Gyrocompass System Description : CMZ-900
A gyrocompass detects the direction of true north by means of a fast-spinning rotor, which is suspended with no friction and is influenced by gravity and rotation of the Earth. A gyrocompass consequently indicates a ship's heading. The ship's heading is transmitted to repeater compasses and other ship's equipment after the signal format is converted to serial data or to stepper or analog signals depending on what type of format the equipment requires.
There are three models in the CMZ900 series:
CMZ900B: Single-unit model, suitable for small vessels
CMZ900S: Single-unit model, suitable for all types of merchant vessels
CMZ900D: Dual-unit model for extra reliability
GYROCOMPASS CMZ-900B series
Features
-
The system configuration can easily be adapted to each vessel's specifications.
-
IEC 61162-2 high-speed code is available for the heading and rate of turn (ROT) outputs.
-
A unique anti-vibration system enhanced by the velocity damping effect of high viscous oil, provides superior damping of vibration and decoupling of shock at sea.
-
A small and lightweight container enhances the follow up speed. The gyrocompass changes smoothly and does not lag when a small vessel rapidly changes course.
-
A space-saving design: the master compass can be installed on the autopilot stand.
-
The restart time can be preset from 1 to 99 hours.
System Configuration of CMZ900B
Explanation of Units (Basic configuration): CMZ900B type
1) Master Compass MKM026
The master compass consists of a control unit, container unit, and anti-vibration mechanism.
A gyrosphere, the key component of north seeking, is suspended in the container unit.
2) C.Operation Unit MKR040 (Optional)
The C.Operation unit receives the ship's speed and position data, and then corrects the speed error of the ship's heading signal.
3) AC Adapter MKR027 (Optional)
Since the master compass works on DC power, an AC adapter is used when AC power is supplied.
Thus, a two-way power supply can be easily achieved if needed.
Specifications
|
Settling Time
and Accuracy |
Settling time |
Within 5 hours
(Operational state is reached in about 2 hours) |
|
Accuracy |
Static: ±0.25 deg.x sec (Latitude)
Dynamic: ±0.75 deg.x sec (Latitude) |
|
Follow up accuracy |
0.1 deg. or less |
|
Max. follow up speed |
30 deg./s |
|
Environmental
(Normal use) |
Permissible angle |
±40 deg.(Roll), ±40 deg. (Pitch) |
|
Ambient temperature |
-10 deg.C to +55 deg.C |
|
Power Supply |
Main |
24V DC
AC adapter (Option), type MKR027 is available on
100V/110V/115V/220V AC 50/60Hz single-phase |
|
Alarm |
24 V DC |
|
Signal Inputs |
External heading |
IEC61162-1 (NMEA0183) |
1 circuit |
|
Options (Available on adding C.Operation unit, type MKR024) |
|
Automatic
speed error correction |
Optional |
|
Latitude |
IEC61162-1 (NMEA0183) |
1 circuit |
|
Ship's speed |
200 P/nm or IEC61162-1 (NMEA0183) |
1 circuit |
|
External heading
(For deviation alarm) |
IEC61162-1 (NMEA0183)
(Supplied to C.Operation unit, MKR024) |
1 circuit |
|
Signal Outputs |
Heading data for repeater compasses |
3 circuits |
|
Heading data for steppers |
1 circuit |
|
Serial data |
IEC61162-1 |
1 circuit |
|
IEC61162-1/-2 selective |
2 circuits |
|
Gyro. running (Close contact when running) |
1 circuit |
|
Alarms (Open contact
when abnormal) |
System failure |
1 circuit |
|
No voltage |
1 circuit |
GYROCOMPASS CMZ-900S series
Features
-
The system configuration can easily be adapted to each vessel's specifications.
-
IEC 61162-2 high-speed code is available for the heading and rate of turn (ROT) outputs.
-
A unique anti-vibration system enhanced by the velocity damping effect of high viscous oil, provides superior damping of vibration and decoupling of shock at sea.
-
A small and lightweight container enhances the follow up speed. The gyrocompass changes smoothly and does not lag when a small vessel rapidly changes course.
-
A space-saving design: the master compass and the control box can be installed on the autopilot stand.
-
Automatic speed error correction is possible if both the ship's speed signal from the speed log and the latitude signal from a GPS or some other positioning device is available. Further, the latitude can be estimated from the ship's speed and the gyrocompass reading if the positioning device signal is absent.
-
An external heading signal from an instrument such as a magnetic compass or a GPS compass can be passed to repeater compasses and other ship equipment for back-up purposes.
-
As a standard function, a built-in monitor detects deviations between the master compass and external sensor heading readings.
-
The restart time can be preset from 1 to 99 hours.
System Configuration of CMZ900S
Explanation of Units (Basic configuration): CMZ900S type
1) Master Compass MKM026
The master compass consists of a control unit, container unit, and anti-vibration mechanism.
A gyrosphere, the key component of north seeking, is suspended in the container unit.
2) Control Box MKC326
The control box consists of a power supply unit, control unit, and computing unit engaged in speed error correction of the ship's heading signal.
The control box amplifies heading signals coming from the master compass.
The amplified heading signals are distributed to repeater compasses and other ship's equipment depending on what type of format the equipment requires.
Specifications
|
Settling Time
and Accuracy |
Settling time |
Within 5 hours
(Operational state is reached in about 2 hours) |
|
Accuracy |
Static: ±0.25 deg.x sec (Latitude)
Dynamic: ±0.75 deg.x sec (Latitude) |
|
Follow up accuracy |
0.1 deg. or less |
|
Max. follow up speed |
30 deg./s |
|
Environmental
(Normal use) |
Permissible angle |
±40 deg.(Roll), ±40 deg. (Pitch) |
|
Ambient temperature |
-10 deg.C to +55 deg.C |
|
Power Supply |
Main |
100V/110V/115V/220V AC 50/60Hz single-phase
24V DC (For back up power) |
|
Alarm |
24 V DC |
|
Signal Inputs |
Automatic
speed error correction |
Latitude: IEC61162-1 (NMEA0183) |
1 circuit |
|
Ship's speed: 200 P/nm or IEC61162-1
(NMEA0183) |
1 circuit |
|
External heading |
IEC61162-1 (NMEA0183) |
1 circuit |
|
Signal Outputs |
Heading data for repeater compasses |
8 circuits |
|
Heading data for steppers |
4 circuits |
|
Serial data |
IEC61162-1 |
1 circuit |
|
IEC61162-1/-2 selective |
2 circuits |
|
Analog heading data |
Heading signal |
1 circuit |
|
Quadrant signal |
1 circuit |
|
Turn rate signal |
3 circuits |
|
Gyro. running (Close contact when running) |
1 circuit |
|
Alarms (Open contact
when abnormal) |
System failure |
1 circuit |
|
Master compass failure |
1 circuit |
|
No voltage |
1 circuit |
|
Heading deviation signal (Close contact when excessive) |
1 circuit |
CMZ-900D Gyrocompass
Specifications
-
The system configuration can easily be adapted to each vessel's specifications.
-
IEC 61162-2 high-speed code is available for the heading and rate of turn (ROT) outputs.
-
A unique anti-vibration system enhanced by the velocity damping effect of high viscous oil, provides superior damping of vibration and decoupling of shock at sea.
-
A small and lightweight container enhances the follow up speed. The gyrocompass changes smoothly and does not lag when a small vessel rapidly changes course.
-
A space-saving design: the master compass and the control box can be installed on the autopilot stand.
-
Automatic speed error correction is possible if both the ship's speed signal from the speed log and the latitude signal from a GPS or some other positioning device is available. Further, the latitude can be estimated from the ship's speed and the gyrocompass reading if the positioning device signal is absent.
-
An external heading signal from an instrument such as a magnetic compass or a GPS compass can be passed to repeater compasses and other ship equipment for back-up purposes.
-
Mechanical switchover as well as switchover by software control, is available to select which master compass can be used for the purpose of reliability on the switch action.
-
As a standard function, a built-in monitor detects deviations between the master compass and external sensor heading readings.
-
The restart time can be preset from 1 to 99 hours.
System Configuration of CMZ900D
Explanation of units (Basic configuration): CMZ900D type
1) Master Compass MKM026
The master compass consists of a control unit, container unit and anti vibration mechanism.
A gyrosphere, key component of north seeking, is suspended in the container unit.
2) Control Box MKC327
The control box receives heading signals from the two master compasses.
By means of a switch function, the selected master compass transmits the heading signals to repeater compasses and other types of ship equipment, and the heading of all repeater compasses will align with the selected master compass heading with just the push of a button.
3) Dual AC Adapter MKS066
The dual AC adapter is capable of simultaneous AC supply to two master compasses. Two way, AC and DC power supply for each master compass can be easily achieved if needed.
Specifications
|
Settling Time
and Accuracy |
Settling time |
Within 5 hours
(Operational state is reached in about 2 hours) |
|
Accuracy |
Static: ±0.25 deg.x sec (Latitude)
Dynamic: ±0.75 deg.x sec (Latitude) |
|
Follow up accuracy |
0.1 deg. or less |
|
Max. follow up speed |
30 deg./s |
|
Environmental
(Normal use) |
Permissible angle |
±40 deg.(Roll), ±40 deg. (Pitch) |
|
Ambient temperature |
-10 deg.C to +55 deg.C |
|
Power Supply |
Main |
100V/110V/115V/220V AC 50/60Hz single-phase
24V DC (For back up power) |
|
Alarm |
24 V DC |
|
Signal Inputs |
Automatic
speed error correction |
Latitude: IEC61162-1 (NMEA0183) |
1 circuit |
|
Ship's speed: 200 P/nm or IEC61162-1
(NMEA0183) |
1 circuit |
|
Alarm |
IEC61162-1 (NMEA0183) |
1 circuit |
|
Signal Outputs |
Heading data for repeater compasses |
8 circuits |
|
Heading data for steppers |
4 circuits |
|
Serial data |
IEC61162-1 |
1 circuit |
|
IEC61162-1/-2 selective |
2 circuits |
|
Analog heading data |
Heading signal |
1 circuit |
|
Quadrant signal |
1 circuit |
|
Turn rate signal |
3 circuits |
|
Gyro. running (Close contact when running) |
No.1/No.2
1 circuit ea. |
|
Alarms (Open contact
when abnormal) |
System failure |
1 circuit |
|
Master compass failure |
No.1/No.2
1 circuit ea. |
|
No voltage |
No.1/No.2
1 circuit ea. |
|
Heading deviation signal (Close contact when excessive) |
1 circuit |
|
