Furuno CI-80 User Manual

DOPPLER SONAR

CURRENT INDICATOR

CI-80

A

(

C

9-52, Ashihara-cho,
Nishinomiya, Japan

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

ll rights reserved.

Printed in Japan

Your Local Agent/Dealer

FIRST EDITION : FEB. 1995
F : JAN. 6, 2001

PUB. No. OME-72390

CI-80

DAMI)

SAFETY INSTRUCTIONS

WARNING

ELECTRICAL SHOCK HAZARD

Do not open the equipment.

Only qualified personnel
should work inside the
equipment.

Immediately turn off the power at the
switchboard if water leaks into the
equipment or something is dropped in
the equipment.

Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.

Do not disassemble or modify the
equipment.

Fire, electrical shock or serious injury can
result.

Do not place liquid-filled containers on
the top of the equipment.

Fire or electrical shock can result if a liquid
spills into the equipment.

Immediately turn off the power at the
switchboard if the equipment is emitting
smoke or fire.

WARNING

Keep heater away from equipment.

A heater can melt the equipment’s power
cord, which can cause fire or electrical
shock.

Use the proper fuse.

Fuse rating is shown on the equipment.
Use of a wrong fuse can result in equip­ment damage.

Do not operate the equipment with wet
hands.

Electrical shock can result.

CAUTION

A warning label is attached to the
equipment. Do not remove the label.
If the label is missing or damaged,
contact a FURUNO agent or dealer.

WARNING

To avoid electrical shock, do not
remove cover. No user-serviceable
parts inside.

Name: Warning Label (1)
Type: 86-003-1011-0
Code No.: 100-236-230

Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.

Make sure no rain or water splash leaks
into the equipment.

Fire or electrical shock can result if water
leaks in the equipment.

i

Table of Contents

PRINCIPLE OF MEASUREMENT................................................................................ 1

PRINCIPLE OF MEASUREMENT, FEATURES.................................................................................. 1

TIDE, NAV-TIDE & TIDE DIFFERENTIAL ..........................................................................................4

IMPORTANT NOTICE ON TIDE MEASUREMENTS.......................................................................... 8

Features ............................................................................................................................................10

SYSTEM OVERVIEW..................................................................................................11

Control Description............................................................................................................................ 11

How to Read the Displays................................................................................................................. 13

MAIN MENU DESCRIPTION...................................................................................... 16

DEP Menu.........................................................................................................................................16

ECHO Menu......................................................................................................................................17

TRK Menu .........................................................................................................................................17

MARK Menu......................................................................................................................................18

AVR Menu .........................................................................................................................................18

OPERATION............................................................................................................... 19

Basic Operating Procedure...............................................................................................................19

Setting Tide Measuring Depths on the Echo Display........................................................................ 22

Setting up the Echo Display.............................................................................................................. 23

Setting up the Course Plot Display ...................................................................................................24

Marks ...............................................................................................................................................25

Calculating Trip Distance................................................................................................................... 26

Calibrations (offsets) .........................................................................................................................26

Water Speed Display Setting.............................................................................................................27

Nav Data Setting...............................................................................................................................28

MAINTENANCE & TROUBLESHOOTING................................................................. 29

Preventive Maintenance.................................................................................................................... 29

Troubleshooting.................................................................................................................................30

Self Tests, Demonstration Display..................................................................................................... 31

Self T e st Results................................................................................................................................33

MENU TREE............................................................................................................... 36

SPECIFICATIONS.................................................................................................. SP-1

ii

PRINCIPLE OF MEASUREMENT

PRINCIPLE OF MEASUREMENT, FEATURES

When a moving vessel emits an acoustical pulse into the water
at an angle, a portion of emitted energy is reflected from the
seabed and other microscopic objects in the sound path, such
as plankton or air bubbles. The frequency of the received
signal is shifted from the transmitted frequency in proportion to
relative velocity between the vessel and underwater reflecting
objects. This is called Doppler Effect.

The CI-80 calculates and displays movements of ship and
currents at specific depths by measuring Doppler shifts
obtained from three separate directions.

Planktonic layer

Seabed

Figure 1

Frequency of reflected signal is
shifted in proportion to relative speed
between the vessel and reflecting
objects.

Ship’s Speed (Here, speed is a vector value including velocity and direction.)

Depending on the base of measurement, ship’s speed is
expressed in two ways:

Ground tracking speed: Ship’s speed and course relative to
(Absolute speed) seabed (fixed base)

Water tracking speed: Ship’s speed and course relative to
(Relative speed) water layer just below the vessel

(floating base)

Nav-aided speed: Ship’s speed and course obtained
(Absolute speed) by external navigation equipment

(GPS)

1

GPS satellites

Water tracking speed

Nav-aided speed
(Pseudo ground tracking speed)

Near-surface layer

Tide

Ground tracking speed

Fixed

:Base of measurement

Figure 2

Tide is movement of watermass at a particular depth.
To know absolute tide (speed on ground), the following two

data are required:

1

Ship’s speed and course based on ground

2

Ship’s speed and course based on measuring layer (A)

Absolute tide is, then, given as a difference of these two speed
vectors.

2

Absolute Tide =

1

–

2

Layer (A)

1

Fixed

:Base of
measurement

Figure 3

2

Nav Tide

Nav-Tide is an absolute movement o f watermass at a particular
depth, taking speed information from the external navigator
(GPS) as a pseudo ground tracking speed.

To calculate Nav-tide, the following two data are required:

1

Ship’s speed and course obtained by external navigation
equipment (GPS)

2

Ship’s speed and course based on measuring layer (A)

Nav-tide is, then, given as a difference of these two speed
vectors.

2

Absolute Tide =

GPS satellites

1

–

1

Nav-aided speed

(Pseudo ground tracking speed)

Tide Differential

2

Water tracking

speed

:Base of measurement

Layer (A)

Figure 4

Tide differential is a relative movement of tides at different
depths, layer (A) and layer (B).

To calculate tide differential, the following two data are used:

1

Ship’s speed and course based on layer (A)

2

Ship’s speed and course based on layer (B)

Tide differential between two layers is, then, given as a
difference of these two speed vectors.

3

Tide Difference = 1 - 2 (Movement of layer B based on

layer A)

or

2

- 1 (Movement of layer A based on

=

layer B)

1

Layer (A)

2

Layer (B)

Figure 5

TIDE, NAV-TIDE & TIDE DIFFERENTIAL

Tide (Absolute tide)

Absolute tide can be measured in the ground tracking mode.

10 NM (1 hour trip)

Start of
trip

(Moving at 10 kt on ground)

Layer A

1

(Moving at 3 kt on ground)

2

:Base of measurement

End of
trip

:Base of
measurement

Fixed

Figure 6

Assume that the ship and layer A are moving in the same
direction, and ship’s speeds based on ground (Vg) and on lay er
A (Vwa) are measured as;

Vg = 10 kt (Ship’s speed based on ground)
Vwa = 7 kt (Ship’s speed based on layer A).

4

Nav-Tide (Absolute tide)

Tide Differential

Speed of layer A based on ground (C1) can be calculated as
follows:

C1 = Vg – Vwa

= 10 – 7
= 3 (kt)

Absolute tide can be measured in the nav-aided mode.
Nav-aided ship’s speed (Vn) is equivalent to ship’s ground

tracking speed in the ideal conditions. That is, the nav-tide can
be calculated by simply replacing Vg with Vn in the above
equation.

Tide differential is a relative movement of tides at different
depths.

Start of
trip

Layer A

Layer B

2

(Moving)

(Moving)

2 kt

It can be measured in the ground tracking, water tracking and
nav-aided modes.

10 NM (1 hour trip)

End of
trip

3

:Base of measurement

5 kt

Figure 7

5

Assuming that the ship, layer A and layer B are moving in the
same direction, and ship’s speeds based on layer A (Vwa) and
on layer B (Vwb) are measured as;

Vwa = 8 kt (Ship’s speed based on layer A)
Vwb = 5 kt (Ship’s speed based on layer B)

Tide differential calculations in ground tracking mode

As an absolute ship’s speed (Vg) is available in the ground
tracking mode, tide speeds of layer A (C1) and layer B (C2)
based on ground are calculated as follows:

C1 = Vg - Vwa (Speed of layer A based on ground)
C2 = Vg - Vwb (Speed of layer B based on ground)

Thus, the tide differential (Cd) between layer A and layer B is;

Cd = C2 - C1

= (Vg - Vwb) - (Vg - Vwa)
=Vwa - Vwb
=8 - 5
= 3 (kt)

or

Cd = C1 - C2

= (Vg - Vwa) - (Vg - Vwb)
= Vwb - Vwa
= 5 - 8
= -3 (kt)

In the water tracking mode, watermass just below the
transducer (near-surface layer) is taken as the base of all
measurements (virtual ground). Therefore, the ship and tide
speeds in the water tracking mode are not absolute but relative
to this near-surface layer.

Tide differential based
on layer A

Speed of layer B
viewed from layer
A

Tide differential based
on layer B

Speed of layer A
viewed from layer
B

Vw = 9 kt (Ship’s speed based on near-surface layer)
Vwa = 8 kt (Ship’s speed based on layer A)
Vwb = 5 kt (Ship’s speed based on layer B)

6

Start of
trip

Near­surface
layer

10 NM (1 hour trip)

21

3

End of
trip

Layer A

Layer B

1 kt

:Base of measurement

Assume that the ship and all measuring layers
are moving in the same direction, but at different
speeds.

2 kt

5 kt

Figure 8

7

[READ THIS FIRST!!]

IMPORTANT NOTICE ON TIDE MEASUREMENTS

(In the nav-aided mode, tide accuracy depends heavily on gyro
accuracy.)

SETTING SHIP’S HEADING

The CI-80 has the nav-aided mode to measure absolute tides
even in deep waters where ground tracking is unattainable. To
achieve reliable measurements, however, you must supply
accurate heading (gyro) information and ship’s position (or
speed/course) data to the CI-80.

If you are going to use the nav-aided mode, set the reading of
the AD converter (gyro interface) exactly w i th that of the master
gyrocompass.

Procedure

Master
Gyrocompass

1. Confirm that the gyrocompass has settled and all the
necessary compensations (latitude compensation, weather
compensation, etc.) are made correctly.

2. Operate the AD converter to obtain the same reading as
you read on the master gyrocompass. (Do not make
adjustment while the ship is turning.)

AD Converter

(Gyro Interface)

Figure 9

If the gyro reading is accurate, the CI-80 should provide
accurate tide information. If the gyro data contains some error,
however, you may see the following symptoms.

• Set/drift information on the nav-aided mode differs from that

on the ground-tracking mode.

• Tide/tide differential information on the nav-aided mode

differs from that on the ground-tracking mode.

8

20

10

0

10

20

20

10

0

10

20

1°

0.2

kt

GT Mode

-3°

0.5

kt

NAV Mode

GT Mode NAV Mode

Figure 10

9

Features

The CI-80 mainly consists of three units: a display unit, a
transceiver unit, and a transducer, each compact enough to fit
on small boats.

The main featu res of t he CI-80 are;

• Even in deep waters where ground (bottom) reference is

not available acoustically, the CI-80 can provide absolute
movements of measuring layers by receiving position (or
speed) data from GPS navigator and heading data from
gyro compass. It may be used on deep sea fishing boats or
on ocean research vessels.

• Triple-beam system for automatic compensation against

pitching and rolling of vessel.

• Single mold transducer for excellent mechanical beaming

accuracy.

• DC powered for economic operation.

• Alphanumeric information display on high resolution 10 inch

color CRT.

• Simultaneous display of tide vectors and ship’s track.

Indispensable for maneuvering and docking.

• Echo level display constantly displays underwater

conditions of three sounding beams.

• Target point feature predicts flow of objects (for example,

fishing tackle) against tide.

• Easy-to-follow menu operation for control of various

settings and measuring conditions.

10

Control Description

g

t

Display unit (CI-800)

SYSTEM OVERVIEW

Figure 11 Display unit

Transceiver unit (CI-810)

ure 12 Transceiver uni

Fi

11

Table 1 Control descript ion

Control Description

0

BRLL

DISP

MODE

MODE

MENU

ON

OFF

Turns the system on/off.

Adjusts brilliance of display. Setting can be locked by pushing in
control.

10

Alternately selects echo display and course plot display.

Selects tracking mode among ground tracking, water tracking, nav
aided and automatic selection.

(G) (W) (A)

Select "T/D" or "NAV" from the item
WATER SPEED on the SYSTEM menu.

(G) (N) (A)

Opens/closes the menu.

CURSOR

ON/OFF

EVENT

TRIP

Select menu.

In menu operation, select menu items; change settings; enter
data. On the course plot display, shift cursor.

Turns cursor on/off.

Enters event mark. Also activates self tests and demonstration
display and register calibrations.

Calculates trip distance. Also enables system menu, when
pressed and held down while pressing the MENU key.

12

TARGET

POINT

Inscribes target point mark, to predict flow of object (for example,
fishing tackle) against tide.

How to Read the Displays

The CI-80 has two display modes: echo display and course plot
display.

A display may be selected with the DISP MODE key.

Echo display

Figure 13 Sample echo display

13

When speed or depth data appears in red…

Speed or depth data containing error appears in red.

Ships speed Cannot find reference echo in respective tracking mode.
Tide speed Cannot find echo in given layer.
Set depth Depth set is invalid. In ground tracking mode, depth should be shallower

than 7 m, or in the water tracking mode no more 3/4 of seabed depth.

Measured speed When measured speed (tide or ship's) is unreliable.

Course plot display

14

Figure 14 Sample course plot display

NOTE 1: Ship's course and heading displays can be switched

with display mode as follows, by a DIP switch in the
display unit.

NOTE 2: Ship's speed and course displays are update every

three seconds, in the default setting. They can be
updated every second. For details, consult your
dealer.

15

MAIN MENU DESCRIPTION

Most major functions of the CI-80 are carried out through an
easy-to-follow menu system. The menu system consists of two
main groups of menus: main (operation) and system (testing,
calibration). This chapter covers the main menu. For complete
menu tree, see page 36.

Basic Menu Operation

Most major functions of the CI-80 are carried out through an easy-to-follow menu system.
Two general types of menus are used: main (operation) and system (testing).

Opening/closing the menu: Press the MENU key.
Selecting menus: Press ◄ /
Selecting menu items: Press
Selecting menu options, changing settings: Press

►.

/ .

DEP Menu

This menu sets both the measuring depths for three layers and
the reference layer for tide differential calculation.

LAYER 1, LAYER 2, LAYER 3: Depth for measuring layers 1, 2
and 3 can be set between 2 and 250 meters, in resolution of
one meter.

REF TIDE DIFFERENCE: Selects tide layer to be used
reference layer in tide differential calculation.

NOTE: The depth of each layer may be set as you like; layer

number does not necessarily correspond to depth in
ascending order.

/ .

Figure 15 DEP menu

16

ECHO Menu

Figure 16 ECHO menu

Sets up the echo display.
SPEED RANGE: Sets length of tide speed vector between 0.1

and 15.0 knots, in resolution of 0.1 knots.
ECHO DEPTH RANGE: Sets echo depth range. Depth can be

set either manually between 50 and 300 meters in resolution of
50 meters or automatically. In AUTO, seabed depth is
automatically selected as depth range.

ECHO LEVEL SHIFT: Sets echo intensity level, between 1 and
100 in resolution of 1. The higher the figure the stronger the
echo level.

NOTE: ECHO LEVEL SHIFT is not related to amplifier gain; it

does not affect detection of tide speed or ship’s speed.

TRK Menu

Sets up the course plot display.
PLOT RANGE: Sets latitude and longitude range of course plot,

between 0.1 and 5.0 miles in resolution of 0.1 mile.
PLOT MODE: You may select either Head-up (bow at top of

display) or North-up (North at top of display) orientation.
TRACK DISPLAY: Turn on/off trackline display.

17

MARK Menu

Figure 18 MARK menu

This menu sets measuring conditions for tide vector and target
point mark.

PRESET REFERENCE VALUE: Sets the effect of tide on the
target point mark. The higher the figure, the greater the effect
of tide.

TIDE HISTORY: Sets tide vector plotting interval, among 0
(turns off tide vector display), 15 sec. (1/4 min.), 1 min., 5 min.,
10 min., 30 min., and 60 min.

AVR Menu

Figure 19 AVR menu

The AVR (Averaging) sets averaging time for measuring raw
speed, tide and water tracking data, to smooth out random
variation of data.

SHIP SPD AVR: Raw speed data (from connected sensor) may
change randomly due to receiving conditions, etc. If speed data
varies greatly increase speed averaging. Speed averaging is
available in times of 15 sec., 30 sec., 60 sec., and 90 sec. The
default setting is 15 sec., which is suitable for most conditions.

TIDE AVERAGE: Direction and speed of a tide changes with
time, place and depth. Therefore it is important that the current
indicator not respond to quickly or too slowly to tide movement.
Tide averaging time is available between 0 and 5 minutes in
the nearest minute. (“0” is for use of raw tide data.) In most
cases “2 min.” provides excellent results. Too high a setting
may prevent detection of rapid changes in tide movement, such
as a current rip.

18

WT SPD DEPTH: Sets measuring depth of water speed in the
water tracking mode. The default setting is two meters, and it is
suitable for most conditions. Change the setting when water
tracking speed display becomes unstable (due to air bubbles,
etc.), or to measure water tracking speed at a given depth.

Basic Operating Procedure

Turning on the system

1. Turn on the transceiver unit.

2. Turn on the display unit.

3. Adjust brilliance of display.

The display unit conducts a check of the system, displaying the
results about 40 seconds after turning on the power.

OPERATION

Selecting operating mode

Press the MODE key to select operating mode among water
tracking, ground tracking, or automatic selection. Selected
mode appears at top right corner on the display.

Figure 20 Display unit and transceiver unit

N: Nav

Figure 21 Location of operating mode indication on echo

display

19

 Ground Tracking Mode: Shows absolute ship and tide

movements based on ground. (Bottom echo required.)

 Water Tr acki ng Mode: Shows movements of ship and tide

relative to near-surface water.

 Nav-aided Mode: Shows ship’s movement measured by the

external navigation equipment, and the tide movements
based on the nav speed data.

 Auto Tracking Mode: Uses ground tracking mode when

bottom echo is available. Switches to water tracking mode
(or nav-aided mode) when bottom echo is lost. Bottom echo
is continuously searched for, and if re-acquired the ground
tracking mode is restored.

Setting measuring depths

1. Press the MENU key.

2. Press ◄ /

3. Press

4. Press

5. Repeat steps 1-4 to set other layers.

Note that measuring depth can also be set on the echo display.
See next page for further details.

► to select DEP menu.

/ to select layer.

/ to set depth.

20

Setting tide differential layer

1. On the DEP menu, press / to select REF TIDE
DIFFERENCE.

2. Press

/ to set layer.

Turning off the power

Figure 22 How to set tide differential

Press the power switch on the display unit.

21

Setting Tide Measuring Depths on the Echo Display

Earlier you learned how to set tide measuring depths on the
DEP menu.

Measuring depths can also be set directly on the echo display.

Selecting a la yer, setting depth

1. On the echo display, press / to select layer desired.
Selected layer’s depth indication changes from white to
orange.

2. Press
while setting depth.

3. Press
white.

/ to set depth. “DEPTH SETTI NG” appears

to finish. Depth indications change from orange to

Figure 23 Echo display

22

Setting up the Echo Display

Setting tide speed vector range

1. Press the MENU key.

2. Press ◄ /

3. Press

4. Press

Setting echo depth range

1. Press / to select ECHO DEPT H RANGE.

2. Press

Setting echo inte nsity

► to select the

ECHO menu.

/ to select SPEED

RANGE.

/ to set speed.

(Default setting: 1.0 knot)

Figure 24 ECHO menu

/ to set depth. (Default setting: 100 meters)

1. Press / to select ECHO LEVEL SHIFT.

2. Press

/ to set echo intensity.

Registering settings, closing the menu

Press the MENU key.

23

Setting up the Course Plot Display

The course plot display mainly plots ship’s track. It can be
displayed by pressing the DISP MODE key.

Figure 25 Sample course plot display, TRK menu

Setting the plot ra nge

1. Press the MENU key.

2. Press ◄ /

3. Press

4. Press

► to select the TRK menu.

/ to select PLOT RANGE.

/ to set plot range.

Setting plot orientation

1. Press / to PLOT MODE.

2. Press

/ to select HU (Head-up) or NU (North-up).

Setting tide vector plotting interval

1. Press ◄ / ► to select the

MARK menu.

24

2. Press
TIDE HISTORY.

3. Press
interval.

/ to select

/ to set plotting

Figure 26 MARK menu

Marks

The CI-80 has two types of marks which can be inscribed on
the display: event mark and target point mark.

Event mark

Target point mark

Figure 27 Appearance of event mark and target point mark

The EVENT key inscribes present position on the display. It is
useful for marking important locations, etc. 25 event marks may
be entered. When the event mark memory is full the oldest
event mark is erased to make room for the latest.

The TARGET POINT key inscribes a target point mark on the
display. The target point mark is useful for estimating 3-D
deformation of fishing tackle (net, etc.) by the effect of tides at
different depths. 25 target point marks can be entered. When
the target point mark memory is full the oldest target point mark
is erased to make room for the latest.

Tide effect can be set on the MARK menu.

25

Erasing marks

1. Press the CURSOR
ON/OFF key.

2. Operate the four arrow keys
to place cursor on mark to
erase.

3. Press the EVENT key (or

TARGET POINT key).

Calculating Trip Distance

Press the TRIP k ey to start calculation of trip distance from
present position. The trip distance indication is automatically
reset to zero.

Figure 28 How to erase

marks

Figure 29 Course plot display, showing location of trip distance

Calibrations (offsets)

Offsets can be applied to measured values to further refine
accuracy. This can be done on the CALB menu.

Opening the system menu

1. Press the DISP MODE key to display the echo display.

2. While pressing and holding down the TRIP key, press the

indication

MENU key.

26

Displaying the CALB menu

MODE

1. Press ◄ / ► to select the CALB menu.

CALB

GT SPD CALIB

0.0 % [-12.8~12.7]

WT SPD CALIB

0.0 % [-12.8~12.7]

DRAFT LEVEL

0.0 m [0.0~50.0]

BEARING CALIB

0.0 ° [-12.8~12.7]

COURSE CALIB

0.0 ° [-12.8~12.7]

*1

*1: Shown when current

(tide) processor is
active.

Figure 30 CALB menu

2. Press

3. Press

/ to select menu item.

/ to set offset.

Menu items

GT SPD CALIB: Raise sett ing when ground tracking

speed is slower than ship’s speed.

WT SPD CALIB: Raise setting when water tracking

speed is slower than ship’s speed.

DRAFT LEVEL: Enter depth of transducer from sea

surface.

BEARING CALIB: Compensate for bearing error in

relation to ship’s bow.

COURSE CALIB: Compensate for course error.
NOTE: If course indication by ground tracking mode differs

from that of navigator (GPS) even with a correct
bearing calibration, enter the course calibration
angle.

4. Press the MENU key to register settings and close the
menu.

Water Speed Display Setting

1. Press the DISP MODE key to display the echo display.

2. While pressing and holding down the TRIP key press the
MENU key.

3. Press ◄ /

4. Press

5. Press
T/D: Ship’s speed, tide and tide differential are calculated

from doppler shift frequency . Press the MODE key to select
measuring mode, in the sequence of G(Ground), W(Water),
A(Auto).

NAV: Ship’s speed and position data are fed from the GPS
navigator. Tide and tide differential are calculated using
GPS data when the ground echo cannot be detected.
Press the MODE key to select measuring mode, in the
sequence of G(Ground), N(Nav), A(Auto).

► to select MODE.

or to select WATER SPEED.

or to select T/D or NAV.

27

MODE

CALB

SELF TEST

OFF SYS

DEMONSTRATION

OFF ON

WATER SPEED

T/D NAV

NAV DATA

SPD L/L

ECHO PNL

*1

*1

*1: Shown when tide

processor is active.

Figure 31 MODE menu

Nav Data Setting

1. Press the DISP MODE key to display the echo display.

2. While pressing and holding down the TRIP key press the
MENU key.

3. Press ◄ /

4. Press

5. Press

► to select MODE.

or to select NAV DATA.

or to select L/L or SPD.

“L/L”: Calculates speed internally from position data
change.

“SPD”: Takes speed data from external navigator as they
are. (Select “SPD” if connected with GPS.)

28

MAINTENANCE & TROUBLESHOOTING

Preventive Maintenance

Regular checks

• Regular maint enance is important for continued

performance. Check the following on a monthly basis.

• Check that all connectors and cables are securely

tightened.

• Check grounding systems of units for corrosion.

• Also regularly measure voltage to confirm that it is within

prescribed rating.

Cleaning of units

Display unit/ transceiver unit

Accumulated dirt can be wiped off with a soft cloth. If necessa ry,
a mild detergent diluted in water may be used. Chemical
cleaners should not be used to clean any unit; they can remove
paint and markings.

Transducer unit

Barnacles and other marine life adhering to the transducer face
can cause a considerable drop in performance. Check the
transducer face regularly for marine life and clean if necessary.
The transducer should never be painted.

29

Troubleshooting

If… Then…

The troubleshooting table which follows provides simple
troubleshooting procedures which the user may use to restore
normal operation. If normal operation cannot be restored, do
not attempt to check inside any unit. Any repair is best left to a
qualified technician.

Table 2 Troubleshooting table

power is on but nothing
appears on the display

nothing appears on the
echo display

echo display is normal
but echo or tide is not
displayed

color is distorted or
display is too bright/
dark

certain colors are
abnormal or picture
jumps

tide vector is not
displayed

• adjust BRILL control.

• check power cable.

• check for loosened power connector.

• check for blown fuse.

• check that transceiver unit is turned on.

• check power cable and connector on transceiver unit for tight connection.

• check fuse on transceiver unit.

• check interconnection cable between transceiver unit and display unit.

• adjust BRILL control.

• check for magnets near display unit.

• try turning off and on the power to restore normal picture.

• “TIDE HISTORY” on the MARK menu may be set to “0”.

no echoes are
displayed

If ship’s track is not
displayed

seabed does not
appear on the echo
display

echo display is
interrupted

tide data is unstable
interference is present

on the display

30

• “ECHO LEVEL SHIFT” on the ECHO menu may be set too narrow.

• “TRACK DISPLAY” on the TRK menu may be turned off.

• “ECHO DEPTH RANGE” on the ECHO menu is set too shallow. Set to

suitable depth, or select AUTO.

• depth is beyond measurable depth (300 meters).

• vessel is in heavy seas or passing over wake of another vessel.

• marine life may be adhering to the transducer.

• “TIDE AVERAGE” on the AVR menu may be set to “0”.

• check ground for corrosion.

• cables of other equipment may be too near transducer cable.

Self Tests, Demonstration Display

The CI-80 has four self tests and a demonstration display
which check the system for proper operation.

Display the system menu

1. Press the DISP MODE key to select the echo display.

2. While pressing and holding down the TRIP key , p re s s the

MENU key.

Conducting sel f tests

MODE

CALB

SELF TEST

OFF SYS

DEMONSTRATION

OFF ON

WATER SPEED
T/D NAV

NAV DATA

SPD L/L

ECHO PNL

*1

*1

*1: Shown when tide

processor is active.

Figure 32 MODE menu

1. Press ◄ / ► to select the MODE menu.

2. Press

3. Press

/ to select SELF TEST

/ to select test.

Self test menu description

SYS: Conducts general check of all circuit boards.
ECHO: Checks receiver and transmitter.
PNL: Checks key and switches of display unit.

4. Press the EVENT key to start test.

5. Press the MENU key when test is completed.

To qui t t he self test, Select “SELF TEST-OFF” on the MODE
menu and press the EVENT key.

31

MODE

CALB

SELF TEST

OFF SYS

ECHO PNL

Starting the demonstration display

The demonstration display checks the controls on the display unit
and conducts a loopback test between the display unit and the
transceiver unit.

DEMONSTRATION

OFF ON

WATER SPEED

T/D NAV

NAV DATA

SPD L/L

*1

*1

*1: Shown when tide

processor is active.

Figure 33 MODE menu

1.

Press / to select DEMONSTRATION.
Press to select ON.

2.

Press the EVENT key.

3.
The echo display appears and the demonstration begins. "DEMO

DA TA OUTPUTTING” appears while the demonstration display is on.
All data shown is for purpose of demonstration; it is not actual data.

To quit the demonstration display, select “DEMONSTRATION­OFF” on the MODE menu and press the EVENT key.

32

Self Test Results

System test

The system test check results appear at each power on or
whenever the system check is conducted though the self test.

SYSTEM CHECK

---------CI-800---------

IP VOL 66503001** ICP Board ROM prog. no.
IP DSW “00 00” IPU Board’s DIP switch setting

in hexadecimal notation
IP MEM 1 2 3 4 5 6 OK ICP Board memory test
IP MEM 7 8 9

---------CI-810--------­CP VOL 66503101** JCPA Board ROM prog no.

CP VOL 66503110**
CP MEM 1 2 3 4 5 6 7 8 OK JCPA Boar d mem ory test
CP DSW “00 00 00 00” JCPA Board’s DIP switch

setting in hexadecimal notation
FT VOL 66503201** JFTA Board ROM prog. no.
FT NEM 1 2 3 4 5 6 7 OK JFTA Board memory test.
TX DEV 1 OK TX device test.
IF VOL 66500401** JIFA Board ROM prog no.
IF MEM 1 2 3 JIFA Board memory test
IF DSW “00 00 00” JIFA Board’s DIP switch setting

in hexadecimal notation
IF DEV 1 JIFA Board device test
IF AN1 RU3 00V RL2.00V OK

AD Converter reference voltage

test
IF AN2 MLD 2.50V Temperature sensor signal test
IF AN3 PWR 1.01V Power check
IF AN4 PTH…RLL…V Inclinometer signal test
IF AN5 IS1 1.01V IS2 1.01V
ERR No. Error Number NOTE: **indicates version no.

Test ICP JCPA JFTA JIFA

Prog. ROM test 5 6 1 1
Data ROM test 6
Memory test 1-4, 7-9 1-5, 7-8 2-7 2-3

33

Error display

“OK” appears for normal memory IC test. For fault NG (No
Good) and asterisk (*) appear next to ROM/RAM number.

Table 3 Error number display and meaning

Error
number

000 Input voltage JCPA, JIFA
001 Overheated transducer element JLGA, JCPA, JIFA*
002 Abnormal Tx B voltage STXA, UPW, JCPA
003 Tx voltage of beam 1 JCPA, STXA
004 Tx voltage of beam 2 JCPA, STXA
005 Tx voltage of beam 3 JCPA, STXA
006 Tx current of beam 1 JCP A, STXA
007 Tx current of beam 2 JCP A, STXA
008 Tx current of beam 3 JCP A, STXA
100 External position data JCP A, JIFA
101 External speed data JCPA, JIFA
102 External time data JCP A, JIFA
103 External depth data JCP A, JIFA
104 Heading data JCP A, JIFA

Reason Circuit board

to check

105 Heading error angle JCPA, JIFA
106 Water temperature data JCPA, JIFA
200 External KP input interval JCPA, JIFA, abnormal external KP

interval

201 Depth sensor input JLGA, JCPA, JIFA,

faulty temperature sensor
202 Inclinometer roll signal JCPA, JIFA, no inclinometer data
203 Inclinometer pitch signal JCP A, JIFA, no inclinometer data

* Abnormally high Tx voltage, abnormally low transducer
impedance, too high Tx duty, faulty temperature sensor (faulty
element), high water temperature, and other factors may also
cause this error display.

34

Echo test

Checking echo display intensity

Press the right and left arrow keys. The SHIFT indication
should change with key operation, between 0 and 100.

Checking echo display range

Press the up and down arrow keys. The echo display range
should in steps of 50 between 0 and 300.

Panel test

Figure 34 Sample echo test display

Press each key on the control panel one by one. The pressed
key’s corresponding “0” on the display should change to “1”.

Figure 35 Panel test display

35

MAIN MENU DEP LAYER1

LAYER2
LAYER3
REF TIDE DIFFERENCE

ECHO SPEED RANGE

ECHO DEPTH RANGE
ECHO LEVEL SHIFT

TRK PLOT RANGE

PLOT MODE
TRACK DISPLAY

MARK PRESET REFERENCE VALUE

TIDE HISTORY

AVR SHIP SPD AVR

TIDE AVERAGE
WT SPD DEPTH

MENU TREE

SYSTEM MENU MODE SELF TEST OFF

SYS
ECHO
PANEL

DEMONSTRATION OFF

ON

WATER SPEED T/D

NAV

NAV DATA SPD

L/L

CALIB GT SPD CALIB

WT SPD CALIB
DRAFT LEVEL
BEARING CALIB
COURSE CALIB

36

SPECIFICATIONS OF CI-80 DOPPLER SONAR CURRENT INDICATOR

1. General

(1) Ground tracking acquirable 3m-200m (measure able range 300m)

depth
(2) Measurable tide range 2m-100m, or 75% of depth, whichever is shallower
(3) Measurable tide depth 10m (measurable from 7m)

(4) Measurable ship's speed Fore/aft: +30kts to –10kts, Port/starboard: +9.9kts to –9.9kts
(5) Measurable tide speed 0kts to 9.9kts
(6) Tide differential range –9.9kts to +9.9kts
(7) Measuring accuracy Ship’s speed: ±1 (1% +0.1kt), Tide speed: (±2% +0.1kt)
(8) Number of bea ms Three (tilt angle 60° each beam)
(9) Transmitting frequency 288kHz
(10) Display type 10-inch color CRT

2. Display

(1) Common displays Speed, heading: 360 degree or 32 compass points

Tide speed, direction: Three layers
(2) Course plot display Track display: DR, max. 1000 pts.
Tide vector: Three layers, max. 1000 pts.
Target point mark: 25 pts.
Event mark: 25 pts.
Ship’s position: Latitude, longitude
Orientation: Head-up (true motion), North-up

Trip distance indication: Provided
(3) Echo display Tide vector: Three layers, circular graph

Tide differential: Three layers, measurement between two

layers

Video sounder: Three directions
(4) Other Self test: All circuit boards, controls

demonstration: With internal data
Calibration facilities

Range selection
Object flow prediction

3. Input/Output Signal

(1) Input signal Compass signal (heading): AD-100 format

KP (2 circuits): Photo isolation (current loop)

CIF/NMEA 0183: Position data
(2) Output signal Log signal: 200/400 pulses, contact signal

KP signal: TTL

CIF/NMEA 0183: Speed, tide

CI-7000 format signal

4. Environmental Conditions

(1) Useable temperature 0°C to 45°C
(2) Relative humidity 85%

5. Power Supply & Power Consumption

Main’s input 11-40VDC, less than 120W avg., or 100/110/115/220/230VAC,

1φ, 50/60Hz (rectifier required)

SP-1