeaeeeeeeeeeeeeeesseneeaeeeeeeees 11 3 3 1 Maretron Display Initiated Deviation Calibration ccccccccccceceseeeeeeees 12 3 3 2 Automatic Power Up Deviation Calibration ccccccccccccceceececeeeeeeeeeeees 13 3 4 Installation Offset Correction Second TiMe cccccceeeeeeeeeeeeteeeeeeeeeeeeseeenneeeeeeees 13 4 Vanalinn EE R AAE E AA E E E E a ETER 13 4 1 Variation Input via NME
25. Section 2 3 2 2 3 1 Mounting the SSC300 to a Horizontal Surface Mounting the SSC300 compass to a horizontal surface requires that the provided mounting brackets be fastened to the bottom of the SSC300 using the provided brass flat head screws Once the mounting brackets are securely fastened to the bottom of the SSC300 attach the SSC300 securely to the vessel using the included brass mounting screws or other non ferrous Revision 1 0 Page 3 SSC300 User s Manual 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 SSC300 to a horizontal surface is to mount it to the top of the horizontal surface however the SSC300 may be mounted upside down to the underside of a horizontal surface provided that the SSC300 is programmed to recognize that it is mounted upside down This can be done using a Maretron DSM150 display DSM250 display or Maretron N2KAnalyzer software please refer to the appropriate user s manual for details or through a command sent to the SSC300 via the NMEA 0183 interface please refer to Appendix A for details Figure 1 Mounting the SSC300 to a Horizontal Surface 2 3 2 Mounting the SSC300 to a Vertical Surface Mounting the SSC300 compass to a vertical surface requires that the provided mounting brackets be fastened to the side of the
26. TG sentence over the NMEA 0183 interface if HDG is enabled see Appendix A for enabling or disabling NMEA 0183 sentences 2 Transmit the Heading True HDT sentence using variation data from the RMC or VTG sentence over the NMEA 0183 interface if HDT is enabled see Appendix A for enabling or disabling NMEA 0183 sentences 3 Transmit over the NMEA 2000 interface the Magnetic Variation PGN 127258 with the Variation Source field value corresponding to the received NMEA 0183 variation data from the RMC or VTG sentence The PGN s Variation Source field will be transmitted with the lowest possible quality indicator which is Manual Entry 4 2 Variation Input via the NMEA 2000 Interface As shipped from the factory the SSC300 automatically looks for variation data coming from the NMEA 2000 interface The SSC300 accepts variation data from the Magnetic Variation PGN 127258 If the SSC300 does indeed receive variation information from the NMEA 2000 interface then it will do the following 1 Transmit the Heading Deviation amp Variation HDG sentence including the variation field as seen from the Magnetic Variation PGN 127258 from the NMEA 2000 interface if HDG is enabled see Appendix A for enabling or disabling NMEA 0183 sentences 2 Transmit the Heading True HDT sentence using variation data from the Magnetic Variation PGN 127258 from the NMEA 2000 interface if HDT is enabled see Appendix A for enabling or disabling
27. The SSC300 can be commanded via this proprietary sentence to execute one of several commands PMAREXE SSC300 F0 lt CR gt lt LF gt This command causes the SSC300 to be reset and is useful for initiating deviation calibration PMAREXE SSC300 FD 0 lt CR gt lt LF gt This command causes the SSC300 to stop outputting normal periodic data like heading and is useful for observing non periodic sentences such as status sentences during deviation calibration PMAREXE SSC300 FD 1 lt CR gt lt LF gt This command causes the SSC300 to once again output periodic data Normally periodic data is disabled during the calibration process such that status messages are easy to see and not lost within normal periodic data This sentence is used to turn the periodic data back on PMAREXE SSC300 24 known heading in tenths of degrees lt CR gt lt LF gt This is the command used to perform installation offset where the compass is aligned to a known heading and the pitch and roll are zeroed to the vessel s current attitude If the current or known heading is 177 0 then a value of 1770 should be programmed PMAREXE SSC300 5D 0 variation lt CR gt lt LF gt This command causes the SSC300 to use a manual entry for variation variation is programmed using 1 10 of a degree resolution as an example use 2 3 in the variation field for a 2 3 variation PMAREXE SSC300 5D 1 lt CR gt lt LF gt This command cau
28. ays reads 01 Always reads 01 C Message identifier see following table D Text string see following table staat Text String Description 01 Deviation Calibration This message is transmitted at the beginning of the magnetic deviation Started calibration process 02 Deviation Calibration This message is transmitted upon successful completion of the magnetic Completed Successfully _ deviation calibration process i e a new deviation table has been stored in permanent memory 03 Deviation Calibration The SSC300 attempts to perform calibration 5 times before giving up and Failed to Complete issuing this sentence Each time the SSC300 encounters an error see message identifiers 04 05 and 06 it restarts the calibration process Upon the 5 error the SSC300 exits the calibration routine and it must be restarted before it will once again try to perform deviation calibration 04 Deviation Calibration During calibration the vessel must not turn to fast where the SSC300 is Turning Too Fast unable to reliably develop deviation data If the SSC300 senses the vessel turning to quickly it will issue this message and restart deviation calibration as long as it has not failed five times 05 Deviation Calibration During calibration the vessel must not turn to slowly where the SSC300 Turning Too Slow is unable to reliably develop deviation data If the SSC300 senses the vessel turning to slowly
29. ced by the two character identifier you wish the SSC300 to transmit for example to change to a heading of HE type the sentence PMAREXE SSC300 DF HE Note For compasses with firmware revision 1 8 or greater a NMEA 0183 checksum is optional For compasses with earlier firmware revisions a correct NMEA 0183 checksum is required 3 Type exit or simply power the SSC300 off and then on again You should now observe sentences being transmitted using the desired NMEA 0183 identifier Revision 1 0 Appendix F Changing the NMEA 0183 Identifier Page F1
30. ction is done using one of four possible procedures 1 Maretron Display Product Initiated Section 3 2 1 Page 10 Revision 1 0 Maretron 2 Manual Installation Offset Correction Section 3 2 2 3 Through the NMEA 0183 Interface Appendix A 4 Through the NMEA 2000 Interface Appendix B The preferred method for installation offset is to use a Maretron display procedure 1 which will automatically calibrate the SSC300 without physically adjusting the compass as describe under procedure 2 As an alternative to procedures 1 and 2 users with direct access to the NMEA 0183 and NMEA 2000 interfaces can perform installation offset correction through the NMEA 0183 interface see Appendix A or the NMEA 2000 interface see Appendix B 3 2 1 Maretron Display Product Offset Correction Installation offset correction can be performed using a Maretron display product e g DSM150 DSM250 or N2KAnalyzer software The procedure is as follows 1 Make sure the vessel is laying in flat water on a known heading 2 Use the display s menu items to locate and send the compass installation offset correction command please refer to display product user s manual 3 2 2 Manual Installation Offset Correction Manual installation offset correction is performed by physically aligning the compass with the vessel The procedure is as follows 1 With the vessel laying flat in the water adjust the roll angle of the SSC300 by adding small was
31. d return to step number 1 6 Turn the periodic transmissions back on by sending the following Maretron proprietary NMEA0183 sentence to the SSC300 PMAREXE SSC300 FD 1 lt CR gt lt LF gt 7 Proceed to Installation Offset Correction SSC300 NMEA 0183 Installation Offset Correction Installation offset correction can be performed by sending a Maretron proprietary NMEA 0183 sentence to the SSC300 The procedure is as follows 1 Make sure the vessel is laying in flat water on a known heading 2 Send the following Maretron proprietary NMEA 0183 sentence to the SSC300 PMAREXE SSC300 24 known heading in tenths of degrees lt CR gt lt LF gt Where known heading in tenths of degrees is expressed in 10 of degrees i e 121 7 would be programmed as 1217 Sending this Maretron proprietary NMEA 0183 sentence to the SSC300 causes the heading roll and pitch offsets to be written to permanent memory Page A6 Appendix A NMEA 0183 Interfacing Revision 1 0 Maretron Appendix B NMEA 2000 Interfacing SSC300 NMEA 2000 Periodic Data Transmitted PGNs PGN 127250 Vessel Heading The SSC300 uses this PGN to indicate the vessel s heading The Heading Sensor Reading field 2 includes deviation therefore Deviation field 2 always contains zero Variation field 4 is not provided by the SSC300 therefore this field always contains a value of Ox7FFF data not available Since the SSC300 s core technology is based on
32. direct access methods also provide an indication of a successful deviation calibration or an indication of an unsuccessful deviation calibration and the corresponding reason for the failure 3 3 1 Maretron Display Initiated Deviation Calibration Maretron display initiated deviation calibration is accomplished by turning the vessel through consecutive circles while the SSC300 receives a command from a Maretron display product e g DSM150 DSM250 or N2KAnalyzer software 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 21 2 minutes or less try not to go below 1 minute for a complete circle 4 While continuing to turn the vessel as indicated in step 3 use the display s menu items to locate and send the deviation calibration command please refer to the display product user s manual 5 Continue turning the vessel through at least three complete circles until the display indicates a successful deviation calibration While turning the vessel try to maintain a circle by holding the rudder at a constant angle In addition try to minimize the vessel s pitch and roll by calibrating on calm flat water After deviation calibration is complete the results of the deviation calibration which indicate the quality of the compass installatio
33. e PC s serial port and obtain the cmd gt prompt per the instructions in Appendix C 2 Todisable transmission of the HDG sentence type the following sentence SPMARSETPX SSC300 00 0 3 To enable transmission of the HDT sentence at 100 ms intervals 10 times per second type the sentence SPMARSETPX SSC300 02 100 Note For compasses with firmware revision 1 8 or greater a NMEA 0183 checksum is optional For compasses with earlier firmware revisions a correct NMEA 0183 checksum is required 4 Type exit or simply power the SSC300 off and then on again You should now observe HDT sentences being transmitted Revision 1 0 Appendix E Transmitting the HDT Sentence Page E1 SSC300 User s Manual This page intentionally left blank Page E2 Appendix E Transmitting the HDT Sentence Revision 1 0 Maretron Appendix F Changing the NMEA0183 Identifier Transmitted by the SSC300 The identifier for NUEA0183 sentences transmitted by the SSC300 is set by the factory to be II however some users may need to change this to other values This addendum explains how to change the NMEA 0183 identifier for the SSC300 Prerequisites The SSC300 compass must have firmware revision 1 7 or greater Instructions 1 Connect the SSC300 to the PC s serial port and obtain the cmd gt prompt per the instructions in Appendix C 2 Type the following sentence PMAREXE SSC300 DF Where is repla
34. he deviation calibration process see page B2 for complete description of PGN 126270 SSC300 NMEA 2000 Installation Offset Correction Installation offset correction can be performed by sending a Maretron proprietary NMEA 2000 PGN to the SSC300 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 PGN to the SSC300 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 Revision 1 0 Appendix B NMEA 2000 Interfacing Page B5 SSC300 User s Manual This page intentionally left blank Page B6 Appendix B NMEA 2000 Interfacing Revision 1 0 Maretron Appendix C Connecting to a PC Via NMEA 0183 In order to perform configuration of the SSC300 over the NMEA 0183 interface it is preferable that the connection be made by a RS 232 to RS 422 level converter In the case that a level converter is not available the following method can be attempted 1 Connect the SSC300 to the PC s serial port Please note that the SSC300 uses RS 422 signal levels while PC serial ports operate with RS 232 signal levels If you do not have a RS 232 to RS 42
35. hers or spacers between the mounting bracket holes and mounting surface until the display reads zero for the roll angle skip this step if you are not interested in viewing the vessel s roll angle 2 With the vessel laying flat in the water adjust the pitch angle of the SSC300 by adding small washers or spacers between the mounting bracket holes and mounting surface until the display reads zero for the pitch angle skip this step if you are not interested in viewing the vessel s pitch angle 3 With the vessel laying flat in the water on a known heading adjust the heading of the SSC300 by rotating it until the display reads the known vessel heading 4 Recheck that the roll and pitch readings are zero and that the indicated heading is correct repeat steps 1 through 3 as necessary 5 Securely fasten the SSC300 by tightening the mounting screws 3 3 Magnetic Deviation Calibration Magnetic and or ferrous items near a magnetic compass such as the SSC300 can cause errors in the compass heading output These errors are referred to as magnetic deviation The Maretron SSC300 compass can compensate for heading errors caused by magnetic deviation by learning about the magnetic environment in which it has been mounted This is done using one of four possible magnetic deviation calibration procedures 1 Maretron Display Product Initiated Section 3 3 1 2 Automatically at Power Up Section 3 3 2 Revision 1 0 Page 11 SSC300 User s Man
36. hird Commanded Parameter 8 bits set this field s value to 0x03 11 Software Code 16 bits set this field s value to 0x0001 which is the identifier for this version of the Maretron proprietary protocol 12 Maretron Command 8 bits set this field s value to 0x24 which will cause installation offset calibration to be performed 13 Heading Value 16 bits set this field s value to the current known heading in tenths of degrees a value between 0 and 3599 For example 121 7 would be programmed as 1217 decimal or 0x4C1 hexadecimal PGN 126208 NMEA Request Group Function Transmission Periodic Rate This PGN will enable or disable the periodic transmission of specific PGNs Field 1 Complex Command Group Function Code 8 bits set this field s value to 0x00 which denotes a request PGN 2 Requested PGN 24 bits set this field s value to the corresponding PGN for which you wish to change the periodic rate 3 Transmission Interval 32 bits set this field s value to 0x0 to disable the periodic transmission of the PGN identified in field 2 above Otherwise program in the default periodic rate to restore periodic transmission of the PGN identified in field 2 above The resolution of this field is 1 millisecond 4 Transmission Interval Offset 16 bits set this field s value to OxFFFF all other values will cause the request to be rejected 5 Number of Pairs of Commanded Parameters to Follow
37. indication on the system connected to the NMEA 0183 output of the SSC300 for true heading data If no true heading data is observed at this point try d switching the wires on the GPS gt SSC300 connection as not all manufacturers are consistent in their labeling of the NMEA 0183 wires e ensuring the SSC300 is configured to transmit either HDG or HDT f ensuring the GPS antenna is transmitting Magnetic Variation Data The sentences should look one of the sentences below where the lowercase letter placeholders are replaced with numerical values SGPRMC hhmmss ss A 1111 1l a yyyyy yy a X X X X XXXXXX x x a a hh The two underlined fields contain the magnetic variation data and must be present in order for this sentence to be used for magnetic variation SGPVTG x x T x x M x x N x x K a hh The two underlined fields contain the true and magnetic course over ground data Both values must be present in order for this sentence to be used for magnetic variation Manual Variation 1 2 Connect the SSC300 to the PC s serial port and obtain the cmd gt prompt per the instructions in Appendix C To program the SSC300 with a manually magnetic variation value type the following sentence Revision 1 0 Appendix D Transmitting True Heading Data Page D1 SSC300 User s Manual SPMAREXE SSC300 5D 0 lt variation gt Where lt variation gt is the magnetic variation in units of degrees and resolution in tenth of degrees p
38. ly transmit this PGN depending on whether or not it has been programmed with the local magnetic variation Programming the magnetic variation through a Maretron display product like the DSM150 DSM250 or N2KAnalyzer software will cause the SSC300 to transmit this PGN once per second If the local magnetic variation is not known then the variation can be disabled again through a display product like the DSM150 DSM250 or N2KAnalyzer software at which time the SSC300 will cease to transmit this PGN Field 1 SID The sequence identifier field is used to tie related PGNs together For example the SSC300 will transmit identical SIDs for Vessel Heading PGN 127250 Attitude 127257 and Rate of Turn 127251 to indicate that the readings are linked together i e the data from each PGN was taken at the same time although they are reported at slightly different times Variation Source This field always contains a value of 0x00 manual entry Reserved This field is reserved by NMEA therefore the SSC300 sets all bits to a logic 1 4 Age of Service This field always contains a value of Ox7FFF data not available 5 Variation This field is used to report the local magnetic variation as entered by the user Positive values are Easterly and negative values are Westerly N WARNING Magnetic variation changes as your location on the earth changes and it should be adjusted with these changes Neither the DSM150 DSM2
39. magnetometers the Heading Sensor Reference field 5 is always set to magnetic Field 1 SID The sequence identifier field is used to tie related PGNs together For example the SSC300 will transmit identical SIDs for Vessel Heading PGN 127250 Attitude 127257 and Rate of Turn 127251 to indicate that the readings are linked together i e the data from each PGN was taken at the same time although they are reported at slightly different times 2 Heading Sensor Reading This field is used to report the vessel s heading and includes deviation assuming a deviation table has been successfully loaded through the magnetic deviation calibration process 3 Deviation The deviation is included in field 2 therefore this field always reads as 0 4 Variation The SSC300 does not use this field so the field is transmitted with the value 0x7FFF data not available See PGN 127258 for information regarding the SSC300 and its ability to transmit magnetic variation 5 Heading Sensor Reference The SSC300 transmits a 1 in this field to indicate that the heading is referenced to magnetic North 6 Reserved This field is reserved by NMEA therefore the SSC300 sets all bits to a logic 1 PGN 127251 Rate of Turn The SSC300 uses this PGN to indicate the vessel s rate of turn Field 1 SID The sequence identifier field is used to tie related PGNs together For example the SSC300 will transmit identical SIDs for Ves
40. n environment may be seen using a Maretron display product e g DSM150 DSM250 or N2KAnalyzer software This allows you to compare different installation points on a vessel to determine the optimum location for the SSC300 Page 12 Revision 1 0 Maretron 3 3 2 Automatic Power Up Deviation Calibration Automatic power up deviation calibration is accomplished by turning the vessel through four complete circles within 10 minutes of power up 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 21 2 minutes or less try not to go below 1 minute for a complete circle 4 While continuing to turn the vessel as indicated in step 3 remove the power from the compass and reapply power this initiates deviation calibration 5 Continue turning the vessel through four complete circles in less than 10 minutes from the time power was applied 6 Successful deviation is indicated when the SSC300 outputs the following sequence a 0 Degrees for two seconds followed by b 90 degrees for two seconds followed by c 180 degrees for two seconds followed by d 270 degrees for two seconds followed by the actual heading While turning the vessel try to maintain a circle by holding the rudder at a constant angle In addition try to minimize the vessel s pitch and
41. n of an RMC or VTG sentence to produce true heading IIHDT A B hh lt CR gt lt LF gt Field A Null unless receiving variation from RMC and VTG in which case magnetic heading including deviation and variation in tenths of degrees B This field always contains a T indicating true magnetic heading ROT Rate of Turn The SSC300 indicates the vessel s rate of turn 5 times a second IIROT A B hh lt CR gt lt LF gt Field A Rate of turn in degrees minute where indicates the bow turning to port B This field indicates whether data is valid an A indicates that the data is valid where a V indicates invalid data MAROUT Maretron Proprietary Output Sentence Since there is no standard NMEA 0183 sentence for indicating the vessel s attitude pitch and roll the SSC300 uses a proprietary sentence to indicate pitch and roll one time per second PMAROUT A B C D E F G H l hh lt CR gt lt LF gt Field A Always reads ATT to indicate following data is associated with the vessel s attitude B Pitch angle in tenths of degrees where indicates bow pitches downward C Roll angle in tenths of degrees where indicates roll to the port Revision 1 0 Appendix A NMEA 0183 Interfacing Page A1 SSC300 User s Manual D I Null TXT Text Transmission The SSC300 transmits various status messages using the text transmission sentence IITXT A B C D hh lt CR gt lt LF gt Field A B Alw
42. n on how to properly connect the device to the SSC300 The individual wires found within the cable have the following color coding Wire Color Name Description Gray TXA Transmit Differential Output A Signal Brown TXB Transmit Differential Output B Signal Blue RXA Receive Differential Input A Signal White RXB Receive Differential Input B Signal Figure 7 NMEA 0183 Cable Wire Color Coding 2 4 2 1 Power Connections If the NMEA 2000 interface is connected power is supplied to the SSC300 through the NMEA 2000 network connection If only the NMEA 0183 interface is used power connections must be made via the NMEA 2000 Power connector Using the optional FA CF ST Micro Field Attachable Connector Female connect a cable containing two power wires not included to pins 2 and 3 of the field attachable connector only the two power pins need be connected as shown in Figure 4 on Page 8 Revision 1 0 Maretron page 7 assemble the connector per the instructions packaged with the connector and screw the connector snugly into the NMEA 2000 Power connector on the SSC300 as shown in Figure 8 below Please ensure that the cable has at least a 6mm diameter to ensure a watertight seal to the Field Attachable Connector Field Attachable Connector gt Minimum 6mm Diameter gt gt i NMEA 0183 Connection 12V Ground Power Connection Figure 8 SSC300 with NME
43. nal software chart plotters autopilots and dedicated instrument displays including Maretron s graphical displays and N2KView software The SSC300 can be automatically calibrated for deviation Its dynamic accuracy is improved with advanced digital filtering of the 3 axis magnetometer 3 axis accelerometer and 3 axis rate gyro The SSC300 is engineered and manufactured to the highest standards IEC 60945 Maritime Navigation and Radiocommunication Equipment Its compact waterproof housing will provide years of reliable performance The Maretron SSC300 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 SSC300 in order to ensure optimal performance 1 2 Firmware Revision This manual corresponds to SSC300 firmware revision 1 0 1 3 Features The Maretron SSC300 Solid State Compass has the following features e Better than 0 7 heading accuracy in status conditions e Better than 1 5 heading accuracy in dynamic conditions e Better than 1 second rate of turn accuracy Revision 1 0 Page 1 SSC300 User s Manual e Better than 1 pitch roll accuracy e Three axis magnetometer Three axis rate gyro and Three axis accelerometer e Outputs NMEA 0183 and NMEA 200
44. nfiguring the SSC300 to Transmit the HDT Sentence for Page iv Revision 1 0 Maretron 1 General 1 1 Introduction Congratulations on your purchase of the Maretron SSC300 Solid State Rate Gyro Compass Maretron has designed and built your compass to the highest standards for years of reliable dependable and accurate service Maretron s SSC300 implementing the second generation of Maretron s award winning solid state compass technology is a solid state rate gyro electronic compass that provides better than 0 7 heading accuracy through 45 of roll and pitch angle and better than 1 roll and pitch accuracy in static conditions Each SSC300 is factory calibrated for maximum accuracy It delivers precise reliable heading and rate of turn information ten times per second and vessel attitude including pitch and roll readings once per second A micromachined 3 axis rate gyro is used in conjunction with the 3 axis accelerometer by advanced stabilization algorithms to provide accurate stable readings during dynamically changing conditions such as hard turns or rough seas making it an ideal heading sensor for autopilot or radar overlay applications Maretron s SSC300 is certified to the NMEA 2000 network standard and compatible with the NMEA 0183 digital interface standard It connects directly with any NMEA 2000 network and with the optional NMEA 0183 cable accessory with NMEA 0183 listeners to share information with navigatio
45. nitiated Deviation Calibration NMEA 0183 initiated deviation calibration is accomplished by turning the vessel through at least 3 complete circles after the SSC300 receives a Maretron proprietary NMEA 0183 sentence 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 212 minutes or less try not to go below 1 minute for a complete circle 4 Send the following Maretron proprietary NUEA0183 sentence to the SSC300 while continuing to turn the vessel a PMAREXE SSC300 FD 0 lt CR gt lt LF gt This will turn off all periodic transmissions such that you can easily see status messages associated with the calibration process b PMAREXE SSC300 F0 lt CR gt lt LF gt This will initiate a reset and force the SSC300 to start the calibration process Revision 1 0 Appendix A NMEA 0183 Interfacing Page A5 SSC300 User s Manual 5 Continue turning the vessel through at least 3 circles until you see one of the following Maretron proprietary sentences a IITXT 01 01 02 Deviation Calibration Successfully Completed 17 lt CR gt lt LF gt This sentence indicates a successful calibration and you can jump to step number 6 b IITXT 01 01 03 Deviation Calibration Failed To Complete 43 lt CR gt lt LF gt This sentence indicates that the calibration faile
46. ond The deviation field always contains zero as the SSC300 reports it s heading with the deviation included The variation field will normally contain the null character however if the SSC300 receives either a valid RMC or VTG sentence then the SSC300 will fill the variation field appropriately IIHDG A B C D E hh lt CR gt lt LF gt Field A Magnetic heading sensor including deviation in tenths of degrees Deviation always reads 0 0 because it is included in field A Although this field reads as E it is meaningless as the deviation is always zero Null unless receiving variation data form RMC or VTG sentence in which case variation data Null unless receiving variation data from RMC or VTG sentence in which case E or W depending on direction of variation m0 HDM Heading Magnetic The SSC300 does not normally transmit this sentence because it is no longer recommended for new designs by NMEA However this sentence can be enabled or turned on via a proprietary NMEA 0183 sentence see PMARSETP definition IIHDM A B hh lt CR gt lt LF gt Field A Magnetic heading sensor including deviation in tenths of degrees B This field always contains an M indicating magnetic heading HDT Heading True The SSC300 does not normally transmit this sentence However this sentence can be enabled or turned on via a proprietary NMEA 0183 sentence see PMARSETP definition The HDT sentence works in collaboration with the receptio
47. ond At 0 Pitch and Roll Rate of Turn Accuracy 1 per Second 0 Pitch and Roll 15 C to 35 C Rate of Turn Update Rate 10 per Second Adjustable up to 40 per Second NMEA 0183 Standard Compatible Up to 38 400 Baud 40 Hz Update Rate Certifications Parameter Comment NMEA 2000 Standard Level A Maritime Navigation and Radiocommunication Equipment amp Systems IEC 61162 3 Maritime Navigation and Radiocommunication Equipment amp Systems Tested to IEC 60945 FCC and CE Mark Electromagnetic Compatibility NMEA 2000 Parameter Group Numbers PGNs See Appendix B for Details Description PGN PGN Name Default Rate Periodic Data PGNs 127250 Vessel Heading 10 Times Second 127257 Attitude 1 Time Second 127251 Rate of Turn 10 Times Second Response to Requested PGNs 126464 PGN List Transmit and Receive N A 126996 Product Information N A 126998 Configuration Information N A Protocol PGNs 059392 ISO Acknowledge N A 059904 ISO Request N A 060416 ISO Transport Protocol Connection N A Management 060160 ISO Transport Protocol Data Transfer N A 060928 ISO Address Claim N A 065240 ISO Address Command N A 126208 NMEA Request Command Acknowledge N A Maretron Proprietary PGNs 126720 Configuration N A Revision 1 0 Page 19 SSC300 User s Manual NMEA 0183 Sentences See Appendix A for Details
48. ositive values represent easterly variation and negative values represent westerly variation For example to program the SSC300 with 18 0 easterly magnetic variation as might be seen in Seattle WA USA type the sentence SPMAREXE SSC300 5D 0 18 0 To program the SSC300 with 5 5 westerly magnetic variation as might be seen on the east coast of Florida USA type the sentence SPMAREXE SSC300 5D 0 5 5 5 The SSC300 should now be transmitting true heading data Examine the NMEA 0183 sentences coming from the SSC300 or check the heading indication on the system connected to the NMEA 0183 output of the SSC300 for true heading data Page D2 Appendix D Transmitting True Heading Data Revision 1 0 Maretron Appendix E Configuring the SSC300 to Transmit the HDT Sentence for Satellite Antennas and Radars The SSC300 is factory configured to transmit the HDG sentence 10 times per second However certain satellite antennas and radars need the HDT sentence This application note explains how to change the transmitted sentence from to HDT Prerequisites e The SSC300 compass must have firmware revision 1 7 or greater e The SSC300 compass must have a GPS source for magnetic variation information or must be manually programmed with the local magnetic variation Please see Maretron Application Note 2 Configuring the SSC300 to transmit True Heading Data Instructions 1 Connect the SSC300 to th
49. r s Manual 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 B3 for complete description of PGN 126270 Field 1 Complex Command Group Function Code 8 bits set this field s value to 0x01 which denotes a command PGN 2 Commanded PGN 24 bits set this field s value to 126720 decimal 0x1EF00 hexadecimal which denotes the Maretron proprietary PGN 3 Priority Setting 4 bits set this field s value to 0x8 which indicates to leave priority settings unchanged 4 Reserved 4 bits set this field s value to OxF which is the value for a reserved field of this size 5 Number of Pairs of Commanded Parameters to Follow 8 bits set this field s value to 0x4 indicating that four parameters will follow Number of First Commanded Parameter 8 bits set this field s value to 0x1 Maretron Vendor ID and Industry Code 16 bits set this field to 0x9889 which is a combination of Maretron s vendor ID and the marine industry code 8 Number of Second Commanded Parameter 8 bits set this field s value to 0x02 9 Product Code 16 bits set this field s value to 0x1B2 which is the NMEA 2000 product code for the SSC300 10 Number of T
50. rade literature brochures or other documentation shall be construed as warranties of any kind and any failure to conform with such specifications samples descriptions or illustrations shall not constitute any breach of Maretron s limited warranty Warranty Return Procedure To apply for warranty claims contact Maretron or one of its dealers to describe the problem and determine the appropriate course of action If a return is necessary place the product in its original packaging together with proof of purchase and send to an Authorized Maretron Service Location You are responsible for all shipping and insurance charges Maretron will return the replaced or repaired product with all shipping and handling prepaid except for requests requiring expedited shipping i e overnight shipments Failure to follow this warranty return procedure could result in the product s warranty becoming null and void Maretron reserves the right to modify or replace at its sole discretion without prior notification the warranty listed above To obtain a copy of the then current warranty policy please go to the following web page http Awww maretron com company warranty php Revision 1 0 Page 23 SSC300 User s Manual This page intentionally left blank Page 24 Revision 1 0 Maretron Appendix A NMEA 0183 Interfacing SSC300 NMEA 0183 Transmitted Sentences HDG Heading Deviation amp Variation The SSC300 indicates heading 10 times a sec
51. re that the unit is mounted securely and cannot be moved relative to the mounting surface If the unit is loose tighten the mounting screws and repeat the magnetic deviation calibration and installation offset correction e Check the security of the cables connected to the NMEA 2000 and or NMEA 0183 interfaces and tighten if necessary Revision 1 0 Page 17 SSC300 User s Manual 7 Troubleshooting If you notice unexpected operation of the Maretron SSC300 follow the troubleshooting procedures in this section to remedy simple problems No heading output Check the connections to the NMEA 2000 Power connector and or NMEA 0183 Connector and tighten if necessary Ensure that power is supplied to the connected NMEA 2000 or NMEA 0183 cable For NMEA 0183 connections ensure that the SSC300 is programmed to transmit the appropriate type of sentence HDT HDG or HDM required by the connected equipment If the HDT sentence is being transmitted ensure that the SSC300 is provided with a source of magnetic variation information so that it can calculate true heading from the magnetic heading Inaccurate heading output Ensure the SSC300 is still mounted securely Ensure the SSC300 is still in a clean magnetic environment and that no power or ignition cables or magnetic or ferrous objects have been moved near the SSC300 Repeat the magnetic deviation compensation and installation offset correction procedures Figure 9 Trouble
52. roll by calibrating on calm flat water 3 4 Installation Offset Correction Second Time After installation and successful magnetic deviation calibration it is important to repeat installation offset correction so that the displayed compass heading pitch and roll match the actual vessel heading pitch and roll Please refer to Section 3 2 for details on how to perform the procedure 4 Variation Variation is the angular difference between the true meridian great circle connecting the geographic poles and the magnetic meridian direction of the lines of magnetic flux Variation has different values at different locations on the earth with most areas undergoing change to the variation over time Normally heading information is displayed as either a true heading a direction relative to the geographic poles or it is displayed as a magnetic heading a direction relative to the lines of magnetic flux North seeking gyrocompasses are capable of measuring direction relative to the geographic poles true whereas magnetic compasses measure direction relative to the earth s local magnetic flux magnetic The SSC300 is a magnetic compass therefore it requires an external source for variation if you want to view your heading in true format The SSC300 is capable of receiving variation in one of three ways 1 via the NMEA 0183 interface 2 via the NMEA 2000 interface or 3 through manual variation entry
53. sel Heading PGN 127250 Attitude 127257 and Rate of Turn 127251 to indicate that the readings are linked together i e the data from each PGN was taken at the same time although they are reported at slightly different times Rate of Turn This field is used to report the vessel s rate of turn Reserved This field is reserved by NMEA therefore the SSC300 sets all bits to a logic 1 N PGN 127257 Attitude The SSC300 uses this PGN to indicate the vessel s attitude pitch and roll The Yaw field 2 is not used therefore this field always contains Ox7FFF data not available Field 1 SID The sequence identifier field is used to tie related PGNs together For example the SSC300 will transmit identical SIDs for Vessel Heading PGN 127250 Attitude 127257 and Rate of Turn 127251 to indicate that the readings are linked together i e the data from each PGN was taken at the same time although they are reported at slightly different times Revision 1 0 Appendix B NMEA 2000 Interfacing Page B1 SSC300 User s Manual Yaw This field always contains a value of Ox7FFF data not available Pitch This field is used to report the vessel s pitch Roll This field is used to report the vessel s roll Reserved This field is reserved by NMEA therefore the SSC300 sets all bits to a logic 1 o1 BR OW P PGN 127258 Magnetic Variation The SSC300 may or may not periodical
54. ses the SSC300 to use variation data from the NMEA 2000 interface and ignore all other variation sources i e NMEA 0183 interface and manual entries Revision 1 0 Appendix A NMEA 0183 Interfacing Page A3 SSC300 User s Manual PMAREXE SSC300 5D 2 lt CR gt lt LF gt This command causes the SSC300 to use variation data from the NMEA 0183 interface and ignore all other variation sources i e NMEA 2000 interface and manual entries PMAREXE SSC300 5D 3 lt CR gt lt LF gt This command causes the SSC300 to be set back to the factory default where variation data is used from either the NMEA 0183 interface or the NMEA 2000 interface PMAREXE SSC300 5E 2 damping period lt CR gt lt LF gt This command causes the SSC300 to use a rate of turn damping rate corresponding to the value programmed in damping period The damping period is programmable from 100 to 60000 which represents 100ms to 60 seconds PMAREXE SSC300 5E 11 lt CR gt lt LF gt This command causes the SSC300 to zero the rate of turn indication and record the compensation value used along with the current operating temperature of the compass The boat must remain at rest for a period of one minute after this command is issued PMAREXE SSC300 5E 12 lt CR gt lt LF gt This command causes the SSC300 to cancel any rate of turn zeroing operations currently in progress PMAREXE SSC300 50 lt CR gt lt LF gt Will cause the
55. set and force the SSC300 to start the calibration process Field 1 2 gi 10 12 Revision 1 0 Complex Command Group Function Code 8 bits set this field s value to 0x01 which denotes a command PGN Commanded PGN 24 bits set this field s value to 126720 which denotes the Maretron proprietary PGN Priority Setting 4 bits set this field s value to 0x8 which indicates to leave priority settings unchanged Reserved 4 bits set this field s value to OxF which is the value for a reserved field of this size Number of Pairs of Commanded Parameters to Follow 8 bits set this field s value to 0x4 indicating that four parameters will follow Number of First Commanded Parameter 8 bits set this field s value to 0x1 Maretron Vendor ID and Industry Code 16 bits set this field s value to 0x9889 Number of Second Commanded Parameter 8 bits set this field s value to 0x02 Product Code 16 bits set this field s value to 0x1B2 which is the NMEA 2000 product code for the SSC300 Number of Third Commanded Parameter 8 bits set this field s value to 0x03 Software Code 16 bits set this field s value to 0x0001 which is the identifier for this version of the Maretron proprietary protocol Maretron Command set this field s value to OxFO which will initiate a reset and start the calibration process Appendix B NMEA 2000 Interfacing Page B3 SSC300 Use
56. shooting Guide If these steps do not solve your problem please contact Maretron Technical Support refer to Section 9 for contact information Warning There are no user serviceable components inside the Maretron SSC300 Opening the SSC300 will expose the sensitive electronic components to movement and adverse environmental conditions that may render the compass inoperative Please do not open the SSC300 as this will automatically void the warranty If service is required please return the unit to an authorized Maretron service location Page 18 Revision 1 0 8 Technical Specifications Specifications Maretron Parameter Value Comment Static Heading Accuracy lt 0 7 RMS 45 Pitch and Roll 15 C to 35 C Dynamic Heading Accuracy lt 1 5 RMS Heading Display Resolution 0 1 With Maretron Display Settling Time 1 Second To Static Accuracy after 35 Second Turn Heading Update Rate 10 per Second Adjustable up to 40 per Second Heading Deviation Yes Automatic Alignment Calibration Yes In Boat Calibration with Maretron Displays Pitch and Roll Range 80 With Maretron Display Pitch and Roll Accuracy 1 45 Pitch and Roll 15 C to 35 C Pitch and Roll Display Resolution 0 1 With Maretron Display Pitch and Roll Update Rate 1 per Second Adjustable up to 40 per Second Pitch and Roll to Boat Alignment Yes In Boat Calibration with Maretron Displays Rate of Turn Range 0 250 Sec
57. sion 1 0 Page 15 SSC300 User s Manual 4 4 1 Variation Source Selection via Maretron Display You can program the SSC300 to use a particular variation source using a Maretron display product e g DSM150 DSM250 or N2KAnalyzer software Refer to the display product user s manual for details on programming the SSC300 to use a specific variation source 4 4 2 Variation Source Selection via NMEA 0183 Interface You can program the SSC300 to use a particular variation source through the NMEA 0183 interface Refer to Appendix A for details on programming the SSC300 to use a specific variation source 5 Rate of Turn The SSC300 is capable of measuring a vessel s rate of turn and outputting the information over both the NMEA 0183 and NMEA 2000 interfaces Furthermore the SSC300 has a programmable damping period where the filter time can be increased for very slow turning vessels such as tugs pushing barges Also the SSC300 rate of turn indication may be zeroed to correct for any temperature induced offset The SSC300 can be programmed with different damping periods and have the rate of turn indication zeroed using one of two possible procedures 1 Using a Maretron Display Section 5 1 2 Through the NMEA 0183 Interface Section 5 2 5 1 Rate of Turn Damping Period Selection with Maretron Display You can program the SSC300 to use a particular rate of turn damping period using a Maretron display product e g DSM150 DSM250 or N2K
58. tion to fail to meet the above limited warranty such products shall be repaired or replaced at Maretron s option Purchaser s exclusive remedy and Maretron s sole obligation hereunder provided product is returned pursuant to the return requirements below shall be limited to the repair or replacement at Maretron s option of any product not meeting the above limited warranty and which is returned to Maretron or if Maretron is unable to deliver a replacement that is free from defects in materials or workmanship Purchaser s payment for such product will be refunded Maretron assumes no liability whatsoever for expenses of removing any defective product or part or for installing the repaired product or part or a replacement therefore or for any loss or damage to equipment in connection with which Maretron s products or parts shall be used With respect to products not manufactured by Maretron Maretron s warranty obligation shall in all respects conform to and be limited to the warranty actually extended to Maretron by its supplier The foregoing warranties shall not apply with respect to products subjected to negligence misuse misapplication accident damages by circumstances beyond Maretron s control to improper installation operation maintenance or storage or to other than normal use or service THE FOREGOING WARRANTIES ARE EXPRESSLY IN LIEU OF AND EXCLUDES ALL OTHER EXPRESS OR IMPLIED WARRANTIES INCLUDING BUT NOT LIMITED TO THE IMP
59. transmission of the HDT sentence at intervals of 100 ms PMARSETPX SSC300 02 100 7 To disable transmission of the ROT sentence PMARSETPX SSC300 03 0 8 To enable transmission of the ROT sentence at intervals of 100 ms PMARSETPX SSC300 03 100 9 To disable transmission of the PMAROUT sentence PMARSETPX SSC300 04 0 10 To enable transmission of the PMAROUT sentence at intervals of 1 sec PMARSETPX SSC300 04 1000 PMARSETP Maretron Proprietary Set Period Sentence NOTE This sentence is included for compatibility with older versions of SSC300 firmware The PMARSETPX sentence offers finer resolution and should be used if available The SSC300 can be programmed to enable or disable the periodic transmission of the HDG HDM HDT ROT and PMAROUT sentences In addition the periodic transmission rate for these sentences and the Variation Lifetime see RMC and VTG can be programmed using this sentence PMARSETP SSC300 A B hh lt CR gt lt LF gt Field A Identifier code identifies the sentence or parameter to be programmed see following table B Integer where 0 disables sentence and positive numbers are multipliers of 1ms i e programmed integer of 2 would mean a 200ms transmission interval Identifier Code Sentence Default Rate 00 HDG 1 or 100ms 01 HDM 0 or Disabled 02 HDT 0 or Disabled 03 ROT 2 or 200ms 04 PMAROUT 10 or 1sec OA Variation Lifetime 50 or 5sec SSC300 NMEA 0183 I
60. tted with the lowest possible quality indicator which is Manual Entry WARNING Magnetic variation changes as your position on the earth changes therefore the variation should be adjusted with changes in position The SSC300 will not automatically adjust variation with changes in position it is the responsibility of the user to adjust variation with changes in position 4 4 Variation Source Selection As shipped from the factory the SSC300 automatically looks for variation from both the NMEA 0183 and NMEA 2000 interfaces If there is only a single source of variation available either from the NMEA 0183 or the NMEA 2000 interface then there is no need to manually select a variation source However if there are multiple variation sources i e variation available from both the NMEA 0183 and NMEA 2000 interfaces or there is no source for variation i e variation is not available from either the NMEA 0183 or the NMEA 2000 interfaces then it is necessary to select a particular variation source The SSC300 can be programmed to specifically use one of three possible variation sources 1 Variation from Only NMEA 0183 Interface 2 Variation from Only NMEA 2000 Interface 3 Variation from Only Manual Entry The SSC300 can be programmed to accept a specific source for the variation data using one of two possible procedures 1 Using a Maretron Display Section 4 4 1 2 Through the NMEA 0183 Interface Section 4 4 2 Revi
61. ual 3 Through the NMEA 0183 Interface Appendix A 4 Through the NMEA 2000 Interface Appendix B All the procedures require that the vessel be turned in consecutive circles during which time the SSC300 uses changing heading information along with readings from the angular rate sensor to calculate hard and soft iron magnetic deviation Upon a successful completion of deviation calibration the SSC300 stores the deviation values in permanent memory for subsequent compensation Under certain conditions e g turning to fast or to slow the SSC300 will not successfully complete the calibration process and the SSC300 will not store the deviation values in its permanent memory Therefore it is important to verify that the deviation calibration process completed successfully The preferred method for deviation calibration is to use a Maretron display procedure 1 because you receive direct feedback on the calibration process with a clear indication of a successful or unsuccessful deviation calibration Deviation calibration done automatically at power up procedure 2 is less desirable than procedure 1 because it is more difficult to verify that a successful deviation calibration completed As an alternative to procedures 1 and 2 users with direct access to the NMEA 0183 and NMEA 2000 interfaces can perform magnetic deviation calibration directly through the NMEA 0183 interface see Appendix A or the NMEA 2000 interface see Appendix B These
62. uld be Page 2 Revision 1 0 Maretron 1 Level with the Earth s Horizontal Plane Although the SSC300 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 SSC300 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 SSC300 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 SSC300 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
63. ust be calibrated in the vessel after installation The three calibration procedures that must be carried out are rate of turn zero offset calibration Section 3 1 magnetic deviation calibration Section 3 2 and installation offset correction Section 3 4 These procedures should be carried out after the initial compass installation and again at any time that the magnetic environment of the vessel has changed significantly for example new cables have been routed near the compass or new equipment made of ferrous metal has been installed near the compass WARNING It is imperative that calibration procedures be carried out upon installation of the SSC300 to ensure accurate readings 3 1 Rate of Turn Zero Offset Calibration Since the SSC300 uses the internal rate of turn gyros during the magnetic deviation calibration process the rate of turn gyros need to zeroed first It is possible to do Rate of Turn Zeroing using a Maretron display product such as the DSM150 DSM250 or N2KAnalyzer software please refer to the display product user s manual for details 3 2 Installation Offset Correction First Time After installation and prior to magnetic deviation calibration it is important to perform installation offset correction so that the compass is aware of its exact orientation in the installation The heading is also set during this process but will be set once more after magnetic deviation calibration Installation offset corre

SSC300 Solid State Rate/Gyro Compass User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents