JRC JLN-900 Quick guide

INSTALLATION ANDINSTALLATION AND
INSTRUCTION MANUALINSTRUCTION MANUAL
JLNJLN-900900
SPEED LOGSPEED LOG
ISO 9001, ISO 14001 Certified
MAR. 2020 Edition 1CODE No.7ZPNA3210
Not use the asbestos
For further information,contact:
URL Head office : http://www.jrc.co.jp/eng/
Marine Service Department
1-7-32 Tatsumi, Koto-ku, Tokyo 135-0053, Japan
: [email protected]
:
[phone]
e-mail
One-call

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7ZPNA3210

ii
z Emergency Measures z
Method of First-Aid Treatment
Precautions for First-Aid Treatments
Apply artificial respiration to the person who collapsed, minimizing moving as much
as possible avoiding risks. Once started, artificial respiration should be continued
rhythmically.
(1) Refrain from touching the patient carelessly as a result of the accident; the first-
aider could suffer from electrical shocks by himself or herself.
(2) Turn off the power calmly and certainly, and move the patient apart from the
cablegently.
(3) Call or send for a physician or ambulance immediately, or ask someone to call
doctor.
(4) Lay the patient on the back, loosening the necktie, clothes, belts and so on.
(5) (a) Feel the patient's pulse.
(b) Check the heartbeat by bringing your ear close to the patient's heart.
(c) Check for respiration by bringing your face or the back of your hand to the
patient's face.
(d) Check the size of patient's pupils.
(6) Opening the patient's mouth, remove artificial teeth, cigarettes, chewing gum, etc.
if any. With the patient's mouth open, stretch the tongue and insert a towel or the
like into the mouth to prevent the tongue from being withdrawn into the throat. (If
the patient clenches the teeth so tight that the mouth won't open, use a
screwdriver or the like to force the mouth open and then insert a towel or the like
into the mouth.)
(7) Wipe off the mouth to prevent foaming mucus and saliva from accumulating.

iii
Treatment to Give When the Patient Has a
Pulse Beating but Has Ceased to Breathe
 Performing mouth-to-mouth artificial respiration
(1) Bend the patient's face backward until it is directed to look back. (A pillow
may be placed under the neck.)
(2) Pull up the lower jaw to open up the airway. (To spread the airway)
(3) Pinching the patient's nose, breathe deeply and blow your breath into the
patient's mouth strongly, with care to close it completely. Then, move your
mouth away and take a deep breath, and blow into his or her mouth. Repeat
blowing at 10 to 15 times a minute (always with the patient's nostrils closed).
(4) Continue artificial respiration until natural respiration is restored.
(5) If the patient's mouth won't open easily, insert a pipe, such as one made of
rubber or vinyl, into either nostril. Then, take a deep breath and blow into the
nostril through the pipe, with the other nostril and the mouth completely
closed.
(6) The patient may stand up abruptly upon recovering consciousness. Keep the
patient lying calmly, giving him or her coffee, tea or any other hot drink (but
not alcoholic drink) to keep him or her warm.
Mouth-to-mouth artificial respiration with the patient's head lifted
[1]
(1) Lift the back part of the patient's
head. Support the forehead with
one of your hand and the neck with
the other hand.o [1].
Many patients will have their
airways opened by lifting their head
in this way to ease mouth-to-mouth
artificial respiration.
[2]
(2) Closing the patient's mouth with
your mouth, press your cheek
against the patient's noseo [2].
Alternatively, hold the patient's
nose with your finger to prevent air
leak
o [3].
[3]
(3) Blowing air into the patient's lungs.
Blow air into the patient's lungs
until chest is seen to rise. The first
10 breaths must be blown as fast as
possible.
Fig. 1 Mouth-to-mouth artificial respiration

iv
Flow of Cardiopulmonary Resuscitation (CPR)
Not breathing or can not judge
Chest compressions
- With each compression, Depress the chest wall
to a depth of approximately 5 cm
- Perform uninterrupted chest compressions at
the rate of about 100 to 120 times per
minute.
Combination of chest compressions and
rescue breaths; omittable Note(1)
- Untrained first-aiders only performs chest
com
p
ressions.
Note (1) Omission of artificial respiration
If you are worried about infection due to
damage in the oral cavity or if you are
hesitant to use mouth-to-mouth artificial
respiration,
If it takes time to prepare the mouthpiece for
artificial respiration, skip the artificial
respiration and proceed to the next.
Arrival of an AED
Turn on the power.
- Use the AED by following its voice prompts.
Fittin
g
of the electrode pads, etc.
Automatic electrocardiogram
analysis
Do not touch the injured or ill
person.
A person is collapsing.
- Secure the safety of the surrounding area.
- Prevent secondar
y
disasters.
Electric shock is needed.
Check for response.
Call while tapping the shoulder.
Breathing
Recovery position
- Lay the injured or
ill person on
his/her side and
wait for the arrival
of the emergency
services.
Electric shock is not needed.
Not responding or can not judge
Ask for help.
Make an emergency call.
Ask to bring an AED.
Delivery of electric shock
Listen to the appeal of the
injured or ill person and give
the necessary first-aid
treatment.
Responding
Resume CPR from chest
compressions by following the
voice prompts of the AED.
When the injured or ill
person has been
handed over to the
emergency services or
has started moaning or
breathing normally, lay
him/her on his/her side
in a recovery position
and wait for the arrival
of emergency services.
When to
stop CPR
Check for breathing and judge for
cardiopulmonary arrest.
Check for breathing.
A person is collapsing.
- Secure the safety of the surrounding area.
- Prevent secondar
y
disasters.
The AED
automatically
analyzes the
heart rhythm
every 2 min.
Artificial respiration Twic Optional Note
(
1
)
Cardiopulmonary resuscitation
Chest compressions 30 times
Artificial respiration Twice Optional Note
(
1
)

v
Specific Procedures for Cardiopulmonary Resuscitation (CPR)
1. Check the scene for safety to prevent secondary disasters
a) Do not touch the injured or ill person in panic when an accident has
occurred. (Doing so may cause electric shock to the first-aiders.)
b) Do not panic and be sure to turn off the power. Then, gently move
the injured or ill person to a safe place away from the electrical
circuit.
2. Check for responsiveness
a) Tap the shoulder of the injured or ill and shout in the ear saying, "Are you OK?"
b) If the person opens his/her eyes or there is some response or gesture, determine it as
"responding." But, if there is no response or gesture, determine it as "not responding."
3. If responding
a) Give first-aid treatment.
4. If not responding
a) Ask for help loudly. Ask somebody to make an emergency call
and bring an AED.
• Somebody has collapsed. Please help.
• Please call an ambulance.
• Please bring an AED.
• If there is nobody to help, call an ambulance yourself.
5. Check for breathing
a) Look to see if the chest and abdomen are rising and falling.
b) If the injured or ill person is breathing, place him/her in the recovery
position and wait for the arrival of the emergency services.
• Position the injured or ill person on his/her side.
Are you OK?
Please call an
ambulance.
Please bring an
AED.

vi
6. Cardiopulmonary resuscitation (CPR) (combination of chest compressions and
rescue breaths)
a) Chest compressions
1) Position of chest compressions
• Position the heel of one hand in the center of the chest, approximately between the
nipples, and place your other hand on top of the one that is in position.
2) Perform chest compressions
• Perform uninterrupted chest compressions of
30 at the rate of about 100 to 120 times per
minute.
While locking your elbows positioning yourself
vertically above your hands.
• With each compression, depress the chest wall to a depth of approximately 5 cm.
b) Combination of 30 chest compressions and 2 rescue breaths
1) Untrained first-aiders only performs chest compressions.
2) If trained first-aiders has the technique and a will to perform rescue breaths, give 2 rescue
breaths after performing 30 chest compressions.
3) If there is a fear of infection, use a mouthpiece for rescue breathing and other protective
devices to prevent infections.
4) Continuously perform the combination of 30 chest compressions and 2 rescue breaths
without interruption.
5) If there are two or more first-aiders, alternate with each other approximately every two
minutes (five cycles of compressions) without interruption.
30 times
Compres
s with
these
parts (the
heels of
both
hands).
2 times
Mouthpiece for rescue
breathing
CPR mask

vii
7. When to stop cardiopulmonary resuscitation (CPR)
a) When the injured or ill person has been handed over to the
emergency services
b) When the injured or ill person has started moaning or breathing
normally, lay him/her on his/her side in a recovery position and wait
for the arrival of emergency services.
8. Arrival and preparation of an AED
a) Place the AED at an easy-to-use position. If there are multiple first-aiders, continue CPR until
the AED becomes ready.
b) Turn on the power to the AED unit.
Depending on the model of the AED, you
may have to push the power on button, or the
AED automatically turns on when you open
the cover.
c) Follow the voice prompts of the AED.
9. Attach the electrode pads to the injured or ill person's bare chest
a) Remove all clothing from the chest, abdomen, and arms.
b) Open the package of electrode pads, peel the pads off and securely
place them on the chest of the injured or ill person, with the adhesive
side facing the chest. If the pads are not securely attached to the
chest, the AED may not function. Paste the pads exactly at the
positions indicated on the pads, If the chest is wet with water, wipe dry
with a dry towel and the like, and then paste the pads. If there is a
pacemaker or implantable cardioverter defibrillator (ICD), paste the
pads at least 3cm away from them. If a medical patch or plaster is
present, peel it off and then paste the pads. If the injured or ill person's
chest hair is thick, paste the pads on the chest hair once, peel them off
to remove the chest hair, and then paste new pads.
c) Some AED models require to connect a connector by following voice prompts.
d) The electrode pads for small children should not be used for children over the age of 8 and for
adults.
Turn on the power.

viii
10. Electrocardiogram analysis
a) The AED automatically analyzes electrocardiograms. Follow the
voice prompts of the AED and ensure that nobody is touching the
injured or ill person while you are operating the AED.
b) On some AED models, you may need to push a button to analyze
the heart rhythm.
11. Electric shock (defibrillation)
a) If the AED determines that electric shock is needed, the voice
prompt saying, "Shock is needed" is issued and charging starts
automatically.
b) When charging is completed, the voice prompt saying, "Press the
shock button" is issued and the shock button flashes.
c) The first-aider must get away from the injured or ill person, make
sure that no one is touching him/her, and then press the shock button.
d) When electric shock is delivered, the body of the injured or ill person may jerk.
12. Resume chest compressions
a) Resume chest compressions by following the voice prompts of the AED.
- With each compression, Depress the chest wall to a depth of
approximately 5 cm
- Perform uninterrupted chest compressions of 30 at the rate of about
100 to 120 times per minute.
13. Automatic electrocardiogram analysis
a) When 2 minutes have elapsed since you resumed cardiopulmonary resuscitation (CPR), the
AED automatically analyzes the electrocardiogram.
b) If you suspended CPR by following voice prompts and AED voice prompt informs you that
shock is needed, give electric shock again by following the voice prompts.
If AED voice prompt informs you that no shock is needed, immediately resume CPR.
14. When to stop CPR (Keep the electrode pads on.)
a) When the injured or ill person has been handed over to the
emergency services
b) When the injured or ill person has started moaning or breathing
normally, lay him/her on his/her side in a recovery position and wait
for the arrival of emergency services.
Press the shock button.

ix
Table of Contents JLN-900
i
i
Description
1 Introduction
2 Technical Description
3 Technical Specification
4 Installation of Transducer and Bottom Parts
5 Installation of NJC-80 Sig.Processor
6 NQA-4480 Sig.Distributor
7 Display Technical Dsecription
8 Analogue Display Technical Manual
9 Menu System
10 Water Track Unit Assembly;
Technical Manual and Menu System
11 IEC 61162 / NMEA 0183 User Guide
12 Harbour Acceptance Test
13 Calibration and Sea Acceptance Test
14 JLN-900 System drawings
15 JLN-900 System description, labels and drawings
16 JLN-900Manual - Annex
I – Equipment recycling
II – Energy saving

x
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1-1
1. Introduction
The purpose of this manual is to fulfil the needs for normal installation, commissioning,
every-day use and also to give enough guidance for ship’s crew and local service agents to
pinpoint a faulty sub-unit.
Liability
All equipment described in this manual is designed for use on board ships to fulfil
requirements specified in various IMO documents.
However, equipment may sometimes fail or work outside its performance specification due to
component malfunction or depending on other factors.
JRC will not take any responsibility if this equipment is used in such a way that it’s normal or
abnormal function causes damage or creates situations that can be dangerous.
All specifications given in this manual are subject to changes without prior notice!
Risk Assessment
We, as a manufacturer, evaluate that applicable standards cover all reasonably foreseeable
risks.
JRC

1-2
JLN-900Acoustic Correlation Dual Speed Log
System Description
The system measures one-axis relative speed as well as two-axis bottom track speed in a
combined transducer.
In the JLN-900 the speed log device for STW (Speed Through the Water) is separated from
the speed log device for SOG (Speed Over the Ground).
The data obtained from the JLN-900 are:
a) Longitudinal bottom track speed (= SOG longitudinal)
b) Transverse bottom track speed (= SOG transverse)
c) Longitudinal water track speed (= STW)
d) Docking log (if an optional Rate-of-Turn Gyro is connected to the system)
e) Depth information (= DPT)
Sig.Distributor
Sig.Distributor is mounted on the bridge and receives the NMEA message from the
Sig.Processor. The Sig.Distributor has various options to perform message conversion and
calculations and has also a variety of inputs for taking data from other units. Outputs available
are serial (NMEA), relay contacts, opto-couplers and analogue output. The Sig.Distributor
can also take data from a connected turn-rate gyro. If the docking log option in the
Sig.Distributor is enabled, the data from the log and the gyro are combined to create also
docking log information that can be used by the docking log display .
MainDisplay
NWW-82 Main Display are versatile instruments used primarily as a display to indicate speed,
distance and depth. It can also be used to remotely control such equipment, which is not easily
accessible or has no user interface, for example a Sig.Processor, Sig.Distributor.
Transducer
The combined transducer is mounted in a sea valve arrangement suitable both for single and
double bottom design. The transducer incorporates as standard a 30 metres cable for
connection to the Sig.Processor. Both speeds and depth are measured with this single,
combined transducer that is equipped with separate crystals for bottom track measurement (5
off) as well as for water track measurement (2 off).

1-3
1. Block diagrams
Block diagram for a typical JLN-900system:
Rate-of -Turn Gyro signal from external source to Sig.Distributor adds docking log functionality.
Bridge Wing
Docking Display
Option
Bridge Wing
Docking Display
Option
Engine Control Room
Main Display
Speed Log Display
Option
Wheelhouse
Main Display
Master Display
STW Device
y
y
Main Display
Speed Log Display
SOG Device
Sig.Distributor
Bow
Sig.Processor

1-4
2. List of a JLN-900 System
Standard items for a system
Unit number Name of unit Description
NJC-80 Sig.Processor Log main unit
NQA-4480 Sig.Distributor Sig.Distributorhas a variety of inputs and outpus.
CFT-780 or
CFT-780-4
Transducer Transducer with 30m cable
Transducer with 40m cable
NKF-980 Sea Valve Mounting Set Single Bottom with Sea Valve
Without Bottom Flange
NWW-82
NWW-82
Main Display
Main Display
Serial Digital SOG/STW speed, total/trip distance.
Also used as a remote log control unit,
“Speed Log Master Display”
Note! The JLN-900 system must consist of at least
two NWW-82displays, one marked STW Device
and one marked SOG Device. Each of these
displays shall be connected according to JLN-900
drawings in this manual.
Optional items for a system
Unit number Name of unit Description
NWW-85 Docking Display Serial Digital SOG/STW, docking log display
5HTAQ00006 BULKHEAD M BOX Bulkhead mounting box Main/Docking Display
5HTAQ00007 EXTENSION BOARD Extension board Main/Docking Display
NCM-1080 Dimmer Unit External dimmer Main/Docking Display
NCM-1180 Control Unit Remote Control Main/Docking Display
NWW-828 Analog Display Analogue indicator, -8 +30kt
Include with Potentionmeter

2-1
JLN-900
Technical
Description

2-2
Contents:
1 PRINCIPLE OF OPERATION 2-3
2 SPEED OVER GROUND MEASUREMENT 2-3
2.1 Acoustic transmission/reception 2-3
2.2 Depth measurement 2-4
2.2.1 Seek mode 2-4
2.2.2 Lock mode 2-4
2.3 Speed measurement 2-5
2.3.1 Speckle pattern 2-5
2.3.2 Correlation technique 2-10
3 CFT-780 TRANSDUCER 2-11
4 NJC-80 SIG.PROCESSOR 2-12
4.1 BTU-PCB 2-13
4.2 WTU-Assy 2-13
4.3 Data transmission / reception 2-13

2-3
Principle of operation
The JLN-900 Log system is actually two more or less independent log systems, one for sensing
speed over ground (SOG), Bottom Track Unit, (BTU), and the other for sensing speed
through water (STW), Water Track Unit (WTU – Assy.).
Although both sensor systems are based on correlation technique, sharing many common
features, the principles are somewhat different. Accordingly, the WTU – Assy. Is described in
its own document.
1 Speed over ground measurement
1.1 Acoustic transmission/reception
The correlation speed log uses acoustic waves in water. The transducer is mounted flush with
the hull, see figure below. Waves are transmitted from the piezo-electric elements into the
water, down to the sea-bed. The sea-bed reflects the signal back to the piezo-electric elements,
which acts as receivers, when not used as transmitters. We use broad antenna lobes because we
are not sensitive to lobe widths, compared to a system using Doppler technique.
S1 S2
Hull
Hull
Bottom track transmission
Piezo-electric elements
Projected bottom area
Acoustic beams from transmitting
piezo-electric elements
Transducer
Ahead

2-4
The beam travels down to the sea bed with a velocity of close to 1500 m/s. This velocity is
almost constant for different frequencies. If we have a calibrated depth meter, we may have to
compensate for salinity, density and temperature differences. The SOG correlation speed logs
operate at 150 kHz, giving a wavelength of 10 mm.
1.2 Depth measurement
The depth measurement is divided into two phases: first we seek the depth by transmitting a
pulse and wait for the echo to return. Once the depth has been measured we use a locked loop
to adjust the depth to correct value.
1.2.1 Seek mode
In the six predefined seek modes the log transmits a pulse. The pulse length varies between 0.3
and 67 ms corresponding to seek ranges from minimum depth 1 to maximum depth 400 meters.
After the transmit pulse the receiver is sampled at regular intervals. The echo will have the
same length as the transmitted pulse. The log correlates the transmitted pulse with the echo to
form an echo function. The peak of this function corresponds to the time it takes for the pulse
to travel from the hull to the sea-bed and back. If a valid echo is found the log enters the depth
lock mode.
Depth seek mode
T
ransmit pulse
Echo signal
Sampling
2 * Depth / C
1.2.2 Lock mode
In the depth lock mode we use the known depth value to measure the depth more accurately.
The depth lock mode is divided into 9 cycles, see figure below. During cycle 1 a pulse is
transmitted. The length of this pulse is equal to the time it takes for the wave to travel from the
transducer to the sea bottom. During cycle 2 this signal travels back to the transducer. During
cycle 3 the echo pulse is active on the transducer elements. The positive edge of the returned
echo is locked to always come at start of cycle 3, se figure below.