Furuno GP-1850DF User Manual

INSTALLATION MANUAL

COLOR DGPS/PLOTTER/SOUNDER

GP-1850DF

COLOR GPS/PLOTTER/SOUNDER

GP-1850F

Safety Instructions for the Installer .......................i

Equipment Lists .....................................................ii

System Configuration ...........................................iv

1. Installation of Standard Equipment ...............1-1

1.1 Installation of Display Unit ..............................................1-1

1.2 Installation of Antenna Unit .............................................1-3

1.3 Installation of Transducers ............................................... 1-4

1.4 Installation of Sensors ....................................................1-14

2. Wiring ...............................................................2-1

3. Initial Settings..................................................3-1

3.1 NMEA Setting ..................................................................3-1

3.2 Output Data Sentences .....................................................3-3

3.3 Antenna Height.................................................................3-4

3.4 Baud Rate Setting (GP-1850DF only)..............................3-4

3.5 Beacon frequency Setting (GP-1850DF only) .................3-5

3.6 Depth Adjustment.............................................................3-6

3.7 External Equipment Setup (Option) ................................. 3-7

3.8 Selecting the Echo Sounder Output Power ....................3-10

4. Installation of DGPS Beacon Receiver

(for GP-1850F) .................................................4-1

APPENDIX TRIDUCER 525ST-PWC/PWD .......AP-1

PACKING LIST .................................................... A-1

OUTLINE DRAWINGS......................................... D-1

INTERCONNECTION DIAGRAM ........................ S-1

SCHEMATIC DIAGRAM ...................................... S-2

(

C

9-52, Ashihara-cho,
Nishinomiya, Japan

Telephone: [phone]
Telefax: 0798-65-4200

All rights reserved.

Printed in Japan

PUB. No. IME-43950-J

HIMA)

GP-1850F/1850DF

Your Local Agent/Dealer

FIRST EDITION : FEB. 1999
J : NOV. 01, 2001

CAUTION

WARNING

SAFETY INSTRUCTIONS

Safety Instructions for the Installer

WARNING

Do not work inside the
equipment unless totally
familiar with electrical
circuits.

Hazardous voltage which can
shock, burn or cause serious
injury exists inside the equip­ment.

Turn off the power at the
mains switchboard before
beginning the installation.
Post a sign near the switch
to indicate it should not be
turned on while the equip­ment is being installed.

Fire, electrical shock or
serious injury can result if the
power is left on or is applied
while the equipment is being
installed.

CAUTION

Ground the equipment to
prevent electrical shock
and mutual interference.

Confirm that the power supply voltage
is compatible with the voltage rating
of the equipment.

Connection to the wrong power supply
can cause fire or equipment damage. The
voltage rating appears on the label at the
rear of the display unit.

Use the correct fuse.

Use of a wrong fuse can cause fire or
equipment damage.

Keep the following compass safe
distance.

Standard Steering
Display Unit 0.98 m 0.74 m

When handling the transducer cable,
keep in mind the following points.

•

Keep the cable away from oil and
fuel.

•

Keep the cable away from the
place where it may be damaged
during the installation.

•

Do not paint the cable.

The sheath of the transducer cable is
made of chlorophrene rubber (or vinyl
chloride). Therefore, do not paint the
sheath with organic liquid (such as
toluene) since it may harm the sheath.

i

iiiiiiiiiiiii

Equipment Lists

Standard supply

.oNemaNepyT.oNedoCytQskrameR

1tinuyalpsiD

2tinuannetnA

3recudsnarT

4straperapS10520-41PS062-573-4001esuF
5slairetamnoitallatsnI00250-41PC694-140-0001 .yssaelbaC,elbacrewoP

6seirosseccA

E-F0581-PG-1F0581-PGrof

E-FD0581-PG- FD0581-PGrof
710-APG­810-APG- FD0581-PGrof
910-APG- FD0581-PGrof

DSP5-025521-510-000

DSM5-025721-510-000

10420-41PF072-573-4001revocdraH

20420-41PF051-673-4001

1

1.enotceles,tuptuoW006rofDWP5-025621-510-000

Optional equipment

.ONemaNepyT.oNedoCskrameR

810-A01-0581-208-RG894-140-000
810-N01-0581-208-RG405-140-000A0007-RG,810-APG

1

tik

2

3

.yssa

tes

reviecernocaeB

elbacannetnA

elbacannetnA

51-D3-SP-CNT076-331-000

00710-02PC011-273-400

01710-02PC021-273-400

S810-A51-0581-209-RG994-140-000
S810-N51-0581-208-RG505-140-000A0007-RG,810-APG

910-N01-0581-208-PG846-140-000A0007-RG,910-APG

S910-N51-0581-209-RG946-140-000A0007-RG,S910-APG

F0581-PGrof

,lebalkramtuptuo,swercS

noihsucrebbur

pihw,A0007-RG,810-APG

annetna

pihw,A0007-RG,S810-APG

annetna

elbacannetnarof,m51

noisnetxe

elbacannetnarof,m03

noisnetxe

elbacannetnarof,m05

noisnetxe

4.yssAelbaC050-3000FPS7A-JM10-037-631-000

5

6

8

tnuomtsaM

erutxif

elgna-thgiR

esabannetna

annetnaelgna-L

esab

esabannetnA

gnitnuomliarrof

1110-02PC087-563-400

033AQ-31.oN932-308-000

013AQ-31.oN042-308-000

0615CR-31.oN411-608-000

tinuannetnagnitnuomrof7

ii

Optional equipment (con't)

.oNemaNepyT.oNedoCskrameR

S810-APG264-140-000FD0581-PGrof

9tinuannetnA

01recudsnarT

11yssaelbaC2904S20484-431-000noitcennocrecudsnartWk1rof

21xobgnihctaM0001-BM908-040-000noitcennocrecudsnartWk1rof

31rosnesTS

41StiklluhrennI033AQ-31.oN042-308-000tinuannetnagnitnuomrof

51

erutarepmeT

rosnes

610-APG635-140-000F0581-PGrof

S910-APG455-140-000FD0581-PGrof

DSP5-025521-510-000W006rof

DWP5-025621-510-000W006rof,tnuommosnartelbacm8/w

DSM5-025721-510-000

T1-002/05071-510-000Wk1rof

BSM20-TS689-731-000epytlluh-urhT

BSP20-TS789-731-000epytlluh-urht,elbacm8/w

BTM20-T620-040-000
BSM20-T040-040-000
BSM30-T720-040-000

,rotcennocfoorpretawdnaelbacm8/w

W006rof

DSM-TS425422-510-000
DSM-TS525362-510-000

61recudirT

DWP-TS025821-510-000
DWP-TS525162-510-000

71

81reifitceR26-RP

91.yssaelbaC

02annetnapihW2.1-WAF640-631-000FD0581-PGrof
12

retrevnoC

noitcennoc

etomeR

rellortnoc

7414S20280-141-000

484-310-000CAV001rof
584-310-000CAV011rof
684-310-000CAV022rof

784-310-000CAV032rof
050-1100FPS6A-JM442-231-000m5,P4-P6,radarnoitcennocrof
001-1100FPS6A-JM633-231-000m01,P4-P6,radarnoitcennocrof
050-2100FPS6A-JM424-431-000m5,P6-P6,S/Erodiavanrof
001-2100FPS6A-JM718-331-000m01,P6-P6,S/Erodiavanrof

E-F581-CMR023-573-400yrettab,revoclyniv,rellortnoC

W006rof

W006rof

22draCMAR400-CM20MAR00097-173-400BM2
32

nocaeBSPGD

revieceR

08-RG-F0581-PGrof

iii

System Configuration

The GP-1850F/1850DF mainly consists of a display unit, a GPS antenna and a
dual frequency transducer. A DGPS beacon receiver is provided inside the display
unit for GP-1850DF type. The mini chart card drive in the display unit loads elec­tronic charts. External equipment which can be connected include water tempera­ture and speed sensors, autopilot, and DGPS beacon receiver (GP-1850F).

GPA-018

GPA-017
(for GP-1850F)

ANTENNA UNIT
Receives signal from

GPS satellite and beacon
reference station
(GP-1850DF only).

(for GP-1850DF)

1.2 m Whip antenna
(Option)

GPA-019
(for GP-1850DF)

DISPLAY UNIT

Ship’s position is
calculated in longitude
and latitude from signal
received from the an­tenna unit and displayed
on the screen.

*Matching

Box

MB-1000

Temp. sensor
(option)

Ship’s mains

10.8—31.2 VDC

External equipment
(Autopilot, etc.)

DGPS beacon receiver
GP-1850F only

Transducer

*Required for 1 kW transducer only

iv

1. Installation of Standard Equipment

1.1 Installation of Display Unit

Mounting considerations

The display unit can be installed on a tabletop, on the overhead or flush mounted
in a console or panel.

Figure 1-1 Tabletop, overhead mounting methods

OverheadTabletopHard Cover

When selecting a mounting location for the display unit keep the following in mind:

• Keep the display unit out of direct sunlight.

• The temperature and humidity should be moderate and stable.

• Locate the unit away from exhaust pipes and vents.

• The mounting location should be well ventilated.

• Mount the unit where shock and vibration are minimal.

• Keep the unit away electromagnetic field generating equipment such as motor ,
generator .

• For maintenance and checking purposes, leave sufficient space at the sides
and rear of the unit and leave slack in cables.

• A magnetic compass will be affected if placed too close to the display unit.
Observe the following compass safe distances to prevent disturbance to the
magnetic compass:

Standard compass: 0.98 meters
Steering compass: 0.74 meters

• Rubber cushions which absorb vibration (supplied) may be attached as below
if vibration is a problem.

45±5mm

Aline with edge
of hanger.

Rubber cushion
TM-166 No.18 black

1-1

Mounting procedure

Follow the procedure below to mount the display unit on a tabletop or the over­head.

Tabletop, overhead mounting

1. Fix the hanger by four tapping screws M5 X 16.

2. Screw knob bolts in display unit, set it to hanger, and tighten knob bolts.

3. Attach hard cover to protect LCD.

WARNING

Figure 1-2 Tabletop, overhead mounting of display unit

Flush mounting

Note:

11 to 14 mm. For bulkhead which exceeds 14 mm in thickness the length of the
pan head screws should be bulkhead thickness plus 7.3±1.5 mm. Also the length
of B below should max. 7 mm.

1. Prepare a cutout in the mounting location whose dimensions are as shown in

2. Fix the display unit by six pan head screws. Refer to the outline drawing on

Use supplied pan head screws when the thickness of the bulkhead is from

B

A

Figure 1-3.

page D-2.

1-2

Pan head screws

6-R2.25

Cutout for flush mount

242 0.5

244 1

89 0.5

147 0.5

Flush mount

Figure 1-3 Flush mounting of display unit

1.2 Installation of Antenna Unit

Mounting considerations

Install the antenna unit referring to the installation diagram on page D-3 or D-4.
When selecting a mounting location for the antenna unit, keep in mind the follow­ing points:

• Select a location out of the radar beam. The radar beam will obstruct or prevent
reception of the GPS satellite signal.

50

143 1

15 0.5

238 1

• The location should be well away from a VHF antenna. A GPS receiver is inter­fered by a harmonic wave of a VHF antenna.

• There should be no interfering object within the line-of-sight to the satellites.
Objects within line-of-sight to a satellite, for example, a mast, may block recep­tion or prolong acquisition time.

• Mount the antenna unit as high as possible. Mounting the antenna unit as high
as possible keeps it free of interfering objects and water spray , which can inter­rupt reception of GPS satellite signal if the water freezes.

• The length of the whip antenna for the GP-1850DF should be no longer than

1.2 meter to prevent antenna damage. Do not use a 2.5 meter whip antenna.

• If the antenna cable is to be passed through a hole which is not large enough to
pass the connector, you may unfasten the connector with a needle nose pliers
and 3/8-inch open-end wrench. Refasten it as shown in Figure 1-4 after run­ning the cable through the hole.

Washer

Clamp nut

Gasket (reddish brown)

Shield

Center pin (soldered)

Connector shell

Figure 1-4 How to assemble the connector

1-3

1.3 Installation of Transducers

Installing the inside-hull mount transducer

Necessary tools

You will need the following tools:

• Sandpaper (#100)

• Silicone sealant

Remarks on installation

• Do the installation with the boat hauled out of the water.

• Turn off the engine while installing the equipment.

• Install the transducer in the engine room.

Selecting the mounting location

Keep the following points in mind when selecting a mounting location:

• The mounting location should be where the hull is of single-hull thickness and
is void of air or flotation materials other than solid fiberglass between the trans­ducer face and the water.

• Do not place the transducer over hull struts or ribes which run under the hull.

• Avoid a location where the rising angle of the hull exceeds 15°, to minimize the
effect of the boat’s rolling.

• You will finalize the mounting location through some trial and error . The proce­dure for this is shown later.

15cm
15cm

1/2

1/3

Mounting location
for transducer

Center line

50cm

50cm

Figure 1-5 Inside-hull transducer mounting location

1-4

Attaching the transducer

1. Clean the transducer face to remove any foreign material. Lightly roughen the
transducer face with #100 sandpaper. Also, roughen the inside of the hull where
the transducer is to be mounted.

2. Warm the silicone sealant to 40°C before usage to soften it. Coat the trans­ducer face and mounting location with silicone sealant.

Transducer face

Silicone sealant

Figure 1-6 Coating the transducer face with silicone sealant

3. Press the transducer firmly down on the hull and gently twist it back and forth to
remove any air which may be trapped in the silicone sealant.

Squeeze out
air bubbles.

Hull

Silicone
sealant

Figure 1-7 Attaching transducer to hull with silicone sealant

1-5

Observing the picture

1. Press the [POWER] key to turn on the display unit.

2. Press the [SNDR] key to select the sounder display.

3. Press the soft key labeled "MODE/FREQ" to display the following message.

MODE/FREQ

▲
AUTO CRUISING

AUTO FISHING
MANUAL

▼

Figure 1-8 MODE FREQ selection screen

4. Select "MANUAL" by the arrow key.

5. Press the soft key labeled "RETURN".

6. Press the soft key labeled "GAIN" to display the following message.

GAIN

▲

50

HIGH

LOW
▼

Figure 1-9 GAIN adjustment screen

7. Confirm that Gain is set at 50 (midpoint).

8. Press the soft key labeled "RETURN".

9. Press the soft key labeled "RANGE".

10.Select "15ft" by the [▲] key.

11.Note the depth to the seabed.

1-6

°C
30

20

0.0

SOUNDER

RANGE

5

10

0

32.8

10

15

DGPS 3D 50kHz

Figure 1-10 Video sounder picture

If the bottom is displayed in red and the light-blue color appears the mounting
location is suitable. You can leave the transducer in position.

If the bottom is not displayed in reddish brown, the mounting location is unsuit­able. Relocate the transducer and do the following.

1. Press the [POWER] key to turn off the power.

2. Gently dismount the transducer with piece of wood.

3. Do steps 1 through 5 in the previous procedure. Repeat
until a suitable location is found.

GAIN

SHIFT

MODE/
FREQ

SNDR
FUNC

Final preparation

Support the transducer with a piece of wood to keep it in place wile it is drying. Let
the transducer dry 24–72 hours.

1-7

Installing the thru-hull mount transducer

Transducer mounting location

This type of mounting provides the best performance of all, since the transducer
protrudes from the hull and the effect of air bubbles and turbulence neat the hull
skin is reduced. When the boat has a keel, the transducer should be at least 30 cm
away from it. Typical through hull mountings are shown in the figure on the next
page.

The performance of the video sounder is directly related to the mounting location
of the transducer, especially for high-speed cruising. The installation should be
planned in advance, keeping the standard cable length (8 m) and the following
factors in mind:

• Air bubbles and turbulence caused by movement of the boat seriously degrade
the sounding capability of the transducer . The transducer should, therefore, be
located in a position where water flow is the smoothest. Noise from the propel­lers also adversely affects performance and the transducer should not be
mounted nearby. The lifting strakes are notorious for creating acoustic noise,
and these must be avoided by keeping the transducer inboard of them.

• The transducer must always remain submerged, even when the boat is rolling,
pitching or up on a plane at high speed.

• A practical choice would be somewhere between 1/3 and 1/2 of the boat's length
from the stern. For planing hulls, a practical location is generally rather far astern,
so that the transducer is always in water regardless of the planing attitude.

Transducer outline drawings

30

120

22

All dimensions
in millimeters

120

28

68

24

Ship's
bow

68 87

520-5PSD (option) 520-5MSD (option)

Figure 1-11 Transducer outline drawings

1-8

Acceptable transducer mounting locations

• Position 1/2 to 1/3 length of the hull from stern

• 15 to 30 cm off center line (inside first lifting strakes).

• Within the wetted bottom area

• Deadrise angle within 15°

Deep-V hull

Figure 1-12 Transducer mounting location on deep-V hull

High speed V-planing hull

Figure 1-13 Transducer mounting location on high speed

V-planing hull

Typical through-hull mount transducer installations

Flat washer

Fairing block

Rubber washer

Hull
bottom

Deep-V Hull Flat Hull

Figure 1-14 Typical through-hull mount transducer installations

Hull
bottom

1-9

Procedure for installing the thru-hull mount transducer

W

1. With the boat hauled out of the water , mark the location selected for mounting
the transducer on the bottom of the hull.

2. If the hull is not level within 15° in any direction, fairing blocks made out of teak
should be used between the transducer and hull, both inside and outside, to
keep the transducer face parallel with the water line. Fabricate the fairing block
as shown below and make the entire surface as smooth as possible to provide
an undisturbed flow of water around the transducer. The fairing block should be
smaller than the transducer itself to provide a channel to divert turbulent water
around the sides of the transducer rather than over its face.

Hole for
stuffing tube

Upper
half

Lower
half

Saw along slope of hull.

BO

Figure 1-15 Construction of fairing block

3. Drill a hole just large enough to pass the threaded stuffing tube of the trans­ducer through the hull, making sure it is drilled vertically.

4. Apply a sufficient amount of high quality caulking compound to the top surface
of the transducer , around the threads of the stuffing tube and inside the mount­ing hole (and fairing blocks if used) to ensure watertight mounting.

5. Mount the transducer and fairing blocks and tighten the locking nuts. Be sure
that the transducer is properly oriented and its working face is parallel to the
waterline.

Note:

Do not over-stress the stuffing tube and locking nuts through excessive tight­ening, since the wood block will swell when the boat is placed in the water. It is
suggested that the nut be tightened lightly at installation and retightened several
days after the boat has been launched.

1-10

Installing the transom mount transducer

This type of mounting is very commonly employed, usually on relatively small I/O
or outboard boats. Do not use this method on an inboard motor boat because
turbulence is created by the propeller ahead of the transducer.

There are two methods of installation: flush with hull (for flat hulls) and projecting
from hull (for deep V-hulls).

D

D>

50 cm

Flat Hull Deep V-hull

Figure 1-16 Transom mount transducer mounting locations

Installing the transom mount transducer flush with hull
(for flat hulls)

A suitable mounting location is at least 50 cm away from the engine and where the
water flow is smooth.

1. Drill four pilot holes in the mounting location.

2. Attach the transducer to the bracket with tapping screws (supplied).

3. Adjust the transducer position so the transducer faces right to the seabed.

Note:

If necessary, to improve water flow and minimize air
bubbles staying on the transducer face, incline the trans­ducer about 5° at the rear. This may require a certain amount
of experimentation for fine tuning at high cruising speeds.

4. Fill the gap between the wedge front of the transducer and transom with epoxy
material to eliminate any air spaces.

1-11

M5 x 20

M5 x 20

5°

Tape

No. 1

M5 x 14

Figure 1-17 Transom mount transducer, mounting flush with hull

Installing the transom mount transducer projecting from hull
(for deep-V hulls)

This method is employed on deep-V hulls and provides good performance be­cause the effects of air bubbles are minimal. Install the transducer parallel with
water surface; not flush with hull. If the boat is placed on a trailer care must be
taken not to damage the transducer when the boat is hauled out of the water and
put on the trailer.

M5 x 20

M5 x 20

No. 2

M5 x 14

Figure 1-18 Transom mount transducer, projecting from hull

T ransducer preparation

Before putting the boat in water, wipe the face of the transducer thoroughly with a
detergent liquid soap. This will lessen the time necessary for the transducer to
have good contact with the water. Otherwise the time required for complete "satu­ration" will be lengthened and performance will be reduced.

Do not paint the transducer. Performance will be affected.

1-12

Triducer 524ST -MSD, 525ST-MSD

The triducer is designed for thru-hull mounting.

Mounting considerations

When selecting a mounting location keep the following points in mind:

• Air bubbles and turbulence caused by movement of the boat seriously degrade
the sounding capability of the transducer. The transducer should, therefore, be
located in a position where water flow is the smoothest. Noise from the propel­lers also adversely affects performance and the transducer should not be
mounted nearby. The lifting strakes are notorious for creating acoustic noise,
and these must be avoided by keeping the transducer inboard of them.

• The transducer must always remain submerged, even when the boat is rolling,
pitching or up on a plane at high speed.

• A practical choice would be somewhere between 1/3 and 1/2 of the boat’ s length
from the stern. For planing hulls, a practical location is generally rather far astern,
so that the transducer is always in water regardless of the planing attitude.

∅79 mm

133 mm

2.00"-12 UN
threads

∅51 mm

27 mm

140 mm

7 mm

Figure 1-19 Dimensions of triducer 524ST-MSD/525ST-MSD

1-13

1.4 Installation of Sensors

Transom mount water temperature sensor
T-02MTB

• Fix the cable at a convenient location with cable clamp.

• When the cable is led in through the transom board, make a hole of approx. 17
mm diameter to pass the connector . After passing the cable, fill the hole with a
sealing compound.

D

D>50 cm

M5 x 20

Mount sensor
flush with hull bottom.

Figure 1-20 How to install transom mount water temperature sensor T-02MTB

1-14

Thru-hull mount water temperature sensor
T-02MSB, T-03MSB

• Select a mid-boat flat position. The sensor does not have to be installed per­fectly perpendicular. The sensor must not be damaged in dry-docking opera­tion.

• Select a place apart from equipment generating heat.

• Select a place in the forward direction viewing from the drain hole, to allow for
circulation of cooling water.

• Select a place free from vibration.

Mount the sensor as shown below.

Figure 1-21 Thru-hull mount water temperature sensors

T-02MSB, T-03MSB

1-15

Through-hull mount water temperature/speed sensor
ST-02MSB, ST-02PSB

Select a suitable mounting location considering the following:

• Select a mid-boat flat position. The sensor does not have to be installed per­fectly perpendicular. The sensor must not be damaged in dry-docking opera­tion.

• Select a place apart from equipment generating heat.

• Select a place in the forward direction viewing from the drain hole, to allow for
circulation of cooling water.

• Select a place free from vibration.

1. Dry-dock the boat.

2. Make a hole of approx. 51 mm diameter.

3. Unfasten locknut and remove the sensor section.

4. Apply high-grade sealant to the flange of the sensor.

5. Pass the sensor casing through the hole.

6. Face the notch on the sensor toward boat’s bow and tighten the flange.

7. Set the sensor section to the sensor casing and tighten the locknut.

8. Launch the boat and check for water leakage around the sensor.

Locknut

Face "notch"
toward bow.

Flange nut

Coat with
silicone sealant.

51

Brim

ø77

123

Figure 1-22 Water temperature/speed sensor ST-02MSB,

ST-02PSB

1-16

2. Wiring

All wiring are terminated at the rear of the display unit.

GPA-019
(GP-1850DFj

Antenna unit

GPA-018
iGP-1850DFj

GPA-017
iGP-1850Fj

Ground

Display unit (back)

ANT XDR

Temperature

TEMP/SPD

Speed/

(Option)

DGPS beacon receiver

(option for GP-1850F,

RS-232C only)

DGPS

External

equipment

Transducer

Figure 2-1 Display unit, rear view

NMEA

Black

+ GND

1 3

2

-

12 - 24

VDC

White

Earth terminal

Ground

Shield

Power cable

Connect the power cable to the power connector. Connect the leads to the battery
(12 or 24 VDC); white to plus(+) terminal and black to minus(-) terminal.

(5 A)

Figure 2-2 Connecting the power cable to the battery

2-1

Antenna unit

Connect the antenna cable to the ANT connector.

T ransducer

Connect the transducer cable to the XDR connector.

Water temperature/speed sensor

Connect the water temperature sensor (option) or water temperature/speed sen­sor (option) to the TEMP/SPD connector.

Ground

The display unit contains several
CPUs. While they are operating, they
radiate noise, which can interfere with
radio equipment. Ground the unit to
prevent interference. The grounding
wire should be 1.25 sq or larger and
as short as possible. Connect the
grounding wire to ship's ground. On a
fiberglass boat, it is best to install a ground plate that measures about 20 cm by 30
cm on the outside of the hull bottom to provide a ground point. If this is not practi­cal, the engine block can be used.

CAUTION

Ground the equipment to
prevent electrical shock
and mutual interference.

Also, the antenna unit GPA-018S (option) should be grounded.

Note:

use an “open-type” lug ( ).

Use a “closed” lug to make the ground connection at the display unit. Do not

2-2

Extending antenna cable length

The standard cable is 10m long. For extension, in case of the GPA-016, GP A-018
and GP A-018S, an antenna cable set of 15m (GPA-018S and GPA-019S), 30m or
50m is available. Extension cable cannot be used with the GPA-017 or GP A-018.

◆ Extension cable line-up (in case of 30 m or 50 m)
Fabricate the end of the antenna cable and attach the coaxial connector. De-

tails are shown on next page.

Antenna Unit
GPA-016
GPA-018S
GPA-019S

Conversion
Cable Assy.

: Connector

1 m

Antenna Cable

30 m or 50 m 1 m

Fabricate locally. (See next page.)

To display unit

Figure 2-3 Cable extension

◆ Waterproofing connector
Wrap connector with vulcanizing tape and then vinyl tape. Bind the tape end

with cable-tie.

Figure 2-4 Waterproofing connector

2-3

How to attach the N-P-8DFB connector

Outer Sheath

Cover with heat-shrink tubing and heat.

Armor

30

Clamp
Nut

Dimensions in millimeters.

Inner Sheath Shield

50

Gasket
(reddish
brown)

30

10

Clamp

Aluminum Foil

Remove outer sheath and armor by the dimensions
shown left.
Expose inner sheath and shield by the dimensions
shown left.

Cut off insulator and core by 10mm.

Twist shield end.

Ship on clamp nut, gasket and clamp as shown left.

Trim shield here.

Trim aluminum
tape foil here.

Clamp Nut

Insulator

1

5

Pin

Shell

Fold back shield over clamp and trim.

Cut aluminum foil at four places, 90° from one
another.

Fold back aluminum foil onto shield and trim.

Expose the insulator by 1mm.

Expose the core by 5mm.

Slip the pin onto the conductor. Solder them together
through the hole on the pin.

Insert the pin into the shell. Screw the clamp nut into
the shell.

Solder through
the hole.

(Tighten by turning the clamp nut. Do not tighten by
turning the shell.)

Figure 2-5 Fabrication of coaxial cable

2-4

3.1 NMEA Setting

NMEA port

1. Press the [MENU] key.

2. Press the software key labeled "CONFIGURATION".

3. Press the software key labeled "SETUP NMEA PORT 1".

4. Select "FORMAT" by the arrow key.

5. Press the software key labeled "EDIT" to display the following message.

3. Initial Setting

s FORMAT NMEA 0183

DGPS 3D

Figure 3-1 Output Format Display, NMEA port

6. Select NMEA version desired by the arrow key.

OUTPUT FORMAT

VER 1.5

▲

NMEA0183 Ver1.5
' NMEA0183 Ver2.0

▼

SETUP
PORT 1

ENTER

CANCEL

7. Press the software key labeled "ENTER".

8. Press the [PLOT] key to finish.

3-1

DGPS port

1. Press the [MENU] key.

2. Press the software key labeled "CONFIGURATION".

3. Press the software key labeled "SETUP NMEA/DGPS PORT 2".

4. Select "FORMAT" by the arrow key.

5. Press the software key labeled "EDIT" to display the following message.

s FORMAT NMEA 0183

DGPS 3D

OUTPUT FORMAT

▲

NMEA0183 Ver1.5

' NMEA0183 Ver2.0

RTCM104 (EXTRN)
RTCM104 (INTRN)

RTCM104 (OUTPUT)

▼

VER 1.5

▲▲▲

SETUP
PORT2

ENTER

CANCEL

Figure 3-2 Output Format Display, DGPS port

6. Select NMEA version, external DGPS or internal DGPS by the arrow key.
NMEA0183 Ver1.5/Ver2.0 : Select one when connecting PC or RS-232C

equipment.

RTCM104(EXTRN) : Select this when connecting external DGPS

beacon receiver.

RTCM104(INTRN) : Select this for builtin internal DGPS beacon

receiver.

RTCM104(OUTPUT) : Selecct this when outputting differential data of

the internal DGPS beacon receiver to other GPS
navigator.

Note 1) You cannot setup sentences when you select RTCM104 as the format.
Note 2) For RS-422 format, the level converter (IF-1432) is required for connection

of external equipment.

7. Press the software key labeled "ENTER".

8. Press the [PLOT] key to finish.

3-2

3.2 Output Data Sentences

Select output data sentences for external equipment as follows.

1. Press the [MENU] key.

2. Press the software key labeled "CONFIGURATION".

3. Press the software key labeled "SETUP NMEA PORT 1".

4. Press the software key labeled "SELECT SNTNC." to display the following list.

SELECT
SNTNC.

ON/OFF

s

SELECT SENTENCE

sAAM

APB ON
BOD
BWR
GGA
GLL ON
MTW
RMA
RMB ON
RMC ON
VTG ON
WPL
XTE
ZDA ON

DGPS 3D

RETURN

Figure 3-3 Output Date Sentences Display

5. Select data sentence you want to output data by the arrow key.

6. Press the software key labeled "ON/OFF". To output data, set to "ON".

7. Repeat to select other sentences.

8. Press the software key labeled "RETURN".

9. Press the [PLOT] key to finish.

Input/Output Sentences

troPO/ItamroFataDskrameR

tupnI

1

tuptuO

tupnI

2

tuptuO

3810-AEMN•

0.2.reV

5.1.reV
2611CEI•

3810-AEMN•

0.2.reV

5.1.reV

C232SR•

401MCTR•

.ylevitucesnoctupniebtonnaC:1*

1*LPW,MWD,1*LLTylnoreklatPG:LPW

2*DTG,WTM,TPD/TBD,ADZ,ETX

1*LPW,MWD,1*LLTylnoreklatPG:LPW

2*DTG,TPD/TBD,ADZ,ETX

.detcelessiALroCLnehwyllacitamotuatuptuO:2*

,AGG,RWB/CWB,DOB,BPA,MAA

,LPW,GTV,CMR,BMR,AMR,LLG

,AGG,RWB/CWB,DOB,BPA,MAA

,LPW,GTV,CMR,BMR,AMR,LLG

CWB:ELCRICTAERG
RWB:ENILBMUHR
TBD:5.1reVAEMN
TPD:0.2reVAEMN

CWB:ELCRICTAERG
RWB:ENILBMUHR
TBD:5.1reVAEMN
TPD:0.2reVAEMN

3-3

3.3 Antenna Height

1. Press the [MENU] key.

2. Press the software key labeled "GPS/DGPS/TD OPTIONS".

3. Press the software key labeled "GPS SETUP OPTIONS".

4. Select "ANT. HEIGHT" by the arrow key.

5. Press the software key labeled "EDIT" to display the following message.

Figure 3-4 Antenna Height Display

6. Enter the height (3 digits) of the antenna above sea level using the numeric
keys.

If you enter wrong antenna height, press the software key labeled "CLEAR".

ANT. HEIGHT

0 0 5 m

7. Press the [ENTER] key.

8. Press the [PLOT] key to return to finish.

3.4 Baud Rate Setting (GP-1850DF only)

This setting may not be done when AUTO MODE is selected.

1. Press the [MENU] key.

2. Press the software key labeled "GPS/DGPS/TD OPTIONS".

3. Press the software key labeled "DGPS SETUP OPTIONS" to display the fol­lowing message.

s FORMAT NMEA 0183

DGPS MODE ON
BEACON FREQUENCY AUTO

s

BEACON BAUD RATE AUTO

DGPS ALARM OFF

VER 1.5

DGPS
OPTION

EDIT

DGPS 3D

Figure 3-5 DGPS Setup Options Display

3-4

RETURN

4. Confirm that "ON" is selected at "DGPS MODE" field for GP-1850DF.

5. Select "BEACON BAUD RATE" by the arrow key.

6. Press the software key labeled "EDIT" to display the following message.

BEACON BAUD RATE

▲

200
' 100
50

▼

Figure 3-6 Beacon Baud Rate Display

7. Select beacon baud rate corresponding to DGPS reference station to use.

8. Press the [ENTER] key.

9. Press the [PLOT] key to return to finish.

3.5 Beacon Frequency Setting (GP-1850DF only)

1. Press the [MENU] key.

2. Press the software key labeled "GPS/DGPS/TD OPTIONS".

3. Press the software key labeled "DGPS SETUP OPTIONS" to display the fol­lowing message.

s FORMAT NMEA 0183

DGPS MODE ON
BEACON FREQUENCY AUTO

s

BEACON BAUD RATE AUTO

DGPS ALARM OFF

DGPS 3D

VER 1.5

DGPS
OPTION

EDIT

RETURN

Figure 3-7 DGPS Setup Options Display

3-5

4. Select "BEACON FREQUENCY" by the arrow key.

5. Press the software key labeled "EDIT" to display the following message.

BEACON FREQUENCY

▲

' AUTO
MANUAL s 284.0 kHz

▼

Figure 3-8 Beacon Frequency Display

6. Select "AUTO" or "MANUAL" by the arrow key. When you select "MANUAL",
operate the cursor pad to move the cursor to frequency dialog box. And press
the arrow key to select the frequency desired.

7. Press the [ENTER] key.

8. Press the [PLOT] key to finish.

3.6 Depth Adjustment

1. Press the [MENU] key.

2. Press the software key labeled "DISPLAY OPTIONS".

3. Press the software key labeled "NEXT PAGE".

4. Select "DEPTH ADJ." by the arrow key.

5. Press the software key labeled "EDIT" to display the following message.

Figure 3-9 Depth Adjustment Display

6. Set depth adjustment by the arrow key. The adjustment range is -9.9~+9.9 ft.
For example, if the depth readout from the draft to the transducer is 5 feet lower

than actual depth, enter +5 feet.

DEPTH ADJ

▲

+ 0.0 f t

▼

7. Press the software key labeled "RETURN".

8. Press the [PLOT] key to finish.

3-6

3.7 External Equipment Setup (Option)

This section shows you how to set up the GP-1850F/1850DF when external equip­ment is connected. If a water temperature/speed sensor is installed, you should
complete this section with the boat in the water and running, to confirm speed/
water temperature readout.

Speed Source

1. Press the [MENU] key.

2. Press the software key labeled "DISPLAY OPTIONS".

3. Press the software key labeled "NEXT PAGE" to display the following display.

s SPEED SOURCE GPS

TEMP SOURCE OWN XDCR
TEMP GRAPH OFF
ZOOM MARKER OFF
SPEED ADJ. +00%
TEMP ADJ. +00.0°F
DEPTH ADJ. +0.0ft

SPD

12.3kt

DGPS 3D

TEMP

62.5°F

DEPTH

2000.0ft

DISPLAY

SETUP2

EDIT

RETURN

Figure 3-10 Display Setup 2 Display

4. Select "SPEED SOURCE" by the arrow key.

5. Press the software key "EDIT" to display the following message.

SPEED SOURCE

▲

OWN PDDWHL
GPS

▼

Figure 3-11 Speed Source Display

6. Select source of speed by the arrow key; "OWN PDDWHL" (speed sensor) or
"GPS".
Adjust speed when you select "OWN PDDWHL". Refer to next page.

7. Press the software key labeled "ENTER".

8. Press the [PLOT] key to finish.

3-7

Speed Adjustment

Adjust speed when you select own speed source "OWN PDDWHL".

1. Press the [MENU] key.

2. Press the software key labeled "DISPLAY OPTIONS".

3. Press the software key labeled "NEXT PAGE" to display the following display.

s SPEED SOURCE GPS

TEMP SOURCE OWN XDCR
TEMP GRAPH OFF
ZOOM MARKER OFF
SPEED ADJ. +00%
TEMP ADJ. +00.0°F
DEPTH ADJ. +0.0ft

SPD

12.3kt

DGPS 3D

TEMP

62.5°F

DEPTH

2000.0ft

DISPLAY

SETUP2

EDIT

RETURN

Figure 3-12 Display Setup 2 Display

4. Select "SPEED ADJ." by the arrow key.

5. For speed sensor-equipped sets, you may offset the speed readout if it is wrong.
Run the boat at various speeds and watch the speed readout at the bottom of
the screen. If it is unreasonably wrong, press the software key "EDIT" to dis­play the following message.

SPEED ADJ

▲

+ 00 %

▼

Figure 3-13 Speed Adjustment Display

6. Correct speed readout by the arrow key. The adjustment range is -50%~+50%.
For example, if readout is 10% lower than actual speed, enter +10%.

7. Press the software key "RETURN".

8. Press the [PLOT] key to finish.

T emperature Adjustment

1. Press the [MENU] key.

2. Press the software key labeled "DISPLAY OPTIONS".

3. Press the software key labeled "NEXT PAGE" to display the following display.

3-8

s SPEED SOURCE GPS

TEMP SOURCE OWN XDCR
TEMP GRAPH OFF
ZOOM MARKER OFF
SPEED ADJ. +00%
TEMP ADJ. +00.0°F
DEPTH ADJ. +0.0ft

DISPLAY

SETUP2

EDIT

SPD

12.3kt

DGPS 3D

TEMP

62.5°F

DEPTH

2000.0ft

RETURN

Figure 3-14 Display Setup 2 Display

4. Select "TEMP ADJ." by the arrow key.

5. For water temperature sensor-equipped sets, you may offset the water tem­perature readout if it is wrong. Watch the water temperature readout at the
bottom of the screen. If it is unreasonably wrong, press the software key la­beled "EDIT" to display the following message.

TEMP ADJ

▲

+ 00.0 °F

▼

Figure 3-12 Temperature Adjustment Display

6. Correct water temperature readout by the arrow key. The adjustment range is

-99.9 ~+99.9 .
For example, if the readout is 2° higher than actual temperature, enter -2°.

7. Press the software key labeled "RETURN".

8. To display a water temperature graph (shows present water temperature), se­lect "TEMP GRAPH" by arrow key.

9. Press the software key labeled "EDIT" to display following message.

TEMP GRAPH

▲

ON
OFF

▼

Figure 3-13 Temperature Graph Display

10.Select "ON".

11.Press the software key labeled "ENTER".

12.Press the [SNDR] key to finish.

3-9

3.8 Selecting the Echo Sounder Output Power

The echo sounder output power can be selected for 600 W (for transducer 520­5PSD, 520-5PWD, 520-5MSD) or 1 kW (50/200-1T), and the default setting is 600
W.

Note: Matching Box MB-1000 and cable assembly 02S4092 are required for 1kW
transducer connection. For details, see the interconnection diagram at the end of
this manual.

Attach the TX power label (supplied) to the place shown below, and draw a line
through the power which you don't use by oil base magic marker.

Between
these fins

Attach TX POWER

Label to here.

Warning Label

Figure 3-14 Display unit, top view

To change to 1 kW power, do the following:

1. Turn of f the power. Wait at least one minute before opening the cover, to allow
capacitors to discharge.

2. Remove nuts attached to XDR, SPD/TEMP. DGPS, NMEA and power supply
connectors at the rear of the display.

3. Remove nut and washer attached to the ANT connector.

4. Remove ten binding screws (M3 x 10) from the rear of the display unit to sepa­rate the panel/chassis assembly from the cover assembly.

3-10

Binding screws
M3x10, 10 pcs.

Nuts

Nut, washer

Cover assembly

Panel/chassis assembly

Connector gasket

Figure 3-15 Removing cover assembly

WARNING

Do not connect the power
cable with the cover removed.

5. Move the jumper block on JP1 from 3-4 to 1-2 on the ANLG Board.

JP1

Figure 3-16 ANLG Board

3-11

6. Remount the cover assembly.

Note: Confirm that the following parts are attached:

• Inside of the cover: Shield gaskets, GN gasket (See Figure 3-17.)

• On ANLG Board: Connector gasket (See Figure 3-15.)

GN gasket

Shield gaskets

Figure 3-17 Inside of the cover

7. Tighten nuts to torque shown below and in the order shown in Figure 3-18.

No. 1 through No. 5 : 7.5 - 8 kgf/cm
No. 6 : 14 -16 kgf/cm

+ GND

1 3

2

-

5

12 - 24

VDC

ANT XDR

6

4

2

TEMP/SPD

1

DGPS

NMEA

3

Figure 3-18 Display unit, rear view

8. Tighten ten binding screws (M3 x 10) fixing the cover to torque of 7.5-8 kgf/cm.

3-12

4. Installation of DGPS Beacon Receiver (for GP-1850F)

The DGPS beacon receiver GR-7000A can be incorporated in the GP-1850F to provide it
with DGPS capability. Six installation kits are available as shown.

GR-802-1650-10A-018 (W/whip ant.) GR-802-1650-15A-018S (W/whip ant.)
GR-802-1650-10N-018 GR-802-1650-15N-018S

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Disassembly

Procedure

1. Turn of f the power. Wait at least one minute before opening the cover, to allow
capacitors to discharge.

2. Remove nuts attached to DGPS, NMEA and power supply connectors at the
rear of the display unit.

Nut, washer

Nuts

Binding screws
M3x10, 10 pcs.

Cover assembly

Connector gasket

Panel/chassis assmbly

WARNING

Do not connect the power
cable with the cover
removed.

Figure 4-1 Removing cover assembly

3. Remove nut and washer attached to ANT connector.

4. Remove ten screws at rear of the display unit to detach panel/chassis assem­bly from the cover assembly.

4-2

Installation of DGPS receiver

Procedure

1. Dismount chassis assembly from panel/chassis assembly by disconnecting the
connector and PH8P from J8 on MAIN Board shown in the figure below.

ANLG Board
14P0313B

Panel assembly

View

A

Remove
two ties.

Cable w/8P
connector

J7

A

Connector

J8

MAIN Board
14P0311B

(P)MAIN

Figure 4-2 Dismounting chassis assembly

2. Dismount heat sink from chassis assembly by unfastening three screws on the

ANLG board, loosening two screws at TR fixing plates and disconnecting the
connector of the mini pin coaxial cable.

ANLG Board

Screws (3 X 8), 3pcs.

Mini pin
coaxial cable

Figure 4-3 Chassis assembly

Heat Sink

TR fixing plate

4-3

Handling of Coaxial Cable

• Do not touch the connector with bare hands;
use gloves.

• Use radio pincers to remove, and pull out
straightly.

• Plug in connector straightly.

3. Fasten the GR-7000A (DGPS beacon receiver) to the heat sink with four 3X8
screws as shown in the figure below.

Screws (3 X 8), 4pcs.

DGPS Beacon receiver
GR-7000A

GN-7707

Figure 4-4 Installation of DGPS beacon receiver

4. Open the cover of GR-7000A to connect two coaxial cables shown below.

J2

J1

Mini pin coax. cable

J3

Piece of shrink tubing

Cable Assy.
S.FL2-2LP0.7-D-WHT (250) (Supplied with DGPS kit)

From GN-7707

Figure 4-5 Connecting the coaxial cables in GR-7000A

5. Close the cover of GR-7000A passing the two cables out through respective
notches in the cover.

6. Plug PH6P-W-L240 connector to J2 on the GR-7000A through the cover.

4-4

7. Wire cable assembly as shown in the figure below.

Reattach this tape as
shown right after the
DGPS connection.

To J8 of
ANLG Board

GN-7707

J2

GR-7000A

J1

J3

J2

Connector
PH6P-W-L240

Figure 4-6 Wiring the Cable assembly

8. Mount the ANLG board on the heat sink referring to step 2. Fasten cable assy.
S.FL2-2LP0.7-D-WHT (250), 8P connector cable and 6P connector cable by
cable tie (CV-100, supplied) as shown in the figure below. Fix cable assy. S.FL2­2LP0.7-D-WHT (250) with vinyl tape.

8P connector

40 to 45 mm

Cable
tie

MAIN Board
ANLG Board

J8

10 mm

6P connector

40 to 45 mm

10 mm

vinyl tape

GN-7707

Figure 4-7 Attaching cable tie

9. Connect J1 of GR-7000A to J8 of ANLG board (Refer to Figure 4-6).

10.Mount chassis assembly on the panel assembly. Connect 8P connector and 6P
connector to Main board as shown in Figure 4-8.

4-5

A

view

8P connector
to J8

A

MAIN Board
14P0311B

ANLG Board
14P0313B

Connector

Panel assembly

J8

6P connector
to J7

J7

Figure 4-8 Attaching chassis assembly

11.Reassemble the display unit.

Nut
Washer

(Torque:

1.37-1.57 N•m)

Figure 4-9 Remounting the cover

Panel
Assembly

Nuts
(Torque: 0.74-0.78 N•m)

Binding screws
M3x10, 10 pcs.

(Torque: 0.74-0.78 N•m)

Cover assembly

Note :

When reattaching the cover, confirm the following parts are attached.

• Inside of the cover : Shield gaskets, GN gasket (See Figure 4-10.)

• On ANLG Board : Connector gasket (See Figure 4-1.)

4-6

GN gasket

Shield gaskets

Figure 4-10 Inside of the cover

Checking the DGPS installation

1. Press the [MENU] key.

2. Press the software key labeled "CONFIGURATION".

3. Press the software key labeled "SYSTEM MENU".

4. Press the software key labeled "SELF TEST".

5. Press the software key labeled "MEMORY•I/O TEST" to display the following
message.

TEST

PROGRAM : OK

NO. 14518310XX

SRAM : OK

DRAM : OK

PORT1 : OK*
PORT2 : OK*

INTERNAL
BATTERY : OK

GPS
RECEIVER : OK

NO. 48502060XX

BEACON
RECEIVER : OK

NO. 0850182-0XX
NO.

RETURN

*: Special connections are required to check these port.
Otherwise, "--" (bar) appears.

Figure 4-10 Memory, I/O Test Display

6. Confirm that "BEACON RECEIVER: OK" is displayed.

7. Press the soft key labeled "RETURN".

8. Press the [PLOT] key to return the plotter display.

4-7

APPENDIX
TRIDUCER 525ST-PWC/PWD

This appendix provides a copy of the installation instructions for AIRMAR triducer. If you
loose the original supplied with the triducer, use this appendix.

INSTALLATION INSTRUCTIONS

Transom Mount Transducer or TRIDUCER®
Multisensor with Integral Release Bracket

U.S. Patents: 4,555,938; 4,644,787; 5,606,253; Des. 334,335

Model P66

Canadian Patent 1,233,341

IMPORTANT Please read the instructions completely before
proceeding with the installation. These directions supersede
any other instructions in your instrument manual if they differ.

Applications

• Powerboats with outboard, inboard, inboard/outboard, or jet drive.

Not recommended for boats with large or twin screw inboard motor.

• Bracket protects the sensor form frontal impact only

• Good operation up to 44kn (50MPH)

• Orients the sound beam vertically on hulls with a

deadrise angle up to 30°

• Adjusts to transom angles from 2-22°

Tools and Materials Needed

Scissors
Masking tape
Safety goggles
Dust mask
Electric drill
Drill bit for:

Bracket holes 4mm, #23, or 9/64”
Fiberglass hull chamfer bit (preferred), 6mm, or 1/4”
Transom hole 19mm or 3/4” (optional)

Cable clamp holes 3mm or 1/8”
Screwdrivers
Straight edge
Marine sealant
Pencil
Zip-ties
Water-based antifouling paint (mandatory in salt water).

Pre-test for Speed and Temperature

Connect the sensor to the instrument and spin the paddlewheel. Check
for a speed reading and the approximate air temperature. If there is no
reading, return the sensor to your place of purchase.

Mounting Location

To ensure the best performance, the sensor must be submerged in
aeration-free and turbulence-free water. Mount the sensor close to the
centerline of the boat. On slower heavier displacement hulls, positioning
it farther from the centerline is acceptable.

Allow adequate space above the bracket for it to release and rotate the
sensor upward (see Figure 1).

Caution: Do not mount the sensor in an area of turbulence or bubbles:
Near water intake or discharge openings;
Behind strakes, struts, fittings, or hull irregularities;
Behind eroding paint (an indication of turbulence).

Caution: Avoid mounting the sensor where the boat may be supported
during trailering, launching, hauling, and storage.

• Single drive boat—Mount on the starboard side at least 75mm
(3”) beyond the swing radius of the propeller (see Figure 2).

• Twin drive boat—Mount between the drives.

Height without
speed sensor
191mm (7-1/2")

Height with
speed sensor
213mm (8-1/2")

Figure 1. Height required at mounting location

height

75 mm(3")
minimum beyond
swing radius

Figure 2. Mounting location on single drive boat

AP-1

APPENDIX TRIDUCER 525ST-PWC/PWD

P66 Installation template

for starboard side of boat

Drill at locations labeled "B"

for the following transom angles:

16° through 22°

BB B
AA A

Drill at locations labeled "A"

for the following transom angles:

2° through 15°

Align arrow with bottom of transom

Align template vertically

deadrise angle

Caution: Never Use Solvents!

Cleaners, gasoline, paint, sealants, and other products may contain
strong solvents such as acetone which can attack many plastics
dramatically reducing their strength.

Installation

Bracket

1. Cut out the installation template shown on the left.

2. At the selected location, position the template, so the arrow at the
bottom is aligned with the bottom edge of the transom. Being sure
the template is parallel to the waterline, tape it in place
(see Figure 3).

Warning: Always wear safety goggles and a dust mask.

3. Using a 4mm, #23, or 9/64” bit, drill three holes 22mm (7/8”) deep
at the locations indicated. To prevent drilling too deeply, wrap
masking tape around the bit 22mm (7/8”) from the point.
Fiberglass hull—Minimize surface cracking by chamfering the
gelcoat. If a chamfer bit or countersink bit is not available, start
drilling with a 6mm or 1/4” bit to a depth of 1mm (1/16”).

4. If you know your transom angle—The bracket is designed for a
standard 13° transom angle.

11°-18° angle—No shim is required. Skip to “Adjusting”, step 3.
Other angles—The shim is required. Skip to “Adjusting”, step 2.

If you do not know the transom angle—Temporarily attach the

bracket and sensor to the transom to determine if the plastic shim is
needed.

5. Using the two #10 x 1-1/4” self-tapping screws, temporarily screw
the bracket to the hull. Do not tighten the screws completely at this
time. Follow the instructions for “Attaching the Sensor to the
Bracket”, steps 1-4 before proceeding with “Adjusting”.

Figure 3. Template position

Step 1 Step 4Step 3Step 2

latch

retaining
cover

slope of hull

parallel to
waterline

Align template arrow with
bottom edge of transom

pivot
arm (2)

slot (2)

Figure 4. Attaching the sensor to the bracket

Adjusting

1. Using a straight edge, sight the underside of the sensor relative to
the underside of the hull. The stern of the sensor should be
1-3mm (1/16-1/8”) below the bow of the sensor or parallel to the
bottom of the hull (see Figure 5).

Caution: Do not position the bow of the sensor lower than the
stern because aeration will occur.

AP-2

2°-10° transom angle 19°-22° transom angle

shim with
taper down

angle
reversed

Figure 5. Sensor angle adjustment on transom

2. To adjust the sensor’s angle relative to the hull, use the tapered
plastic shim provided. If the bracket has been temporarily fastened
to the transom, remove it, Key the shim in place on the back of the
bracket.
2°-10° transom angle (stepped transom and jet boats)—Position
the shim with the tapered end down.
19°-22° transom angle (small aluminum and fiberglass boats)—
Position the shim with the tapered end up.

3. If the bracket has been temporarily fastened to the transom,
remove it. Apply a marine sealant to the threads of the two
#10 x 1-1/4” self tapping screws to prevent water seeping into the
transom. Screw the bracket to the hull. Do not tighten the screws
completely at this time.

4. Repeat step 1 to ensure that the angle of the sensor is correct.

Caution: Do not position the sensor farther into the water than
necessary to avoid increasing drag, spray, and water noise and
reducing boat speed.

5. Using the vertical adjustment space on the bracket slots, slide the
sensor up or down to provide a projection of 3mm (1/8”). Tighten
the screws (see Figure 6).

11° transom angle

NO SHIM

YES YESYES

parallelparallel parallel

12-18° transom angle

NO SHIM

YES NONO

slight
angle

shim with
taper up

angle
too steep

APPENDIX TRIDUCER 525ST-PWC/PWD

Cable Routing

Route the sensor cable over the transom, through a drain hole, or
thorough a new hole drilled in the transom above the waterline.

Caution: Never cut the cable or remote the connector; this will void the
warranty.

Warning: Always wear safety goggles and a dust mask.

1. If a hole must be drilled, choose a location well above the waterline.
Check for obstructions such as trim tabs, pumps, or wiring inside
the hull. Mark the location with a pencil. Drill a hole through the
transom using a 19mm or 3/4” bit (to accommodate the connector).

2. Route the cable over or through the transom.

3. On the outside of the hull secure the cable against the transom
using the cable clamps. Position a cable clamp 50mm(2”) above the
bracket and mark the mounting hole with a pencil (see Figure 6).

4. Position the second cable clamp halfway between the first clamp
and the cable hole. Mark this mounting hole.

5. If a hole has been drilled in the transom, open the appropriate slot
in the transom cable cover. Position the cover over the cable where
it enters the hull. Mark the two mounting holes.

6. At each of the marked locations, use a 3mm or 1/8” bit to drill a
hole 10mm (3/8”) deep. The prevent drilling too deeply, wrap
masking tape around the bit 10mm (3/8”) from the point.

7. Apply marine sealant to the threads of the #6 x 1/2” self-tapping
screw to prevent water from seeping into the transom. If you have
drilled a hole through the transom, apply marine sealant to the
space around the cable where it passes through the transom.

8. Position the two cable clamps and fasten them in place. If used,
push the cable cover over the cable and screw it in place.

9. Route the cable to the instrument being careful not to tear the cable
jacket when passing it though the bulkhead(s) and other parts of the
boat. To reduce electrical interference, separate the sensor
cable from other electrical wiring and “noise” sources. Coil any
excess cable and secure it in place with zip-ties to prevent damage.

10. Refer to your echosounder owner’s manual to connect the sensor
to the instrument.

cable cover

cable clamp

Attaching the Sensor to the Bracket

1. If the retaining cover near the top of the bracket is closed, open it by
depressing the latch and rotating the cover downward
(see Figure 4).

2. Insert the sensor’s pivot arms into the slots near the top of the
bracket.

3. Maintain pressure until the pivot arms click into place.

4. Rotate the sensor downward until the bottom snaps into the
bracket.

5. Close the retaining cover to prevent the accidental release of the
sensor when the boat is underway.

Hull projection
3mm (1/8")

Figure 6. Vertical adjustment and cable routing

50mm (2")

AP-3

Connecting DGPS beacon receiver

A DGPS beacon receiver whose output format is RS-232C can be connected to
the GP-1850F.

Below is the example of interconnection between the GP-1850F and FURUNO
beacon receiver GR-80.

GP-1850F

Figure 4-11 Connecting DGPS beacon receiver

DGPS

RD

SD
SG

1
2
3
4
5
6
7

Can use MJ-A7SPF0003-050
(OPTION).

YELLOW

RED

BLUE

GR-80

(setting RS-232C)

1

3
7

DATA

TD-B

RD-B
GND

4-8