DOPPLER SONAR

INSTALLATION MANUAL
Before You Begin
Symbols Used In This Manual
In this manual, and on the equipment, we use several warning signs to call your
attention to important items that, if not handled correctly, could present danger to
yourself or property. These warning note classifications are as described below.
Please be fully aware of the importance of these items before using this manual.

Indicates warning items that, if ignored,

may result in serious personal injury or
even death.

Indicates cautionary items that, if ignored,

may result in personal injury or physical
damage.

Examples of Related Symbol Marks Used in this Manual and on the Unit

Each △ mark is intended to alert the user to the presence of

precautions including danger and warning items. The picture in
each △ mark alerts you to operations that should be carefully
Electrical shock performed.

Each mark is intended to alert the user to the presence of

prohibited activity. The picture/word in/beside each mark alerts
Prohibits Prohibition you to operations that are prohibited.
disassembly

Each ● mark is intended to alert the user to the presence of

necessary instructions. The picture in each ● mark alerts you
to operations that must be performed.
Unplug Instruction

WARNING LABEL
You can see the warning label on the top of the unit.
Do not attempt to remove the warning label from the unit or impair or modify it.

Before You Begin i

 Usage Hints

Do not remove the cover of this unit. Otherwise, you may

touch a high-voltage part and suffer from an electrical
shock.

Do not touch the radiator fin of the unit. Doing so may

cause a burn by high temperature.

Do not disassemble or modify this unit. Otherwise, a fire,

an electrical shock, or a failure may occur.

Do not place a vessel containing water, etc. or a metallic

object on this unit. When water spills or when water or the
object enters the unit, a fire, an electrical shock, or a failure
may occur.

Do not use this unit at a voltage other than the supply

voltage stated on the unit. Otherwise, a fire, an electrical
shock, or a failure may occur.

Do not insert or remove the power cord or operate switches

with a wet hand. Otherwise, you may suffer from an
electrical shock.

Do not damage or modify the power cord(s). Placing a heavy

object onto, heating, streching or bending the cord May
cause a fire or electrical shock.

Do not preform maintenance on the transducer while the

ship is in the water. Doing so may cause injury or water
leakage to the ship.

In the event that you spill or drop any liquids or metals

etc., turn off the main unit, unplug the power, and contact
your sales agent outlet or one of JRC’s branch offices, sales
centers or liaison offices. Continuing operation as is may
cause a fire, electric shock or malfunction.
In the event that smoking or burning odors are detected,
immediately terminate operation of the unit and contact
your sales agent outlet or one of JRC’s branch offices, sales
centers or liaison offices. Continuing operation as is may
cause a fire or electrical shock. Never attempt to service the
interior of the unit

ii Usage Hints
Contact our service center or agent for any electrical work
or installation of this unit. With the exception of qualified
service personnel, do not attempt to service this unit, as
doing so may cause malfunction.

Do not use or leave this unit is exposed to direct sunlight

for a long time or the temperature rises above 55°C. Doing
so may cause a fire or electrical shock. (Expect Wing
Display)

Do not place the unit on a wobbly stand or any unsteady

foundation. Doing so may cause the unit to fall resulting in
injury or damage.

Do not bring the unit in a cooled state abruptly into a warm

room. A high voltage may leak due to condensation may
result in failure. In this case, use the unit set after leaving
it alone for 30 min.

When installing this set, be sure to connect the grounding

wire to the grounding terminal of the unit. Otherwise, you
may suffer an electrical shock during a failure or leak.

Do not turn on the power switch of the unit while the ship
is on the shore. Otherwise, the transducer may
malfunction.

Do not place the unit against a wall or against anything

tangent to the radiator on the rear side of the unit. Doing
so may cause heat to accumulate, and result in a fire or
malfunction.

When cleaning the surface, do not use any organic solvent

such as thinner or benzine. Otherwise, the painting on the
surface may be damaged.For cleaning the surface, remove
the dust and refuse and wipe with clean dry cloth.

Usage Hints iii

 External View

Wing Display
Main Display

Signal Processor Signal Distributor

Transducer

iv
 Contents
Before You begin …………………………………………………………………………… i
Usage Hints ………………………………………………………………………………… ii
External View………………………………………………………………………………… iv

1. Introduction …………………………………………………………………………….. 1
1.1 Principle of the JLN-550 Doppler Sonar ……………………………………….. 1
1.2 Ground Speed of the Ship …………………………………………………………… 1
1.3 Water Speed of the Ship ……………………………………………………………… 2
1.4 GPS-Based Speed of the Ship ………………………………………………………… 2
1.5 ROT-Based 3-Axial Display of the Ship’s Speed ………………………………… 3
2. Construction …………………………………………………………………………… 4
2.1 Components …………………………………………………………………………… 4
2.2 Configuration ………………………………………………………………………… 5
3. Installation ……………………………………………………………………………... 6
3.1 Installing the Display and Distributor and Processor Unit …………………… 6
3.2 Mounting the Transducer …………………………………………………………… 8
3.3 Connection Diagram …………………………………………………………………. 11
4. Wiring ………………………………………………………………………………………… 12
4.1 Signal Processor Wiring ……………………………………………………………… 12
4.2 Signal Distributor Wiring …………………………………………………………… 13
4.3 Main Display Wiring ………………………………………………………………… 15
4.4 Wing Display Wiring ………………………………………………………………… 16
4.5 Remarks on Connection other Equipment ………………………………………… 17
5. Installation Setting …………………………………………………………………………… 18
5.1 DIP Switch Setting …………………………………………………………………… 18
5.2 Setting Ship’s data ………………………………………………………………… 22
5.3 Menu list ……………………………………………………………………………… 24
6. Installation Checking ………………………………………………………………………… 27
6.1 LED Status …………………………………………………………………………… 27
6.2 Checking Noise Level ………………………………………………………………… 28
6.3 System Check Dummy Signal ……………………………………………………… 29
6.4 Remarks on Master Reset ………………………………………………………… 29
7. Speed test ……………………………………………………………………………………… 30
7.1 Mile Post Running Test ……………………………………………………………… 30
7.2 Measurement Data sheet ……………………………………………………………. 33
8. PCB Unit View ………………………………………………………………………………… 35
8.1 Main Display …………………………………………………………………………… 35
8.2 Wing Display …………………………………………………………………………… 37
8.3 Signal Distributor ……………………………………………………………………… 38
8.4 Signal Processor ………………………………………………………………………… 40
9. Outline &. Setting drawing ………………………………………………………………… 46
9.1 Main Display NWW-60T……………………………………………………………… 46
9.2 Wing Display NWW-61T……………………………………………………………… 47
9.3 Remote Display NWW-62T…………………………………………………………… 48
9.4 Signal Distributor NQA-3012………………………………………………………… 49
9.5 Signal Processor NJC-24……………………………………………………………… 50
9.6 Transducer NKF-770…………………………………………………………………… 51
9.7 Transducer NKF-772…………………………………………………………………… 52

Contents v
1. Introduction
1.1 Principle of the JLN-550 Doppler Sonar
This product transmits ultrasound waves obliquely into the sea water and receives the water echo
reflections from the plankton and other suspended solids in the water and the ground echo reflections
from the seabed.
V: Ship's speed

θ: Angle of dip

Water echo reflections Plankton and suspended solids

Ground echo reflections Seabed

The signal receiving frequency, "f1", is determined by the amount of doppler shifting of the
transmitting frequency, "f0", according to the particular speed of the ship.

2 × f 0 × V × cos θ
f1 = f 0 + C: Sound velocity (1,500 m/S)
C

The ship's speed, V, can therefore be inversely calculated by measuring the receiving frequency, "f1".

1.2 Ground Speed of the Ship

The ground reflection signal is used for measuring the ground speed.
During actual operation, ultrasound beams are emitted in four directions with an offset of 45
degrees from the bow.
As shown in the diagram below, four channel numbers are defined as c to f for convenience's
sake.

e 45° c

Angle of dip
60°

d f

The water depth and the ground speed of the ship (BT) are computed from the received signals of
the seabed reflections in the four directions.

1. Introduction 1
1.3 Water Speed of the Ship
The water reflection signal is used for measuring the speed through the water.
During actual operation, ultrasound beams are emitted in two directions on the line from the bow
to the stern.
As shown in the diagram below, two channel numbers are defined as g and h for convenience's
sake.

Angle of dip
75°

The water speed of the ship (WT) is computed from the received signals of the log reflections in
the two directions.

1.4 GPS-Based Speed of the Ship

The fore/aft speed and port/starboard speed of the ship can be calculated by entering the course
and ship's speed indicated by the GPS, and the bow heading indicated by the gyro.

N Bow heading
Fore/aft speed

GPS-based speed

Port/starboard speed

Necessary sentence for GPS-Based Speed display

IEC61162_1:2000 NMEA0183 Ver.2.3 or more
GPS : $GPRMC, or $GPVTG,
GYRO : $**HDT, or $**HDG,

2 1. Introduction
1.5 ROT-Based 3-Axial Display of the Ship's Speed
The 3-axial port/starboard speed of the ship can be calculated from the previously specified
installation positions of the transducer and the GPS antenna and the desired BOW and STERN
display positions by entering the ROT-based angular velocity.

GPS antenna TD
BOW display position STERN display position DB
TG
DS FP BOW speed display
DB
Transducer
Transducer
TD TG
DS
(Lpp) GPS

STERN speed
FP AP
display

Set four points (TD, TG, DB, and DS) at any positions on an extension line from point FP.
When the ship's speed, BT, is valid, the 3-axial port/starboard speed of the ship will be computed.
In GPS display mode, the GPS-based 3-axial port/starboard speed of the ship can also be
displayed.
(There is no need to set the position of ROT.)

Necessary sentence for ROT-Based 3-Axial display

IEC61162_1:2000 NMEA0183 Ver.2.3 or more
ROT : $TIROT, or $HNROT, or $**ROT,

However, $GPROT is disregarded.

1. Introduction 3
2. Construction
2.1 Components
The standard equipment and options are shown in the tables below.

Standard Equipment
Description Model No. QTY MASS Remarks
MAIN DISPLAY NWW-60DA 1 2kg DA: 2 axis/Wall mount type
-60DB DB: 2 axis/Flush mount type
-60TA TA: 3 axis/Wall mount type
-60TB TB: 3 axis/Flush mount type
Select one.
SIGNAL DISTRIBUTOR NQA-3012 1 10kg

SIGNAL PROCESSOR NJC-24 1 15kg

TRANSDUCER NKF-770 1 120kg Flush mount type

With cable 40m
SPAIR PARTS 7ZXBS0018 1

INSTRUCTION MANUAL 7ZPBS2802

Options
Description Model No. QTY MASS Remarks
WING DISPLAY NWW-61D 2 5kg D: 2 axis type
-61T T: 3 axis type Select one.
REMOTE DISPLAY NWW-62D 1 1.3kg D: 2 axis / T: 3 axis type
-62T *A: Wall / *B: Flush mount
REMOTE DISPLAY NWW-5 1 1-axis, Flush mount type
DISTANCE COUNTER NWW-7 1 Flush mount type
REMOTE DISPLAY NWW-16 1 1-axis + Distance
ANALOG DISPLAY NWW-24xxxxx 2max 6.5kg flush mount type
ANALOG DISPLAY NWW-25xxxxx 7kg wall mount type
ANALOG DISPLAY NWW-26xxxxx 2.5kg small flush mount type
REMOTE DISPLAY NWW-49A 1 2.5kg A: Wall mount type
-49B B: Flush mount type
DIMMER UNIT NCM-227 1 For Main Display
DIMMER UNIT NCM-329H 1 For Analog Display
DIMMER UNIT NCM-506 1 For NWW-49 Display
JUNCTION BOX NQD-4345 1 Between NJC- and NQA-
GYRO SENSOR NJZ-1080 1 3kg
OPERATOR UNIT NWZ-120GA 1 3.5kg GA: Wall mount type Select
-120GB GB: Flush mount type one
RECTIFIER NBA-3263 1 8Kg For OPERATOR UNIT
TRANSDUCER NKF-770W 1 Flush mount type
With cable 40m
TRANSDUCER NKF-772 1 Gate Valve type
With cable 40m

4 2. Construction
2.2 System Configuration

2. Construction 5
3. Installation
3.1 Installing the Display and Distributor and Processor Unit

Mounting Location
As the signal cable may receiver or generate noise, install the in a place
that is free of interference.

Do not install the unit near DSB devices, amateur radio or their coaxial
cables.

Install it in a place that is more than 1.2 meters from equipment that
generates a strong magnetic field (for example, radar magnetron or
speakers) and magnetic compasses.

Install it in a place where it will not be in direct sunlight (expect Wing

Display) or hit by spray from waves or hot air exhaust.
Mounting Procedure
200
(1) Main Display
NWW-60

220
Panel cut out
186 x 308mm

Mounting hole
4-φ8 or M6
Cable inlet
(2) Wing Display
NWW-61 50 225 50
Maintenance
space
200 50

160 231

3. Installation 10

4-φ10 or M8
200
Cable inlet

6 3. Installation
(3) Signal Distributor
NQA-3012

50 480 50
Maintenance
space
420 50

584
604

200
4-φ10 or M8 Cable inlet

(4) Signal Processor

NJC-24

50 440 50
Maintenance
space
406 50

500
350

200
4-φ10 or M8 Cable inlet

3. Installation 7
3.2 Mounting the Transducer

Mounting Location
The ultra sound waves that are used to measure ship speed can not make
correct measurements if air bubbles are present effecting the transfer of
sound waves. It is necessary to avoid the source of bubbles and the
stream of bubbles when selecting a position to mount the transducer.
We recommend consulting with the manufacturers of the boat, as information
about the actual situation for boats with a similar hull structure is important
when selecting a position to mount the device.
Refer to the following basic explanation about bubbles.

1. Conditions of the source and flow of bubbles

Fig 3-5 shows a conceptual drawing of the condition of the source and flow
of bubbles near the hull, however there are complex differences due to such
conditions as the hull shape, ship speed and draft.

Side view

Bottom view

Cross section of hull

Fig. 3-5

2. Relation between hull shape and bubbles

The following is a representational example of the conditions of the source
and flow of bubbles along the bottom of a boat, such conditions as the hull shape,
ship speed and draft create various characteristics.
2.1 For hulls that have a deep draft
There is a small amount of bubbles along the bottom of a boat with a deep
draft, which allows a wide tolerance for a transducer mounting position.

Water line

Deep daft

Fig. 3-6

8 3. Installation
2.2 For high-speed hulls with a cut-away stern
Boats with a cut-away stern for high speeds, and high horsepower
forward-mounted engines, have increased propeller noise due to high RPM,
which tends to distribute bubbles toward the center of the hull. This allows
only a narrow tolerance for the transducer mounting position.
Engine

Fig. 3-7

2.3 For hulls that are broad of beam in the bow or amidships
Due to poor lateral dispersion of bubbles along the bottom of the boat, the
thickness of bubbles may reach or exceed 200 mm (100 to 150 mm is
considered normal for other hulls). Therefore, it is often necessary to
increase the extension from the hull more than is usual.

Cross section of hull

Narrow beam hull

Broad beam hull

Fig. 3-8

2.4 For hulls that have a ball type bow keel

For this kind of high-speed hull design, bubbles are distributed widely
along the bow and amidships of the hull. While it looks like a ball shape,
that is not always the case, it needs to be checked, and if so the tolerance
for the transducer mounting position increases.

This area produces

few bubbles.

Fig. 3-9

3. Installation 9
 2.5 For hulls that have narrowed bow or stern outboard
For high-speed FRP boats, the engine horsepower has been increased to
increase the speed, the following cautions should be taken.
a) There is a large flow of bubbles along the bottom of the boat due
to the shape of the keel, and the shape of the bow.
b) For many boats that have a cut-away stern the engine has been
moved forward, which increases the noise from the propeller.
c) If the engine is oversized for the hull, the high RPM
(2000 to 3000 rpm) increase the vibration noise in the hull.

For these reasons the correct placement of the transducer on this

type of hull is extremely difficult, refer to the mounting position on
boats in which the operation of the transducer is good for particularly
for the same hull shape and the same area.

10 3. Installation
 3.3
Connection Diagram

Red
Org
Blu /blk
Blk /wht
Grn /blk
Org /blk

3.
Wht
TRANSDUCER CABLE (JRC)
Blk
Blu /wht
Blk /red
Grn /wht
Red /wht
Wht /blk
Red /blk

Installation
Blu
Grn

11
Copper Plate
4. Wiring
4.1 Signal Processor (NJC-24) Wiring

TB3 TB2

3 4 1011 8 9 1 2 14 151213 6 7 5 16
「 「「「8 「「「
「

Cable color TB3

Copper plate
3:RED ①

4:ORG ②
To Transducer To Signal Distributor
10:BLU/BLK ③
To GND
11:BLK/WHT ④

8:GRN/BLK ⑤
4.1.1 Trnasducer Cable (CFQ-6981-40)
9:ORG/BLK ⑥

100mm 150mm 12mm 1:WHT ⑦

2:BLK ⑧

14:BLU/WHT ⑨

15:BLK/RED ⑩

12:GRN/WHT ⑪

13:RED/WHT ⑫

6:WHT/BLK ⑬

7:RED/BLK ⑭

5:BLU ⑮

16:GRN ⑯

4.1.2 Cable between Signal Processor and Signal Distributor (250V-TTYC-7S)

150mm 200mm 12mm

100mm 100mm
12 4. Wiring
4.1.3 Jumper Cable for ship’s Main Voltage

SHIP’S MAIN

1
TB11

4 3 2
100V

POWER_SUPPLY

4 3 2 1

1
TB11

TB11
110/115V

CBD-1637

4 3 2
1
220/230V

TB11

4 3 2
4.2 Signal Distributor(NQA-3012) Wiring

TB 3 TB 4

TB 500

Copper plate

or wire
To Ship’s Main To Main Display To Signal Processor

To GND

4. Wiring 13
4.2.1 Cable between Signal distributor and Ship’s Main (0.6/1KV-DPYC1.5)

50mm 100mm

4.2.2 Cable between Signal Distributor and Signal Processor (250V-TTYC-7S)

50mm 100mm 12mm

100mm

4.2.3 Cable between Signal Distributor and Main Display (250V-TTYC-7S)

50mm 100mm 12mm

100mm

4.2.4 Cable between Signal Distributor and Wing Display (250V-TTYC-4S)

50mm 250mm 12mm

100mm

14 4. Wiring
4.3 Main Display(NWW-60) Wiring

TB1

1 2 3 4 5 6 7 8 9 10 111213141516

To Signal Distributor

4.3.1 Cable between Signal Distributor and Main Display (250V-TTYC-7S)

50mm 80mm 7mm

50mm

4. Wiring 15
4.4 Wing Display(NWW-61) Wiring ----(option)

TBS2
4321
4321
TB2

To Signal Distributor

4.4.1 Cable between Wing Display and Signal Distributor (250V-TTYC-4S)

70mm 150mm 7mm

50mm

16 4. Wiring
4.5 Remarks on Connection other Equipment
4.5.1 LOG signal Output (LOG1…LOG8)

Vceo： 30Vmax
200 pulse / nm
Ic ：50mAmax

4.5.2 LOG Pulse Output (LOG)

200 pulse / nm
V：30Vmax

I ：1Amax

4.5.3 NMEA Output (NMEA1…NMEA5)

IEC61162_1:2000

NMEA0183 Ver.1.5 or Ver.2.3

Choose version by setting menu

VBW，VLW，DPT，DBT

4.5.4 NMEA Input (NMEA IN1, NMEA IN3, ROT IN)

IEC61162_1:2000

●
NMEA0183 Ver.2.3 or more

●
RMC, HDT, ROT

4.5.5 Ship Speed Output (ANALOG1, ANALOG2)

+12V

● ● -2VDC to +10VDC

-12V

4.5.6 Distance Run Signal Output (DIST)

+35V

V：35Vmax
100 pulse / nm
I ：0.1Amax

4. Wiring 17
5. Installation Setting
5.1 DIP Switch Setting
Check and if necessary change the DIP switch settings depending on the
external equipment connected.

5.1.1 Main Display NWW-60

Board DIP SW. Setting Contents Remarks
CDJ-2154 ① ON DIMMER mode OFF: Manual ON: Auto
S600 ② OFF EXT. DIMMER OFF: Internal ON: External
③ OFF EXT. Resistance OFF:1kΩ ON: 10kΩ
④ OFF Main/Wing Selection OFF: Main ON: Wing
⑤ OFF (ON) 2-axis/3-axis Selection OFF: 2-axis ON: 3-axis
⑥ OFF Lamp Test OFF: Normal ON: Test
⑦ OFF OFF: Normal ON: Write
⑧ OFF Program Write
① OFF Main/Slave mode OFF: Main ON: Slave
S601 ② OFF (Internal use) Do not disturb the setting
③ OFF GPS display OFF: Normal ON: skip
④ OFF (not use) ------

5.1.2 Wing Display NWW-61 ----(option)

Board DIP SW. Setting Contents Remarks
CDJ-2154 ① ON DIMMER mode OFF: Manual ON: Auto
S600 ② OFF EXT. DIMMER OFF: Internal ON: External
③ OFF EXT. Resistance OFF:1kΩ ON: 10kΩ
④ ON Main/Wing Selection OFF: Main ON: Wing
⑤ OFF (ON) 2-axis/3-axis Selection OFF: 2-axis ON: 3-axis
⑥ OFF Lamp Test OFF: Normal ON: Test
⑦ OFF OFF: Normal ON: Write
⑧ OFF Program Write
① OFF (Internal use) Do not disturb the setting
S601 ② OFF (Internal use) Do not disturb the setting
③ OFF (Internal use) Do not disturb the setting
④ OFF (not use) ------

5.1.3 Remote Display NWW-62 ----(option)

Board DIP SW. Setting Contents Remarks
CDJ-2154 ① ON DIMMER mode OFF: Manual ON: Auto
S600 ② OFF EXT. DIMMER OFF: Internal ON: External
③ OFF EXT. Resistance OFF:1kΩ ON: 10kΩ
④ OFF Main/Wing Selection OFF: Main ON: Wing
⑤ OFF (ON) 2-axis/3-axis Selection OFF: 2-axis ON: 3-axis
⑥ OFF Lamp Test OFF: Normal ON: Test
⑦ OFF OFF: Normal ON: Write
⑧ OFF Program Write
① ON Main/Slave mode OFF: Main ON: Slave
S601 ② OFF (Internal use) Do not disturb the setting
③ OFF (Internal use) Do not disturb the setting
④ OFF (not use) ------

18 5. Installation Setting
5.1.4 Signal Distributor NQA-3012
Board DIP SW. Setting Contents Remarks
① OFF Not used
CDJ-2155 S510 ② OFF Not used
③ OFF Not used
④ OFF Not used
⑤ OFF Not used
⑥ OFF Not used
⑦ OFF OFF: Normal ON: Write
Program Write
⑧ OFF
① OFF Not used
S511 ② OFF Not used
To ③ OFF Not used
S514 ④ OFF Not used
⑤ OFF Not used
⑥ OFF Not used
⑦ OFF Not used
⑧ OFF Not used

5.1.5 Signal Processor NJC-24

Board DIP SW. Setting Contents Remarks
① OFF OFF: Normal ON: Program mode
Program Write
CDC-1189 S1 ② OFF
③ OFF Not used
④ OFF Not used
① OFF Trigger In 1 ON: ↓Minus edge
CDE-1011 S100 ② OFF Trigger In 2 OFF:↑Plus edge
③ OFF Not used
④ OFF Not used
⑤ OFF Not used
⑥ OFF Not used
⑦ OFF Not used
⑧ OFF Not used
① OFF Vol. No. OFF: Normal ON: Vol. No.
S101 ② OFF Not used
③ OFF Not used
④ OFF Not used
⑤ OFF Not used
⑥ OFF Not used
⑦ OFF Not used
⑧ OFF Not used
① OFF Not used
S102 ② OFF Not used
③ OFF Not used
④ OFF Not used
⑤ OFF Not used
⑥ OFF Not used
⑦ OFF THL OFF: Normal ON: RV103 Adj.
⑧ OFF Internal use Do not disturb the setting

5. Installation Setting 19
 Board DIP SW. Setting Contents Remarks
① OFF Internal use Do not disturb the setting
CDE-1011 S103 ② OFF Internal use Do not disturb the setting
③ OFF Internal use Do not disturb the setting
④ OFF Internal use Do not disturb the setting
⑤ OFF Internal use Do not disturb the setting
⑥ OFF Internal use Do not disturb the setting
⑦ OFF Internal use Do not disturb the setting
⑧ OFF Internal use Do not disturb the setting
① Monitor (OFF: 0 ON: 1)
S104 ② 0000: Internal reference time (1/10 of a second)
1000: Quantity of 240kHz data sampling [Samplings]
③ 0100: Quantity of 2MHz data sampling [Samplings]
④ 1100: Number of tidal-current measuring layers [Layers]
0010: Calculation mode
1010: Distance "Odd" [nm]
0110: Distance "Trip" [nm]
1110: Depth [m]
0001: 240kHz fore/aft WT speed [kts]
1001: 240kHz port/starboard WT speed [kts]
0101: 240kHz fore/aft BT speed [kts]
1101: 240kHz port/starboard BT speed [kts]
0011: 2MHz fore/aft WT speed [kts]
1011: 5V voltage [V]
0111: Internal temperature [ ℃]
1111: Not used

⑤ OFF Internal use Do not disturb the setting

⑥ OFF Internal use Do not disturb the setting
⑦ OFF Internal use Do not disturb the setting
⑧ OFF Internal use Do not disturb the setting

20 5. Installation Setting
5.1.6 Operator Unit NWZ-120G / Gyro Sensor NJZ-1080
Unit SW No. Jumper
NWZ-120G B2 1―2 Jumper Scale internal indicator : ±30deg.
3―4 None
5―6 None Polarity internal indicator : normal
7―8 Jumper Measuring range external equipment : ±30deg.
9―10 None
11―12 Jumper
13―14 None
15―16 Jumper Polarity external equipment : normal
B13 1―2 None Polarity serial interface : normal
3―4 None NMEA refresh : 1 sec.
5―6 None Not used
7―8 Jumper Damp 2 : 5 sec.
9―10 None Not used
B15 1 Off Factor of multiplication : 1.00
2 On
3 Off
4 On
5 Off
6 Off Not used
7 Off
8 Off
B20 1―2―3 1―2 Jumper Gyro fault alarm contact : Break contact
NJZ-1080 R23 (Gain) Don’t turn．
R30 Offset Turn so that NMEA data may become zero.

NWZ-120G
B15
OFF
ON
12345678

B13
1 2
3 4
5 6
7 8
9 10

15 13 11 9 7 5 3 1 3 2 1
B2 B20
16 14 12 10 8 6 4 2

NJZ-1080
L1 R30 R23
Offset

5. Installation Setting 21
5.2 Setting Ship’s data

Set the data measured on the ship drawing with the length between
perpendiculars (Lpp).

GPS Antenna

DPs DPb
AP FP
TG
DS
DB

DPb: The point of speed display at Bow

Transducer
DPs: The point of speed display at Stern

TD: Distance between FP and the Transducer

TD
TG: Distance between FP and The GPS antenna
(Lpp)
DB: Distance between FP and DPb

DS: Distance between FP and DPs

Lpp: The length between perpendiculars

5.2.1 Setting Menu Switch(NQA-3012)

Changing the data setting of the menu item

S523

S521

Down Up
S524

S522

Changing the digit position in the setting

S525

Returning the hierarchical level of the menu

S523

S521

Esc
S54

S52
S528

S527

S526

Undoing the data settings

S55

UnDo Enter
S52８

S527

S526

Not used ＣＤＪ－２１５５

Opening the menu

Determining the data settings of the menu

22 5. Installation Setting
5.2.2 Setting Procedure
First, display the menu by pressing the Enter key.
The monitoring LED display panel will display "M100-*****".
Note on "M": The alphabet M on the monitoring LED display panel is
actually displayed as " ".
The other characters that cannot be represented on the monitoring
LED display panel are displayed in dummy form.
The " " section in the above display denotes blinking.
Note: Display changes according to circumstances.

Character Code

Character A B C D E F G H I J K L M N O P Q R S

Display

Character T U V W X Y Z 0 1 2 3 4 5 6 7 8 9 - .

Display

5.2.3 For instance to Set the distance between FP and transducer.(M30D)

Operations Display after the operations

Enter “M1oo-*****”
Up Up Enter “M310-*****”
Down Down Down Down Enter “ TD-010.0”

The section in the above display denotes blinking.

To assign "27m" to the value of TD, proceed as follows after

the above operations:

Operations Display after the operations

→ Up “ TD-020.0”
→ Down Down Down Enter “ TD-027.0”

To exit the menu, press the Esc (escape) key four times in succession.

Esc Esc Esc Esc

5. Installation Setting 23
 Similarly, set the major ship’s data (menu mode) as follows:
Clearing all settings (M600)
Transducer Angle Correction (M302)
Ground speed correction (M303)
Water speed correction (M304)
Distance between FP and Transducer (M30D)
Distance between FP and GPS antenna (M30E)
Distance between FP and the point of speed display at BOW (M30F)
Distance between FP and the point of speed display at Stern (M310)
The full-scale value for analog display meter (M462)
Saving all data settings (M500) ---- Very Important !
5.3 Menu list
• Menu list
No. Menu No. Item Default Description
1 M111 20
2 M112 15
3 M113 2.0
4 M114 2
5 M115 0.01
6 M116 Ground speed filter 6 120
7 M117 Ship Speed filter 10 Set the time constant for the primary filter which is to be
used to compute the ship's speed.
Effective value: MIN = 0, MAX = 60
8 M121 20
9 M122 10
10 M123 5
11 M124 5
12 M125 0.94
13 M126 60
14 M127 60
15 M131 100
16 M132 25
17 M133 1.5
18 M134 5
19 M135 0.94
20 M136 Water speed filter 6 120
21 M21o 2.0
22 M22o 0.5
23 M23o 3.0
24 M24o 0.2
25 M301 Draft setting 0.0 Used for statements concerning the water depth during
Draft [m] NMEA output.
26 M302 Transducer angle 0.0 This function adjusts the installation angle of the
correction transducer.
Direc [°] (Enter 350 for 10-degree counterclockwise correction.)
27 M303 Ground speed 100 This function adjusts the ground speed of the ship.
correction (Enter 110 for a 10% increase.)
SpdF1 [%]
28 M304 Water speed 100 This function adjusts the Water speed of the ship.
correction (Enter 90 for a 10% decrease.)
SpdF2 [%]

24 5. Installation Setting
29 M305 Maximum 250 Set the maximum depth for tracking the seabed.
measuring depth Note: For normal operating conditions, do not disturb the
setting setting of "**".
Max.Dept [m]
30 M306 1000
31 M307 100
32 M308 32
33 M309 20
34 M30A 2.5
35 M30B 3
36 M30C 0
37 M30D Transducer position 10 Distance from FP to the transducer
TD [m]
38 M30E GPS antenna 190 Distance from FP to the GPS antenna
position
TG [m]
39 M30F BOW speed display 0 Distance from FP to the BOW port/starboard speed
position display position
DB [m]
40 M310 STERN speed 200 Distance from FP to the STERN port/starboard speed
display position display position
DS [m]
41 M422 NMEA A 2.3 Set the version number for CH-A output.
Ch.A OutPut Ver. NMEA 1 to 2
Ver. 1.5 or 2.3
42 M432 NMEA B 2.3 Set the version number for CH-B output.
Ch.B OutPut Ver. NMEA 3 to 5
Ver. 1.5 or 2.3
43 M453 Pulse A 2 Set the CH-A output pulse rate.
Ch.A Pulse Count LOG 1 to 4
Unit: [× 100 pulse/nm]
44 M456 Pulse B 2 Set the CH-B output pulse rate.
Ch.B Pulse Count LOG 5 to 8
Unit: [× 100 pulse/nm]
45 M459 Pulse C 0 Set the CH-C output pulse rate.
Ch.C Pulse Count Relay output
Unit: [× 100 pulse/nm]
46 M462 Analog scale 30 Set the full-scale value for analog output.
Unit: [kts]
47 M47o VBW OKGPS Set the VBW sentence for GPS mode.
OKGPS (GPS speed output) or
NOGPS (Doppler speed output)

5. Installation Setting 25
48 M5oo Saving all data ⎯⎯ This function saves in the internal EEPROM all the
settings data that has been set in each menu mode.
Before this function is performed, if power is turned off
(RESET operations included), existing data settings will
be invalid, and next time the power switch is turned on,
the settings saved in the EEPROM will be valid.
49 M6oo Clearing all settings ⎯⎯ This function resets all menu settings to the respective
defaults and saves the defaults once again.
When this function is performed, the defaults will be
valid for both the data distributor and the signal
processor.
50 M7oo Setting dummy 18 This function generates dummy output of the ship's
output speed, whether it be the log or ground speed, the water
depth, the total distance, and sectional distances.
Once the system has entered this menu mode,
transmission from the signal processor will also be
stopped.
Note: During the display of the total distance and
sectional distances, a dummy output log speed of 18 kts
is added to the current value and saved.
-10 to +40kts :can be changed using the Up/Down keys
M8oo Setting monitor ⎯⎯ This function makes a monitor display of the ship's
display speed, whether it be the log or ground speed, the water
depth, the total distance ("Odd"), and sectional
distances ("Trip").
Once the system has entered this menu mode, the
following items can be displayed using the Up/Down
keys:
51 DPT [m] *** Depth
52 Odd [nm] *** Total distance
53 Trip [nm] *** Sectional distance
54 FV1 [kts] *** 240-kHz fore/aft ground speed of the ship
55 PV1 [kts] *** 240-kHz port/starboard ground speed of the ship
56 SV1 [kts] *** 240-kHz port/starboard ground speed corresponding to
the 3- axis
57 FW1 [kts] ***
58 PW1 [kts] ***
59 SW1 [kts] ***
60 FW2 [kts] *** 2-MHz fore/aft water speed of the ship
61 FV3 [kts] *** GPS-based fore/aft speed
62 PV3 [kts] *** GPS-based port/starboard speed
63 SV3 [kts] *** GPS-based port/starboard speed corresponding to the 3-
axis
64 GSP [kts] *** GPS speed of the ship
65 COG [deg] *** GPS course
66 HED [deg] *** Heading
67 LAT [min] *** Latitude: *****.** min
68 LON [min] *** Longitude: *****.** min
69 ROT [deg/min] *** Angular velocity
70 VOL *** Volume No. of the Soft-ware Ver0.22-3D

26 5. Installation Setting
6. Installation Checking
6.1 LED Status

6.1.1 Main display NWW-60

Board Parts States Description
CDJ-2154 CD607 Blink Receiving data from Signal Distributor

6.1.2 Signal Distributor NQA-3012

Board Parts States Description
CDJ-2155 CD561_1 Blink Receiving data from Main Display
CD561_2 Blink Receiving Tx Gate
CD561_3 Blink Receiving data from Signal Processor
CD541_1 Blink Receiving NMEA1_IN data
CD541_2 Blink Receiving NMEA2_IN data
CD541_3 Blink Receiving NMEA3_IN data
CD541_4 Blink Receiving NMEA4_IN data
CD541_5 Blink Receiving AUX_IN data
CD541_6 Blink Receiving ROT_IN data
CD541_7 Blink Receiving TRIG_1 data
CD541_8 Not Lit Reserved
CD545 Not Lit Reserved

6.1.3 Signal Processor NJC-24

Board Parts States Description
CDC-1189 CD55 Not Lit 240kHz transmission error
CD56 Not Lit 2MHz transmission error
CDE-1011 CD101 Blink Sending RS-232C data
CD102 Not Lit Receiving RS-232C data
CD103 Blink Sending processor data
CD104 Blink Receiving parameter data
CD110 Blink TRIG_1 Reduce gate
CD111 Blink TRIG_2 Reduce gate
CMB-319 CD200 Lit +B140V
CD224 Blink 240kHz transmission
CMA-832 CD311 Lit +15V
CD312 Lit +8V
CD313 Lit -15V
CD314 Lit +5V
CMN-633 CD401 Lit +15V
CD402 Lit +8V
CD403 Lit +5V
CD404 Lit +B30V
CD426 Blink 2MHz transmission
CBD- CD41 Lit +B140V
1637 CD42 Lit +5V
CD43 Lit +15V
CD44 Lit -15V
CD45 Lit +B30V
CD46 Lit +150V

6. Installation Checking 27
6.2 Checking Noise Level
Once take out the fuse F400 from the CMN-633C(2M_TRX_UNIT) and
disconnect the connector J2 from the CDC-1189A(Main Board) to de-energize
the transmitter. Then, measure the noise level in the receiver.

Checking Noise Level at BT

Connect an oscilloscope to the test point TP303-1 (EV1) of the CMA-832
(240k_RX_UNIT) to check the waveform. It has in usual, a noise of less than
0.5VDC.
Trigger signal is the test point TP8 (TXG1) of the CDC-1189A(MAIN BOARD).
If this waveform is pulsating, it may involve much external noise. Recheck all
connections and shields.
Similarly, check the waveform to the test point TP303-2 (EV2), TP303-3 (EV3)
and TP303-4 (EV4).
CMA-832
1V/div. Bottom=13m
TP303-1
10mS/div. TP303-2
TP303-3
TP303-4
1000mS
2~20mS Threshold
TP8 TP106

500mS 100mS
2 or 4mS Noise TP8
TP9
≤0.5V TX

Checking Noise Level at WT

Connect an oscilloscope to the test point TP452 (Fore_Ampl) of the CMN-633
(2M_TRX_UNIT) to check the waveform. It has in usual, a noise of less than
1.0VDC.
Trigger signal is the test point TP9 (TXG2) of the CDC-1189A(MAIN BOARD).
Similarly, check the waveform to the test point TP454 (Aft_Ampl).
CMN-633C
0.5V/div.

4mS/div.
Bottom=13m
TP452
TP454
(Undefined)

Noise
≤1V
TP9
TX

28 6. Installation Checking
6.3 System Check by Dummy Signal
Dummy signals are available to facilitate the confirmation of signals to
external equipment.
This function generates dummy output of the ship's speed, it is both water
speed and ground speed, the water depth, the total distance, and trip
distances.
Check the external equipment to receive data correctly.
Once the system has entered this menu mode (M7oo), transmission from the
signal processor will also be stopped.
Default value on dummy signals as:
Water Speed: fore 18.00 kts
Ground Speed: fore 18.00 kts,
Bow-port 1.80kts, Stern-stb. 1.80kts
Note: During the display of the total distance and trip distances, a dummy
output water speed of 18 kts is added to the current value and saved.

6.4 Remarks on Master Reset: menu mode (M600)

If necessary, use this function to master reset the settings to their initial
state.
When this function is performed, the defaults will be valid for both the
SIGNAL DISTRIBUTOR and the SIGNAL PROCESSOR.

6. Installation Checking 29
7. Speed test
After installation, the indicated speed must be calibrated in comparison with
corresponding true speed to make the best use of the excellent features of this
Doppler Sonar and effectively utilize it.
For the speed calibration, in usual, the ship is run between Mile Post to obtain a
calibrated value from the turnaround time. Measured values in this time must be
accurately recorded on a Doppler Sonar speed test sheet and it must be stored.
If the equipment faults some other day and the circuit board are replaced, this
record will serve for accurate adjustment.

7.1 Mile Post Running Test

Before running between the Mile Post, the ship must be provisionally run enough to
reduce the speed variation during passing between the posts, as possible. In addition
the ship must be also sailed correctly in directions indicated by the Mile Post. When
the effects of both ocean current and wind can be regarded to be constant in time
during test, the ship may go and return once for measurement. When these effects
are, however, considered to very in time, it preferably goes and returns two times. If
the difference between measured values in the same direction exceeds 0.5 knot, the
measurement must be repeated.
7.1.1
For the Mile Post running test, the ship usually goes and returns four times at 1/4,
2/4, 3/4 and 4/4 of the main engine’s rating.
7.1.2
The rotation frequency of the propellers and course should be made constant at a
point, at least, one nautical mile away from the first Mile Post, before entering the
test area, and kept constant until the test ends.
7.1.3
The instant ship passes by Point A of Figure 7.1, depress both a stopwatch 1 and
reset button of the Main Display of this equipment.
7.1.4
The instant the distance counter indicates a reading of 0.01 NM, depress another
stopwatch 2.
7.1.5
The instant the ship passes by point B, again depress the stopwatch 1 to find a time
t1 required for running between the two points, the Mile Post.
7.1.6
The instant the distance counter indicates a value of 1.01 NM, depress the
stopwatch 2 to obtain a time t2 required for running 1.00 NM of the Doppler Sonar.
Note: Steps 7.1.5 and 7.1.6 may be reversed in time.

30 7. Speed Test
7.1.7
Calculate the true and log speeds from above measured times, according to the
following equations.

3600
True speed = a ( knots )
t1

3600
Log speed = 1 ( knots )
t2

Where, a: Distance between the Mile Post in nautical mile.

t: Required time in second.

7.1.8
Run the ship over a different zone of the test area of sea in every measurement.
When entering a return zone after passing a go-zone, the ship should go a long way
round so as to keep the speed and course constant.
Measure in the same manner as on the go-zone.

Posts Posts

A point B point

B point A point

Figure 7.1 Mile Post Running Test

Log speed – True speed

M304 = ( 1 ) ×　100 [%]
True speed

Where, M304 is the correction value of the Water speed .

7. Speed Test 31
 MEASUREMENT DATA OF SPEED LOG

Ship’s Name: Date: Ship’s Officer:

SPEED LOG Model: JLN-550 Serial No. Engineer in charge:

Speed calibration Location: Sea condition: Draft Fore:

Correction value after calibration: % Mid:
Aft:
Run Load of RPM of Distance Time Speed Average Speed Error Ship’s Wind Remarks
No. Main Pro- True Log True Log True Log True Log Course (Correction
Engine peller nm nm sec sec kts kts kts kts kts % True Value)
8. PCB Unit View
8.1 Main Display
8.1.1 Display Control unit CDJ-2154

8. PCB Unit View 35

8.1.2 Display unit CDE-1212

36 8. PCB Unit View

8.2 Wing Display
8.2.1 Display unit CDE-1014

8. PCB Unit View 37

 8.3 Signal Distributor
8.3.1 Terminal Board CQD-1917

38 8. PCB Unit View

8.3.2 Data Processor unit CDJ-2155

8. PCB Unit View 39

8.4 Signal Processor
8.4.1 Main Board CDC-1189A

40 8. PCB Unit View

8.4.2 Monitor unit CDE-1011

8. PCB Unit View 41

 8.4.3 240k TX unit CMB-319

42 8. PCB Unit View

8.4.4 240k RX unit CMA-832

8. PCB Unit View 43

8.4.5 2M TRX unit CMN-633C

44 8. PCB Unit View

8.4.6 Power Supply unit CBD-1637

8. PCB Unit View 45

 9. Outline &. Setting drawing
9.1 Main Display NWW-60TB

46 9. Outline &. Setting drawing

9.2 Wing Display NWW-61T

9. Outline &. Setting drawing 47

9.3 Remote Display NWW-62TB

48 9. Outline &. Setting drawing

9.4 Signal Distributor NQA-3012

9. Outline &. Setting drawing 49

9.5 Signal Processor NJC-24

50 9. Outline &. Setting drawing

9.6 Transducer NKF-770

9. Outline &. Setting drawing 51

9.7 Transducer NKF-772

52 9. Outline &. Setting drawing

 For further information contact:

Since 1915

HEAD OFFICE & Nittochi Nishi-Shinjuku bidg.

SALES DEPT. 10-1, Nishi-Shinjuku 6-chome, Shinjuku-ku,
Tokyo.160-8328 JAPAN
Phone : +81-3-3348-0151
Fax : +81-3-3348-3648

MAIN PLANT 1-1, Shimorenjaku 5-chome, Mitaka-shi,

Tokyo.181-8510 JAPAN
Phone : +81-422-45-9111
Fax : +81-422-45-9110

EDITION 4
May. 2007
CODE NO. 7ZPBS6805C JRC