Mb20mk3 Ingl Rev1

USER AND INSTALLATION MANUAL


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REVISION INDEX

REV. DESCRIPTION MODIFICATION SHEET

REFERENCE

CONTROLLED BY

DATE APPROVATED BY

DATE

0 ORIGINAL -- 17/02/03

1 REVISION: modify paragraphs 1.3, 1.5, 1.6.1.2, 1.6.1.3, 2.3.1, 2.3.3, 2.3.5, 3.3.2 and 3.4.1

-- 06/05/03


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GENERAL INDEX

1 GENERAL INFORMATION .........................................................................................................................1-1 1.1 HANDBOOK APPLICABILITY .........................................................................................................................1-1 1.2 PURPOSE OF THE EQUIPEMENT ....................................................................................................................1-1 1.3 APPLICABLE DOCUMENTS ...........................................................................................................................1-2 1.4 LIST OF UNITS..............................................................................................................................................1-2 1.5 TECHNICAL DATA........................................................................................................................................1-3 1.6 GENERAL DESCRIPTION ..............................................................................................................................1-5

1.6.1 Gyrocompass system ..........................................................................................................................1-5

2 USE....................................................................................................................................................................2-1 2.1 CONTROLS AND INDICATORS .......................................................................................................................2-1 2.2 ACOUSTIC AND VISUAL ALARMS ................................................................................................................2-1 2.3 PROCEDURE FOR USE ..................................................................................................................................2-1

2.3.1 TABLE 1 POWER ON .......................................................................................................................2-2 2.3.2 TABLE 2 PRELIMINARY SETTINGS ( during installation)............................................................2-3 2.3.3 TABLE 3 REPHASING OF THE SYNCHRO USERS (analogical repeaters on the 360X channel) ..2-4 2.3.4 TABLE 4 DIRECT STARTING..........................................................................................................2-4 2.3.5 TABLE 5 STARTING WITH PRE-ORIENTATION ...........................................................................2-5 2.3.6 TABLE 6 PROGRAMMED STARTING..............................................................................................2-5 2.3.7 TABLE 7 FUNCTIONS PERFORMED ON OPERATIVE GYROCOMPASS (gyroscope in

rotation)..............................................................................................................................................2-6 2.3.8 TABLE 8 FAIL CODE.......................................................................................................................2-7

2.4 SERVICE OPERATION ...................................................................................................................................2-7

3 INSTALLATION .............................................................................................................................................3-1 3.1 TRANSPORTATION AND UNPACKING...............................................................................................3-1 3.2 MECHANICAL INSTALLATION.......................................................................................................................3-1

3.2.1 Master Compass.................................................................................................................................3-1 3.2.2 Interface and power supply unit.........................................................................................................3-1 3.2.3 Control unit ........................................................................................................................................3-2

3.3 CONNECTION...............................................................................................................................................3-2 3.3.1 General...............................................................................................................................................3-2 3.3.2 Connections........................................................................................................................................3-3

3.4 ADJUSTMENTS ............................................................................................................................................3-4 3.4.1 Master Compass alignment ................................................................................................................3-4


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FIGURES INDEX

Fig. 1-1 System outline ...................................................................................................................................... 1-8 Fig. 1-2 Master Compass .................................................................................................................................... 1-9 Fig. 1-3 Master Compass (inside view)............................................................................................................ 1-10 Fig. 1-4 Interface and power supply unit............................................................................................................ 1-11 Fig. 1-5 Control unit......................................................................................................................................... 1-12 Fig. 2-1 Presentation window............................................................................................................................. 2-9 Fig. 2-2 Operative window............................................................................................................................... 2-10 Fig. 2-3 SERVICE window .......................................................................................................................... 2-11 Fig. 2-4 General Setup window .................................................................................................................... 2-12 Fig. 2-5 Setup screen window....................................................................................................................... 2-13 Fig. 2-6 Rephase window ............................................................................................................................. 2-14 Fig. 2-7 Preset window................................................................................................................................. 2-15 Fig. 2-8 Timer window ................................................................................................................................. 2-16 Fig. 2-9 Bow angle indication on extended scale ............................................................................................. 2-17 Fig. 2-10 Status window ............................................................................................................................... 2-18 Fig. 2-11 Confirm window............................................................................................................................ 2-19 Fig. 3-1 Master compass packing....................................................................................................................... 3-5 Fig. 3-2 Master Compass installation drawing ................................................................................................... 3-6 Fig. 3-3 Interface and power supply unit installation drawing ........................................................................... 3-7 Fig. 3-4 Control unit installation drawing .......................................................................................................... 3-8 Fig. 3-5 Interface and power supply layout ........................................................................................................ 3-9


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1 GENERAL INFORMATION

1.1 HANDBOOK APPLICABILITY

This handbook provides information, data, procedures about operation, installation and use of the gyrocompass equipment MK3.

Chapter 1 contains general information on the equipment, the list of units, technical data and a physical description of the individual units.

Chapter 2 gives an overall functional description of the system and a detailed description of the units.

Charter 3 contains the installation procedures, the alignment and adjustment procedures and interfacing with other equipment not present in the system.

1.2 PURPOSE OF THE EQUIPEMENT

The purpose of the MK3 gyrocompass is to continuously provide the ships bow angle (heading) with respect to the geographic North. Such angle information can be read directly on the Master Compass card and the digital display of the Control Unit. The Control Unit makes also available the heading data to the DC synchro users(analogic repeaters), the 6 steps/deg electronic users, and the serial digital users, such as autopilots and course printer, radar, RDF, etc.


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1.3 APPLICABLE DOCUMENTS

The equipment has been designed in compliance with the following:

I.M.O. resolution A.424 (XI) 'Performance standards for Gyrocompasses' I.M.O. resolution A.574 (XIV) 'General requirements for electronic navigational aids' I.E.C. 60945 'Marine navigational equipment' 'General requirements - Methods of testing and required test results I.S.O. Standard 8728 'Shipbuilding - Marine Gyrocompasses' IEC 61162 1-2 'Maritime navigation and radiocommunication equipment

and systems Digital interfaces' MED 96/98/EC Marine Equipment Directive

1.4 LIST OF UNITS

Basic Equipment

The system is composed of three units:

SIZE [mm] WEIGHT [kg] H W D

- Master Compass MB20 450 338 340 40 - Interface and IU45-10 400 300 204 15

power supply unit - Control unit DCU110 192 192 110 2

Main Accessories

SIZE [mm] WEIGHT [kg] H W D

MR33 Steering Repeater 192 192 145 3.3 MR34 Bearing Repeater 208 208 195 5.5 MV80 Junction Box with Dimmer 270 124 71 1.7 (Required for MR34) PSU18000 AC/DC Converter 350 300 208 4 MR128 Course Printer 105 380 375 4.5


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1.5 TECHNICAL DATA

a) Power supply Two options are available:

1) DC mains - 24 VDC. 2) AC and DC mains, with internal automatic change-over (according to GMDSS rules)

through PSU18000 converter.

A 24VDC alarm line must also be connected

Power requirements:

DC supply: 220W (basic), 250W (2 repeaters).

b) Accuracies Settle point error : 0.75 x sec Lat. Settle heading variation (RMS) : 0.25 x sec Lat. Dynamic error : 1 x sec Lat.

c) General data Worst case settling up time (without pre orienting) : 4 hr. Fast settling up time : 1 hr. (pre-orienting the compass within 10 from actual heading provides an accuracy of 1 after1hour from gyroscope start). Max roll angle : 45. Max pitch angle : 45. Follow-up system speed : > 60/s.

Automatic heading data correction: Latitude range: da -70 a +70. Speed range : 0 - 70 Kts.

d)Heading signal outputs

Synchro output

The synchro output is intended for 18TRX6 synchro repeaters (max 2 ): the reference is a +24Vdc; the phases (line to line) can vary between 0V and 24 Vdc.

Stepper output

The 6 step/deg interface has a 35VDC positive reference, a 600mA driving capability each phase.


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Serial output Eleven independent serial lines are available: three of them trasmit heading data once per second at 4800Bps being full IEC61162-1 compliant, while the others transmit heading data every 50 milliseconds at 38400Bps (full IEC61162-2 compliant). In addition, these fast serial ports can be user configured for transmission at a baud rate of 4800 Bps. All the serial outputs transmit the True Heading sentence $HDT.

e) alarms Two visual indications are available:

System fail (also acoustic); Power fail.

For both alarms a voltage free contact is available for external alarm repetition: 28Vdc 1A max.

f) Environmental cheracteristics Master Compass Control Unit Operating temperature : 0 C 45 C -10 C 55 C Storage temperature : -25C +70C -25 C 70 C


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1.6 GENERAL DESCRIPTION

1.6.1 Gyrocompass system

The MB20MK3 gyrocompass equipment is composed of three units: - Master Compass MB20. - Power supply and interface unit IU45-10. - Control Unit DCU 110.

The Master Compass include the gyroscopic system and costitute the bearing sensor.

The power supply and interface unit provides the following functions: - Power supply of the Master Compass. - Interface between external user and control unit.

The Control Unit is microprocessor based provides the following functions: Interface the user through touch screen display. Correction of the bow data in latitude and speed. Display the bow data. diagnostics system.

1.6.1.1 Master Compass

The pur pose of the Master compass is to indicate the ships heading. Such information is provided both visually, by compass card readout, and electrically. The Master Compass is contained in a rectangular shaped binnacle with four slot holes in its base, to anchor the unit to the ships floor. The Compass functional groups are enclosed in a watertight container which is suspended inside the binnacle via elastic links. The binnacle cover has a glass window which allows compass card reading. On the external housing is located the sealed connector for the electrical connection between the Master Compass and interface/power supply unit. Through the cable, the Master Compass resceive the power supply and transmit the bow angle signal. The Master Compass is composed of the following parts(Fig. 1-3):

a- Binnacle (Ref. 1) Aluminium structure used to hold and anchor to round the compass case.

Four spring suspensions are fixed to its four side edges by which the compass container with its cover are borne. Suspension damping is provided by steel thread elements. In the binnacle base, four slot holes are available to fix the Master Compass to the floor. On the binnacle base there is a refernce mark to help correct alignment of the compass to the ships hull.

b- Container with cover (Ref. 2) It is a watertight housing which contains the Master Compass functional assemblies, completely submerged in inert silicon oil. In the lower part of the container a rubber membrane is fitted to compensate for liquid dilatation. On the side wall is placed a tight jack for electric connection.


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The cover is fitted with a glass to allow reading of the compass card and with a threaded cap to allow drainage of the silicon oil.

c- Supportino plate (Ref. 3) It is light alloy plate which carries the Master Compass functional assemblies. It is fixed on proper container supports and a central spout pipe which drives, by means of ball bearings, the stalk spindle that carriers the gimbals. On the plate are fitted: the follow-up servomotor with reducer; the synchro-transmitter; the brush holder; the electronic board with servoamplifier and index assembly.

d- Stalk spindle (Ref. 4) It represents the follow-up axis. It carries on its upper part the compass card (11), a gear for driving the synchro transmitter and the cylindrical slip ring for connection of power supply and signals through the follow-up axis. The lower part of the stalk spidle holds the gear that is matched with the servomotor reducer and the gimbals cap which bears the gimbals ring with gyrosphere and leveling system.

e- Gimbals ring (Ref. 5) It is fitted to the gimbals cap by means of high precision bearings. The bearings rotation axis represents the gyroscope tilt axis (elevation axis). The gimbals ring, over which the optical transduced (pick-off) is fitted, holds the gyrosphere by means of bearing, is fitted the stopper device which limits the gyrosphere relative rotation with respect to the ring around the azimuth axis. Coaxial with the upper bearing, and above it, is fitted a spiral group of conductors which feed the gyroscope motor through the azimuth axis, with smalla elastic torque and thus with minimum disturbing action for the gyroscope. For the same voltage supply purpose, through the tilt axis, highly flexible conductors provide electric connection between the gimbals ring and the gimbals cap.

f- Gyrosphere (Ref. 6) It is the heart of the gyrocompass: it contains, in low density inert gas, the gyroscope, with its motor and the gyroscope bearing lubricating system. The sphere has a sealed opening for motor voltage supply and supports the ballistic device. On its surface four weights are fixed to abate the gyroscope precessive movements and other weights for gyrosphere balancing. The pick-off reading sight is also located on the gyrosphere surface.

g- Fork (Ref. 7) It contains a properly profiled lever which limits the gimbals rings inclination when the gyroscope is stopped.

1.6.1.2 IU45-10 interface and power supply unit (Fig. 1-4)

The interface and power supply unit provides the power supply to the Master Compass and contains I/O connections with users and other navigation equipment.

Connections are available for: - Serial input from GPS. - Serial input from serial speed Log. - Serial input from magnetic compass.


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- Input from 100/200/400 pulses per minute log. - n. 11 serial outputs for digital users. - n. 2 DC synchro repeaters. - n. 3 output for stepper users.

The interface unit is composed by the following modules:

Inverter module: provides power supply to the Master Compass. It includes a main electronic board INV10000 and a transformer module CON80000.

Input/Output module: provides system I/O connections. Synchro DC, stepper and serial line signals use screw clamp connectors. It consist of the IOB10000 electronic board.

Filter module: filters the 24Vdc power supply line according to requrements of regulations regarding electromagnetic interference (EMI). It consist of the FLT500/C electronic board.

1.6.1.3 Control unit DCU-110 (Fig. 1-5)

Interface the user through touch screen display. Correction of the bow data in latitude and speed. Display the bow data. diagnostics system.

The Control Unit provides the user interface to perform all the system functions, executes calculation for speed and latitude correction of the compass angle and controls the system, including execution of diagnostic tasks.

It receives the heading data from the gyrocompass in the form of an 11,8 VAC 400 Hz resolver signal. It receives the latitude and speed data from the other equipment. It corrects the heading data from the error due to the ships latitude and speed. It sends out the corrected heading value to the users in the following formats:

DC synchro signals for GEM repeaters. 6 steps/deg (di 35 Vdc positive reference with reference to GND). NMEA 0183.

The Control Unit is composed of the following modules:

CON70000 power supply board: it provides the processor board with the appropriate voltage.

PCU10000 processor board: it is the heart of the system. It contains the microprocesor and all circuits for heading acquisition, correction and transmission of the bow data provided from the Master Compass.

LCD display with Touch Screen: displays heading data in analog (rotating compass card) and digital (numeric value) format and allows the input of all commands and parameters to the system. It is designed for panel mounting.


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MASTER COMPASSCONTROL UNITDCU-110

BUS NMEA 0183 RADAR, SATCOM, SATNAV, GPS, RDFARPA, PLOTTER, POSITIONING SYSTEMS

DIGITAL REPEATER

BUS 6 STEP/DEG

POWER SUPPLYAND INTERFACEUNIT

COURSE PRINTER

10 NMEA OUTPUT

PROCESS AND POWER SUPPLYUNIT

EXTERNALREPEATER

BRIDGE REPEATER

LINK RS 422

SYNCRO BUS

PSU18000

115/220Vac

Fig. 1-1 System outline


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Fig. 1-2 Master Compass


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Fig. 1-3 Master Compass (inside view)


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Fig. 1-4 Interface and power supply unit


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Fig. 1-5 Control unit


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2 USE

The operator shall use the controls and indicators located on the Control Unit DCU-110, on the Master Compass MB20 and on the interface and power supply unit, IU45-10.

2.1 CONTROLS AND INDICATORS On the Control Unit:

1 Touch screen display (D) shows heading data and allows input of controls and parameters.

2 red ligth indicating that 24Vdc power is on and the Control Unit is in stand-by mode.

3 green ligth indicating that the Control Unit is up and running.

Master compass 1 Lit index: it points out the compass card reading 2 Compass card: it allows bow angle readout

Interface and power supply unit 1 green ligth indicating that 24Vdc power is on.

2.2 ACOUSTIC AND VISUAL ALARMS

- An acoustic signal (triple beeep) while activating a command indicates that the command is wrong or inhibited.

- A pulsed acoustic signal indicates that an abnormal condition or a system fault has occourred. An error code is visualized on the display (see table 9 for decoding). The alarm can be quit touching the display.

2.3 PROCEDURE FOR USE

In the following table are described the procedures for:

- power on - preliminary setting out - rephasing of the synchro users (repeaters)

- Starting : - direct - with pre-orientation

- programmed - Utilizable functions with operative gyrocompass:

- the bow angle indication on enlarged scale -information on system -manual setting of the latitude and speed data.

- power off - fail code - service operations


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2.3.1 TABLE 1 POWER ON

Provide the power supply from the power distribution panel Green light of the interface and power supply unit is on. Red light is on, the display is inactive. After about 10 sec, the Presentation Window (fig. 1) is shown and the red light turns green. On the Master Compass the index is lit sequentially, for testing. Press on display. On display: the Presentation Window is replaced by the Operative Window (fig. 2) with:

- Analog presentation of the bow angle, - Digital indication of the bow angle; - Push button panel for function selection.

NOTE: On the Master Compass, the current bow angle is not indicated; if this information is needed, proceed as follows:

- Press SERVICE button - On display: the Operative Window is replaced by the SERVICE window;

(fig. 3) - Refer to the INVERTER ON information; - Press INVERTER OFF - Press one of the arrows < > briefly - In the MANUAL PRESET window, the ANGLE value shows current bow of the

Master Compass. - Press to go back to the Operative Window.


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2.3.2 TABLE 2 PRELIMINARY SETTINGS ( during installation)

These settings are needed to connect the gyrocompass system to external sensors providing Latitude and Speed data and to other users of the bow information.

On the Operative Window (fig. 2) press on SETUP On display: the Operative Window is replaced by General Setup (fig.4) by means of carry

out:

a. Language selection (Italian/English), b. Activation of the buttons acoustic signal, c. Selection of the input mode of Latitude and Speed data:

- manual; - by external sensor : GPS / serial log / pulse log .

d. Error threshold between the gyrocompass and magnetic compass indication. An alarm is activated if the current error is greater then threshold;

e. Screen adjustment; f. Date and current time setting.

Procedure:

- For points a.b.c.d.

Setting is obtained touching the selected mode; For numerical settings, touch the value shown on the screen and set, by the

numerical keyboard, the desired value; Confirm pressing on the set value; Press OK

- For display adjustment:

Press DIMM on display: the General Setup window is replaced by Setup screen (fig. 5)

Press on the adjustment type: Brightness/ Contrast; Press on +/- Press to go back on General Setup.

- For date and time setting:

Press on the shown date; Set current date by numerical keyboard; Press on set value; Press on OK Press on the shown time; Set current time by numerical keyboard; Press on the set value; Press on OK Press to go back on General Setup.


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2.3.3 TABLE 3 REPHASING OF THE SYNCHRO USERS (analogical repeaters on the 360X channel)

This procedure is carried out when the bow indication, same on all repeaters, does not agree with the bow angle shown by the Master Compass card and the Operative Window. During the rephasing procedure the heading angle of the Master Compass must not be subjected to variation.

Press on REPEAT On display: the Operative Window is replaced by the Rephase window (fig.6) with

indication of the current angle shown on the compass and on the repeaters. If the angular values shown are equal to 000,0, it is necessary to supply the synchro transmission operating as descripted in NOTE,

Verify if REPEATERS ANGLE is equal to the current value shown on the repeaters, otherwise press on value shown and set the right value by numerical keyboard.

Press on set value; Press on OK The repeaters are driven until their indication matchs the value shown on COMPASS ANGLE

(within 0,1) Press on to go back to the Operative Window. NOTE - procedure to supply the synchro transmission. - On the Operative Window press the SERVICE button;

- On display: the Operative Window is replaced by the SERVICE; (fig.3) - Refer to the INVERTER ON information - Press INVERTER OFF - Press OK - Press to go back to the Operative Window - Press REPEAT

2.3.4 TABLE 4 DIRECT STARTING

On the Operative Window (fig.2) Press on RUN

On display: - in the Operative Window, the information bar shows that the gyroscope is starting rotation up to the nominal r.p.m. value; the bow analogical indication is disabled, the bow digital indication flashes. When the gyroscope regime speed is obtained (after 10 minutes) the starting bar disappears and the bow angle indications (analogical an digital) are activated.

The gyro compass starts the orientation process that goes on about four hours.


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2.3.5 TABLE 5 STARTING WITH PRE-ORIENTATION

a. Pre-orientation procedure.

On the Operative Window (Fig. 2) Press on PRESET on display the Operative Window is replaced by PRESET window (fig. 7) with:

compass angle, pre-orientation angle and keyboard NOTE: the angles value is 000,0 (default) press on the PRESET ANGLE value the first digit number flashes and the numeration is shown on the keyboard. input ( with four digits ) the pre-orientation angle required; the buttons < > allow for

corrections, press on the set value, press on OK, COMPASS ANGLE value changes up to assume the value corresponding to the pre-

orientation angle (within 2), press , on display the pre-orientation window is replaced by Operative Window

b. Starting procedure

Operate as for DIRECT STARTING The orientation process will be now considerably faster and will approximately take one and

half hour.

NOTE: during the settling process, heading data output by the system are not suitable for navigation whether the compass is performing normal or fast settling.

2.3.6 TABLE 6 PROGRAMMED STARTING

a. Setting procedure

On the Operative Window (fig. 2) press on TIMER On display, the Operative Window is replaced by the Timer window (fig.8) showing the

DATE and HOUR at wich was scheduled the last programmed activation and the ACTIVE NO command.

Press on the DATE value The numbering appears on the keyboard Set the scheduled date (day) for starting; the maximum allowable delay between current day

and starting day is thirty-one days; the keys < > allow corrections Press on the HOUR value and set the scheduled hour of starting ( remember that the bow value

supplied by gyrocompass is usable after four hours by the starting) Press OK, data are inserted in memory.


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b. Starting procedure:

Press the ACTIVE YES button On display, the Timer window is replaced by the Operative Window on this, near the

digital indication of the bow angle, the clock symbol appears indicating that the Timer is actived.

Press the OFF button to set the system in standby mode, the display is obscured, but the red light is on. To activate the system and go back to the

Operative Window, press on the display. NOTE: to allow the programmed starting, do not remove the power supply to the system by the power distribution panel . At the time of system wake-up the 24Vdc power supply must be reliable and within 10% of the nominal value. If the system is subject to an excessive low power supply for a long time during gyroscope start-up the Inverter Module of the IU45-10 unit could be damaged.

2.3.7 TABLE 7 FUNCTIONS PERFORMED ON OPERATIVE GYROCOMPASS (gyroscope in rotation)

2.3.7.1 Indication of bow angle on expanded scale

On the Operative Window(fig. 2) press on COURSE, On display: in the Operative Window the analogical presentation of bow angle turns from the

scale 10 and resolution of 1 to the scale 2 and resolution of 0.2 (fig. 9). If the change of the bow angle is such that to exceed the expanded scale limit, the scale with lower resolution is restored automatically,

The commutation from a presentation to an other is obtained pressing on COURSE.

2.3.7.2 System information

On the Operative Window(fig. 2) press on STATUS On display: the Operative Window is replaced by the STATUS window (fig.10): with

informations on choosen selections, the Latitude and Speed data provided by external sensor and the information about complessive running hours of the system.

Press on to go back to the Operative Window.

2.3.7.3 Manual setting of Latitude and Speed data

If the signal, provided by an external sensor, is not present, proceed in the following mode:

On the Operative Window press on SETUP On display: the Operative Window is replaced by the General Setup window. (fig.4)

a. Setting of the Latitude data

If the GPS indication is present press on this label to obtain the MANUAL selection Press the LATITUDE value and set the required value through the numerical keyboard.


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Press on the set value Press OK

The bow indications will assume the new right value.

b. Setting of Speed value Follow the same procedure as for the Latitude data.

2.3.8 TABLE 8 FAIL CODE

SYSTEM FAIL 1: The rate of turn calculated by the Control Unit is greater than 20/s when the gyroscope is at nominal r.p.m..

SYSTEM FAIL 2: One of the stroke end of the gyrocompass has been activated.

SYSTEM FAIL 3: During the first hour after the gyroscope start-up the Master Compass performs, two complete rotations.

BOW IS NOT VALID 1: The reference signal for heading data acquisition is missing for more than 5 seconds.

BOW IS NOT VALID 2: Sine and Cosine signals from Master Compass are not congruent.

2.4 SERVICE OPERATION

On the Operative Window (fig.2) press SERVICE on display: the Operative Window is replaced by the Service Setup window (fig.3).

Through this window is possible:

a. Start and stop the inverter press the INVERTER ON/OFF. b. Carry out a manual pre-orientation (PRESET) controlling directly the rotation of the

enslavement:

- press one of the arrays to hold in rotation (counterclockwise CCW / clockwise CW) the enslavement up to reaching of preset angle.

NOTE: the above functions are available only when the gyroscope is not running.

c. Select the synchro signal ratio in output, - Press on the indicated ratio to change

d. Select the pulse/mile ratio for the log signal input, - Press on the indicated value to change,

e. Carry out a test (via sequential activation of lamps ) of the Master Compass index - Press the LAMP TEST button


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f. Stop the system (if the gyroscope is running the braking procedure is activated) - Press STOP - Press OK (to confirm)

To go back to the Operative Window press .


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Fig. 2-1 Presentation window


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Fig. 2-2 Operative window


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Fig. 2-3 SERVICE window


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Fig. 2-4 General Setup window


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Fig. 2-5 Setup screen window


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Fig. 2-6 Rephase window


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Fig. 2-7 Preset window


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Fig. 2-8 Timer window


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Fig. 2-9 Bow angle indication on extended scale


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Fig. 2-10 Status window


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Fig. 2-11 Confirm window


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3 INSTALLATION

3.1 TRANSPORTATION AND UNPACKING

For Master Compass transportation a suitable packing is available, that consists of a firm container, inside which is suspended by shock absorbing elements a second container which encloses the gyrocompass. Such packing, which is used for shipment from GEM should also be used when the equipment has to be sent back to GEM in case of overhauling or repairing.

During transporting the gyrocompass is strictly bound to its internal container. To avoid damage to the gyrocompass antivibration suspensions when the compass is being pulled out from its packing container, care shall be taken not to grasp it by its cover. On the contrary, the gyrocompass must be extracted from its packing container pulling it out by means of the bindings which are wrapping it up.

3.2 MECHANICAL INSTALLATION

3.2.1 Master Compass

The master compass must be mounted so as to have its base reference lubber line as parallel as possible to the ship bow axis. By the slots of the gyrocompass base a rotation of about 5 is possible to adjust its alignment. Transportation lock is not fitted on the Master Compass, therefore no preliminary operation after installation and before starting-up is necessary. The Master Compass must be mounted on the deck or over a previously positioned support, by means of bolts. If the Master compass is not used for direct reading, it can be installed in a console, preferably in a suitable drawer (in this case consistency of the drawer has to be granted when locked in its seat). Around the Master Compass, a free space must be left for airflow and 1st level maintenance.

3.2.2 Interface and power supply unit

The interface and power supply unit is provided of four drilled brackets for mounting and fixing to bulkhead. The threaded axis of fixing can be positioned like the indicated quotas in the diagram in fig.3-3. The connection of the Interface and power supply unit with the Master Compass can be realized through the special cable provided with the Interface and power supply unit. (lenght 3m e 5m). The Interface and power supply unit must to be installed in vertical position to allow a right ventilation , adequate room to unit sides must be left and enough space from the front must be foreseen to allow door opening.


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3.2.3 Control unit

The Control unit can be installed in remote position rispect to the interface and power supply, for example on the navigation console. The max lenght for this cable is 5 m. The control unit has modular dimension: 192x192mm (2x2 DIN form). In fig.3-4 are indicated the drilling holes of the console for enclosed mounting of the Control Unit.

3.3 CONNECTION

3.3.1 General

The system is provided with special cables, all the connections with the power supply network and with users can be realized with allowed cable. The power supply voltage has to be taken from a regulated line without other parallel loads, to avoid compass malfunctioning caused by high power absorption, even momentary, of other loads connected to the same power supply. The electric cables must be of sufficient length to enable connection to each installed unit. Once the cable have been laid out, they must be prepared to accept plugs or terminals by cutting away the insulating sheath to leave a correct length of free wiring needed to perform connections. The electric wiring inside the units must be of sufficient length to allow easy connection of leads to terminal boards.

NOTE

The components which require grounding must be connected to ground with a metal braid of suitable cross section. The shipyard must also supply the main breaker complete with the integral safety devices for the gyrocompass system supply. The GND stud of the Interface and power supply unit must be connected to the metal ships structure with the shortest possibile cable.


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3.3.2 Connections

The interface and power supply unit can be connected to the Control Unit with the special cable, provided with the system, connect between the interface unit and the J1 connector of the Control Unit. The cable for connecting the Master Compass is supplied already connected internally to the interface and power supply unit. This cable must be connected to the round connector J1 of the Master Compass. To perform connections to main supply and users, following table applies: (see also the interconnection diagram supplied with the equipment).

Function from to Description Note S1SYDC REP1 IOB10000 J2/1 REP1 Cable S1SYDC REP1 IOB10000 J2/2 REP1 Cable S1SYDC REP1 IOB10000 J2/3 REP1 Cable 24VDC REP1 IOB10000 J2/4 REP1 Cable

24V_REF REP1 IOB10000 J2/5 REP1 Cable S1SYDC REP2 IOB10000 J2/6 REP2 Cable S1SYDC REP2 IOB10000 J2/7 REP2 Cable S1SYDC REP2 IOB10000 J2/8 REP2 Cable 24VDC REP2 IOB10000 J2/9 REP2 Cable

24V_REF REP2 IOB10000 J2/10 REP2 Cable STP1 STEPPER1 IOB10000 J1/1 STEP1 Cable STP2 STEPPER1 IOB10000 J1/2 STEP1 Cable STP3 STEPPER1 IOB10000 J1/3 STEP1 Cable STP1 STEPPER2 IOB10000 J1/4 STEP2 Cable STP2 STEPPER2 IOB10000 J1/5 STEP2 Cable STP3 STEPPER2 IOB10000 J1/6 STEP2 Cable

C1_SOLC S_IMP IOB10000 J4/8 LOG Cable PULSE LOG

C2_SOLC S_IMP IOB10000 J5/3 REF_24Vdc Terminal engaged by a second signal

0GPS_RXH GPS IOB10000 J12/1 GPS Cable INPUT GPS_RXL GPS IOB10000 J12/2 GPS Cable INPUT

MAGN_RXH FL_GATE IOB10000 J12/5 FLUX Cable INPUT MAGN_RXL FL_GATE IOB10000 J12/6 FLUX Cable INPUT

SPARE1_RXH IOB10000 J12/3 INPUT SPARE1_RXL IOB10000 J12/4 INPUT SPARE2_RXH IOB10000 J12/7 INPUT SPARE2_RXL IOB10000 J12/8 INPUT

OUT1_H IOB10000 J15/1 OUTPUT OUT1_L IOB10000 J15/2 OUTPUT OUT2_H IOB10000 J15/3 OUTPUT OUT2_L IOB10000 J15/4 OUTPUT OUT3_H IOB10000 J15/5 OUTPUT OUT3_L IOB10000 J15/6 OUTPUT OUT4_H IOB10000 J15/7 OUTPUT OUT4_L IOB10000 J15/8 OUTPUT OUT5_H IOB10000 J14/1 OUTPUT OUT5_L IOB10000 J14/2 OUTPUT OUT6_H IOB10000 J14/3 OUTPUT OUT6_L IOB10000 J14/4 OUTPUT OUT7_H IOB10000 J14/5 OUTPUT OUT7_L IOB10000 J14/6 OUTPUT OUT8_H IOB10000 J14/7 OUTPUT


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Function from to Description Note OUT8_L IOB10000 J14/8 OUTPUT OUT9_H IOB10000 J13/1 OUTPUT OUT9_L IOB10000 J13/2 OUTPUT

OUT10_H IOB10000 J13/3 OUTPUT OUT10_L IOB10000 J13/4 OUTPUT OUT11_H IOB10000 J13/5 OUTPUT OUT11_L IOB10000 J13/6 OUTPUT

Connection of the interface and power supply unit to the 24Vdc supply is done by means of a dedicate plug hich is supplied with the equipment.

The shipyard shall provide the cables which have to be connected as follows:

D.C. supply:

J1 pin 1 +24VDC (+) J1 pin 2 +24VDCRET(-)

3.4 ADJUSTMENTS

3.4.1 Master Compass alignment

1) Define and draw, over the Master Compass support, a parallel line (within some degrees) to the ship bow axis.

2) Set and fix provsionally the Master Compass on its support taking care to place its four clamping bolts in the middle of the binnacle base slots.

3) When the checks which have to be carried out after the system installation have been executed, start up and orientate the gyrocompass, setting the Latitude parameter to the local latitude value and the Speed to 0 kts.

4) Check the gyrocompass readout with the known ship orientation and, if needed, obtain readout coincidence within the known data by correcting the binnacle position (orientation) on its support, rotating slightly the Master Compass on the four slots.

5) Tighten carefull the clamping bolts and draw on the support plane a mark in corrispondance with the binnacle base reference mark, so as to have a fixed precise reference to be used when re-installing the Master Comapss, after being removed for any reason.


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Fig. 3-1 Master compass packing

ANTISHOCK MATERIAL

BOX

WOOD SUPPORT


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elettronicaGEM

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Fig. 3-2 Master Compass installation drawing


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GEM

R

elettronica

Fig. 3-3 Interface and power supply unit installation drawing


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GEM elettronica

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Fig. 3-4 Control unit installation drawing


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Fig. 3-5 Interface and power supply layout

Mb20mk3 Ingl Rev1

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