Japan Radio Co. JLR-7900 User manual

INSTRUCTIONINSTRUCTION
MANUALMANUAL
JLRJLR-76007600/7/7900900
GPS NAVIGATORGPS NAVIGATOR
ISO 9001, ISO 14001 Certified
FEB. 2017 Edition 3CODE No.7ZPNA4288
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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Foreword
Thank you for purchasing the JRC GPS Navigator JLR-7900/7600.
This equipment is a high-performance navigation equipment consisting of a DGPS/GPS
sensor and navigator, can retrieve the position data using the DGPS/GPS sensor to display
various navigation information on the display.
ƔThoroughly read this instruction manual before operating the equipment.
ƔKeep 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.
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7ZPNA4288

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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).

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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.
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.
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.

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Precautions Upon the Operation
CAUTION
Do not use the equipment in the environment other than those provided in the
specification. Doing so may result in equipment failure, malfunction, or injury.
Do not install the equipment in the place subject to vibration or shock.
Doing so may result in the equipment falling or collapsing, resulting in
equipment failure or injury.
Do not place any item on the 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.
Do not install the display unit in the location where it may come in contact with
water, oil, or chemicals. Doing so may result in equipment failure,
malfunction, or injury.
This equipment is not designed to automatically make judgments on the
position data. The navigation information including the position data needs to
be judged by the user himself.
Do not use benzine, alcohol or thinner when caring this equipment.
Doing so may result in removing the paint or changing of properties.
Wipe off the grime lightly with a dry soft cloth.
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 battery.
Failure to do so may result in equipment failure or malfunction.

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When connecting the cable attached to the equipment, do not bend it acutely, twist
it, or impart excessive force. Doing so sometimes causes cracks or damage to the
coating, resulting in fire or electrocution.
Do not install the sensor where there is excessive vibration.
Vibration may cause sensor failure.
Do not paint the sensor.
Doing so may result in reception problems.
Do not install the sensor where temperature exceeds 55 degrees Celsius and
there is covered with exhaust gas from funnel . Doing so may result in equipment failure
or malfunction.
Use the fit cable, when connecting to the junction box.
The Junction box rubber gaskets (25 f Gland side) fit 10mm – 20mm cables.
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.
CAUTION
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.

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Appearance of the Equipment
●NWZ-4610 Display Unit
●JLR-4341 DGPS Sensor Unit
●JLR-4340 GPS Sensor Unit

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Terminology
Term Meaning (Descriptions)
2D (2 dimension) Positioning with antenna elevation height in addition to satellite
data.
3D (3 dimension) The three dimensional position fix, 4 or more satellites required.
Active route Route that is currently used by a ship
Anchor alert This alert monitors that the own ship is the preset distance or more
away from the waypoint.
Arrival alert This alert informs that the own ship has traveled the preset distance,
approaching the waypoint.
Beacon information Beacon data which is broadcast by message type 16.
CCRP Abbreviation of Consistent Common Reference Point. Reference
position of the own ship.
CDI Abbreviation of Course Deviation Indicator. This indicator shows
information on the deviation from the scheduled route and on the
direction into which the ship should be steered.
Checksum An error detection method to check that the data has been correctly
transmitted.
COG Course Over Ground.
Course Direction in which the ship is traveling, which is the bearing mainly
displayed by the GPS.
DISP-DPU The main circuitry of display unit.
DGPS Abbreviation of Differential Global Positioning System. GPS
satellite error data sent from a reference station whose position is
accurately known is received via beacon from a beacon station,
improving positioning accuracy.
FRAM Nonvolatile memory using a ferroelectric substance.
Geodetic Conditions for expressing position via latitude and longitude.
GPS Satellite (GPS) Abbreviation of Global Positioning System. Refers to satellites
launched for navigational support of military vessels managed by
the United States Department of Defense.
HDOP Abbreviation of Horizontal Dilution of Precision. Indicates accuracy
of positioning. The smaller the number, the higher the accuracy. If
GPS satellites are unevenly distributed, this number will grow. If
GPS satellites are evenly distributed, this number will be smaller.
IEC IEC is the abbreviation of International Electrotechnical
Commission. It is an international standard governing electrical
and electronic technologies.
IPXX IPXXisDegrees of protection provided by enclosures (IP Code)
1st numeral: Against ingress of solid foreign objects (0 – 6)
2nd numeral: Against ingress of water with harmful effects (0 - 8).
(IPX4: splash-proof, IPX6: waterproof)
LCD Unit (LCD) Liquid Crystal Display Unit.
Log Pulse Contact output signal, output pulse per nm.
Expressed in units of "p/nm". mi/h Unit of ship speed.
display Method for expressing the present position with loran system time

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difference. (The method is for operators who have a background in
loran navigation.)
Master reset This function changes the settings of the display unit and GPS
sensor back to the factory settings. The function clears all the
data.
Multipath Wave Waves received from multiple directions due to reflection or
refraction of an initial wave by obstacles.
NMEA0183 (NMEA) Abbreviation of National Marine Electrical Association 0183.
International standard for naval equipment transmission
established by the National Marine Electrical Association.
Positioning Use of GPS or DGPS receiving functions to determine the current
position of a ship.
RAIM Accuracy Standard
(RAIM) Abbreviation of Receiver Autonomous Integrity Monitoring. This
system automatically detects failed satellites and deselects their
positioning data from calculations. Including data from failed
satellites will result in a decrease in positioning accuracy; the RAIM
accuracy standard indicates the accuracy degradation base for
removal of failed satellites from positioning calculations.
Ranging Positioning with the use of SBAS satellite in addition to GPS
satellite.
Reception Level GPS signal reception level.
Route plan Plan registered with multiple waypoints in the navigation order
RS-422 Balanced serial transmission standard.
RS-485 Balanced serial transmission standard.
SBAS Abbreviation of Satellite Based Augmentation System. It is a
blanket term for wide scale GPS support systems using fixed
position satellites which send GPS error correction data over a wide
range.
SBAS Search SBAS reception mode (manual / automatic).
Smoothing Function for averaging over a specified number of seconds.
SOG Speed Over Ground, This is the ship’s relative speed to the ground.
SPEED The speed mainly measured by the GPS.
STW Speed Through Water.
Symbol information Information of symbols displayed on the plotting screen. The
information includes symbol positions, comments, etc.
TD Abbreviation of Time Difference. Time difference from the
master-station signal of the loran system to the slave-station signal.
Message Type 0 SBAS satellite test broadcasting.
UTC Abbreviation of Coordinated Universal Time.
XTD alert This alert informs that the own ship has got out of the scheduled
route by the preset distance or more.