Raymarine GPS Receiver Heading Sensor User Guide

Heading Sensor  
Owner’s  
Handbook  
Document number: 81124_3  
Date: 1st May 2001  
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i
Preface  
Important information  
WARNING  
Although your Heading Sensor is designed to give accurate and  
reliable performance, it should serve only as an aid to navigation  
and should never lead to the erosion of good seamanship. Always  
maintain a permanent watch and be aware of situations as they  
develop.  
EMC conformance  
All Raymarine equipment and accessories are designed to the best  
industry standardsfor usein theleisure marine environment.  
The design and manufacture of Raymarine equipment and accessories  
conform to the appropriate Electromagnetic Compatibility (EMC)  
standards, but correct installation is required to ensure that performance  
is not compromised.  
Handbook information  
To the best of our knowledge, the information in this handbook was  
correct when it went to press. However, the Raymarine policy of  
continuous productimprovementmaychangeproductspecifications  
withoutnotice. Consequently, unavoidabledifferencesmayoccur  
between the product and the handbook from time to time, for which  
Raymarinecannotacceptliability  
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HeadingSensorOwnersHandbook  
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iii  
Preface  
Contents  
Important information ..........................................................i  
WARNING......................................................................... i  
EMC conformance ............................................................. i  
Handbook information ....................................................... i  
Chapter 1: Introduction ......................................................... 1  
1.1 Handbook information ................................................ 1  
1.2 Description .................................................................. 1  
Chapter 2: Maintenance & Fault Finding ............................ 3  
2.1 Servicing and Safety ................................................... 3  
2.2 Maintenance ................................................................ 3  
2.3 Fault Finding ............................................................... 4  
Assistance .................................................................... 4  
Chapter 3: Installation........................................................... 5  
3.1 Before you Begin ........................................................ 5  
Components................................................................. 5  
Basic Installation Tools ............................................... 5  
EMC Installation Guidelines ....................................... 5  
Suppression Ferrites .............................................. 6  
Connections to Other Equipment........................... 7  
3.2 Siting the Heading Sensor ........................................... 7  
3.3 Installation Procedure ................................................. 8  
3.4 Connection Procedure ................................................. 9  
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HeadingSensorOwnersHandbook  
Chapter 4: Calibration ......................................................... 11  
4.1 Introduction............................................................... 11  
EMC Conformance ................................................... 11  
4.2 Continuous Deviation Correction ............................. 11  
4.3 Heading Alignment ................................................... 12  
Heading Sensor Specification ............................................ 15  
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1
Chapter1:Introduction  
Chapter 1:Introduction  
Thank you for purchasing a Raymarine product. We are sure your  
Heading Sensor will give you many years of trouble-free operation.  
This Heading Sensor is designed to provide reliable performance, even  
underthemostdemandingconditions.  
1.1 Handbook information  
This handbook contains important information on the installation,  
calibration and maintenance of your Heading Sensor. Please read the  
handbook thoroughly, so that you get the best results from this product.  
1.2 Description  
The Raymarine Heading Sensor consists of an oil-filled sphere  
suspended in a custom built “swing bracket”, together with associated  
electronics.  
The Heading Sensor transmits magnetic compass heading data to  
equipment that is NMEA 0183 compatible, such as radars, RayData  
displays, andRayPilotautopilotsystems.  
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HeadingSensorOwnersHandbook  
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Chapter 2: Maintenance & Fault Finding  
Chapter 2:Maintenance & Fault Finding  
2.1 Servicing and Safety  
Raymarine equipment should be serviced only by authorized  
Raymarineservicetechnicians. Theywillensurethatservice  
procedures and replacement parts used will not affect performance.  
There are no user serviceable parts in any Raymarine product.  
Some products generate high voltages, so never handle the cables/  
connectors when power is being supplied to the equipment.  
When powered up, all electrical equipment produces  
electromagnetic fields. These can cause adjacent pieces of electrical  
equipment to interact with one another, with a consequent adverse  
effect on operation. In order to minimise these effects and enable  
you to get the best possible performance from your Raymarine  
equipment, guidelines are given in the installation instructions, to  
enableyoutoensureminimuminteractionbetweendifferentitems  
ofequipment, i.e. ensureoptimumElectromagneticCompatibility  
(EMC).  
Always report any EMC-related problem to your nearest Raymarine  
dealer. We use such information to improve our quality standards.  
In some installations, it may not be possible to prevent the  
equipment from being affected by external influences. In general  
this will not damage the equipment but it can lead to spurious  
resettingaction, ormomentarilymayresultinfaultyoperation.  
AlwaysswitchoffthepowertoRaymarineequipmentbefore  
workingonit.  
2.2 Maintenance  
The Raymarine Heading Sensor is a sealed unit. Maintenance  
procedures are therefore limited to the following periodical checks:  
Examine the cable for signs of damage, such as chafing, cuts or  
nicks  
Make sure that the Heading Sensor is still attached securely to the  
bulkhead  
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HeadingSensorOwnersHandbook  
2.3 Fault Finding  
All Raymarine products are subjected to comprehensive test and  
quality assurance programmes, prior to packing and shipping.  
However, if your Heading Sensor should develop a fault , please refer  
to the following table to identify the most likely cause and the  
corrective action required to restore normal operation.  
Problem  
Correction  
No compass heading data available.  
Check that the cable connecting the  
Heading Sensor to the NMEA  
instrument or system is firmly attached  
and undamaged.  
The compass heading displayed on  
the associated instrument is not the  
same as the ships compass.  
Heading Sensor has not been linearised.  
Linearisation procedure unsuccessful.  
Move the Heading Sensor to a new  
location and try again.  
Assistance  
If you still have a problem after referring to the table above, contact  
your local dealer or Raymarine Product Support Department for further  
advice.  
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Chapter 3: Installation  
Chapter 3: Installation  
This chapter describes how to install the Heading Sensor, using  
everyday hand tools.  
3.1 Before you Begin  
Before you begin, make sure that you have the all the required  
components and tools (listed below) to hand.  
Note: Before attempting any installation, you should read the  
Electromagnetic Compatibility (EMC) installation and service  
guidelines provided under EMC Installation Guidelines.  
Components  
The Raymarine Heading Sensor includes the following standard  
components:  
HeadingSensor  
• “Swingbracket  
Self tapping screws (4)  
6ft (2m) cable, with molded Heading Sensor plug on one end  
If you are installing the Heading Sensor at a distance from an NMEA  
instrument or system, you may also need a 16.25ft (5m) NMEA  
accessory cable.  
Basic InstallationTools  
Cross head screwdriver  
Electric/handdrill  
1mm (0.39in) drill bit  
EMC Installation Guidelines  
All Raymarine equipment and accessories are designed to the best  
industry standards for use in the recreational marine environment.  
Their design and manufacture conforms to the appropriate  
Electromagnetic Compatibility (EMC) standards, but correct  
installation is required to ensure that performance is not compromised.  
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HeadingSensorOwnersHandbook  
Although every effort has been taken to ensure that they will perform  
under all conditions, it is important to understand what factors could  
affect the operation of the product.  
The guidelines given here describe the conditions for optimum EMC  
performance, but it is recognized that it may not be possible to meet all  
of these conditions in all situations. To ensure the best possible  
conditions for EMC performance within the constraints imposed by  
anylocation, alwaysensurethemaximumseparationpossiblebetween  
different items of electrical equipment.  
For optimum EMC performance, it is recommended that wherever  
possible:  
Raymarine equipment and cables connected to it are:  
At least 3 ft (1 m) from any equipment transmitting or cables  
carrying radio signals e.g. VHF radios, cables and antennas. In  
the case of SSB radios, the distance should be increased to 7 ft  
(2 m).  
More than 7 ft (2 m) from the path of a radar beam. A radar  
beam can normally be assumed to spread 20 degrees above and  
belowtheradiatingelement.  
The equipment is supplied from a separate battery from that used for  
engine start. Voltage drops below 10 V in the power supply to our  
products, and starter motor transients, can cause the equipment to  
reset. This will not damage the equipment, but may cause the loss of  
some information and may change the operating mode.  
Raymarine specified cables are used. Cutting and rejoining these  
cables can compromise EMC performance and must be avoided  
unless doing so is detailed in the installation manual.  
If a suppression ferrite is attached to a cable, this ferrite should not  
be removed. If the ferrite needs to be removed during installation it  
must be reassembled in the same position.  
Suppression Ferrites  
The following illustration shows typical cable suppression ferrites used  
withRaymarineequipment. Alwaysusetheferritessuppliedby  
Raymarine.  
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Chapter 3: Installation  
D3548-2  
Connections to Other Equipment  
If your Raymarine equipment is to be connected to other equipment  
using a cable not supplied by Raymarine, a suppression ferrite MUST  
always be attached to the cable near the Raymarine unit.  
3.2 Siting the Heading Sensor  
The Heading Sensor must be fitted to a vertical or horizontal bulkhead  
(preferably forward facing), away from large ferrous objects such as the  
engine and other magnetic devices.  
If you have any doubts about the magnetic suitability of a chosen  
location, attach a hand bearing compass to the chosen site and then turn  
yourvesselthrough360°. Differencesbetweenthehand-bearing  
compass and the boats compass should not exceed 10°on any heading.  
The Heading Sensor should be positioned as close as possible to the  
pitch and roll centre of the vessel, as shown in the following diagram.  
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HeadingSensorOwnersHandbook  
0.3L to 0.5L  
L
0.3L to 0.5L  
L
D194-2  
The compass is normally bulkhead mounted below decks. However, it  
can be mounted above deck on steel vessels. Although it is  
weatherproof, performance may be impaired due to the increased  
motion if it is mounted above deck.  
3.3 Installation Procedure  
To install the heading Sensor:  
1. Hold the Heading Sensor mounting bracket (4) against the  
selected bulkhead.  
2. OutlinethefourfixingholesintheHeadingSensormounting  
bracket (4).  
3. Drill four pilot holes for the self-tapping screws.  
4. Secure the Heading Sensor mounting bracket (4) to the bulkhead  
using the four self-tapping screws (3) provided. The embossed  
arrow on the back of the bracket must be pointing skywards.  
Note: The Heading Sensor must be within 10° of the vertical and,  
ideally, positioned at the pitch and roll centre of the vessel.  
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Chapter 3: Installation  
5. Assemble the Heading Sensor (1) to the Heading Sensor mounting  
bracket (4). The shaft protruding from the base of the unit must click  
positively into the slot in the base of the mounting bracket.  
Note: The boat symbol embossed on the top of the active compass  
should be facing forwards.  
2
1
3
4
1 Heading Sensor  
2 Allen bolt  
3 Self-tapping screw  
4 Heading Sensor mounting bracket  
D5506-1  
6. Pass the Allen bolt (2) through the aperture in the top of the  
Heading Sensor mounting bracket (4) and tighten using the Allen  
keysupplied.  
Note: You may need to loosen this later to adjust the Heading Sensor  
alignment , as described in Chapter 4, Calibration.  
3.4 Connection Procedure  
To connect your Heading Sensor to an NMEA 0183 compatible  
instrument, such as a XX Radar:  
1. Plug the 6ft (2m) Heading Sensor cable (supplied) into the  
HeadingSensor.  
2. Connect the black and red wires from the cable to the  
corresponding wires from the NMEA 0183 compatible  
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HeadingSensorOwnersHandbook  
equipment, using a suitable connector block, as shown in the  
diagram below. A 16.25ft (5m) NMEA accessory cable is  
available for more distant connection if required.  
Red  
NMEA power  
Yellow  
+ NMEA data  
Black  
-- NMEA data  
Ground  
D5508-1  
Check the handbook supplied with NMEA 0183 compatible  
equipment, to determine the correct pin connections for the heading  
sensor input. For example, the connections for a XX Radar are shown  
inthefollowingdiagram.  
1
5
XX Radar  
J404 NMEA Chassis Connector  
viewed from the solder side of the  
G263129-17k connector  
6
3
2
4
Heading Sensor  
(1) NMEA + (Navigation aid)  
(2) NMEA - (Navigation aid)  
(5) 12VDC (Heading sensor)  
(3) NMEA + (Heading sensor)  
(4) NMEA - (Heading sensor)  
Red  
Yellow  
Black  
(6) Ground (Heading sensor)  
D5507-1  
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11  
Chapter 4: Calibration  
Chapter 4:Calibration  
4.1 Introduction  
The Raymarine Heading Sensor must be calibrated to ensure that the  
transmitted compass heading information is accurate. This procedure  
should be carried out before the unit is used as a navigational aid.  
The calibration consists of two components:  
• Compass Linearisation: This detects heading errors caused by iron  
objects, such as engines or gas bottles. Once such errors have been  
detected, the Heading Sensor corrects them automatically.  
• Heading Alignment: This is required to match the displayed  
heading to a known heading or transit. You can align the Heading  
Sensor with your ships compass, providing your ships compass is  
accurate.  
The compass linearisation is performed using the Raymarine Heading  
Sensors Continuous Deviation Correction. The Heading Sensor  
monitors the deviation continuously and, if the required conditions are  
met, updates its correction data.  
This chapter describes the Continuous Deviation Correction procedure  
and the heading alignment procedure.  
EMC Conformance  
Always check the installation before going to sea to make sure that it  
is not affected by radio transmissions, engine starting etc.  
4.2 Continuous Deviation Correction  
TheRaymarineHeadingSensornormallymonitorsmagneticdeviation  
continuously. Everytimeyourvesselcompletesa360°turnwithinthe  
time constraints of the system, the compass checks the new deviation  
data and updates its correction data if required.  
Deviation data is only used if the vessel has completed a 360°turn in  
not less than three minutes, without any sudden increases in speed, and  
if this provides more accurate data than that already stored.  
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HeadingSensorOwnersHandbook  
To ensure that the compass has received accurate data, perform the  
followingprocedure:  
1. Choose a calm day, and select an area of open water. Ideally, the  
current and tide effects should be at a minimum.  
2. Calculate the size of circle you need to make in order to keep your  
turn rate down to not less than 45 seconds for each 90°of turn.  
You can turn more slowly than this, and you do not need to keep to  
an exact circle, but if you turn too quickly the deviation data will be  
ignored.  
3. Turn your vessel continuously through two full circles (720°), at a  
slow, steady speed, keeping the vessel level. You can go either  
clockwiseoranti-clockwise.  
4. Ideally, continue to turn through a further two full circles to ensure  
you have obtained accurate data.  
The Heading Sensor will now correct all heading readings using the  
variation data obtained.  
4.3 Heading Alignment  
After you have performed the Continuous Deviation Correction  
procedure, you should check the heading alignment. You can do so  
using one or both of the following techniques:  
Comparetheheadinginformationonyourdisplayinstrument(such  
as a XX Radar or RayData) with the ships magnetic compass for  
severalheadings.  
Note: Your magnetic compass must be accurate, and should have  
been calibrated recently.  
Choose reference points from a chart, and navigate between them.  
Then compare the readings from your Heading Sensor with the  
actual chart courses.  
If the Heading Sensors readings differ from the actual readings by a  
constant amount, you need to correct the heading alignment. This is  
achieved by adjusting the position of the compass, as follows:  
1. Loosen the Heading Sensor mounting slightly, so that you can  
rotate the sensor. To do this, use the Allen key supplied with the  
Heading Sensor to loosen the Allen bolt in the top of the Heading  
Sensor mounting bracket (see page 7).  
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13  
Chapter 4: Calibration  
2. If the Heading Sensors readings are less than the actual readings,  
rotatethesensorslightlyclockwise.  
If the Heading Sensors readings are greater than the actual  
readings, rotatethesensorslightlyanti-clockwise.  
3. Check the headings again, and repeat step 2 if required.  
4. When the headings match, tighten the Allen bolt to hold the sensor  
in its new position.  
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HeadingSensorOwnersHandbook  
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15  
Specification  
Heading Sensor Specification  
Dimensions:  
90mm x 100mm x 130mm (3.5in x 3.9 in x 5.1in)  
Power Supply:  
Power Consumption:  
Operating Temperature:  
Weight:  
10 to 16V DC  
40mA  
-10°C to +70°C (14°F to 158°F)  
450g (1 lb)  
Compatability:  
Accuracy:  
NMEA 0183 compatible equipment  
+/- 0.5°  
Gimbal Range:  
Pitch = +33°, Roll + 45°  
Data Output (NMEA):  
(10Hz)  
HDM (Magnetic Compass Heading)  
HDG(Headingonly)  
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Heading Sensor Installation Manual  
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84064_8.fm Page 1 Monday, April 9, 2001 4:42 PM  
Limited Warranty Certificate  
Raymarine warrants each new Light Marine/Dealer Distributor Product to be of good materials and  
workmanship, and will repair or exchange any parts proven to be defective in material and  
workmanshipundernormalusefor aperiodof 2years/24monthsfromdateof saletoenduser, except  
as provided below.  
Defects will be corrected by Raymarine or an authorized Raymarine dealer. Raymarine will, except  
asprovidedbelow,acceptlaborcostforaperiodof2years/24monthsfromthedateofsaletoenduser.  
During this period, except for certain products, travel costs (auto mileage and tolls) up to 100 round  
trip highway miles (160 kilometres) and travel time of 2 hours, will be assumed by Raymarine only  
on products where proof of installation or commission by authorized service agents, can be shown.  
Warranty Limitations  
RaymarineWarrantypolicydoesnotapplytoequipmentwhichhasbeensubjectedtoaccident, abuse  
or misuse, shipping damage, alterations, corrosion, incorrect and/or non-authorized service, or  
equipment on which the serial number has been altered, mutilated or removed.  
Except where Raymarine or its authorized dealer has performed the installation, it assumes no  
responsibility for damage incurred during installation.  
This Warranty does not cover routine system checkouts or alignment/calibration, unless required by  
replacement of part(s) in the area being aligned.  
A suitable proof of purchase, showing date, place, and serial number must be made available to  
Raymarine or authorized service agent at the time of request for Warranty service.  
Consumable items, (suchas: Chart paper, lamps, fuses, batteries, styli, stylus/drive belts, radar mixer  
crystals/diodes, snap-in impeller carriers, impellers, impeller bearings, and impeller shaft) are  
specifically excluded from this Warranty.  
Magnetrons, Cathode Ray Tubes (CRT), TFT Liquid Crystal Displays (LCD) and cold cathode  
fluorescentlamps(CCFL),hailerhornsandtransducersarewarrantedfor1year/12monthsfromdate  
of sale. These items must be returned to a Raymarine facility.  
All costs associated with transducer replacement, other than the cost of the transducer itself, are  
specifically excluded from this Warranty.  
Overtime premium labor portion of services outside of normal working hours is not covered by this  
Warranty.  
Travel cost allowance on certain products with a suggested retail price below $2500.00 is not  
authorized. When/or if repairs are necessary, these products must be forwarded to a Raymarine  
facility or an authorized dealer at owner’s expense willbe returned via surface carrier at no cost to the  
owner.  
Travel costs other than auto mileage, tolls and two (2) hours travel time, are specifically excluded on  
all products. Travel costs which are excluded from the coverage of this Warranty include but are not  
limited to: taxi, launch fees, aircraft rental, subsistence, customs, shipping and communication  
charges etc. Travel costs, mileage and time, in excess to that allowed must have prior approval in  
writing.  
TO THE EXTENT CONSISTENT WITH STATE AND FEDERAL LAW:  
(1) THIS WARRANTY IS STRICTLY LIMITED TO THE TERMS INDICATED HEREIN, AND  
NO OTHER WARRANTIES OR REMEDIES SHALL BE BINDING ON RAYMARINE  
INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABLE OR  
FITNESS FOR A PARTICULAR PURPOSE.  
(2) Raymarine shall not be liable for any incidental, consequential or special (including punitive or  
multiple) damages.  
All Raymarine products sold or provided hereunder are merely aids to navigation. It is the  
responsibility of the user to exercise discretion and proper navigational skill independent of any  
Raymarine equipment.  
Document number: 84064-8  
April 2001  
 
84064_8.fm Page 2 Monday, April 9, 2001 4:42 PM  
Factory Service Centers  
United States of America  
UK, Europe, Middle East, Far East  
Raymarine Inc  
22 Cotton Road, Unit D  
Nashua, NH 03063-4219, USA  
Raymarine Ltd  
Anchorage Park, Portsmouth  
PO3 5TD, England  
Telephone: +1 603 881 5200  
Fax: +1 603 864 4756  
www.raymarine.com  
Telephone: +44 (0)23 9269 3611  
Fax: +44 (0)23 9269 4642  
Sales & Order Services  
Telephone: +1 800 539 5539 Ext. 2333 or  
+1 603 881 5200 Ext. 2333  
Customer Support  
Telephone: +44 (0)23 9271 4713  
Fax: +44 (0)23 9266 1228  
Technical Support  
Telephone: +1 800 539 5539 Ext. 2444 or  
+1 603 881 5200 Ext. 2444  
Product Repair Center  
Telephone: +1 800 539 5539 Ext. 2118  
Stick barcode label here  
Purchased from  
Dealer address  
Purchase date  
Installed by  
Installation date  
Commissioned by  
Commissioning date  
Owner’s name  
Mailing address  
This portion should be completed and retained by the owner.  
 

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