Users CMZ700B Manual Gyrocompass IM80B10M-10E

IM80B10M-10E 4th Edition

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CONTENTS

Introduction

Important Cautions

1. SUMMARY 1-1 1.1 Components and Functions of Switch Unit and M .Operation Unit 1-2 1.2 Handling Precautions 1-3 1.3 Startup and Stoppage 1-4 1.4 Command Code List 1-5 1.5 Advice for Specific Situations 1-6 1.6 Definition of Terms 1-7

2. OVERVIEW 2-1

2.1 General 2-1 2.2 Performance and Specifications 2-2

3. HARDWARE 3-1

3.1 System Configuration 3-1 3.2 Component Models 3-2 3.3 Component Names and Functions 3-3

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4. OPERATION 4-1

4.1 Startup and Stoppage 4-1 4.1.1 Startup 4-1 4.1.2 Startup Indications 4-2 4.1.3 Stoppage 4-2 4.2 Functions and Operations of Switch Unit and M.Operation Unit Components 4-3 4.3 Mode Selection 4-4 4.4 Data Input Procedure 4-5 4.5 Command Functions 4-6

4.6 Display Functions 4-7 4.6.1 Displaying Compass Heading (normal mode) 4-7 4.6.2 Displaying Gyro-sphere Running Time 4-7 4.6.3 Displaying Gyro-sphere Phase Current 4-8 4.6.4 Displaying Backup Battery Voltage 4-8 4.6.5 Displaying Software Version Number 4-8 4.7 Setting Functions 4-9 4.7.1 Speed -error Correction 4-9 4.7.2 Automatic Master Compass Alignment 4-10 4.7.3 Manual Master Compass Alignment 4-11 4.7.4 Startup Timer Setting 4-12 4.8 Procedures for Operating Repeater Compass 4-13 4.8.1 Basic Operation 4-13 4.8.2 Connection Box 4-13

5. MAINTENANCE AND INSPECTION 5-1

5.1 Daily Inspection 5-1 5.2 Regular Inspection 5-1 5.3 Troubleshooting 5-2 5.3.1 Error Code List 5-2 5.3.2 How to Display the Cause of Master Compass Alarms 5-3 5.3.3 Possible Causes and Countermeasures 5-4

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6. INSTALLATION PROCEDURES 6-1

6.1 Precautions during Installation 6-1 6.1.1 Vibration Measure 6-1 6.1.2 Parallelism of Lubbers Lines 6-1 6.1.3 Service Area 6-1 6.1.4 Limitation for Using Insulation Tester 6-2 6.2 Installing and Removing the Gyro-sphere 6-2 6.2.1 Precautions during Removal 6-2 6.2.2 Installing the Gyro-sphere 6-3 6.2.3 Removing the Gyro-sphere 6-11 6.2.4 Replacement of Lamps in the Repeater Compass 6-16 6.2.5 Procedure for Aligning Repeater Compass Indication 6-17 6.2.6 Preparation of Supporting Liquid 6-18 6.3 Functions for Maintenance 6-19 6.3.1 Permission for Maintenance Function 6-19 6.3.2 Outputting Simulated DAC Signals 6-20 6.3.3 Manual drive of Master Compass (One-way turning) 6-21 6.3.4 Manual drive of Repeater Compass (One-way turning) 6-21 6.3.5 Resetting Gyro-sphere Runtime 6-22 6.3.6 Initializing Backup Memory 6-22 6.3.7 Correcting Installation Error 6-23 6.3.8 Setting Master Compass Follow-up Gain 6-24 6.3.9 Displaying Error Log 6-25 6.4 Functions for Generation 6-26 6.4.1 Permission for Generation Function 6-26 6.4.2 Setting of Follow-up Speed for the Stepper Signal 6-27 6.4.3 Setting Dip Switches 6-28 6.4.4 NMEA Output Communication Period 6-31 6.4.5 NMEA Output Header 6-31 6.4.6 Serial Input/Output Signal 6-32

. OPERATION OF THE C.OOERATION UNIT 7-1

7.1 Functions and Operations of The C.Operation Unit 7-1 7.2 Display of Normal Mode 7-2 7.3 Display That Appears When an Alarm is Generated 7-3 7.3.1 List of Error Codes 7-4 7.4 Accessing Menus 7-5 7.5 Command Functions 7-7 7.6 Display Functions 7-8 7.6.1 Displaying Heading 7-8 7.6.2 Displaying Heading Deviation 7-9 7.6.3 Displaying Rate Of Turn 7-9 7.6.4 Displaying Running Time 7-10 7.6.5 Displaying Dimmer Rank 7-10 7.6.6 Displaying Gyro-here Phase Current 7-11 7.6.7 Displaying Backup Battery Voltage 7-11 7.6.8 Displaying Deviation Voltage 7-11 7.6.9 Displaying Software Version Number 7-11

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7.7 Setting Functions 7-13 7.7.1 External Heading Input Selection 7-13 7.7.2 Setting the Ships Speed(speed-error correction) 7-14 7.7.3 Setting the Ships Position(speed-error correction) 7-14 7.7.4 Automatic Master Compass Alignment 7-15 7.7.5 Manual Master Compass Alignment 7-15 7.7.6 Displaying/Resetting Master Compass Alarm Causes 7-16 7.7.7 Displaying/Resetting C.Operation Unit Alarm Causes 7-17 7.7.8 Setting Deviation Alarm 7-17 7.7.9 Setting Start up Timer 7-18 7.8 Maintenance Functions 7-21 7.8. Permission for Maintenance Function 7-21 7.8.2 Simulated DAC Output 7-22 7.8.3 One-way Turning of the Master Compass 7-23 7.8.4 One-way Turning of the Repeater Compass 7-23 7.8.5 Resetting Gyro-sphere Running Time 7-24 7.8.6 Initialization of Backup Memory 7-24 7.8.7 Correction of the Master Compass Installation Error 7-25 7.8.8 Setting the Master Compass Follow-up Gain 7-26 7.8.9 Error Log Display 7-26 7.9 Generation Functions 7-31 7.9.1 Permission for Generation Function 7-31 7.9.2 Setting the Follow-up Speed for Stepper Signal 7-32 7.9.3 Setting Communication Protocol for Serial Output Ports 7-32 7.9.4 Setting Communication Formats for Serial Output Ports 7-33 7.9.5 Setting Communication Protocol for Serial Input Ports 7-37 7.9.6 Setting Communication Formats for Serial Input Ports 7-37

[APPENDICES] A-1

Appendix-1 Principle of Gyrocompass A-1 Appendix-2 Block Diagram A-5 Appendix-3 Components List A-17

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Introduction

This instruction manual describes the functions and handling procedures of the CMZ700 Gyrocompass. Before using the gyrocompass carefully read this manual to get a clear understanding on proper use.

Notice

The information contained in this manual is subject to change without prior notice for the reason of improvement in the performance and functions of the gyrocompass system. All efforts have been made to ensure accuracy in the preparation of this manual. However, should any errors come to your attention or any questions arise, please inform the head office of Yokogawa Denshikiki Co., Ltd. or your nearest sales representative office listed on the back cover of this manual. All rights reserved. No part of the contents of this manual may be transcribed or reproduced in any form without Yokogawa Denshikiki's written permission.

Revision Record

Feb, 2000 1st edition May, 2000 2nd edition May, 2001 3rd edition Feb, 2003 4th edition

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Important Cautions

The following safety symbols are used on the product and in this manual.

DANGER This symbol indicates that a failure to observe the given instructions may

result in a fatal hazard critical to the handling personnel.

WARNING This symbol indicates that a failure to observe the instructions may result in death

or serious injury to the personnel.

CAUTION This symbol indicates that a failure to observe the instructions may result in personal

injury or damage to the product.

DANGER

Risk of Mercury Do not allow mercury to come into contact with skin. If contact does occur, thoroughly wash the affected area with clean water immediately. If mercury is accidentally spilled, it should be drawn off with a syringe or the like and kept in a glass bottle.

WARNING

Risk of Electric Shock Turn off the power before carrying out any wiring.

CAUTION Do not perform an insulation resistance test using a me ohmmeter except on the ship's power terminals. Performing such a test may cause a failure in the gyro system

Precautions in handling the gyro-sphere

Hold the gyro-sphere firmly with both hands so as not to subject it to any shock. Do not drop the gyro-sphere. Dropping the gyro-sphere may result in damage to the internal mechanism or lead to personal injury. Do not disassemble the gyro-sphere.

Precautions in handling the container Hold the container firmly with both hands. Do not drop it. Dropping the gyro-sphere may result in damage to the internal mechanism or lead to personal injury.

Polishing of the slip ring is prohibited Carry out cleaning by wiping dirt off the slip ring with ethyl alcohol or ligroin

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1. SUMMARY

This chapter briefly describes operating procedures that are regarded as essential to the operation of the CMZ700B Gyrocompass. For details, see Chapter 2 and subsequent chapters. Use Chapter 1 as a simplified manual.

(1) Components and functions of Switch Unit and M.Operation Unit (2) Handling precautions (3) Startup and stoppage (4) List of Operations (5) Advice for Specific Situations

(6) Definition of Terms

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1.1 Components and Functions of Switch Unit and M.Operation Unit

No. Name of Switches Functions

Power switch Turns on/off the power to the gyro system. External sensor selector switch Selects the output heading (gyro heading/external sensor

heading. In select the C operation., this function Is not permitted. See section 7)..

Set/dimmer keys In normal mode these are dimmer keys that adjust the level of brightness of all displays on the operation unit. If both keys are simultaneously pressed, a lamp test is performed. In modes other than normal, these keys are used to set data.

Command/buzzer stop key If this key is pressed in normal mode, the mode changes to the command selection mode, and if pressed in a mode other than normal, the mode returns to normal. If pressed when an alarm is generated, the alarm buzzer and blinking of the FAIL indicator lamp stops.

ENT key Enters the data you set.

Gyro heading display Displays a master compass heading. Data display Displays the current data, and settings when executing a

command. Displays "C.S." during standby.

Command display Displays a command code. RUN indicator lamp Lights up when the power switch is turned "on." EXT indicator lamp Goes out when the currently selected output heading is the

gyro heading and lights up when the output heading is the external sensor heading.

FAIL indicator lamp Blinks when an alarm is generated. If the "BZ STOP" key is pressed, it lights up during an alarm and goes out when the alarm is restored to normal.

Switch Unit M.Operation Unit If key or is to be operated, keep the key pressed for at least two seconds.

ON

OFFPOWER

GYROCOMPASS

RUN

EXT

FAIL

EXT

ENT

GYRO HEADING

COMMAND DATA

SET/DIMMER

YOKOGAWAYokogawa Denshikiki Co.,Ltd.

SHIFT

COMMAND

BZ STOP

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1.2 Handling Precautions

1.2.1 Startup of Gyrocompass

(1) Startup the gyrocompass at least 5 hours before the ship's departure. (2) After startup, do not touch the internal unit of the master compass.

Otherwise the equipment may be damaged or an error generated.

1.2.2 Handling in Cold Districts

Since the master compass container containing the gyro-sphere is filled with supporting liquid, if a gyrocompass is to be stopped in a cold district where the ambient temperature is 3C or less it should therefore be handled as shown below.

(1) In the case where it is stopped for a period of a few days or less: Wrap the master compass in a blanket or the like to provide heat insulation.

(2) In the case of a prolonged stopping period (a week or more): Drain the liquid completely.

1.2.3 External Heading Out Put

External heading can use with the master compassamplifier unit. Turn on the main power of the master compass (MKM022) in case of using external heading

CAUTION

Polishing the slip ring is prohibited Carry out cleaning by wiping dirt off the slip ring with ethyl alcohol or ligroin.

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1.3 Startup and Stoppage

(1) Procedure for Gyrocompass System Startup

(2) Procedure for Gyrocompass System Stoppage

Turn off the master compass mainpower switch.

Stoppage

Turn on each of the ship's AC and DCpower supplies for the gyrocompass

system.

Turn on the main power switch of themaster compass.

If AC power is not supplied to thesystem, turn on DC power only.

Revolution of the gyro rotor is high.Phase current is higher than 0.35A(See Section 4.1 of this manual.)

Revolution of the gyro rotor is low.Phase current is 0.35A or less(See Section 4.1 of this manual.)

Cold start Hot start

RUN indicator lamp is it.Data display "C.S."The follow-up operation of the master compass stops.Aligning operation is prohibited.Phase current decreases blow 0.35A and when its rate-of-change becomes low, the compass enters nomal operating status.

Normal status

The gyrocompass enters nomal operating status immediately.

The command display and data display disappear.

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1.4 Command Code List Call-up codes for various data displays/settings in the CMZ700 gyrocompass system are assigned to the predetermined numbers (command codes). This section describes the command codes and their functions and whether they can be executed or not during stand-by period.

Classification Command Code

Execution during standby

Function Item Page

00 Normal mode 4-7 13 Gyro-sphere running time display 4-7 15 Gyro-sphere phase current display 4-8 16 Backup battery voltage display 4-8

Display Function

19 Software version number display 4-8 21 Speed setting for speed-error correction 4-9 22 Latitude setting for speed-error correction 4-10 23 Automatic alignment of master compass 4-10 24 Manual alignment of master compass 4-11 26 Displaying/resetting cause of master

compass alarm 5-3

Setting Function

29 Startup timer setting 4-12 30 Permission for maintenance function 6-19 31 Simulated DAC output 6-20 32 Manual drive of master compass 6-21 33 Manual drive of repeater compass 6-21 34 Resetting gyro-sphere running time 6-22 36 Initialization of backup memory 6-22 37 Correction of the master compass

installation error 6-23

38 Setting the master compass follow-up gain 6-24

Maintenance Function

39 Error log display 6-25 40 Permission for generation function 6-26

Generation Function

41 Setting the follow-up speed for stepper signal

6-27

""means that execution is permitted during stand-by. "" means that execution is not permitted during stand-by.

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1.5 Advice for Specific Situations (1) If it is suspected that there is an error in a heading shown by a repeater compass or an autopilot:

Check the settings for the ship's speed and latitude for correcting speed-error using command codes 21 and 22. If they are not correct, correct the values.

(See 4.7.1 of this manual.) Set the ship's speed to zero and check that indications on the master compass and repeater compass are the same. If they are not, align the indications of the repeater compass and master compass.

(See 4.7.2 of this manual.)

(2) If an abnormal sounds can be heard from the master compass: Continue to operate the gyro system if there are no errors in indications of the master and repeater compasses. When there are errors in indications of the master and repeater compasses, use the external sensor selector switch to set the operation of the system so that the heading sensor is selected to "external heading."

(See 4.2 of this manual.) * In either case, replace the gyro-sphere as soon as possible.

(3) If you desire to know the gyro-sphere running time:

This can be displayed using the command code 13. However, a correct value cannot be obtained unless the running time was reset when the gyro-sphere was replaced.

(See 4.6.2 of this manual.)

(4) If you desire to know the phase current of the gyro-sphere: This can be displayed using the command code 15.

(See 4.6.3 of this manual.) (5) If you desire to implement automatic re-startup using the timer:

The timer can be set using the command code 29. (See 4.7.4 of this manual.)

(6) If you desire to reset the gyro-sphere running time:

This can be reset using the command code 34. (See 4.6.2 of this manual.)

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1.6 Definition of Terms

This section describes the definition of terms used in this manual.

Compass heading The heading detected by the master compass

True heading The heading obtained by subtracting the value of the speed error correction from the compass heading

Value of speed-error correction The error calculated from the ship's heading, speed and latitude

External heading sensor The heading sensor other than an active gyrocompass. An other gyrocompass, magnet compass or GPS compass etc.

Output heading

A heading output to external connected device (such as repeater compasses). Either the gyro heading or external sensor heading should be selected.

Gyro heading True heading

External sensor heading A heading to be input from external heading sensors (such as magnet compass/GPS compass and the like)

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2. OVERVIEW 2.1 General

The CMZ700 Gyrocompass fully conforms to the technical requirements of the IMO resolution A.424 (XI), gyrocompass performance standards, as well as to JIS F9602, Class A standards. The anti-vibration structure has been strengthened and improvement of the follow-up performance has been achieved, leading to increased rigidity of the gyrocompass in all types of ships, from small to large.

(1) High Accuracy

High accuracy is achieved because of the following configuration: The gyro-sphere, the center of the gyrocompass, is protected into the container filled with liquid, through the center pin that was supported as the influence of disturbance is decreased. In addition, two gyro-rotors rotate at a high speed and work with each other to cancel out errors due to the rolling, pitching and yawing of a ship.

(2) Ingenious damping mechanism for vibration and shock The gyrocompass is designed to disperse forces due to vibration and shock by the inclusion of liquid in the container to support the gyro-sphere. In addition, the container is protected from vibration and shock with a diaphragm rubber damper and bellows damper. The diaphragm rubber dumper has universal joints as a countermeasure against the affect of attitude change due to rolling, pitching and yawing. This configuration produces excellent resistance against vibration and shock.

(3) Improvement of Follow-up Performance A follow-up speed of 30/s has been realized by reducing the size and weight of the container. This has made smooth follow-up without delay possible in response to sudden turning as is characteristic with small ships.

(4) Digitalization of Master Compass Heading The display of the master compass heading has been changed to digital. This increases the ease of reading a heading.

(5) Digitalization of Repeater Compass Signal Electromagnetic wave noise is suppressed to a minimum by expressing the repeater compass signal in a digital form and having the driving circuit for the compass motor on the repeater compass side.

(6) Automatic Speed-error Correcting Function Speed-error is corrected automatically by entering the ship's speed signal and latitude signal respectively from the log and GPS or the like. The amount of latitude change in the case where there is no latitude signal input is estimated from a calculation of the ship's speed and heading. In a basic system, this function is implemented in C.operation unit.

(7) Functions for Various Displays and Settings Various types of gyrocompass information can be displayed and set on M..operation unit and C.Operation unit.

(8) Preparation of Outputs Corresponding to Every Requirement In addition to the digital heading signal output for the repeater compass, the stepper heading signal output, digital signal output (IEC61162-1), analog heading, quadrant, and analog rate of turn signal output are equipped as standard.

(9) Onboard Battery Drive Compass running by the onboard battery is available as standard.

(10) Remote Operation C.operation unit is optionally provided so that the gyrocompass system can be remotely operated.

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(11) Built-in Startup Timer The restart time of the timer can be set from 1 to 99 hours.

(12) Heading Output Using External Azimuth Sensor Signal Using the heading signal from the external heading sensor (GPS compass, magnet compass, etc.) signals can be output to external connecting device such as repeater compasses or a radar.

2.2 Performance and Specifications 2.2.1 Power Supply

Main power supply: 24 V DC +30%, 10% 100/110/115/220 V AC 10%, 50/60 Hz 5%, single phase (optional) Power consumption (24 V DC) At startup Approx. 3.2 A + 0.35A number of repeater compasses Steady sate Approx. 1.8 A + 0.35 A number of repeater compasses Power consumption (100 V AC) At startup Approx. 90 VA + 10 VA number of repeater compasses Steady state Approx. 52 VA + 10 VA number of repeater compasses Alarm Power supply (24 V DC) Approx. 0.1 A (annunciator unit, optional)

2.2.2 Input Signal

(1) Ship's speed signal for speed-error correction: 1 circuit (optional) Signal form: 200 pulses/n mile, or serial IEC61162-1 Device to be connected: Electromagnetic log, Doppler log, and the like

(2) Latitude signal for speed-error correction: 1 circuit (optional) Signal form: Serial IEC61162-1 Device to be connected: GPS or the like

(3) Heading signal for backup: 1 circuit Signal form: Serial IEC61162-1 Device to be connected: GPS compass, magnet compass, and the like

(4) Alarm buzzer stop signal: 1 circuit, contact In the basic system, the C.operation unit is necessary for inputting the signals of (1) and (2). Format generation is possible with serial signals (1), (2), and (3).

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2.2.3 Output Signal

(1) Repeater compass signal: 3 circuits Signal form: Serial IEC61162-1 sentence Device to be connected: Repeater compasses

(2) Stepper heading signal: 1 circuit, capacity 0.3 A 9 circuits via optional distribution unit

Signal form: 24 V DC, 3-bit gray code, 1/6 degree/step Device to be connected: Radar, ARPA, INMARSAT etc.

(3) Serial heading/rate-of-turn signal: 3 circuits, individual format generation possible Signal form: Serial IEC61162-1 Device to be connected: Autopilot, multi-display, etc.

(4) Analog heading and quadrant signals: 1 circuit each Signal form: 0 to 5 V DC Device to be connected: Course recorder, evaluation/measuring units, etc.

(5) Analog rate-of-turn signal: 3 circuits, individual range setting possible Signal form: 0 to 5 V DC; 30, 100, and 300/min Device to be connected: Rate-of-turn indicator etc.

(6) No-voltage alarm signal: 1 circuit, contact Signal form: "Open" or "closed" when no voltage is applied

(7) Gyro failure alarm signal: 1 circuit, contact Signal form: "Open" or "closed" when gyro fails

(8) Heading selection signal: 1 circuit, contact Signal form: "Open" or "closed" when gyro is selected

2.2.4 Settling Time and Accuracy

(1) Settling time: Within 6 hours (The gyro can actually be used after about 2 hours from start.)

(2) Accuracy: Within 0.25/cos ( being the latitude at that location) (3) Follow-up accuracy: 0.1 or less (4) Maximum follow-up speed: 30/s

2.2.5 Environmental Specifications (normal operating conditions)

(1) Allowable roll and pitch: 40 for both rolling and pitching (2) Allowable vibration: 1.5 mm p-p or less for 5 to 8 Hz 0.35 mm p-p or less for 8 to 25 Hz 0.1 mm p-p or less for 25 to 50 Hz (3) Operating temperature range: 10C to +55C

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2.2.6 External Input/Output Signal Specifications and Circuits

Signal Name Abbreviation Circuit/signal Specifications Serial signal input

RDAM RDBM

Number of connectable circuits: 1 or 3 (C.operation unit used) Data contents: Heading, ship's speed (optional) and latitude (optional) Receiving circuit: Photo-coupler Transmission format: Asynchronous serial data signal Transmission rate: To be selected from 2400/4800/9600 bps. Data format: See Subsection 6.4.6 Data generation is possible from C.operation unit.

Ship's speed pulse input (optional)

Number of connectable circuits: 1 Pulse rate: 200 pulses/n mile Signal format: Open collector (photo-coupler) or volt-free contact Applied voltage: 5 V DC Current value: 2 mA (in ON state) Saturation voltage: 0.4 V DC or less (for transistor contact)

P

N

510 2SK209 PS2703-1

1SS220

P

N

5V

2.2K

47K

0.01F

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Repeater compass heading output

SD1AR SD1BR SD2AR SD2BR SD3AR SD3BR SG

Number of connectable circuits: 3 Transmission system: RS422 (use a driver circuit equivalent to RS422A or RS485) Transmission format: Asynchronous serial data signal Transmission rate: 4800 bps Transmission period: 50 ms Character configuration: Start bit 1, Data bit 8, Stop bit 1, Parity None Data format: IEC61162-1 and YDK original format

LTC485

RO

RE

DE

DI

Vcc

A

B

GND

Vcc

P

N

SHIIEL

SD1A

SD1B

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Signal Name Abbreviation Circuit/signal Specifications Stepper heading input

REF SS3 SS2 SS1 COM

Signal format Number of connectable circuits: 1 or 9 (optional) COM: 0 V (circuit GND) REF output voltage: 24 V DC, 35 V DC (optional) REF output current: 0.3 A max., 1 A max. (optional) Output form: Open collector output (24 V DC 3-bit gray code) Source current: each 0.15 A max.

REF

SS1

SS2

SS3

ReceiverMastercompass

+24VDC REF

SS1

SS2

SS3

RecMastercompass

+24VDC

AlarCir.Com.

< 4 wiring > Control circuit < 5 wiring > Control circuit

REF-SS1

REF-SS2

REF-SS3

+24VDC

+24VDC

+24VDC

0 6/63/6

1

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Serial signal output

SD1A SD1B SD2A SD2B SD3A SD3B SG

Number of connectable circuits: 3 Transmission system: RS422 (use a driver circuit equivalent to RS422A or RS485) Transmission format: Asynchronous serial data signal Transmission rate: To be selected from 2400/4800/9600 bps. Transmission period: See Subsection 6.4.4 Data format: See Subsection 6.4.6

LTC485

RO

RE

DE

DI

Vcc

A

B

GND

Vcc

P

N

SHIIEL

SD1A

SD1B

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Signal Name Abbreviation Circuit/signal Specifications Analog heading quadrant signal

HDG QUD COM

Signal format Number of connectable circuits: 1 each COM: 0 V (circuit GND) Output voltage: 0 to +5 V DC Output resolution: 2.5 mV Output impedance: 2 k max. Recommended input impedance of connected device: 500 k min. Output accuracy: 1% (at 25C)

Receiver

LF398 1K

0.1F

1K

5.00

0V

Output Level

0 90 180 270 360

Output

5.00

3.75

2.50

1.25

0V

0 90 180 270 360

Heading signal

Quadrant signal

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Analog rate-of-turn output

ROT1 ROT2 ROT3 COM

Signal format Number of connectable circuits: 3 COM: 0 V (circuit GND) Output voltage: 0 to +5 V DC Output resolution: 2.5 mV Output impedance: 2 k max. Recommended input impedance of connected device: 500 k min. Output accuracy: 1% (at 25C)

Output Level5.0004.844

2.500

0.1580V

- 30/min-100-300

0/min 30/min100300Rate of turn

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Signal Name Abbreviation Circuit/signal Specifications Buzzer stop contact input

BSP BSN

Contact closed: At buzzer stop Connecting switch (contact) rating: 24 V DC, 0.05 A min.

Heading selection contact output

GM GMC

Jumper-1 and -2 short-circuited: Contact ON when gyro selected (STD) Jumper-2 and -3 short-circuited: Contact OFF when gyro selected

Gyro failure alarm contact output

GF GFC

Jumper-1 and -2 short-circuited: Contact OFF when gyro fails (STD) Jumper-2 and -3 short-circuited: Contact ON when gyro fails

No voltage alarm contact output

NV NVC

Jumper-1 and -2 short-circuited: Contact OFF when there is no voltage (STD) Jumper-2 and -3 short-circuited: Contact ON when there is no voltage

5V

1KPS2703-1

RL JP1

32

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3. HARDWARE 3.1 System Configuration

Power Supply (24VDC)

Power Supply(100 to 220VAC , 50/60Hz)

MASTER COMPASS(MKM022)

CMZ700BStand-alone type

24VDCPowerSupply

(OPTION)AC ADAPTER(MKR027)

01

23

4

5

6

78

9

AUTO PILOTIBSINSetc

INMARSATRADARGPSetc

Serial Signal forREPEATER COMPASS

Analog(05V)

STEPPER SIGNALSerial Signal (IEC1162-1)

Course Recorder(KR100A/180A)

RATE OF TURN(MKR302/303)

Steering RepeaterCompass (MKR051)

Bearing RepeaterCompass (MKR050)

( Device to be connected )

ConnectionBox (MKN015)

HorizontalStand(KX223A)

HorizontalBracket(KX201A)

TiltingBracket(KX213)

MMI(OPTION)

OPERATION UNIT(MKR024)

MMI (OPTION)ANNUNCIATOR(MKR028)

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3.2 Component Models

Master compass Stand-alone type Gyro sphere MKM022-1 KT005 Gyrocompass CMZ700B Pilot stand type MKM022-2 Console type MKM022-3 Repeater compass Gland type Horizontal stand MKR050-G KX223A Connection box Horizontal bracket MKN015-G KX201A Tilting bracket KX213 Plug type Horizontal stand MKR050-P KX223A Connection box Horizontal bracket MKN015-P KX201A Tilting bracket KX213 Steering Repeater Compass MKR051 AC Adapter MKR027 Annunciator unit MKR028 C. Operation unit MKR024

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3.3 Component Names and Functions (1) Master Compass ( MKM022 )

The components of the master compass and their functions are summarized below. ( For details of exchange parts, refer to Appendix-2 Components List. )

No Name Function 1 Case Protects the internal unit. 2 Cover Protects the follow-up mechanism. 3 Front cover Protects the follow-up mechanism. 4 Switch unit For turning on or off the main power supply. 5 M..operation unit The components of the control panel and their functions are summarized below. 6 Container Assy Contains the gyrosphere. 7 Gyrosphere Contains the rotator 8 Dumper Assy Protects the Container Assy and Gyrosphere

9 Follow-up mechanism Provides a follow-up function by means of a stepping motor and gear mechanism.

10 Main Assy Main control board. 11 Inverter Assy For control. Produce power source for gyro-sphere drive. 12 PS1,PS2 Assy Supplies power to individual units. 13 Noise filter Suppresses noise. 14 Terminal board For analog signal output. 15 Terminal board For serial signal and stepper output.

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(2) Repeater Compass ( MKR050-G or P ) The components of the repeater compass and their functions are summarized below.

No Name Function 1 Shadow pin mounting hole For installing the shadow pin which measures the azimuth of a target.

2 Mounting hole ( for a horizontal stand or bracket )

Allows the repeater compass to be attached to the gimbals ring on a horizontal stand or bracket.

3 Mounting hole ( for a tilting bracket )

Allows the repeater compass to be attached to a tilting bracket.

4 Connector For connection to a connection box ( for the MKN015-P ) 5 Cable Connects the repeater compass to a connection box( for the

MKN015-P or G )

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(3) Connection Box ( MKN015-P or -G ) The components of the connection box and their functions are summarized below.

No Name Function 1 Dimmer Controls the illumination intensity of the repeater compass card.. 2 Reset switch Used when there has been a shift in the value indicated by the repeater compass. 3 LED lamp ( green ) This LED blinks when zero adjustment is being carried out. Normally it is lit. 4 LED lamp ( red ) This LED is lit or blinks when an error is detected. Normally it is off. 5 Connector For an input cable clamp. 6 Gland For a repeater compass cable clamp.

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(4) Horizontal Stand ( KX223A ) The components of the horizontal stand and their functions are summarized below.

No Name Function 1 Cover 2 Support 3 Stand 4 Base line Allows the horizontal stand to be aligned with the bow-to-stern line of the

ship. 5 Repeater mounting shaft For installing a repeater compass ( keeps the repeater compass horizontal ). 6 Gimbals ring Keeps the repeater compass horizontal.

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(5) Horizontal Bracket ( KX201A ) The components of the horizontal bracket and their functions are summarized below.

No Name Function 1 Repeater mounting shaft For installing a repeater compass ( keeps the repeater compass

horizontal ). 2 Gimbals bearing Keeps the repeater compass horizontal. 3 Gimbals ring Keeps the repeater compass horizontal. 4 Mounting hole For mounting a horizontal bracket to the ship.

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(6) Tilting Bracket ( KX213 ) The components of the tilting bracket and their functions are summarized below.

No Name Function 1 Repeater mounting bolt For installing a repeater compass and adjusting its tilting angle. 2 Arm For supporting a repeater compass and adjusting its tilting angle. 3 Arm fastening bolt For Fastening an arm and adjusting its horizontal position. 4 Mounting hole For mounting a tilting bracket to the ship.

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(7) Steering Repeater Compass ( MKR051) The components of the steering repeater compass and their functions are summarized below.

No Name Function 1 Front panel For panel mount fitting. 2 Scale(360/rev) Heading scale card 3 Scale(10/rev) Heading scale card 4 Fail lamp(red) This LED is lit or blinks when an error is detected. Normally it is off. 5 Run lamp(green) This LED blinks when zero adjustment is being carried out. Normally it is lit. 6 Dimmer . Controls the illumination intensity of the repeater compass card.. 7 Motor Drive the heading scale card 8 Photo sensor Adjust the repeater compass card to 0(zero) point

9 Lamp Light up the repeater compass card 10 RPT CPU Assy Input a heading signal and control motor drive 11 RPT TB Assy In put and out put Terminal board 12 Box Protects the internal unit.

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(8) AC Adapter ( MKR027) The components of the ac adapter compass and their functions are summarized below.

No Name Function 1 Power supply Input AC100V220Vout put DC 24V 2 Fuse (15A) Protect the AC adapter circuit 3 Fuse (15A) Protect the AC adapter circuit 4 Fuse (10A) Protect the AC adapter circuit 5 Fuse (10A) Protect the AC adapter circuit 6 Fuse (2A) Protect the AC adapter circuit 7 Fuse (2A) Protect the AC adapter circuit 8 Switch Power switch

9 Terminal board For output AC power supply 10 Terminal board For input AC power supply 11 Back up assy For backup DC24V power supply . If AC power supply is shut down ,output

DC 24Vpowersupply is supplied for the gyrocompass system whith this assy.

12 Box Protects the internal unit. 13 Noise Filter noise filter for Input power supply

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(9) Annunciator ( MKR028) The components of the annunciator and their functions are summarized below.

No Name Function 1 LED lamp This LED blinks when Gyrocompass AC power supply shut down. 2 Push switch For buzzer stop 3 Annunsiator assy Control Buzzer and LED blink 4 Box Protects the internal unit.

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(10) C. operation unit ( MKR024) The components of the c operation and their functions are summarized below

.

No Name Function 1 Sheet assy Operate command set and key enter 2 DISP assy Display heading and etc, monitor. Alarm LED is lit or blinks when an error is

detected 3 C,OPE MAIN assy Main control board. 4 POW assy It is supplied. to individual units. 5 Cable Connect the master compass()

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4. OPERATION 4.1 Startup and Stoppage 4.1.1 Startup

Start up the gyrocompass at least 5 hours before performing normal operation. After the power switch is turned on, the gyrocompass system is started up at either hot start or cold start depending on the condition of the gyro-sphere. If the gyro rotor is rotating at a high enough speed to detect the heading, hot start begins, however, if it is rotating at a speed that is too low to detect the heading, cold start begins. The rotating status of the gyro rotor is determined by monitoring the phase current.

(1) Hot start

Hot start begins if the value of the phase current immediately after turning on the power is 0.35 A or less and follow-up of master compass, signal input/output, and indicator lamps are normal.

(2) Cold start

Cold start begins if the value of the phase current immediately after turning on the power is higher than 0.35 A. The stand-by state continues until the phase current drops and the rate of change in the phase current drops below a specified level. Normal operation will start when these requirements are met. During stand-by, functions of master compass automatic aligning and manual aligning cannot be carried out. After about 2 hours, the heading indication settles and the gyrocompass is ready for operation.

Normal

Phase curent0.35A

Time

Time

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Phase curent0.35A

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4.1.2 Startup Indications

The section describes the indications on the M..operation unit at startup. If the system is activated by a cold start (stand-by state), the display shown in item (1) below appears. When the rotating speed of the gyro-rotor is fast enough, the system enters normal mode and the display changes to the item (2). In case of hot start, the display shown in item (2) below appears immediately.

(1) Example of indications during stand-by

The gyro heading display indicates the compass heading when the power was last turned off, and the data display indicates "C.S."

(2) Example of indications when released from stand-by and for hot start

The gyro heading display indicates the current compass heading and the data display indication disappears.

4.1.3 Stoppage

When the power switch is turned off, all power is cut.

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4.2 Functions and Operations of Switch Unit and M.Operation Unit Components This subsection describes the functions and operations of switch unit and M.operation unit components. If key or is to be operated, keep the key pressed for at least two seconds. Name of Switch Functions and Operations

Power switch Turns on/off the power to the gyro system. External heading sensor selector switch

If the switch is kept pressed for 2 seconds or more when in normal mode, the output heading (gyro heading/external heading) is selected.

Set/dimmer key In normal mode these are dimmer keys that adjust the level of brightness of all displays on the M.operation unit. The displays can be darkened by pressing the key and brightened by pressing the key. Brightness can be adjusted in 32 steps. If two keys are simultaneously pressed, a lamp test is performed. If the key is pressed in command selection mode or command execution mode, data is input. Pressing the SHIFT key changes the input digit (blinks) while pressing the UP key changes the numeric value in the input digit.

Command/ buzzer stop key

If this key is pressed in normal mode, the mode changes to the command selection mode, and if pressed in command selection mode or command execution mode, the mode returns to normal. If pressed when an alarm is generated, the alarm buzzer and blinking of the FAIL indicator lamp stops.

ENT key Enters an input value in command selection mode or command execution mode. To carry out operations with this key switch, keep it pressed for 2 seconds.

Gyro heading display Displays a compass heading. Data display Displays/sets data when a command is executed. Command display Displays a command code. RUN indicator lamp Lights up when the power switch is turned "on." EXT indicator lamp Goes out when the currently selected output heading is the gyro heading

and lights up when the output heading is the external sensor heading. FAIL indicator lamp Blinks when an alarm is generated.

If the "BZ STOP" key is pressed, it lights up during an alarm and goes out when the alarm is restored to normal.

ON

OFFPOWER

GYROCOMPASS

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4.3 Mode Selection This section describes various operations performed with the M.operation unit.

(1) Normal mode

This is the mode at normal condition or hot start. The gyro heading display shows a compass heading, indications in the command and data displays disappear (during stand-by, "C.S." is displayed). If the COMMAND key is pressed during this state, "00" is displayed in the command display (the tens digit blinks) and the mode changes to command selection mode.

(2) Command selection mode

Change the digit to be entered (blinking) by pressing the SHIFT key and then change its numeric value by pressing the UP key (0 1 2 3 4 5 6 7 8 9 0 ). Perform this operation to enter a command code. Keeping the ENT key pressed for 2 seconds after entering a command code, changes the mode to selected command execution mode.

(3) Command execution mode

If the selected command code is in its 10's (display functions), the command is immediately executed. However, if the command code is in its 20's (setting functions) or 30's (maintenance functions), the command is not executed unless the ENT key is kept pressed for another 2 seconds. When in command selection mode or command execution mode, the mode can be returned to normal at any time by pressing the COMMAND key. In addition, if the selected command code is not correct (relevant number does not exist or rejected status for the maintenance function), the mode also returns to normal.

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4.4 Data Input Procedure This section describes the numeric value input procedure using the example of setting the latitude for speed-error correction.

(1) Command code input (00 to 99)

Change to command selection mode by pressing the COMMAND key. "00" is displayed in the command display and the tens digit (digit to be entered) blinks.

Change the digit to be entered (tens digit/units digit) by pressing the SHIFT key and then change the numeric value for the digit to be entered (0 1 2 3 4 5 6 7 8 9 0 ) by pressing the UP key. Carry out these procedures to enter "22" of the command for setting the latitude for speed-error correction.

The entered value blinks if the ENT key is kept pressed for 2 seconds to enable the operator to confirm the value. If the ENT key is pressed for another 2 seconds, the entered value is displayed continuously and the command code "22" is executed.

(2) Latitude input (70 to +70)

The current set value for the latitude for speed-error correction is displayed in the data display and its tens digit blinks (digit to be entered). The figure to the right shows an example of displaying 00 N.

Change the digit to be entered by pressing the SHIFT key in the same way as is done for command code input and then change the numeric value in the digit to be entered by pressing the UP key.

If a negative value is to be entered, set the digit to be entered to the most significant digit (tens digit) and continue to press the UP key. The entered value changes from "00" "10" "70" "70." "60." . Since the decimal point after the least significant digit means minus, "60." shows as 60 S. The figure to the right is an example showing 13 S. After entering the latitude, the entered value blinks if the ENT key is kept pressed for 2 seconds to enable the operator to confirm the value. If the ENT key is pressed for another 2 seconds, the entered value is displayed continuously and is set as the final value.

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4.5 Command Functions This section describes, the command codes and their functions and whether they can be executed or not during stand-by period.

Classification Command Code

Execution during stand-by

Function Item Page

00 Normal mode 4-7 13 Gyro-sphere running time display 4-7 15 Gyro-sphere phase current display 4-8 16 Backup battery voltage display 4-8

Display Function

19 Software version number display 4-8 21 Speed setting for speed-error correction 4-9 22 Latitude setting for speed-error correction 4-9 23 Automatic alignment of master compass 4-10 24 Manual alignment of master compass 4-11 26 Displaying/resetting cause of master

compass alarm 5-3

Setting Function

29 Startup timer setting 4-12 30 Permission for maintenance function 6-19 31 Simulated DAC output 6-20 32 Manual drive of master compass 6-21 33 Manual drive of repeater compass 6-21 34 Resetting gyro-sphere running time 6-22 36 Initialization of backup memory 6-22 37 Correction of the master compass

installation error 6-23

38 Setting the master compass follow-up gain 6-24

Maintenance Function

39 Error log display 6-25 40 Permission for generation function 6-26

Generation Function 41 Setting the follow-up speed for stepper

signal. 6-27

"" means that execution is permitted during stand-by. "" means that execution is not permitted during stand-by.

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4.6 Display Functions This section describes how to display various information. The following 5 items can be displayed: (1) Compass heading display (normal mode) (2) Gyro-sphere running time display (3) Gyro-sphere phase current display (4) Backup battery voltage display (5) Software version number display

4.6.1 Displaying Compass Heading (normal mode)

The gyro heading display indicates the current compass heading. The figure to the right shows an example of displaying compass heading of 123.4. During the stand-by period, "C.S." is displayed in the data display. If the EXT key is pressed, the output heading currently selected can be changed from gyro heading to external heading and vice-versa. Pressing the or keys adjusts the brightness of the M.operation unit displays. Pressing the COMMAND key changes the mode to command selection mode.

4.6.2 Displaying Gyro-sphere Running Time

Running hours of the current gyro-sphere is displayed (from 000000 to 999999 hours). If the command code "13" is executed, the upper two digits of the six digits of the gyro-sphere running time are displayed in the data display. If the SHIFT key is pressed, the middle two digits of the six digits are displayed, and if the SHIFT key is pressed once more the lower two digits of the six digits with a decimal point after the least significant digit are displayed. If for example, the running time of the gyro-sphere is 1952 hours, the digits "00" "19" "52." will be displayed. If the COMMAND key is pressed, the mode returns to normal.

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4.6.3 Displaying Gyro-sphere Phase Current

The gyro-sphere phase current (current for driving the gyro-sphere) is displayed (0.00 to 0.99 A). Normal value : from 0.25A to 0.35A. If the command code "15" is executed, two decimal places of the gyro-sphere phase current are displayed in the data display. The figure to the right shows an example of 0.27 A of the gyro-sphere phase current. If the COMMAND key is pressed, the mode returns to normal.

4.6.4 Displaying Backup Battery Voltage

The voltage of the battery for backup memory is displayed (from 0.0 to 9.9 V). Normal value : from 2.5V to 4.0V If the command code "16" is executed, the backup battery voltage is displayed in the data display. The figure to the right shows an example of 3.6 V for the voltage of the backup battery. If the COMMAND key is pressed, the mode returns to normal.

4.6.5 Displaying Software Version Number

The version number of the software installed in the master compass is displayed. If the command code "19" is executed, the software version "A" which is defined as "1" is displayed in the data display. The figure to the right shows an example of displaying version "D." If the COMMAND key is pressed, the mode returns to normal.

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4.7 Setting Functions This section describes how to set the functions that are regarded as essential for running the gyrocompass. The following describes four function settings: (1) Speed-error correcting function (2) Automatic master compass alignment function (3) Manual master compass alignment function (4) Startup timer setting function

4.7.1 Speed Error Correction

(1) Setting the Ship's Speed (procedure for setting the ship's speed for correcting speed-error) If the command code "21" is executed, the current speed is displayed in the data display and its tens digit (digit to be entered) blinks. Press the shift key to change the digit and then change the numeric value of the digit by pressing the UP key to enter a new speed (from 00 to 99 kt). The figure to the right shows an example of entering the speed 10 kt. After entering the speed, the entered value blinks if the ENT key is kept pressed for 2 seconds to enable the operator to confirm the value. If the ENT key is pressed for another 2 seconds, the entered value is displayed continuously and is set as the final value. If the COMMAND key is pressed, the mode returns to normal.

(2) Setting Latitude (procedure for setting the latitude for correcting speed-error)

If the command code "22" is executed, the current latitude is displayed in the data display and its tens digit (digit to be entered) blinks. If the latitude displayed is south, a decimal point is displayed after the least significant digit. For example, with a latitude of 16 S, "16." is displayed. To change the digit, press the SHIFT key and then change the numeric value of the digit by pressing the UP key to enter a latitude (from 00 N or S to 70 N or S). The figure to the right shows an example of entering 45 N. After a value for the latitude has been entered, the entered value blinks if the ENT key is kept pressed for 2 seconds to enable the operator to confirm the value. If the ENT key is pressed for another 2 seconds, the entered value is displayed continuously and is set as the final value. If the COMMAND key is pressed, the mode returns to normal.

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Determine the true heading by calculating a value for speed-error-correction from the values of speed and latitude. True heading (deg) = (Compass heading) (Speed-error-correction value) Speed-error-correction value (deg) = Ship's speed (kt) cos (Compass heading)

5 cos (Latitude)

4.7.2 Automatic Master Compass Alignment

This is a function to align the azimuth of the container and the compass heading by detecting the zero point of the gyrocompass system again. If the command code "23" is executed, alignment starts and the container rotates to detect the zero point: "CA" blinks in the data display and the alignment can be suspended by pressing the COMMAND key. If the alignment is completed normally, "CA" is still displayed but stops blinking and the gyro heading display indicates "000.0" (see the figure to the right). If the alignment is not successful (zero point cannot be detected), an alarm is generated and the "CA" continues to blink. If this occurs, carry out manual alignment. If the COMMAND key is pressed, the mode returns to normal.

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4.7.3 Manual Master Compass Alignment

If Automatic master compass alignment cannot be executed, this function can be performed to align the azimuth of the container and the compass heading manually. The ships speed is set to 00 by executing the command codes 21. The setting procedure includes relative value alignment and absolute value alignment. (1) Setting mode for relative value alignment (2) Setting mode for absolute value alignment ( If the command code "24" is executed, the data display indicates "AE," the gyro heading display indicates "000.0" and the mode changes to relative value alignment setting mode. If the EXT key is kept pressed for 2 seconds, the data display indicates "AH" and the gyro heading display indicates the current compass heading and the mode changes to the absolute value alignment setting mode. (Switch between the setting modes with the EXT key.) The hundreds digit (digit to be entered) of the display in the gyro heading display blinks. To change the digit, press the SHIFT key and then change the numeric value of the digit by pressing the UP key (relative value: 180.0 to 180.0 degrees; absolute value: 000.0 to 359.9 degrees). If a negative value is to be entered, set the digit to be entered to the most significant digit (hundreds digit) and press the UP key several times until the data display indicates "AE." display. After entering a heading, the entered value blinks if the ENT key is kept pressed for 2 seconds to enable the operator to confirm the value. If the ENT key is pressed for another 2 seconds, the entered value is displayed continuously and is set as the final value. If the COMMAND key is pressed, the mode returns to normal.

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4.7.4 Startup Timer Setting

This function restarts the gyro system automatically after a preset time. If the command code "29" is executed, the data display indicates "00" and its tens digit (digit to be entered) blinks. To change the digit, press the SHIFT key and then change the numeric value of the digit by pressing the UP key to enter the startup time (00 to 99 hours). The figure on the right shows an example of setting the time of the startup timer to 8 hours. After setting the time, the value blinks if the ENT key is kept pressed for 2 seconds to enable the operator to confirm the value. If the ENT key is pressed for another 2 seconds, the entered value is displayed continuously and is set as the final value and the mode changes to timer startup mode. If the COMMAND key is pressed before moving to timer startup mode, the mode returns to normal. If the mode enters timer startup mode, the time remaining before restart is displayed in both the gyro heading display and data display. The figure on the right shows an example of displaying the time before restart as 7 hours 59 minutes and 13 seconds. If the ENT key is kept pressed for 2 seconds when in timer startup mode, the timer is turned off and the system can be started up immediately. Normally, when the system starts up, the sensor for the output heading is the same as when the power was last turned off. However, whenever the system starts up by the timer, the output heading is set as the gyro heading.

CAUTION

Not power off the gyrocompass system during timer startup mode

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4.8 Procedures for Operating Repeater Compass

4.8.1 Basic Operation

The repeater compasses receive a serial signal from the master compass, and the compass cards turn so as to indicate the true heading. If power is supplied from the master compass, the compass cards turn and zero adjustment is carried out. If this occurs, the zero adjustment LEDs blink. When the pointers align with zero on the compass cards, the zero adjustment LEDs stop blinking and remain lit. If a heading signal is sent from the master compass using a serial signal, the compass cards turn and indicate the true heading.

4.8.2 Connection Box

Zero adjustment switch Used when there has been a shift in the value indicated by the repeater compass. Dimmer Turning this knob adjusts the illumination of the compass card, and error and zero adjustment LEDs. Zero adjustment LED (green) This LED blinks when zero adjustment is being carried out. Normally it is lit. Error LED (red) This LED is lit or blinks when an error is detected. Normally it is off.

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5. MAINTENANCE AND INSPECTION

Implement the following procedures of the daily inspection and regular inspection to maintain the gyrocompass in a state of normal working order:

5.1 Daily Inspection

Inspection Item Inspection Contents and Procedure Recommended Inspection Interval

1 Gyro-sphere drive current

Check that the current is within the range 0.2 A to 0.35 A by executing the command code "15" using the M.operation unit or the C.operation unit.

Once/month (at an arrival)

2 Repeater compass alignment

Check that the heading of each repeater compass agrees with that of the master compass. 1

Once/departure

3 Ship's speed value Latitude value

Check that there are no errors in ship's speed and latitude by executing the command codes "21" and "22" in the M.operation unit or the C.operation unit.

Once/day

4 Azimuth error Check that there is no azimuth error using astronomical or physical target observation.

Once/day

1 Check the readings of the repeater compass card when the ship's speed is set to "0." If a speed-error correction is performed, the master compass card reading will not agree with the repeater compass card reading.

5.2 Regular Inspection Perform the following maintenance once a year.

Inspection Item Procedure

1 Gyro-sphere Cleaning of mercury pot Cleaning of lower electrode Cleaning of follow-up electrode

2 Container

Cleaning of inside surface Cleaning of center pin (Exercise care when handling.) Cleaning of lower electrode Cleaning of follow-up electrode

3 Supporting liquid Mercury Insulator

Replace

(Note) For disassembling and assembling procedures, see Chapter 6, Section 6.2.

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5.3 Troubleshooting This section describes the checking procedure for error contents when an alarm is generated and countermeasures.

5.3.1 Error Code List

Rough Classification Close Classification Error Code

Error Contents Error Code

Error Details

00 Power ON for first time 01 Power ON 03 Timer startup 07 Timer setting

00's Related to power supply

09 Power OFF 10's Gyro-sphere failure 10 350 mA or more for 20 min. (40 min. for startup)

20 50 mA or less for 3 seconds, without inverter output voltage

20's Inverter failure (Phase current shutdown)

21 50 mA or less for 3 seconds, with inverter output voltage

30 ROM failure (check sum error) 30's Memory failure

31 RAM failure (read/write error)

40's Backup battery voltage failure

40 Backup battery voltage failure

50's Follow-up failure 50 Deviation of 0.5 or more continues for 30 seconds or more

60's Operation panel switch failure

60 Continuously ON for 60 seconds or more

70 Communication failure 70's

C.operation unit communication failure 71 Abnormal data

80's Master compass alignment failure

80 Zero detection failure

90 Time-out 91 Over-run error occurred 3 times successively 92 Framing error occurred 3 times successively 93 Parity error occurred 3 times successively 94 Check sum error occurred 3 times successively

90's External sensor heading input failure

95 Abnormal data for 10 seconds or more * Error codes 00's (related to power supply) are recorded only in the error log and alarms are not

generated.

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5.3.2 How to Display the Cause of Master Compass Alarms

If the command code "26" is executed, an error code is displayed in the data display for the cause of alarm generated and detected in the master compass. A decimal point is displayed after the least significant digit of the error code. The figure to the right shows an example in which the backup battery voltage failure is being generated. An error code without a decimal point means that the error that caused the alarm has already been rectified, and if the ENT key is kept pressed for 2 seconds it will be reset and the error message will disappear. If there was no reason for the generation of the alarm, then "--" is displayed. In addition, if there is more than one cause for the generation of the alarm, the error code with the smallest code number is displayed first and the following codes can be displayed by pressing the UP key. For example, pressing the UP key may switch the displayed error codes between "40" "50" "60" . If the COMMAND key is pressed, the mode returns to normal.

RUN

EXT

FAIL

EXT

ENT

GYRO HEADING

COMMAND DATA

SET/DIMMER

YOKOGAWAYokogawa Denshikiki Co.,Ltd.

SHIFT

COMMAND

BZ STOP

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5.3.3 Possible Causes and Countermeasures

Error Code

Error Contents Possible Cause Countermeasure

10 Gyro-sphere failure Phase current of 350 mA or more continued for 20 min. or more. (40 min. for startup)

Gyro-sphere fails and there is a flow of excessive current.

Replace the gyro-sphere.

20 Inverter failure Phase current of 50 mA or less continued for 3 seconds. (no inverter output voltage)

Power unit (inverter section) failure

Wiring failure

Check the output of power unit. Check wiring and connection.

21 Inverter failure Phase current of 50 mA or less continued for 3 seconds. (with inverter output voltage)

Shutdown because of over-phase current due to gyro-sphere failure.

Wiring failure

Replace the gyro- sphere. Check wiring and connection.

30 Memory failure ROM check sum failure is generated.

Memory element failure Replace the main-assembly unit

31 Memory failure RAM read/write failure is generated.

Memory element failure Replace the main-assembly unit

40 Backup battery voltage failure Voltage of memory backup battery falls to 2.5 V or less.

Memory backup battery dissipation

Replace the main-assembly unit

50 Follow-up failure Deviation of 0.5 or more is generated for 30 seconds or more.

Follow-up mechanism failure

Motor drive circuit failure

Wiring failure

Replace the follow-up mechanism.

Replace the main-assembly unit

Check wiring and connections.

60 Switch failure ON continuously for 60 seconds or more

Switch failure in switch unit

Replace the switch unit

70 Communication failure Wiring failure between the C.operation unit and the master compass.

Check wiring and connection.

71 Abnormal data Abnormal data from the external heading input device continued for 10 seconds or more.

Check the C.operation unit.

80 Automatic master compass alignment failure (Zero point detection fails.)

Faulty zero point sensor section

Check/replace the zero point detecting sensor. Perform manual alignment using command code 24.

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Error Code

Error Contents Possible Cause Countermeasure

90 Time-out Transmission from the external heading input device stopped for 10 seconds.

Wiring failure between the external heading input device and the master compass

Check wiring and connection.

91 Over-run error 92 Framing error 93 Parity error 94 Check sum error

Failure in transmission from the external heading input device occurred 3 times successively.

95 Abnormal data Abnormal data from the external heading input device continued for 10 seconds or more.

Check the devices to be connected.

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6. INSTALLATION PROCEDURES

Only technicians of the Service department of Yokogawa Denshikiki Co., Ltd. are authorized to implement the operations and other work described in this chapter. However, if for some reason the service department of Yokogawa Denshikiki Co., Ltd. permits you to perform these operations, be sure to follow the instructions described in this chapter.

6.1 Precautions during Installation Exercise care with the following items when installing a gyrocompass.

6.1.1 Vibration Measures

The floors on which the master compass and the horizontal stands are installed, and the walls on which the remote unit, horizontal brackets, tilted brackets, course recorder, digital repeater compass, etc. are installed, should be reinforced against vibrations from the hull.

6.1.2 Parallelism of Lubber's Lines

Install the master compass, repeater compasses for the horizontal stand and repeater compasses for the horizontal bracket so that their lubber's lines are parallel with ship's fore-and-aft line. Since the accuracy of the parallelism of these lines is the basis of heading measurement, adjust them to within an accuracy of 0.5.

6.1.3 Service Area

Ensure that the dimensions of the running, operating and maintenance area of the master-compass are as specified below.

50mm or more

50mm or more

300mmor more

500mmor more

Front

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6.1.4 Limitation for Using Insulation Tester

To prevent the deterioration of electronic components, do not use an insulation tester to perform an insulation inspection or perform a withstanding voltage inspection on the master compass, remote unit and connection boxes.

6.2 Installing and Removing the Gyro-sphere This subsection describes the procedure for installing the gyro-sphere in and removing it from master compass.

6.2.1 Precautions during Removal

(1) The gyro-sphere should not be removed from the master compass until at least 1.5 hours has elapsed since the power has been turned.

(2) Make sure that the surrounding area of the master compass is clean, there is ample lighting and prepare all required equipment and tools before beginning work. To avoid damaging the nuts and bolts, be sure to use the correct tools such as drivers and wrenches for each part.

(3) Be sure to do the following to ensure proper reinstallation of the gyro-sphere: Provide mating marks to the required portions before disassembly. Temporarily reinsert the bolts into the correct holes. Place the disassembled parts in the correct order on a piece of clean paper or cloth. If wires are to be disconnected, keep a record of the color of each wire and attach labels to them to ensure correct reconnection.

(4) Do not remove any part that does not need to be disassembled. (5) Never disassemble the gyro-sphere.

DANGER

Risk of Mercury Do not allow mercury to come into contact with skin. If contact does occur, thoroughly wash the affected area with clean water immediately. If mercury is accidentally spilled, it should be drawn off with a syringe or the like and kept in a glass bottle.

CAUTION Precautions in handling the gyro-sphere

Hold the gyro-sphere firmly with both hands so as not to subject it to any shock. Do not drop the gyro-sphere. Dropping the gyro-sphere may result in damage to the internal mechanism or lead to personal injury. Do not disassemble the gyro-sphere.

Precautions in handling the container Hold the container firmly with both hands. Do not drop it. Dropping the gyro-sphere may result in damage to the internal mechanism or lead to personal injury.

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6.2.2 Installing the Gyro-sphere

If the gyro-sphere is to be installed in the container, exercise care not to subject it to shock when handling.

(1)Equipment and tools to be prepared Prepare a gyro-sphere, center pin, mercury, insulator, syringe, beaker, funnel, liquid, and No.2 Allen-type screwdriver.

(2)Installing the gyro-sphere and attaching the container to the master compass

Installation of the gyro-sphere in the container should be carried out on a flat surface and care should be taken not to knock the container over. Refer to section 6-4 for the details. Cleaning.. Confirm that oil doesn't stick to the gyro-sphere (upper, lower and following electrode) and. top of the center pin. If oil sticks, get rid of it with gauze contain ethyl alcohol.

Confirm that the drain screw in the lower container is tight and then put the gyro-sphere in the lower container.

Pour in the mercury. Attach the upper container to the lower containers.. Pour the liquid into the container. Insert the center pin and put the cap on. Pour in the insulator. Seal the vent hole. Connect the wire to the center pin. Connect the connector. The above is a brief description on how to install the gyro-sphere in the container. The following describes how to attach the container to the master compass. Engage the container into position on the master compass and tighten the bolts. Fasten the connectors that connect the master compass to the container.

Center pin

Mercury Insulator

Syringe

Beaker

70m

2ml 25ml (Only Mercury) (Only Insulator)

Caution. Comply with the below process.. If it doesn't comply with the process, it doesn't move normally, and it causes a trouble.

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Cleaning.. Confirm that oil doesn't stick to the gyro-sphere (upper, lower and following electrode) and. top of the center pin. If oil sticks, get rid of it with gauze contain ethyl alcohol.

Confirm that the drain screw in the lower container is tight and then put the gyro-sphere Confirm that an O-ring is attached. Drain screw

Hold the gyro-sphere as shown in the photo, and with the container tilted, place it into the container. Hold the sphere on the opposite side of the gold line. Do not tilt the gyro-sphere beyond the required limit (30).

After placing the gyro-sphere in the container, position the container and sphere horizontally.

Pour in the mercury.

Remove the aluminum seal with a pair of long nose pliers or a pair of diagonal cutting nippers, or the like.

Drain

Gyro-sphere

Mercury

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Attach the upper and lower containers to each other.

Hole Pin

Fill a syringe (small ,the length 70mm of the needle.) with mercury (0.3 ml). Be very careful not to spill any of the mercury. Use separate syringes for mercury and insulator.

Put the needle of the syringe at the bottom of the gyro-sphere upper electrode, and pour mercury quietly.

Confirm that there is an O-ring the upper container, then align the knock-pin and fit both the upper and lower containers to each other.

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Pour the liquid into the container.

Fit the upper and lower containers to each other by tightening the bolts (8 places).

Insert the funnel into the hole of the center pin.

Pour 500 ml of liquid into a beaker, and then slowly pour it from the beaker into the funnel until it begins to overflow from the vent hole.

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Insert the center pin and put the cap on.

.

O-ring

surface inside the upper part

If any liquid overflows from the vent hole, wipe it off with a rag. Extract a support liquid 20mm l by using the syringe for the support liquid Wipe off a surface inside the upper part with a rag

Vent hole

Confirm that there is an O-ring on the center pin and then insert the center pin. NoteApply the silicon grease on O-ring.

Put the cap on

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Pour in the insulator. Seal the vent hole.

Insulator

Remove the aluminum seal with a pair of long nose pliers or a pair of diagonal cutting nippers, or the like.

Fill a syringe (small ,the length 70mm of the needle.) with insulator (1 ml).Be careful not to spill any of the insulator. Use separate syringes for mercury and insulator.

Use the syringe to insert the insulator into the vent hole. Insert a needle in the air hole to the root This time., the tip of the needle is to be careful not to push down the gyro-sphere . Wipe off any liquid that overflows from the vent hole with a rag. If liquid does not overflow from the vent hole, use a syringe (large, 25 ml) to gently insert some more liquid into the vent hole.

Seal the vent hole with a resin washer and screw.

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Connect the wire to the center pin.

Connect this terminal to the top of the center pin. Connect the connectors.

Fasten the connectors (three terminals) that connect the upper and lower containers. Then, place the container in which the gyro-sphere is installed into the master compass.

Engage the container into position on the master compass and tighten the bolts.

Places where the container is to be engaged to the master compass Insert the container bolts from the underside and tighten them in a clockwise direction. Container bolts

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Align the mating marks when engaging the container. Then tighten the container bolts.

Fasten the connectors that connect the master compass to the container.

Connect the 4-terminal connectors.

The container hanging bolts have been tightened and the connectors have been connected.

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6.2.3 Removing the Gyro-sphere

If the gyro-sphere is to be removed from the container, first turn off power and leave it for at least 1.5 hours.

(1)Equipment and tools to be prepared Beaker, No.2 Allen-type screwdriver, syringe (Large) and a bottle for waste liquid

Beaker

(2)Removal of the container from the master compass and take-out of the gyro-sphere

Remove the connectors connecting the master compass and the container. Loosen the container bolts and remove the container from the master compass. The above describes the procedure for taking out the container from the master compass. The following describes the procedure for removing the gyro-sphere from the container. Remove the screw from the vent hole. Remove the wire connected to the center pin. Remove the cap from the center pin. Pull out the center pin. Place the beaker under the drain and remove the drain screw. Disengage the connectors that connect the upper and lower containers. Remove the bolts that fasten the upper and lower containers together. Remove the upper container. Remove the supporting liquid from within the funnel-shaped portion. Take the gyro-sphere out of the lower container.

Large

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Removing the container from the master compass: Remove the connectors connecting the master compass and the container.

Disengage the connectors (4 terminals).

Loosen the container bolts and remove the container from the master compass.

Loosen the three container bolts by turning them in a counterclockwise direction and remove the container. Be careful not to let the container hit the floor.

Take the gyro-sphere out of the container. When taking the gyro-sphere out of the container, work on a flat surface and ensure that the container does not fall over.

Remove the screw from the vent hole.

Resin washer and screw

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Remove the wire connected to the center pin. Remove the screw using a screwdriver.

Remove the cap from the center pin.

Turn the cap of the center pin to remove it.

Pull out the center pin.

An easy way to pull out the center pin is to insert the screw that is used to connect the wire to the center pin to the pin and use the screw head to draw out the pin.

Place the beaker under the drain and remove the drain screw.

The drain screw is located on the lower container.

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Drain all the supporting liquid from the drain hole while holding the container as horizontally as possible. After draining, reinsert the screw in the drain hole.

Disengage the connectors that connect the upper and lower containers.

Disengage the connectors (three terminals).

Remove the bolts that fasten the upper and lower containers together.

Remove eight bolts.

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Remove the upper container. Lift up the upper container to remove it.

Remove the supporting liquid from within the funnel-shaped portion.

Remove the supporting liquid, insulator and mercury from the funnel-shaped portion with a syringe (large). (Remove all liquids.)

Take the gyro-sphere out of the lower container.

When taking out the gyro-sphere, hold the side in a location with no gold line on it. Place the removed gyro-sphere onto a gyro-sphere stand.

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6.2.4 Replacement of Lamps in the Repeater Compass

(1) Place the repeater compass on a stand with the repeater card face down and draw alignment marks on the lower cover and the body. (2) Remove the eight mounting bolts from the lower cover. (3) Raise the lower cover to separate it from the body. (4) Hold the lower cover in this position while replacing the illuminating lamp or lamps. (5) Align the alignment marks, and then tighten the eight bolts.

Avoid disassembling the repeater compass any further. When these procedures are to be carried out aboard a ship, close attention must be paid so that reassembling is carried out correctly. If these procedures cannot be carried out aboard, contact your nearest service agent of Yokogawa Denshikiki Co., Ltd.

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6.2.5 Procedure for Aligning Repeater Compass Indication

The repeater compass indication is automatically aligned with the master compass indication when the power is turned on. In general, no other alignment is required. However, it is advisable to check the master compass display and the repeater compass indication before departing from a port to avoid possible accident. If the master compass display and the repeater compass indication match, alignment of indication is not necessary.

(1) Procedure using the zero adjustment switch

If the repeater compass indication shifts from the master compass display, use the zero adjustment switch to align the indication. Press this switch for 3 seconds or more. The repeater compass card turns and the zero of the compass card is aligned with the pointer to correct the shift. Then, the repeater compass follows up the received value.

(2) Procedure in the case where the zero point photo-sensor fails

If an error due to zero point photo-sensor failure is generated, use the procedure described below to align the indication. When an error is generated, the compass card stops. By pressing the zero adjustment switch with the compass card stopped state, the compass card begins to revolve the high speed (30/s).

When the pointer is near the zero point of the compass card, press the zero adjustment switch. The speed of the turning compass card decreases (0.5/s). At the instant when the pointer aligns with the zero of the compass card, press the zero adjustment switch. The compass card stops turning.

If the zero adjustment switch is not pressed within 5 seconds, the compass follows up the received value. If it is pressed within 5 seconds, the state of the compass changes returns to . *If the switch is not pressed when it is in the turning state of or the compass card stops. If the zero adjustment switch is pressed when it is stopped, the compass goes to state and turns at the high speed.

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6.2.6 Preparation of Supporting Liquid

Approximately 2.4 liters of supporting liquid are used in the master compass unit, and further 3 liters of supporting liquid are provided for spare. Contact Yokogawa for further supplies. Supporting liquid should always be supplied by Yokogawa, but in navoidable circumstances, you may prepare supporting liquid as follows:

Distilled water 1.8L Glycerin 145 mL Benzoic acid 3.2 g

Put the each material in distilled water at the specified rate. Heat the mixture up to 80 to 90 degC until the benzoic acid dissolves in the solution.

Note : If the specific gravity of the prepared liquid deviates from the value shown below, add glycerin or distilled water to make fine adjustment.

Temperature Specific Gravity 15C 1.0230 0.001 20C 1.0220 0.001 25C 1.0208 0.001 30C 1.0193 0.001

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6.3 Functions for Maintenance This section describes the functions used for maintenance. Do not use these functions in normal state. When command codes of 30's in the command functions are to be used, enable the maintenance functions.

Only technicians of the Service department of Yokogawa Denshikiki Co., Ltd. are authorized to implement the operations and other work described in this chapter. However, if for some reason t