Simrad GC80 Compact Gyro User manual

INSTRUCTION MANUAL
SIMRAD GC80/85
COMPACT
Gyro Compass
20221511D English

Simrad GC80/GC85 Compact Gyro Compass
ii 20221511 / D
Document revisions
Rev Date Written by Checked by Approved by
A 19.12.03
B 17.02.05
C 05.12.05
D 09.05.07
Document history
Rev. A First issue.
Rev. B Updated for new software release (Master compass: V.1.03, Control
unit: V.1.04).
Rev. C New procedure for how to adjust true heading, updated dimensions for
remote panel, other minor updates to text throughout the manual.
Rev.D Text and illustration updates.

INSTRUCTION MANUAL
20221511 / D iii
About this manual
This manual is intended as a reference guide for installing, operating and maintaining
Simrad GC80 and GC85 Compact Gyro compasses.
The manual assumes that the operator is a qualified ship officer, or is under supervision
of a qualified person.
In this manual, references to buttons on the operator panels are written in boldface, but
in a different text style (e.g. SET button, DISP button, GYRO button).
Important text that requires special attention from the reader is emphasized as follows:
Note! Used to draw the reader’s attention to a comment or some
important information.
Caution Used for warning the reader that a risk of damage to the
equipment exists if care is not exercised.
WARNING Used when it is necessary to warn personnel
that a risk of injury or death exists if care is
not exercised.

Simrad GC80/GC85 Compact Gyro Compass
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This manual is divided in the following sections:
1. System overview
An overview of the GC80/GC85 Compact gyro system and it’s components.
2. User interface
Overview of GC80 Compact Control unit and the user interface.
3. Operation
Main operating procedures for using the GC80/GC85 Compact Gyro compass.
4. Maintenance
Simple maintenance procedures that should be performed by the system operator,
together with a complete procedure for how to replace the sensitive element and fuses.
5. Installation
Mechanical installation, cable connection, and software configuration for the
GC80/GC85 Compact gyro system.
6. Advanced settings
A description of parameters that can be entered or changed in the Extension menu.
7. Technical specifications
Specifications for the system and for all separate units in the GC80/GC85 Compact gyro
system.
8. Drawings
Outline drawings and wiring diagrams for the GC80/GC85 Compact gyro system.
9. Spare part list
List of all standard and optional units that are used in the GC80 and GC85 Compact
gyro systems.
10. Terminal layout
List of all terminal pins and terminal labelling with details on pcb’s in the GC80 Control
unit.
11. Dip switch settings
Drawings and references of jumpers and dip switches for the different printed circuits
boards in the Control unit.
12. Alarm messages and corrective actions
A description of how system errors are indicated, and corrective actions that can be
performed by the operator.

INSTRUCTION MANUAL
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Contents
1SYSTEM OVERVIEW...........................................................1
1.1 Introduction.......................................................................2
1.2 Precaution in use................................................................3
1.3 System components............................................................4
1.4 Bearing repeaters...............................................................4
2USER INTERFACE ..............................................................5
2.1 GC80 Compact Control unit..................................................6
3OPERATION.......................................................................9
3.1 System Start-up and Shut-down.........................................10
Start-Up ....................................................................10
Turning the Gyro compass OFF......................................11
3.2 Selecting active compass...................................................12
3.3 Adjusting dimming level ....................................................12
3.4 Displaying present settings ................................................13
Displaying settings with no external sensor connected......13
Displaying settings with external sensor connected ..........14
3.5 Confirming present settings ...............................................16
True bearing...............................................................16
Latitude.....................................................................16
Speed........................................................................17
3.6 Pendulum function............................................................19
3.7 Alarm messages...............................................................20
Acknowledging an alarm ..............................................21
4MAINTENANCE................................................................23
4.1 General...........................................................................24
4.2 Precautions......................................................................24
4.3 Cleaning the operator panels and the cabinet surface ............24
4.4 Checking the connectors....................................................24
4.5 Checking mechanical installation.........................................24
4.6 Preventive maintenance intervals........................................25
4.7 Replacing the Sensitive element .........................................25
Mechanical installation .................................................25

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Verifying the element’s tilt angle ...................................29
Parameter updates......................................................30
Balancing the Horizontal ring ........................................31
4.8 Replacing the Fuses ..........................................................32
Master Compass..........................................................32
Compact Control unit...................................................32
Power Supply Unit (Option) ..........................................34
5INSTALLATION................................................................35
5.1 Unpacking and handling ....................................................36
5.2 Mechanical installation ......................................................36
Control unit................................................................37
Power supply unit (Option) ...........................................39
Master compass..........................................................40
5.3 Cabling ...........................................................................41
5.4 Grounding the units ..........................................................42
5.5 Dip-switch and jumper settings ..........................................42
Activating the control unit for GC80 or GC85 system ........43
Activating an external heading sensor ............................44
Activating the pendulum function ..................................44
5.6 Installing the Sensitive element..........................................45
Verifying the element’s tilt angle ...................................47
5.7 System start-up and software configuration .........................49
System Start-up .........................................................49
Configuring the gyro system.........................................50
Setting the Latitude input source...................................52
Setting the Speed input source .....................................53
5.8 Balancing the Horizontal ring..............................................54
Adjusting True heading ................................................54
6ADVANCED SETTINGS .....................................................57
6.1 General...........................................................................58
6.2 Using the Extension menu .................................................58
6.3 The Extension menu overview ............................................59
7TECHNICAL SPECIFICATION ...........................................65
7.1 Accuracy .........................................................................66
7.2 General specification.........................................................66

INSTRUCTION MANUAL
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7.3 Input specification ............................................................67
7.4 Output specification ..........................................................68
7.5 Physical Dimensions..........................................................69
GC80 Master Compass.................................................69
GC80 Compact Control Unit ..........................................69
GC80 Power Supply unit (option)...................................69
7.6 Power .............................................................................69
GC80/85 Master Compass ............................................69
GC80 Compact Control Unit ..........................................70
GC80 Power Supply unit (option)...................................70
7.7 Environmental Specification ...............................................70
GC80/85 Master Compass ............................................70
GC80 Compact Control unit ..........................................70
8DRAWINGS .....................................................................71
8.1 Drawings included ............................................................72
9SPARE PART LIST............................................................79
9.1 GC80 Compact Gyro system...............................................80
9.2 GC85 Compact Gyro system...............................................80
9.3 GC80/GC85 Optional equipment .........................................81
10 TERMINAL LAYOUT .........................................................83
10.1 ITERM board....................................................................84
TB1...........................................................................84
TB2...........................................................................85
TB3...........................................................................86
10.2 IOPT board......................................................................87
TB3...........................................................................87
TB4...........................................................................87
11 DIP SWITCH SETTINGS...................................................89
11.1 Compact control unit.........................................................90
ICIF board..................................................................91
IOPT board.................................................................94
ITERM board...............................................................96
12 ALARM MESSAGES AND CORRECTIVE ACTIONS...............97
12.1 The alarm system.............................................................98

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12.2 Acknowledging an alarm....................................................99
12.3 Fault finding .................................................................. 100
Main power failure..................................................... 100
Internal power failure in Control unit............................ 101
Inverter failure ......................................................... 101
Zero cross failure ...................................................... 101
System communication failure .................................... 102
GPS communication or data failure .............................. 102
Internal communication failure.................................... 103
External bearing sensor failure.................................... 103
LOG (serial) communication or data failure ................... 103
Repeater failure ........................................................ 104
Failure when powering ON the gyro compass ................ 104
12.4 Complete alarm code list ................................................. 105

SYSTEM OVERVIEW
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1SYSTEM OVERVIEW
This section provides an overview of GC80 and GC85
Compact Gyro compasses and their components.

Simrad GC80/GC85 Compact Gyro Compass
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1.1 Introduction
GC80 and GC85 Compact Gyro compasses have been
designated for any size of vessels to enhance the navigation
capabilities and reliability. The gyro compasses eliminate the
inconvenience and limitations of magnetic compasses, and
provide a variety of electrical outputs to supply accurate and
consistent heading information to other navigational equipment.
-A GC80 Compact gyro is designed for vessels with speed
up to 30 knots. The system complies with IMO A.424 (11)
and Wheel Mark Specifications.
-A GC85 Compact gyro system is suitable for high speed
vessels with speed up to 70 knots. It complies with IMO
A.821 (19) HSC.
GC80 and GC85 Compact gyro systems have different sensitive
elements, but use the same GC80 Compact Control unit. The
systems are identified with divergent dip switch settings in
Master compass and in the Control unit.
Note! A GC80 or GC85 system is identified by the labelling on top of
the Master compass’ case as shown on the figure below.
The labelling on the control unit is identical for both gyro
systems.
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