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Heading Sensor
Owner’s
Handbook
Document number: 81124_3
Date: 1st May 2001
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Copyright © Raymarine Limited 2001 124_3cov.p65 2 09/05/01, 11:29
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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 standards for use in the leisure marine environment. The design and manufacture of Raymarine equipment and
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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 .............................................
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iv Heading Sensor Owner’s Handbook 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 ............................................ 15 124
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1 Chapter 1: 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 under the most demanding conditions. 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
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3 Chapter 2: Maintenance & Fault Finding Chapter 2: Maintenance & Fault Finding 2.1 Servicing and Safety Raymarine equipment should be serviced only by authorized Raymarine service technicians. They will ensure that service 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,
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4 Heading Sensor Owner’s Handbook 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 sy
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5 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 follo
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6 Heading Sensor Owner’s Handbook 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 any location, a
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7 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 ma
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8 Heading Sensor Owner’s Handbook 0.3L to 0.5L L X 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. Outline the four fixing holes in the Heading Sensor mounting b
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9 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. 1 2 3 4 1 Heading Sensor 3 Self-tapping screw 2 Allen bolt 4 Heading Sensor mounting bracket D5506-1 6. Pass the Allen bolt (2) through the aperture in the top of the Heading Sensor m
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10 Heading Sensor Owner’s Handbook 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 in the following diagram. XX Radar 15 6 J
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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 automat
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12 Heading Sensor Owner’s Handbook To ensure that the compass has received accurate data, perform the following procedure: 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 deviati
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13 Chapter 4: Calibration 2. If the Heading Sensor’s readings are less than the actual readings, rotate the sensor slightly clockwise. If the Heading Sensor’s readings are greater than the actual readings, rotate the sensor slightly anti-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. 124_3c04.p65 13 09/05/01, 11:30
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