Simrad GC80 EXPANDED User manual

INSTRUCTION MANUAL
SIMRAD GC80/85
EXPANDED
Gyro Compass
20221529C English

Simrad GC80/GC85 Expanded Gyro Compass
ii 20221529 / C
Document revisions
Rev Date Written by Checked by Approved by
A 08.01.04
B 17.02.05
C 05.12.05
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.

INSTRUCTION MANUAL
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About this manual
This manual is intended as a reference guide for installing, operating and maintaining
Simrad GC80 and GC85 Expanded 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.

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This manual is divided in the following sections:
1. System overview
An overview of the GC80/GC85 Expanded gyro system and it’s components.
2. User interface
Overview of GC80 Expanded Control unit and the user interface.
3. Operation
Main operating procedures for using the GC80/GC85 Expanded 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 Expanded 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 Expanded gyro
system.
8. Drawings
Outline drawings and wiring diagrams for the GC80/GC85 Expanded gyro system.
9. Spare part list
List of all standard and optional units that are used in the GC80 and GC85 Expanded
gyro systems.
10. Terminal layout
List of all terminal pins and terminal labelling with details on GTERM board 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 Expanded 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
3.5 Confirming present settings ............................................... 15
True bearing............................................................... 15
Latitude ..................................................................... 15
Speed........................................................................ 16
3.6 Pendulum function ............................................................ 18
3.7 Alarm messages ............................................................... 19
Acknowledging an alarm .............................................. 20
4MAINTENANCE ................................................................21
4.1 General........................................................................... 22
4.2 Precautions...................................................................... 22
4.3 Cleaning the operator panels and the cabinet surface ............ 22
4.4 Checking the connectors.................................................... 22
4.5 Checking mechanical installation......................................... 22
4.6 Preventive maintenance intervals........................................ 23
4.7 Replacing the Sensitive element ......................................... 23
Mechanical installation ................................................. 23
Verifying the element’s tilt angle ................................... 27
Parameter updates ...................................................... 28

Simrad GC80/GC85 Expanded Gyro Compass
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Balancing the Horizontal ring ........................................ 29
4.8 Replacing the Fuses .......................................................... 30
Master Compass.......................................................... 30
Expanded Control unit.................................................. 31
5INSTALLATION................................................................33
5.1 Unpacking and handling .................................................... 34
5.2 Mechanical installation ...................................................... 34
Control unit ................................................................ 35
Master compass .......................................................... 37
5.3 Cabling ........................................................................... 38
Power supply .............................................................. 39
5.4 Grounding the units .......................................................... 40
5.5 Dip-switch settings ........................................................... 40
Configuring the Control unit.......................................... 41
External heading sensor ............................................... 42
Pendulum function....................................................... 43
5.6 Installing the Sensitive element .......................................... 44
Verifying the element’s tilt angle ................................... 46
5.7 System start-up and software configuration ......................... 48
System Start-up ......................................................... 48
Configuring the gyro system ......................................... 49
Setting the Latitude input system .................................. 51
Setting the Speed input system..................................... 52
5.8 Balancing the Horizontal ring.............................................. 53
Adjusting True heading ................................................ 53
6ADVANCED SETTINGS .....................................................55
6.1 General........................................................................... 56
6.2 Using the Extension menu ................................................. 56
6.3 The Extension menu overview ............................................ 57
7TECHNICAL SPECIFICATION ...........................................63
7.1 Accuracy ......................................................................... 64
7.2 General specification ......................................................... 64
7.3 Input specification ............................................................ 65
7.4 Output specification .......................................................... 66
7.5 Physical Dimensions.......................................................... 67

INSTRUCTION MANUAL
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GC80/GC85 Master Compass ........................................ 67
GC80 Expanded Control Unit......................................... 67
7.6 Power ............................................................................. 68
GC80/GC85 Master Compass ........................................ 68
GC80 Expanded Control Unit......................................... 68
7.7 Environmental Specification ............................................... 68
GC80/GC85 Master Compass ........................................ 68
GC80 Expanded Control unit ......................................... 68
8DRAWINGS .....................................................................69
8.1 Drawings included ............................................................ 70
9SPARE PART LIST............................................................77
9.1 GC80 Expanded Gyro system ............................................. 78
9.2 GC85 Expanded Gyro system ............................................. 78
9.3 Optional equipment, GC80/85 Expanded system ................... 79
10 TERMINAL LAYOUT .........................................................81
10.1 GTERM board ................................................................... 82
TB1 ........................................................................... 82
TB2 ........................................................................... 84
11 DIP SWITCH SETTINGS ...................................................87
11.1 Expanded control unit ....................................................... 88
GPOWER board ........................................................... 89
GTERM board.............................................................. 90
SCC board.................................................................. 91
SIFC board ................................................................. 95
12 ALARM MESSAGES AND CORRECTIVE ACTIONS.............101
12.1 The alarm system........................................................... 102
12.2 Acknowledging an alarm.................................................. 103
12.3 Fault finding .................................................................. 104
Main power failure..................................................... 104
Internal power failure in Control unit............................ 105
Inverter failure ......................................................... 105
Zero cross failure ...................................................... 105
System communication failure .................................... 106
GPS communication or data failure .............................. 106

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Internal communication failure .................................... 107
External bearing sensor failure .................................... 107
LOG (serial) communication or data failure ................... 107
Repeater failure ........................................................ 108
Failure when powering ON the gyro compass ................ 108
12.4 Complete alarm code list ................................................. 109

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

Simrad GC80/GC85 Expanded Gyro Compass
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1.1 Introduction
GC80 and GC85 Expanded 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 Expanded 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 Expanded 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 Expanded gyro systems have different
sensitive elements, but use the same GC80 Expanded 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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