Koden CVS-118Mk II User manual

Table of contents
Important Notice ................................i
Echo sounder-How it works- ............1
Name...................................................2
Getting started ...................................3
Displaying the normal image.....................3
Shifting the depth range.............................5
Shifting the depth range............................5
Selecting the Auto Shift.............................5
Selecting multiple image............................6
Displaying the zoom image........................7
Switching the zoom range.........................7
Switching the zoom position......................8
Relationship between Zoom Range/Zoom
Position and Depth Range/Shift................8
Turning on or off displaying of the A-scope ....9
Measuring depth by VRM (green)..............9
Storing event data.......................................10
Menus .................................................11
Type of menus.............................................11
Calling the menu.........................................11
Menu and key function...............................11
Returning to display mode.........................11
Opening INITIAL MENU 1/2........................11
Selecting unit of measure..........................11
Selecting the bottom zoom........................11
Matching to the boat draft..........................11
Switching the split screen layout between
horizontal and vertical display...................12
Switching the peak hold ............................12
Simulated picture.......................................12
Selecting a display language.....................12
Opening INITIAL MENU 2/2........................12
Correcting the sonic velocity .....................12
Selecting a boat speed data source..........12
Correcting a displayed boat speed............13
Selecting a water temperature data source .....13
Correcting a displayed water temperature....... 13
Selecting an input data format...................13
Selecting gain type....................................13
OPERATION MENU 1/3...............................14
1.
Adjusting the operation panel illumination ....14
2. Turning On or Off the enlarged Character Display. 14
3.Deleting interferences from other boats.14
4.
Displaying the white line on the bottom surface ....14
5.Eliminating undesired colors ..................15
6.Specifying a depth for the bottom detection ..15
7.Changing the output pulse width............15
OPERATION MENU 2/3.................................16
1.
Selecting a color tone for the image display ...16
2.Changing the background color ...............16
3.Turning on or off the alarm, and selecting
the bottom or fish alarm...........................16
4.
Selecting an upper depth limit for the alarm ....16
5. Selecting a lower depth limit for the alarm ......16
6.Setting the magnitude (Color) of fish image
signal for activating the fish alarm ...........17
7.Setting a size (Length) of schools of fish
for activating the fish alarm......................17
Setting the bottom alarm.............................17
Setting the fish alarm...................................17
OPERATION MENU 3/3.................................18
1.Adjusting the effect of auto gain...............18
2.Displaying boat position when a navigator
is interfaced..............................................18
3.Selecting unit of boat speed.....................18
4.Selecting unit of water temperature .........18
5.Turning on or off display of the water
temperature graph...................................18
6.Resetting the Trip Mileage .......................18
7.Clearing event data..................................18
Troubleshooting.................................. 19
Specifications...................................... 19
Major specifications .....................................19
Standard equipment .....................................20
Options...........................................................20
Outline and dimensions...............................20
Installation........................................... 21
Mounting display unit...................................21
Connector plug pin assignment..................21
Technical References ......................... 22
Serial input data............................................22
Details of input sentences...........................22
Serial output data..........................................23
Output data configuration...............................23
Output data specifications.............................23
0093132312

Echo sounder - How it works-
The echo sounder consists of a display unit and a transducer with specified frequencies (or a
transducer with speed/temperature sensor.)
An electronic pulse signal is generated in the transmitter section of the display unit. When
coupled to the transducer, this signal is converted into an ultrasonic signal and is transmitted
toward the bottom. The signal travels through the water until it strikes an object or the bottom.
It is reflected back, hits the transducer surface, and is reconverted into an electronic signal by the
transducer. Then it is amplified in the receiver section, processed in the main logic section, and
displayed, as an image on a LCD screen. (Figure 3)
When your boat travels from point A to point B as shown in Figure 1, the beam of the
transducer installed on your boat shows a cross-sectional view in the water.
Figure 2 indicates a cutaway view under the water when your boat moves from point A to point B.
The screen shows the latest scan data at its right position.
After the next scan, the previous data is moved to the left
and the latest scan data is shown at the right position.
When your boat moves from point A to point B, the screen
shows the scan data as shown in Figure 3.
School of fish
Surface
Bottom
Figure 3
Image
This example shows all data sets that may be shown on the screen. The actual screen,
however, shows part of them according to your operation setup.
Time marker
Frequency
AUTO GAIN display
Color bar scale
Event data stored
Present position
Course
Boat speed
Trip mileage
Water temperature
Bottom depth
Scale
School of fish
A-Scope
Bottom
0093132312/0093132314 1

Name
5.6 inch LCD
Front
Control panel
Knob
Mounting bracke
t
Rear
TRI
Triducer with TEMP/SPEED sensor
(8 pin)
Ground
Plate (serial no.)
10.8 to 31.2
V
DC
Powe
r
connecto
r
(2 pin)
SE
R
DAT
A
GPS/Loran C navigato
r
(6 pin)
BUZZE
R
STD
Standard transduce
r
connecto
r
(3 pin)
Do not connect the transducer
cable to both the STD and TRI
connectors, otherwise
malfunction may occur.
Fuse(3A)
Note:
R
e
f
er to
C
onnector p
l
ug p
i
n ass
i
gnment, page
21
.
2 0093132312/0093132314

Getting started
Displaying the normal image
The normal image consists of two types, the fixed range and auto range. If you select the fixed range, the image is
displayed on the screen within the extent between water surface and the predetermined range (depth). In the
auto range, on the other hand, sea bottom is constantly kept on the screen and if water depth changes, the range
is automatically switched accordingly.
AUTO(auto range)
This image is constantly displayed between water surface up to the bottom on the screen.
ft : AUTO 10 20 40 80 160 320 480 640 960 1280 AUTO
m/hiro/fm/I.fm: AUTO 5 10 20 40 80 120 160 240 320 AUTO
Every press changes the range to next level. However, the change from AUTO RANGE selects
the number which is close to the depth at the time of switching on.
MANUAL RANGE selection
1
2
3
Turning Power on
Press ON to turn the power on. 200kHz
50kHz

DepthUnitm
ROMNo.KM-E23*
SELF CHECK COMPLETED
After 15 seconds,
image comes out
from the right end
of the screen.
POWER OFF:
Hold down the OFF side
the key unit display on
the screen disappears.
Adjusting screen
brightness LCD BRIGHTNESS
LCD
While the word is indicated, press
repeatedly to a desired screen brightness.
LCD
Every press changes the 6 brightness levels in the following rotation.
Brightest Darker Darkest
Selecting the range
(depth range) RANGE
Select the AUTO when
tuning on the auto range.
Selected range
Depth changes automatically
to show the bottom.
ARROW
: Decreases the range scale
: Increases the range scale
Press either or arrow to display the word
A
UTO
RANGE or RANGE and its setting level on the screen. While the word is indicated, press
either or arrow repeatedly to
select best suited ran
g
e.
Press to display the word
LCD BRIGHTNESS.
0093132312/0093132314 3

Feed count/transmission count is the relationship existing between them. For example, 2/1 indicates that
images are fed 2 times into left per transmission and 1/4 means that images are fed 1 time into left per 4
transmissions.
Relationship Between Feed Rate and Transmission Count
2/1 1/1 1/2 1/4 1/8 STOP
Fastest Slowest
IMAGE SPEED rotation
While the word is indicated, press for a proper
speed for your particular application.
Press to display the word IMAGE SPEED.
Every press changes speed
in the following rotation
Select word STOP when
stopping an image feed.
IMAGE SPEED
Speed selected
4
5 Selecting image speed
When high frequency images alone are on the screen, you can adjust high frequency gain. Likewise,
when low frequency images alone are displayed, adjustment of low frequency gain is available. When
both high and low frequency images are displayed in parallel, pressing both sides of the key
allows you to select the frequency you want to adjust. If you set any of high and low frequency to the auto
gain, the other is also set to the auto. And, if the auto gain of one of the two frequencies is reset, the auto
gain being set on the other is also reset.
GAIN Control by Frequency Level
GAIN level
Pressing the key increases the gain in 20 steps from the lowest to the highest level. If you
keep on pressing the key after the highest level is reached, the gain returns to the lowest automatic gain
level as shown below. AUTOGAIN Minimum(1)  Maximum(20) AUTOGAIN
AUTOGAIN: Constantly provides an optimum echo color display.
While the word is indicated, press either or arrow until
the bottom surface is displayed in the strongest echo color
Press either or arrow to display
the word GAIN and its gain level.
AUTO GAIN
GAIN
Gain level selected
Bottom surface
H FREQ GAIN
H FREQ GAIN
Select the AUTO when
turning on the gain.
1. Adjust the gain so that the bottom surface is displayed in the strongest echo color and the
color becomes weaker the higher it goes on the screen. Use care so that the strongest echo
color may not cover an excessively wide area.
2. The display color can be affected by magnitude of signals reflected by schools of fish and
others. The bottom surface may not be displayed with the strongest echo color when the
bottom is very deep or made of soft soil.
3. Make sure to adjust the gain so that schools of fish alone may be clearly displayed without
allowing noises to appear on the screen.
Adjusting gain
4 0093132312/0093132314

Shifting the depth range
The normal image consists of two types, the fixed shift and auto shift. If you select the fixed shift, the
image is displayed on the screen within the extent between the predetermined depth (Shift position)
and the also predetermined range. In the auto shift, on the other hand, sea bottom is constantly on the
lower part of the screen and if water depth changes, the image is automatically shifted to the direction
of depth change.
SHIFT
Selected shift position
ARROW : Shallower
: Deeper
Press either or arrow to display the word
SHIFT and its setting level on the screen. While the word is indicated, press either
saor arrow repeatedly to select best
suited shift position.
Shifting the depth range
Pressing the SHIFT key sequentially switches the shift value by one unit (when the metric unit is
employed, pressing the key once increases or decreases the value by 1 meter). When you move into
the fixed shift from the auto shift, however, shifting starts from the value being set in the auto shift
mode.
AUTOSHIFT 0  Maximum depth range
Selecting the Auto Shift
The auto shift mode constantly displays the sea bottom at the bottom of the screen.
SHIFT
AUTO
Press either or arrow to display the word
SHIFT and its setting level on the screen. While the word is indicated, press
arrow repeatedly to select auto shift.
Note You cannot select the auto shift as long as the auto range is tuned on.
0093132312/0093132314 5

Selecting multiple image
Pressing the key changes the screen in the following sequence.
kHz: Transmission frequency
Normal(low)/ (hight)Normal/ zoom Bottom zoom
Normal/Bottom
lock or bottom
discrimination
Normal
Pressing both sides of the key alternately selects the high and low frequency for the
display.
Switching between the bottom
lock and bottom discrimination This switching is available from the INITIAL MENU 1/2
"BTM/B.D. SELECTION".
Switching Between the Vertical
and Horizontal Screen Split This switching is available from the INITIAL MENU 1/2
"DISP. LAYOUT".
6 0093132312/0093132314

Displaying the zoom image
The zoom function allows you to view a desired image in an enlarged size. Two types of zoom images
are available. One is the partial zoom which provides an enlarged image of the pre-specified range
and the others the bottom zoom in which the bottom is constantly displayed on screen. The bottom
zoom comes in three styles, namely the fixed bottom zoom, bottom quality zoom and partial bottom
zoom.
Switching the zoom range
Using the key allows you to zoom up any of the following zoom images.
Normal/Bottom lock or
bottom discrimination
Bottom zoom Normal/zoom
Switching between the bottom lock
and bottom discrimination image This switching is available from the INITIAL MENU 1/2
"BTM/B.D. SELECTION".
ZOOM RANGE mark
The zoom range is indicated
by an orange bar.
Presented zoom range
ZOOM RANGE
Selected zoom range
Bottom lock image
Bottom discrimination image
Zoom image.
Press to display the word
ZOOM RANGE and its setting. While the word is indicated, press repeatedly
to select zoom range.
Pressing the
key sequentially changes the zoom range as shown below.
A
1/2 space of a depth
range in the normal image
is enlarged into full size o
f
the zoom image screen.
A
1/4 space of a depth
range in the normal image
is enlarged into full size o
f
the zoom image screen.
A
1/8 space of a depth
range in the normal image
is enlarged into full size o
f
the zoom image screen.
0093132312/0093132314 7

Switching the zoom position
Pressing the key sequentially changes the zoom image.
Note
This switching is not available when the bottom lock,
bottom discrimination or partial bottom zoom is turned
on because the zoom position is used as reference of the
bottom.
Zoom
Position
It refers to the surface side of the zoom range, namely
the
p
osition from where the zoom starts.
Normal/zoom
ZOOM RANGE
Selected zoom range
Presented zoom range The zoom position comes to
the top of the zoom mark
ZOOM position
Press to display the word
ZOOM POSN and its setting. While the word is indicated, press repeatedly
to select zoom position.
Pressing the
key sequentially changes the zoom position as shown below.
Top of the normal screen Zoom position is moved toward the sea bottom by 1/8 of the depth range
Bottom of the zoom range comes to the bottom of the normal screen
Relationship between Zoom Range/Zoom Position and Depth Range/Shift
Changing the depth range or shift position does not change the zoom range or zoom position being
previously set. If you change the zoom range or zoom position using the Zoom Range key or Zoom
Position key, this change is implemented using the currently selected depth range or shift position as
the reference. If, in this case, the zoom range or zoom position is out of the screen, zooming is
executed using the top of the normal screen as the zoom position.
8 0093132312/0093132314

Turning on or off display of the A-scope
This function is used for displaying the fish image in A-scope so that you may quickly identify
movement of the target fish.
Display in A-scope
Press to display the word
A
-SCOPE
in right side of the screen.
Deleting the A-scope Pressthe keyonce.
Measuring depth by VRM (green)
By moving the VRM (green) up and down to a target, such as a school of fish on the screen, the depth
of the target can be obtained.
VRM
Measured depth
Presented depth
VRM (green)
Press either or arrow to
display the word VRM and its
depth setting on the screen.
While the word is indicated again,
press either saor arrow repeatedly
to measure the target depth.
0093132312/0093132314 9

Storing event data
The following event data is storable by pressing the key.
Boat position............Position data from the connected navigation system is stored.
Bottom depth............Bottom depth is stored.
Water temperature...Water temperature is stored. Before it can be stored, water temperature data
must be entered externally or from the water temperature sensor (option).
The event data stored is also recalled in green numerals and words on the screen by pressing the
EVENT key again.
Storing Recalling
Press to display the words SET EVENT on the screen,
and the event data is stored in the memory. The stored
data is displayed in the lower left corner of the screen.
Press to remove the data from the screen.
For recalling the data, press the key again.
Storing new
event data
You can store only a single set of event data. Before storing a new set of event data, you
must delete the currently stored one using the EVENT DATA CLEAR of the menu (3/3 page).
10 0093132312/0093132314

Menus
Type of menus
The echo sounder has the following menu’s: INITIAL MENU (1/2 and 2/2 pages), MENU (1/3,2/3 and
3/3 pages) consisting of five different screens.
Calling the menu
Initial menu : Pressthe keywhileholdingdownthe key.
Note1: When power is turned on, turn it off once before calling the menu.
2: If you turn power on while depressing the MODE key, the Test menu will appear. This is the
menu for adjustment, so press the MODE key again to exit from this menu.
Press the key.
Pressing this key alternately displays 1/2 and 2/2 page of the Initial Menu.
Menu : Press the key while the fish finding screen is turned on.
Pressing this key sequentially displays 1/3, 2/3 and 3/3 page of the Menu.
Menu and key function
Menu item
UNIT SELECTIO
m fm hr I.fm ft
Selected character (yellow) Press the right or left portion.
Corresponding key
Each item on the screen can be operated
by the right or left portion of each
corresponding key. Selection is shown
by yellow character.
Returning to display mode
Press to return to graphic screen.
Opening INITIAL MENU 1/2
hr
Following operations are available from the Initial Menu 1/2:
1.Selecting unit of measure
2.Selecting the bottom zoom
3.Matching to the boat draft
4.
Switching the split screen layout between horizontal and vertical display
5.Peak hold
6.Simulated picture
7.Selecting a display language
Selecting unit of measure The unit of measure for depth is selectable from:
m(meters)/fm(fathoms)/hr(Japanese hiro) /I.fm(Italian
fathoms)/ft(feet)
UNIT SELECTION
m fm hr I.fm ft
Selecting the bottom zoom
You can select a desired bottom zoom type from
BTM/B.D. SELECTION
BTM B.D.
the following two.
BTM
(Bottom lock image) B.D. (Bottom discrimination)
Matching to the boat draft
DRAFT (0.0~5.0m)
0.0m This function is used for matching the depth of the
emission line to the draft of your boat.
0093132312/0093132314 11

Switching the split screen layout between horizontal and vertical display
You can select the horizontal or vertical layout for
displaying the split screen image.
DISP.LAYOUT
Switching the peak hold
PEAK HOLD
OFF ON Peak Hold:
A video processing method, which compares the echoes
generated from two consecutive transmissions and outputs
the largest echo signal.
Simulated picture
SIMULATOR
ON The simulator allows you to utilize functions of the
devices that are not actually equipped on your boat.
Execute from simulated picture Turn power on again pressing the key.
Selecting a display language
LANGUAGE(言語選択)
ENGLISH
(
英
)
 JAPANESE
(
和
)
This key allows you to select a desired language
between Japanese and English.
Opening INITIAL MENU 2/2
1 2
Following operations are available from the Initial Menu 2/2:
1. Correcting the sonic velocity.
2. Selecting the boat speed data source.
3. Correcting the displayed boat speed.
4. Selecting the water temperature data source.
5. Correcting the displayed water temperature.
6. Selecting the input data format.
7. Selecting the gain type.
Correcting the sonic velocity
A true depth of water can be distorted by water
temperature or salt concentration at the time of
measurement. In such case, you can use this
function to correct the measurement and display the
known depth.
SONIC CORR. (-7~+2%)
0%
Selecting a boat speed data source
SPEED DATA
INTERNAL EXTERNAL
TRI and SER DATA connector are provided on the rear side of the incoming signal indicator unit. Both
connectors accept boat speed data. When collecting the data from SER DATA connector, you need to select
a proper input data format referencing the "Selecting an input data format".
INTERNAL...........This mode is used for collecting boat speed data from the water temperature/speed sensor
ST-80/90/100 connected to TRI connector. If the boat speed data is absent, "0.0" appears
in he data display space.
EXTERNAL..........This mode is used for collecting boat speed data from the speed sensor connected to SER
DATA connector. If the boat speed data is absent, "X.X.X.X" appears in the data display
space.
12 0093132312/0093132314

Correcting a displayed boat speed
SPEED CORR.(-50~+50%)
0%
When the water temperature/speed sensor ST-80/90/100 is connected, you can correct currently displayed
boat speed data
Selecting a water temperature data source
TEMP DATA
INTERNAL EXTERNAL
TRI connector and SER DATA connector are provided on the rear side of the incoming signal indicator unit.
Both of them accept water temperature data. When acquiring the data from SER DATA connector, you must
select a proper input data format referencing the "Selecting an input data format".
INTERNAL...........This mode is used for collecting the water temperature data from the water
temperature/speed sensor ST-80/90/100 connected to TRI connector. If the water
temperature data is absent, "0.0" appears in the data display space.
EXTERNAL..........This mode is used for collecting water temperature data from the water temperature sensor
connected to SER DATA connector. If the water temperature data is absent, "X.X.X.X"
appears in the data display space.
Correcting a displayed water temperature
TEMP CORR. (-9.9~+9.9 C)
0.0C
When the water temperature/speed sensor ST-80/90/100 is connected to TRI connector, you can correct
currently displayed water temperature data.
Selecting an input data format
When acquiring data from the GPS navigation system or electronic compass via the SEA DATA connector,
input data must have one of the following formats.
FORMAT
0182 0183
COMPASS
0182...................Acquires data on the current position (latitude and longitude) in the NMEA0182 format.
0183...................Acquires data on the current position (latitude/longitude or LOP), bearing of your boat (VTG
sentence), external boat speed and external water temperature in the NMEA0183format.
COMPASS...........Acquires data on bearing of your boat (HDM sentence) in the NMEA0183 or DC400 format.
For the data (sentence) entered in the NMEA 0183 format, refer to the "NMEA 0183 output data format Ver.
1.5/2.0".
If the data does not contain a sentence or you cannot receive the data, XXXX will appear in the data display
space.
If the navigation system or electronic compass is not equipped, data won't be displayed even if you may
specify the format.
Selecting gain type
For general applications where bottom depths are continually changing, set the gain type to 2 (default value).
For consistent shallow water use (under 50 feet) select gain type 1.
GAIN TYPE
1 2
1......................Gain changes linearly by the gain number.
2.......................Gain changes logarithmically by the gain level number.
0093132312/0093132314 13

OPERATION MENU 1/3
The following operations are available from 1/3 of the Menu:
1. Adjusting the operation panel illumination
2. Turning On or Off the enlarged Character Display.
3. Deleting interferences from other boats.
4. Displaying the white line on the bottom surface.
5. Eliminating undesired colors.
6. Specifying a depth for the bottom detection.
7. Changing the output pulse width.
1. Adjusting the operation panel illumination
2. Turning On or Off the enlarged Character Display
PANEL ILLUM.
D L
NAV DATA DISP.
OFF ON
This function allows you to adjust illumination of the operation
panel when required.
Turning the enlarged character display provides enlarged
display of your current boat position, bearing of your boat, boat
speed, trip mileage and water temperature.
3. Deleting interferences from other boats
If nearby boats use a fish finder of the same frequency
and emission rate, interfering images may appear on
the screen as shown in the figure below. This function
allows you to delete such images.
If noise is not displayed on the screen,
select OFF to display proper image
INTFRC. REJ.
OFF 1 2
Fish image
Interfering images
4. Displaying the white line on the bottom surface
WHITE LINE
OFF ON
This function shows a specific range from the bottom
surface in white so that you may identify schools of fish
in deep water more easily.
14 0093132312/0093132314

5. Eliminating undesired colors
COLOR REJ.
Noise interference can be displayed on the screen in pale blue, white or pale green. You can
eliminate such noise by sequentially deleting the display colors starting with left side. You can check
changes in the display colors from the rainbow pattern that appears on the left side of the fish finding
screen.
Color bar
6. Specifying a depth for the bottom detection
This function avoids mistaken bottom from schools of fish by
setting the inhibit depth for bottom detection.
BOTTOM START
1m
7. Changing the output pulse width
PULSE WIDTH
S M L
You can specify output pulse width from the Short, Medium and
L
S (Short)....................Selecting the Short increases the fish image resolution, though it reduces the
maximum usable depth for fish finding.
M (Medium)..............Fish image resolution and fish finding depth available from this width are in
between that provided by the Short and Long width.
L (Long).....................This width increases the fish finding depth at the expense of the fish image
resolution.
0093132312/0093132314 15

OPERATION MENU 2/3
The following operations are available from 2/3 of the Menu:
1. Selecting a color tone for the image display.
2. Changing the background color.
3. Turning on or off the alarm, and selecting the bottom or
fish alarm.
4. Selecting an upper depth limit for the alarm.
5. Selecting a lower depth limit for the alarm.
6. Setting the magnitude (Color) of fish image signal for
activating the fish alarm
7. Setting a size (Length) of schools of fish for activating
the fish alarm.
1. Selecting a color tone for the image display
Four sets of color tones are usable on the screen.
16 ...................16-color display with blue background.
8 .....................8-color display with blue background.
3 .....................Day screen color
(16-color display with white background and maximum LCD brightness)
4 ......................Night screen color (8-color display with black background and minimum LCD brightness.)
2. Changing the background color
Use this function, for instance,
when the screen is too bright in
the night time operation.
3. Turning on or off the alarm, and selecting the bottom
or fish alarm
TONE OF COLOR
16 8
BACKGROUND
D L
Displa
y
when selecting
the FISH alarm.
16 8
BACKGROUND
BLACK
BACKGROUND
D L
BACKGROUND
D L
BACKGROUND
D L
BACKGROUND
D L
BACKGROUND
WHITE
ALARM SEL.
OFF BTM FISH
OFF............................The alarm function is not available.
BTM (Bottom)...........The alarm is activated if the bottom moves out of the depth enclosed by the
upper alarm and lower alarm.
FISH...........................The alarm is activated if the fish image with the previously specified color and
length appears within the upper alarm and lower alarm depth.
4. Selecting an upper depth limit for the alarm
It is used for selecting the upper depth limit for activating the
alarm. For the upper depth limit, refer to the section on "Setting
the bottom alarm" or "Setting the fish alarm".
UPPER ALARM
0m
5. Selecting a lower depth limit for the alarm
It is used for selecting the lower depth limit for activating the
alarm. For the lower depth limit, refer to the section on "Setting
the bottom alarm" or "Setting the fish alarm".
LOWER ALARM
320m
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