JRC JLR-21 User manual

INSTRUCTIONINSTRUCTION
MANUALMANUAL
JLRJLR-21/3121/31
GPS COMPASSGPS COMPASS
ISO 9001, ISO 14001 Certified
MAR. 2021 Edition 7CODE No.7ZPNA4224
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

i
Foreword
Thank you for purchasing the JRC GPS Compass JLR-21/31.
This unit uses signals from GPS satellites to determine the ship’s heading.
ەThoroughly read this instruction manual before operating the equipment.
ەKeep this manual nearby the equipment to allow ready access to it if necessary. It may
provide valuable information on how to deal with a given situation that may arise during the
operation.
7ZPNA4224

ii
Before Commencing the Operation
Symbols
Several symbols are used in this manual to ensure safety and proper operation of the
equipment and to avoid possible human injury or property damage. These symbols
and their meanings are shown below. Please read and understand these symbols
before proceeding to read this manual.
WARNING Instructions shown with this symbol represent what can
cause death or serious injury if not observed.
CAUTION Instructions shown with this symbol represent what may
cause injury or property damage if not observed.
Examples of the Symbols
The symbols shown in the ∆mark represent those that require attention
(including potential dangers and warnings).
A depiction of the type of caution is shown inside the symbol (the left
symbol indicates a general caution).
The symbols shown in the mark represent actions which are
prohibited. A depiction of the type of prohibited action is shown inside
the symbol (the left symbol indicates that disassembly is prohibited).
The symbol indicates required actions. A depiction of the type of
required action is shown inside the symbol (the left symbol indicates that
the power plug must be disconnected from the outlet).

iii
Precautions Upon the Operation
WARNING
Do not disassemble or modify the equipment. Doing so may result in fire,
electric shock, or equipment failure.
Do not allow the display to become wet. Doing so may result in fire, electric
shock, or equipment failure.
Operate the equipment only at the indicated voltage. Failure to do so may
result in fire, electric shock, or equipment failure.
Install this unit at least 1 m away from any magnetic compasses. Installation
near a magnetic compass may result in interference with the magnetic
compass, and may result in an accident.
Do not perform internal inspections or modifications of the equipment.
Inspection or modification by unauthorized personnel may result in fire, electric
shock, or equipment failure. Please consult with JRC or an affiliate to
perform internal inspections or repair.
When disposing of the used lithium battery, place insulating tape over the
battery terminals, or otherwise insulate the battery. Failure to do so may
result in heating, explosion, or fire due to a shorted battery.

iv
Precautions Upon the Operation
CAUTION
Do not use the equipment in environments other than those provided in the
specifications. Doing so may result in equipment failure, malfunction, or
injury.
The dip switches on the unit are all set at the factory, and must not be
changed. Doing so may result in equipment failure, malfunction, or injury.
Do not install the display unit in locations where it may come in contact with
water, oil, or chemicals. Doing so may result in equipment failure,
malfunction, or injury.
Do not install the equipment in places subject to vibration or shock.
Doing so may result in the equipment falling or collapsing, resulting in
equipment failure or injury.
Do not place items on top of the equipment.
Doing so may result in equipment failure, malfunction, or injury.
Please consult with JRC or an affiliate to perform installation. Installation by
unauthorized personnel may result in malfunction.
Only use the specified batteries. Failure to do so may result in battery
leakage or rupture, resulting in fire, injury, or equipment failure.
Use the indicated screws when installing the display unit to a stable wooden
surface. Failure to do so may result in the display unit falling over, causing
injury or property damage.
Use only the specified fuse.
Failure to do so may result in fire or equipment failure.
Use only the specified batteries.
Failure to do so may result in equipment failure or malfunction.
When suspected of an antenna failure, check the satellite information display
for reception from a satellite and exchange the antenna if necessary.

v
CAUTION
When used in other than ships, it may not satisfy the desired performance and
functionality. Because this product is designed to be installed for the ship.
Heaving function of this product is intended to measure swinging in the vertical
direction of the ship.
So, it is not possible to measure something (wave height etc.) other than
swinging in the vertical direction of the ship.
It is not possible to measure also the tsunami.
When you install JLR-21/31 in retractable mast, please observe the following
strictly.
①An unusual vibration or an unusual shock should not occur.
②When the mast has retracted, please stop use. Because normal operation
cannot be performed.
③A difference should not occur in the position by retracting.
Install the sensor where there are no obstacles, in order to ensure that GPS
signals can be directly received from satellites without interference or
reflection of signals from surrounding objects.
Whenever possible, select a place with the following characteristics.
If it is difficult to find an ideal site, select a place temporarily and install the
equipment. Conduct a test to make sure that the proper performance can be
obtained and then fix the equipment in position. If it is installed at an improper
place, reception accuracy may be impaired.
1. An open space, which allows uniform reception of satellite
signals.
2. Far away from any high power transmission antennas.
3. Outside radar beams.
4. Away from the INMARSAT antenna by at least 5 meters and
outside the INMARSAT beam.
5. Away from the antenna of a VHF transmitter and a direction
finder by at least 3 meters.
6. Away from a Magnetic Compass by at least 1 meter.
7. 3 meters or more away from amateur radio antennas.

vi
CAUTION
Do not bend the cables included with this equipment excessively, or twist them or
subject them to other strong forces. Doing so may result in damage to the
interior or exterior of the cables, and may result in fire or electrocution.
Do not install the equipment in places subject to vibration or shock.
Doing so may result in the equipment failure due to reception problems.
This equipment uses GPS satellite signals to determine the bearing of the ship.
Install the sensor where there are no impediments to electrical signal reception,
and no signal reflection. If the sensor installation location environment is
unsatisfactory, ship bearing calculations is repeatedly interrupted.
If selection of the optimal installation location is difficult, and some concessions
must be made, place the sensor in the desired installation location and test the
acceptability of the sensor results before permanently installing the sensor.
Installing the sensor in an inappropriate location may result in decreased
accuracy and equipment failure.
Poor visibility and the high occurrence of reflected waves may result in a
decrease in bearing accuracy or the interruption of bearing measurement.
Whenever possible, select a place having the following characteristics.
Out of the mast's
shadow.
(2 m or more
separation)
2 m or more outside of any radar beams.
Installation near radar antennas may result in multipath wave interference, which decreases the
accuracy of the equipment.
Whenever possible, install the equipment above or below any beams and keep it out of the scope of
the beams.
Away from the Inmarsat antenna by at least 5 m,
and out of the scope of the beam.
An open space which
allows uniform
reception of satellite
signals.
Inmarsat antenna
redome
Radar antenna

vii
Appearance of the Equipment
●Standard Equipment
NWZ-4701 Display Unit
NNN-21 Sensor Unit
NNN-31 Sensor Unit

viii
Contents
Foreword..............................................................................................i
Before Commencing the Operation.....................................................ii
Precautions Upon the Operation........................................................ iii
Appearance of the Equipment........................................................... vii
Section 1 EQUIPMENT OVERVIEW ............................................ 1-1
1.1 Functions..............................................................................................1-1
1.2 Features ...............................................................................................1-1
1.3 Configuration ........................................................................................1-2
1.4 Construction .........................................................................................1-4
1.5 System Diagram...................................................................................1-6
Section 2 Installation .................................................................... 2-1
2.1 Sensor Installation................................................................................2-2
2.2 Didplay Unit Installation ......................................................................2-15
2.3 Cable Connection...............................................................................2-18
Section 3 Names and Functions of EACH UNIT .......................... 3-1
3.1 NWZ-4701 Display Unit .....................................................................3-1
3.2 NNN-21/31 Sensor Unit .....................................................................3-3
Section 4 Display.......................................................................... 4-1
4.1 Display Screen .....................................................................................4-1
4.1.1 Compass Screen ............................................................................4-2
4.1.2 Bow Heading Screen ......................................................................4-3
4.1.3 Navigation Screen...........................................................................4-4
4.1.4 Turn Rate Screen............................................................................4-5
4.1.5 Water Speed / Ground Speed Screen ............................................4-6
4.1.6 Trend Graph Screen .......................................................................4-6
4.1.7 Calculate Distance Screen..............................................................4-7
4.1.8 Configuration Screen ......................................................................4-7
Section 5 Operation...................................................................... 5-1
5.1 MENU LIST ..........................................................................................5-1
5.1.1 Menu List ........................................................................................5-1
5.2 BASIC OPERATION.............................................................................5-4
5.2.1 Turning the Unit On.........................................................................5-4
5.2.1.1 Startup (Standard)....................................................................5-4
5.2.1.2 Startup (Error-1).......................................................................5-5
5.2.1.3 Startup (Error-2).......................................................................5-5
5.2.1.4 Startup (Error-3).......................................................................5-6
5.2.2 Turning the Unit Off.........................................................................5-6
5.2.3 Adjusting the Backlight....................................................................5-7
5.2.4 Adjusting the Contrast.....................................................................5-7
5.2.5 Stopping the Buzzer........................................................................5-8