COLOR SCANNING SONAR MODEL CSH-23/24
Your Local Agent/Dealer 9-52 Ashihara-cho, Nishinomiya, Japan Telephone : 0798-65-2111 Telefax : 0798-65-4200 All rights reserved. Printed in Japan FIRST EDITION : NOV. 1997 E PUB.No. OME-13040 ( DAMI ) CSH-23/24 : APR.
SAFETY INSTRUCTIONS WARNING WARNING Do not open the equipment. Keep heater away from equipment. Hazardous voltage which can cause electrical shock exists inside the equipment. Only qualified personnel should work inside the equipment. A heater can melt the equipment’s power cord, which can cause fire or electrical shock. Immediately turn off the power at the switchboard if water leaks into the equipment or something is dropped in the equipment.
CAUTION Do not exceed 18 knots when operating the equipment and do not exceed 16 knots when lowering or raising the transducer. The transducer may become damaged. The zinc block attached near the transducer must be replaced yearly. The junction between the transducer and main shaft may corrode, which can result in loss of the transducer or water leakage inside the ship. Do not use the equipment for other than its intended purpose.
TABLE OF CONTENTS FOREWORD A Word to CSH-23/24 Owners ............................................................................................... vii Features................................................................................................................................... vii System Configuration ............................................................................................................viii CONTROL DESCRIPTION Control Layout on Display Unit and Remote Control Box .....
FUNCTION KEYS Programming the Function Keys ...........................................................................................6-1 Replaying a Function Key .....................................................................................................6-1 Function Key Fine Tuning .....................................................................................................6-2 Saving Function Key Settings to a Memory Card .................................................................
WARNINGS Overvoltage Warning ...........................................................................................................12-1 Unretracted Transducer Warning .........................................................................................12-1 SELF TESTS Opening the Self Test Menu ................................................................................................13-1 Self Test Description ....................................................................................
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FOREWORD A Word to CSH-23/24 Owners Congratulations on your choice of the FURUNO CSH-23/24 Color Scanning Sonar. We are confident you will see why the FURUNO name has become synonymous with quality and reliability. For over 40 years FURUNO Electric Company has enjoyed an enviable reputation for quality marine electronics equipment. This dedication to excellence is furthered by our extensive global network of agents and dealers.
System Configuration viii
CONTROL DESCRIPTION Control Layout on Display Unit and Remote Control Box POWER OFF TRANSDUCER ON SUB PANEL 1 - F1 F2 F3 NORM E/S HIST - - + RANGE TARGET SLICE VERT SCAN SHOOT R/B + RECALL MEMO + MAIN PANEL GAIN AUTO TILT WIDTH TILT SCAN DEPTH NET COURSE TARGET LOCK EVENT1 EVENT2 ESTIMATE1 ESTIMATE2 FISH OFFCENT DIM CONT BRILL AUDIO PUSH-OPEN SUB PANEL 2 DISP SELECT DATA 1 2 3 c d d EVENT TGT LOCK TX ESTIMATE NET COURSE 1 FISH OFFCENT FUNCTION 1 2 + – 3
Main Panel POWER TRANSDUCER OFF ON F1 F2 F3 NORM E/S HIST - RECALL - + RANGE TARGET SLICE VERT SCAN SHOOT R/B + MEMO + GAIN AUTO TILT WIDTH TILT SCAN DEPTH NET COURSE TARGET LOCK DIM EVENT1 EVENT2 ESTIMATE1 ESTIMATE2 FISH OFFCENT CONT BRILL AUDIO Figure 1-2 Main panel Main panel control description Control 1-2 Function POWER ON, POWER OFF ON: Turns on the system. The lamp above the key lights during Tx and blinks when the TX key in sub panel 1 is turned off.
Control Function NORM, E/S, HIST (Mode keys) Select display mode: NORM, normal sonar picture; E/S, Echo sounder combination; HIST, Historical display. Lamp above a key lights to show current selection. RECALL, MEMO RECALL: Replays saved picture. MEMO: Saves picture to memory card or internal memory. RANGE Selects a picture display range. Range selected appears on the display. GAIN Adjusts receiver sensitivity.
Sub Panel 1 POWER OFF TRANSDUCER ON MENU END HELP CARD REPLAY COLOR NET REPLAY TX F1 F2 F3 F4 F5 NORM E/S HIST RECALL MEMO Figure 1-3 Sub panel 1 Sub panel 1 control description Control Function MENU Opens/closes the menu. END • When the menu is displayed it terminates menu operation and returns control to the sonar picture. • When in a sub menu it returns control to previous sub menu. HELP Provides operating information for current menu. Select items on menus.
Sub Panel 2 (data setting window) This example shows settings of TVG and TX. ITEM (TVG•TX selected) TVG•TX CURRENT SETTINGS for item selected (TVG•TX) SIGNAL ES TVG TX DELETE MK NEAR MEDIUM FAR CYCLE PL OUTPUT SONR•BEAM AUTO ALM•AUDIO OPER P-SET (TOGGLE) 7 8 9 7 8 9 g + + + + + + h – – – – – – Item selection keys Select item. Setting change keys Change control setting. OPER P-SET key Opens/closes data setting window.
Main Item Item Main Sub NL SIGNAL PROCESS SIGNAL ES1 (Net Recorder) ES1 (Net Recorder) 3 AGC 0–10 Automatically reduces receiver gain against strong echoes such as seabed. Adjust so fish echo is displayed near seabed. 0 2AGC* 0–10 Suppresses seabed echoes. If AGC alone cannot suppress seabed echoes, use 2AGC. 0 1–4 Selects echo level versus presentation color curve. The higher the setting, the easier it is to see weak echoes on the screen.
Main Item Item Main SONAR Sub Setting Range 1–2 Choose "1" for single sonar, or "2" for dual sonar. 1 F-SHIFT 1–2 Shifts Tx frequency. Choose "1" for normal use. 1 Selects presentation mode among North-up (Nup), Heading up (Hup), True Motion (TM). Hup 0–10 Sets horizontal beamwidth of Rx beam. The higher the number, the narrower the beam. 0 0–4 Sets vertical beamwidth of transmission beam. "0" is normal setting.
Remote Control Box DISP SELECT 1 3 2 EVENT TGT LOCK Each press displays water temperature or depth at screen center for about five seconds. Turns on transmitter. ➡ ➡ TX ➡ elects which display unit to ontrol in multiple display unit stallation. ises/lowers the transducer. : Raises transducer. : Mid protrusion : Full protrusion DATA ESTIMATE NET COURSE Press to enter mark shown on key or shift screen center. Shifts trackball mark. 1 FISH OFFCENT FUNCTION 1 Selects display range.
OPERATIONAL OVERVIEW Turning the Power On/Off Turning the power on Press the ON switch on the main panel. The lamp above the switch should light. If it doesn’t, press the TX switch on sub panel 1. Turning the power off Retract the transducer with the c switch and then press the OFF switch on the main panel. Note: The transducer is automatically retracted into the tank even if the OFF switch is pressed before retracting the transducer.
Selecting a Display Mode The CSH-23/24 provides three display modes: normal sonar picture, echo sounder (E/S) combination, and history display combination. Those modes may be selected with the NORM, E/S and HIST keys. Table 2-1 Display mode description Mode NORMAL Description The sonar picture appears over the entire screen. This mode is useful for detecting and tracking fish schools. The default display area is 1.3 times the range, but it can be changed to 1.
Selecting a Display Range Operate the RANGE control to select a display range. The selected range appears at the top of the screen. Setting the Tilt Angle The tilt angle shows the direction to which the sound wave is emitted. When the sound wave is emitted horizontally, the tilt angle is said to be zero degrees and when emitted most downward, 60 degrees. To set a tilt angle, operate the TILT lever. Watch the tilt angle indication at the top right corner on the screen.
How to discriminate fish echoes from the seabed The figure below illustrates how two fish schools a and b are displayed on the screen using three different tilt angles. Case 1: Tilt angle 30 to 40 degrees. Fish school is obscured by the seabed. Case 2: Tilt angle 10 to 20 degrees. Fish school is located above the seabed (midwater). Case 3: Tilt angle 0 to 10 degrees. Fish school is located close to the seabed.
Tilt angle for surface fish Sound emitted from the sonar transducer forms a circle-shaped beam with a width of approximately 12 degrees in the vertical direction (vertical beam width). The tilt angle is indicated by the angle between the center line of the beam and the horizontal plane. Then, if the tilt angle is set to 0 degrees, the center line is parallel with the sea surface and one half of the emitted sound goes upward, toward the sea surface.
Suitable tilt angle The figure below illustrates the relationship among tilt angle, depth and detection range. Refer to it to find out the suitable tilt angle for a given depth/detection range.
Adjusting the Gain The GAIN control adjusts receiver sensitivity (gain). Adjust it so fish echoes are clearly displayed with minimal noise on the screen. Too high a setting not only displays excess noise and makes it difficult to discriminate wanted echoes but also causes seabed echoes to be painted in strong colors, resulting in echoes being masked by seabed reflections. Normally, set the control somewhere between positions “3” and “5”.
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FINE TUNING THE PICTURE Eliminating Unwanted Feeble Echoes Echoes from targets such as seabed and fish return to the transducer in order of distance to them, and when we compare their intensities at the transducer face, those from nearer targets are generally stronger when their reflecting properties are nearly equal.
4. When sea surface reflections or plankton layers disturb the picture, decrease appropriate TVG option by one or two steps by pressing – (minus) key. 5. When fish school is located on a long range setting (about 800 meters) which is approaching own ship. Adjust the tilt to keep the fish school in the center of the sonar beam, namely, fish school is displayed in strongest colors possible. Confirm that the fish echo is displayed in the same color as it approaches.
Suppressing Seabed Tail AGC (data setting window: SIGNAL, SIGNAL PROCESS) The AGC functions to automatically reduce the receiver gain only against strong echoes such as the seabed or a large fish school. Since weak echoes remain unaffected, a small fish school becomes easier to detect. Adjust it so that the AGC works only on seabed reflections. Do not set it too high; weak echoes may be missed.
Suppressing Seabed and Sea Surface Reflections in Shallow Waters Data setting window: TVG•TX, OUTPUT In shallow fishing grounds with hard or rocky bottom, seabed reflections often interfere with wanted fish echoes and they can not be eliminated sufficiently with the aforementioned TVG and AGC controls, especially when the TILT is set to a larger angle in order to track fish schools approaching within 400 m.
1. Turn off the TX switch and operate all on-board equipment one by one while observing the picture. 2. Run the boat at various speeds to check if the noise is speed dependent. If neither of the above two steps has effect on the picture, adjust one of the following: Interference rejector (data setting window: SIGNAL, SIGNAL PROCESS) This control is similar to the interference rejector on echo sounders and radars. It is effective for rejecting random noise and sea surface reflections in rough sea conditions.
Setting F-shift (data setting window: SONR•BEAM, SONAR) If interference cannot be suppressed by the interference rejector (IR) or Tx cycle, change the setting of F-SHFT from 1 to 2. Noise limiter (data setting window: SIGNAL, SIGNAL PROCESS) Weak, unwanted reflections, colored light-blue or green, appear when the water is dirty, plankton layers exists, or due to ship’s noise.
MARKS AND DATA Marks, Data and Display Mode Normal display mode Figure 4-1 Marks and data appearing in the normal display mode 4-1
Normal display mode w/text Figure 4-2 Marks and data appearing in the normal display mode w/text Echo sounder combination display Figure 4-3 Marks and data appearing in the echo sounder display mode 4-2
History display Figure 4-4 Marks and data appearing in the history display mode Permanently Displayed Marks and Data *Requires external sensor. Mark/Data Trackball Mark Data Description → → Trackball mark data: : Slant range → : Horizontal range ↓ : Depth B : Bearing → ↓ B ° Bearing is shown in 360° or ±180° indication system, relative to ship’s heading. In the latter case, "B" is indicated as follows: B P.... on the port side B S....
Mark/Data Description Own Ship’s Mark Shows own ship’s present position. The direction of the arrow shows ship’s heading. This mark moves with ship’s movement in the * true motion mode. On all other modes it is fixed at the screen center. * North Mark (or Heading Mark) When the CSH-23/24 is connected to a gyrocompass the mark is called the north mark and points North. If there is no gyrocompass input it is the heading mark and points in the direction of own ship’s heading.
Mark/Data Latest Fish Mark Description These marks are inscribed on the screen by pressing the FISH key. Ten fish marks can be entered.
Mark Description *Ship’s Track Mark With gyrocompass or speed log connection, own ship’s track is plotted by a solid line. When the length of the line exceeds five times the range the oldest part of the track is erased. *Tidal Current Mark This mark can be displayed with current indicator input. The tidal current marks are displayed on the net shooting mark ( ) and net sonde marks ( ). The tidal current markers shows tidal current speed in three layers (1—3) selected on the tidal current indicator.
Mark Target Lock Mark Description The target lock mark automatically tracks the fish school selected by the operator. This function requires speed and gyrocompass inputs. or Net Shooting Mark Net Shooting Data : Net Sonde Mark (10 pts. max) Press the SHOOT key at the instant you shoot the net to display the net shooting mark on the display. The net shooting mark is drawn at own ship’s position the moment the key is pressed and moves on the own ship’s track mark with ship’s movement.
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MENU OVERVIEW Many functions are carried out through the menu system, which consists of the USER, SYSTEM, DATA SET and INITIAL SET/ DATA menus. The menu you will use most often is the USER menu. How to open Menu USER Press MENU. SYSTEM Press and MENU together. DATA SET Press and MENU together. INIT SET/TEST Press MENU and ON together. (Press and hold down until the buzzer sounds. All LEDs light while keys are held down.
2. Operate the arrow keys in sub panel 1 to select a menu. As you move through the menu, each item, initially shown as blue on gray, reverses to gray on blue to show selection. For example, select the HIST DSP/GRPH menu. 3. Press the MENU key to display menu selected. USER MENU HIST DSP/GRPH Select item with dc[ \ keys and press MENU key. Press END key to close menu. HIST Window DSP Fish Histogram AUDIO PRT/STBD ON OFF H-Slice Figure 5-2 HIST DSP/GRPH menu 4.
USER Menu Description Table 5-1 User menu description Menu Menu Item Description List Lists contents of memory card. Save Saves control and menu settings to memory card. Delete Deletes data from memory card. Initialize Formats memory card. CARD ECHO DAT Save Saves echo inside estimate mark (stored in internal memory by MEMO key) to memory card. CARD NET DATA Save Saves net shooting data (stored in internal memory) to memory card.
Menu Menu Item Description Own Ship Mark Turns those marks on/off. Current Flow Direction w/Current Vec displays tidal current direction as "To" or "From". CURRENT VEC Own Position Mark w/Current Vec Net Shoot Mark w/Current Vec Current Flow Dir Save Method SAVE PICTURE 5-4 Selects how to save echoes. Whole: Saves echoes and data on whole screen to memory card. Est MK: Saves echoes inside estimate mark to internal memory. QK Save: Saves echoes and data on whole screen to internal memory.
SYSTEM Menu Description The SYSTEM menu can be displayed by pressing MENU and c together. For help, press the HELP key. Menu SIGNAL PROCESS Item Description Smooth Echo Rng Selects echo smoothing level in range direction. The higher the number, the higher the smoothing effect. The setting range is from 0 to 3. Smooth Echo Cir Selects echo smoothing level in circular direction. The higher the number, the higher the smoothing effect. The setting range is 0 to 3.
Menu TARGET LOCK BRG READOUT DATA DISPLAY MARK SIZE 1 MARK SIZE 2 Item Fish Spd Update Selects update interval of fish speed readout. You can select from 15 seconds, 30 seconds, 45 seconds, or 60 seconds. 60 is the normal setting. Target LK Window Selects size of target lock window (in pixels); 64 x 64 (normal), 96 x 96 (large), or 128 x 128 (largest). Course Selects unit of readout for course and bearing between fish marks; 32 compass bearing or 360° true bearing.
Menu ES/NET REC Item Description ES 1 Color Curve Selects echo level versus presentation color curve for echo sounder 1. Linear: Weak echoes are not as conspicuous as in log setting. Useful for eliminating weak echoes. Log: Weak echoes are painted in "stronger" colors. The higher the setting the easier are weaker echoes to see on the display. ES 2 Color Curve Same as above except for echo sounder 2. Picture Advance Sets picture advance speed for the echo sounder display.
DATA SET Menu Description The DATA SET menu can be displayed by pressing MENU + d . For help, press the HELP key. Menu COLOR CURVE Item Sonar 1 Sonar 2 Echo Sounder 1 Echo Sounder 2 Description For each of these devices you may change settings of echo level versus presentation color curve, which you selected at either "CURVE" at SIGNAL PROCESS on data setting window or system menu. Note that Sonar 2 is not used. l. First select item to change on COLOR CURVE sub menu, and then press the MENU key.
Menu CHANGE COLOR Item Sonar 1 Sonar 2 Echo Sounder Marks Menu Description You can customize the color of these items according to user request, etc. Note that Sonar 2 is not used. For display color change on Sonar 1 you can change color according to selection by COLOR key. 1. First select item to change on CHANGE COLOR sub menu, and then press the MENU key. Before (R) (G) (B) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Display Color ,,,, ,,,, ,,,, ,,,, ,,,, Before (R) (G) (G) ,,,, ,,,, ,,,, ,,,, ,,,, 2.
Menu Item NET SHOOT PLAN Net Diameter Sets estimated ship's turn diameter necessary for shooting net, to get accurate depiction of net location mark, which you can display by pressing the NET COURSE key. The setting range is 200 to 1000 meters in 10 meter steps. Tilt Interlock Choose ON to interlock diameter of net location mark with tilt angle. When you lower the tilt angle the on-screen net location mark enlarges. (For example, the net diameter is set for R meters.
INIT SET/TEST Menu Description The INIT SET/TEST menu can be display by pressing MENU and ON together. Menu Item Description HEADING ADJ Heading Adjust Sets deviation angle of HEAD mark on hull unit from ship's bow. If deviation is 15° to port, enter "15" (degrees); 15° to starboard, enter "345." BAUD RATE I/F CS-120A Aux Port 1 Aux Port 2 Aux Port 3 NMEA Set data transmission speed (baud) of ports. Set to 2400 bps for I/F CS-120A.
Menu ECHO TEST E/S NET REC DEFAULTS OTHERS Item Description Display Test Checks the display unit without connection of other units. A test pattern is displayed. Demonstration Reserved for future use. E/S Audio Scale Displays depth scale on right or left side of echo sounder display. ES Draft Adjust Sets ship's draft to read true depth on echo sounder display. ES 2 Select Selects equipment connected to ES 2 port; echo sounder or net recorder.
FUNCTION KEYS Similar to the quick dialing function on a telephone, the five function keys (F1–F3) on the main panel record control and menu settings and replay them back exactly as programmed. The items you can program are gain, display mode, TX ON/OFF, USER menu, SYSTEM menu, DATA SET menus and data setting window. The function keys are useful for quickly setting up the sonar for a specific purpose such as seabed detection. Programming the Function Keys 1. Tune the sonar as desired. 2.
USER MENU FUNCTION KEY REGISTER Customized settings are registered to FUNCTION keys. Select key number with↑ ↓ key and press MENU key. Press END key to return to sub menu. 1 Figure 6-2 REGISTER menu 5. Press the up or down arrow key in the sub panel 1 to select the function key to program, then press the MENU key. 6. Press the END key several times to close the menu. Replaying a Function Key Press function key (F1–F3) desired.
Fine Adjustment Item TVG Near TVG Mid TVG Far Tx Cycle -4 -3 -2 -1 0 1 2 3 4 5 -3 -3 -3 0 -2 -2 -2 0 -1 -1 -1 0 0 0 0 0 0 0 0 0 1 0 0 0 1 1 0 0 2 1 1 0 3 2 1 0 4 3 2 0 Tx Beamwidth Tx Power -3 -2 -2 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Function Key Fine Tuning Saving Function Key Settings to a Memory Card 1. Press the MENU key. 2. Select the CARD UTILITY menu. CARD UTILITY Press END key to return to main menu.
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ADVANCED LEVEL OPERATION Finding Fish School Center When you want to find the center depth of a fish school, use the auto tilt function, which automatically scans the tilt angle within the selected width. There are two automatic scan range, WIDE and NARROW, which can be selected by the INIT SET/TEST menu. Note: NARROW in under development.
Tracking a Fish School (target lock) Target lock, which requires speed and heading inputs, automatically tracks an important fish school so that you wonít lose sight of it on the display screen. Two types of target lock are available: Target Mark or Fish. One may be selected on the SYSTEM menu. Tracking a fish school 1. Operate the trackball to place the trackball mark on fish school you want to track. 2. Press the [TARGET LOCK] key to light the lamp above it.
Target lock mark appearance The size and thickness of the target lock mark indicates fish speed and tracking status, as shown below. Target lock mark appearance Meaning Mark size indicates relative speed. Fast Medium Slow (More than 5 Mark thickness shows tracking status. Tx cycles) (Up to 3 Tx cycles) Figure 7-3 Target lock mark appearance Erasing target lock mark Target lock marks may be erased as follows: 1. Open the sub panel 2. 2. Select DELETE MK. 3. Press the [+] key for DELETE MARK FISH.
4. Select Tracking Method, and then press the [MENU] key. 5. Select method desired. 6. Press the [END] key several times to close the menu. Tracking target lock mark 1. Operate the trackball to place the trackball mark on the fish school you want to track. 2. Press the [TARGET LOCK] key to light the lamp above it. The target lock mark ( ) appears on the fish school and tracking begins. Tilt angle is automatically changed to keep the target lock mark location within the sonar beam. 3.
Setting target lock conditions 1. Open the sub panel 1. 2. Press the [MENU] key while pressing and holding down the down arrow key in sub panel 1. 3. Select TARGET LOCK with the arrow keys. 4. Press the [MENU] key. SYSTEM MENU TARGET LOCK Select item with ↑ ↓ ← → keys and press MENU key. Press END key to close menu. Setting Tracking Method TGT Mark Fish Auto Track Echo Color 8 Setting range: 1 to 10 Choose weakest echo to track.
Description of target lock items TrackingMethod Sets target lock function: target lock mark, fish or automatic. Track Echo Color Sets minimum echo signal level to track. A fish school whose signal level is above the level set here is tracked. Fish Speed Limit Sets fish speed at which target lock is cancelled. Fish Track Window Set distance at which to track fish schoolís track when it exits the tracking window. Fish Speed Update Selects update interval of fish speed readout; 5,10, 20 or 30 seconds.
Detecting Fish Schools Aurally Sometimes you may be preoccupied with other tasks and unable to concentrate on watching the sonar picture. In such cases it would be a good choice to use the audio function. This function enables you to monitor echoes from fish schools and seabed through the built-in speaker. After you’ve become accustomed to monitoring fish aurally, you should be able to detect a fish school from a range longer than you can detect it on the screen.
The Fish Alarm The fish alarm sounds an audible alarm when a fish echo above a preset strength enters an alarm zone. You set parameters for the fish alarm at ALM on the data setting window. ON/OFF: Turn alarm on or off. Level: Set echo strength level which will activate the alarm. Zone: Set alarm zone. 1. Open the data setting window and select ALM•AUDIO. 2. Press the + key of the ZONE item. 3. Operate the trackball to place the trackball mark on the starting point of the alarm zone. 4. Press the + key. 5.
Relocating Fish School for Easy Observation 1. Operate the trackball to place the trackball mark on the position where you want to relocate the own ship mark. 2. Press the OFF-CENT key. 3. To move the own ship mark back to the screen center, press the OFF-CENT key again. Press the OFF-CENT key. Fish school Own ship mark Place trackball mark here, for example. Own ship mark moves to trackball mark position.
Comparing of Fish School Concentration You can get an estimate of the volume of two fish schools by using the two ESTIMATE keys. 1. Operate the trackball to place the trackball mark on a fish school, and then press the ESTIMATE 1 key. The estimate mark appears on the fish school. Relative volume is shown by a figure between 0 and 100, below the estimate mark. When inside the mark is filled with reddish brown, volume figure is “100”. 2.
Measuring Fish School Speed To ensure a good haul, it is important to estimate the direction and speed of the fish school before shooting the net. You can do this with the FISH key. If the tidal current data is used together with fish speed data, you can determine the timing of the net shooting more efficiently. This function requires speed and heading inputs. 1. Place the trackball mark on the center of a fish school, and then press the FISH key. The latest fish mark ( ) appears on the fish school. 2.
Note 3: Each time the FISH key is pressed the latest fish mark and ship’s speed mark change in the sequence shown below: Fish key pressed once: ↓ → Fish key pressed twice: ↓ ↓ Fish key pressed three times: X Fish key pressed four times: ↓ ↓ X X → ↓ → The Event Mark The event mark is useful for finding the horizontal range, depth and bearing to a location some distance from current position. This function requires speed and heading inputs.
Entering an event mark 1. Set the trackball mark where you want to place an event mark (latest event mark). 2. Press an EVENT key. The horizontal range, depth and bearing to the event mark appear at the bottom left corner of the screen. →234: Horizontal range (m) from own ship mark ↓19: Present depth (m) to mark (35): Depth (m) of mark at moment EVENT key is pressed. B265: Present bearing (degree) Bottom left-hand corner of screen (35) B You observe picture from direction of mark.
True Motion Display The relative motion display places the own ship mark at the screen center, and echoes from fish and the seabed move on the screen relative to own ship’s movement. This means that even when the ship is dead in water, fish echoes move on the display. In the true motion display, however, stationary objects are fixed and own ship and fish echoes move on the display in accordance with their true courses and speeds.
Plotting Net Location Mark Before shooting net, you will decide the shoot timing considering the water current direction, distance to fish school and moving direction of the fish school. Use the net location mark as a guide to decide the timing. This function requires speed and heading inputs. 1. Place the trackball mark on fish school to be caught. 2. Press the NET COURSE key.
Observing Net Behavior With net sonde connection you can observe net behavior after the throwing of the net, on the echo sounder combination mode. Accurate depiction of net sonde position depends on proper setting of the distances between net sonde transmitters. You can set those distances on NET SONDE XMTR in the DATA SET menu. This function requires speed and heading inputs. 1. Press the SHOOT key just upon throwing the net into the water.
Target Slice Display Using automatic tilting, the target slice mode displays the echo inside the estimate mark at several different tilt angles (depth). To access the target slice display, press the TARGET SLICE key. The table and illustration below describe the target slice mode. No. in Drawing Display Information Applications (1) Echoes inside estimate mark. Show expanded view of fish echoes. (2) Bar graph display of echo signal level distribution for echoes inside estimate mark.
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PORT/STARBOARD, HORIZONTAL SLICE DISPLAYS The port/starboard display or horizontal slice display may be displayed by pressing the [HIST] key. The display shown depends on the setting of “HIST DSP/GRPH” in the USER menu. Port/Starboard display ↓↓ The port/starboard display takes echoes along the bearing (port, starboard) selected on the SYSTEM menu and displays them on the lower 1/3 of the screen.
Horizontal slice display ↓ 120 degrees of the picture in the horizontal direction is shown for a given depth (D) in the horizontal slice window at the bottom of the display. The area to display may be selected with the [R/B] key.
MEMORY CARD OPERATIONS Initializing Memory Cards Before you save information to a memory card it must be initialized (formatted). 1. Press the MENU key to display the USER menu. 2. Select the CARD UTILITY menu. 3. Select Initialize. It takes more than two minutes to initialize a memory card. 4. Press the END key a few times to display the user menu. The memory card stores 256k bytes of data. This is equivalent to about two picture screens or about 20 pictures of echoes inside the estimate mark.
Saving the Picture You can save either the whole screen or the echo inside the estimate mark to the internal memory or a memory card. Data to Save Saving Method Saving to Whole picture, marks, alphanumeric data MEMO key and menu setting Memory card Echo inside estimate mark MEMO key and menu setting Internal memory Net shooting data SHOOT key Internal memory 1. Press the MENU key to display the USER menu. 2. Select SAVE PICTURE. 3. Select item to save: Whole: Saves whole picture to memory card.
Saving Net Shooting Data How net shooting data is saved The unit starts accumulating net shooting data when the SHOOT key is pressed. When net shooting is concluded by pressing the SHOOT key again, the echo inside the estimate mark and other net shooting data are saved to the internal memory. Note however that if ship’s movement between pressings of the SHOOT key is less than 1/3 of the net length the unit judges that net shooting is suspended and does not save net shooting data.
Replaying Saved Data Whole picture or echo inside estimate mark 1. Press the RECALL key (on the main panel). 2. Press the right or left arrow key in sub panel 1 to select item to replay. The left arrow key selects older data (for example, data in memory card); the right arrow key newer (for example, data in internal memory). 3. After viewing picture, press the RECALL key to escape.
TURNING MARKS, DATA ON/OFF You can turn marks and data on or off through the data setting window or the USER menu. Turning marks on/off through the data setting window Select DELETE MK to delete the following marks: Event Mark 1 Event Mark 2 Fish Mark Own Ship Mark Ship's Track Each press of + or – deletes mark selected, one by one. Each press of + or – deletes 1/5 of overall length of track.
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INTERPRETING THE DISPLAY Seabed Echoes When the tilt angle is widened, the seabed echo illustrated below will appear on the display. When the tilt is narrowed, the seabed trace becomes wider and weaker. By observing the seabed condition on the display, the skipper can prevent net damage. (A) Flat seabed Tilt angle: 10° to 15° Narrow tilt angle Only half of vertical beam width captures the seabed.
Fish Schools A fish school appears as a mass of echoes on the screen. The color of the mass shows the density of fish schools on the sonar beam. To find distribution and center point of a fish school, try several different tilt angles. (A) Sea surface fish Tilt angle: -5° to 10° Fish school Seabed echo not displayed because of narrow tilt angle. Sea surface reflections are present.
Sea Surface Reflections To reduce sea surface reflections, set the tilt angle to 5° or higher, so the upper edge of the sonar beam does not hit the sea surface, or adjust TVG. When a narrow tilt angle is used, sea surface reflections cover a large area as illustrated below. Sea surface Tilt angle indication 15° Sea surface reflections Sea surface 15° Figure 11-3 Sea surface reflections Wake A wake produced by own ship or another ship can be a strong reflecting object when a narrow tilt angle is used.
False Echo by Sidelobe An ultrasonic wave is emitted only in the direction set by the TILT lever, however there are some emissions outside the main beam. These are called sidelobes. The energy of the sidelobe is fairly weak but when the water is comparatively shallow and the bottom is rocky and hard, strong signals are detected by the sidelobe. These are represented on the display as a false echo as shown below.
WARNINGS Overvoltage Warning If the input voltage to this unit rises above 125 VAC, the overvoltage detection circuit activates, an alarm sounds and the message OVERVOLTAGE appears at the screen center. If this occurs, retract the transducer, turn the power off and check the ship’s mains voltage. It should be about 100 VAC.
Reset Button Breaker Main Shaft Raise/Lower Control Box Hand Crank Hull Unit Figure 12-1 How to manually raise the transducer 12-2
SELF TESTS The CSH-23/24 has various self tests to check it for proper operation. If a test reveals equipment malfunction do not attempt to check inside the equipment. There are no user serviceable parts inside the equipment. WARNING Do not open the cover. There are no user-serviceable parts inside. Refer any repair work to a qualified technician. Opening the Self Test Menu 1. Turn on the power while pressing and holding down the MENU key. 2. Press arrow keys to select SELF TEST.
Self Test Description Single test The ROM, RAM and other devices of the display unit are checked once. Control is returned to the SELF TEST menu when the test is completed. START UP TEST DCON 105-0574-2xx ROM = OK RAM = OK DPRAM = OK P.
Panel test This test checks the keys of the main and sub panels and the remote control box. Press and release each key. Its on-screen location should display “1” when the key is pressed and “0” when released. To escape from the test reset the power. PANEL TEST / X = Y = Figure 13-4 Panel test Color test This test checks for proper display color. To escape from the test reset the power.
Gray test This test checks for screen distortion. To escape from the test reset the power. GRAY TEST ¢, Q , ¢ Q Figure 13-6 Gray test SIO test This test checks for proper communication between the display unit and transmitter unit, and requires a jumper plug. To escape from the test reset the power.
Interface Unit CS-120A Self Test 1. Open the cover of the interface unit. 2. Find DIP switch DP-1 on the lone circuit board. Turn switch #6 on to start the self test. The results of the check appear on the digital display beside the DIP switch. 3. Turn the DIP switch off after completion of the test. Digital display Turn #6 on. 6 7 8 6 7 8 If the readout shows "0" the unit is functioning properly. If it is not working properly any of the following nine numerals or six alphabets appear.
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INPUT DATA SELECTION Selection of Data at Interface Unit CS-120A Nav data and fish data input from external equipment can be turned on or off at DIP switch DP-1 in the Interface Unit CS120A. Ship's speed and bearing (for track plotting, true motion, target lock, etc.) Input Device ON 1 S2 Gyrocompass, Speed log OFF OFF GPS or DR (Note 1) ON OFF Current Indicator OFF ON DR or Current Indicator (Note 2) ON ON Select navigation which feeds nav data for drawing ship's track by switch S1 and S2.
Setting Distances Between Net Sonde Transmitters To accurately display the net shooting mark and net sonde mark position, the distance between transmitters must be correctly set. This is done on the DATA SET menu. R0: Length of net from its end to transmitter1 in meters. R1: Length of net between transmitters 1 and 2 in meters. R2: Length of net between transmitters 2 and 3 in meters. R1 R2 R0 Figure 14-2 How to measure distances between transmitters How to set net sonde transmitter distances 1.
MAINTENANCE WARNING Do not open the cover. There are no user-serviceable parts inside. Refer any repair work to a qualified technician. Display Unit Maintenance Handle the equipment with care. Damage can cause corrosion. Clean the screen and filter regularly. Cover the equipment when it is not in use. An anti-static spray may be used to clean the screen. Do not use chemical-based cleaners; they can remove paint and markings. Keep heater away from the equipment.
Hull Unit Maintenance Apply MOLYTONE grease #2 every six months. Raise transducer and coat main shaft with DAPHAECOROAEX #2 every six months. CAUTION The zinc block near the transducer must be replaced yearly. The junction between the transducer and main shaft may corrode, which can result in loss of the transducer or water leakage inside the ship. HULL UNIT Dry dock ship and clean transducer face yearly.
MENU TREE USER Menu USER MENU List Execute Save Execute Delete Execute Initialize Execute CARD ECHO DAT Save Execute CARD NET DATA Save Execute FUNCTION KEY Register Execute DATA DISPLAY Event Mark 1 ON OFF Event Mark 2 ON OFF Fish Mark ON OFF On Track Data Depth Temp OFF Text Window ON ES Window Current Sonde Range/Bearing ON OFF Heading Mark ON OFF Range Rings ON OFF Bearing Scale ON OFF Auto Scan Width ON OFF Ship's Track ON OFF Net Movement Plot ON O
DATA SET Menu DATA SET MENU COLOR CURVE CHANGE COLOR NET SHOOT PLAN NET SONDE NET PLOT CORR Sonar 1 Execute Sonar 2 Execute Echo Sounder 1 Execute Echo Sounder 2 Execute Sonar 1 Execute Sonar 2 Execute Echo Sounder Execute Marks Execute Menu Execute Net Diameter Setting range: 200-1000 m Tilt Interlock ON Net Sonde XMTR Execute (Qty plus distances) Net Length Setting range: 0-3000 m Wire Length Setting range: 0-1000 m Net Width Setting range: 0-200 m Layer 1 Layer 2 Layer
INIT SET/TEST Menu INIT SET/TEST MENU HEADING ADJ Heading Adjust Setting range: 0°-359° BAUD RATE I/F CS-120 2400, 4800 bps Aux Port 1 2400, 4800 bps Aux Port 2 2400, 4800 bps Aux Port 3 2400, 4800 bps NMEA 4800, 9600 bps KP Out Polarity Negative Positive EXT KP Polarity Negative Positive Depth Meter Feet Fathom Passi Dist for Shoot Mile Meter Feet Water Temp °C Language English Japanese Korean Single Execute Continuous Execute Panel Execute Color Execute Gray Execute
SYSTEM Menu SYSTEM MENU SIGNAL PROCESS Smooth Echo - - - Rng Setting range: 0 to 3 Smooth Echo - - - Cir Setting range: 0 to 3 Delete Color Setting range: 1 to 10 FAR TVG Far TVG Curve 25log 30log 35log 40log TM DSP TM Display Range 1.3R 1.
SYSTEM MENU HIST DISPLAY (Continued from previous page) INTERLOCK DEFAULTS H-Slice Width 1 2 3 4 PRT/STBD Sample Setting range: 0°-180° Tilt ON OFF Range ON OFF Event Mark ON OFF Fish Mark ON OFF Net Shoot Mark ON OFF Target Lock ON OFF Defaults Execute A-5
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SPECIFICATIONS Model: CSH-23/24-M 1 (Freq.: 24 kHz) 2 (Freq.: 28 kHz) 3 (Freq.: 32 kHz) 4 (Freq: 40LkHz) 5 (Freq: 40HkHz) 6 (Freq: 45 kHz) 1. GENERAL (1) Range, TX Cycle, Pulselength Basic Range Range (m) TX Cycle (sec) Pulselength (msec) Off center "OFF" Off center "ON" 60 0 - 60 0 - 80 0.09 - 0.32 0.5 - 1.5 100 0 - 100 0 - 133 0.14 - 0.39 0.5 - 2 150 0 - 150 0 - 240 0.21 - 0.53 0.5 - 3 200 0 - 200 0 - 320 0.28 - 0.64 0.5 - 4 300 0 - 300 0 - 480 0.41- 0.85 0.
(3) Transceiver Transmitter High power MOS FET amplifier with 10-step power reduction switch Receiver Low noise superheterodyne, continuously scanning beam form ing, TVG, AGC, signal/processing, interference rejecter, hori zontal verticalbeam switching. (4) Beamwidth (-3 dB) and Tilt Angle TX Beamwidth 360° (horizontal) x 10° to 13° (Vertical) RX Beamwidth 8° to 16° (horizontal) x 11° to 14° (Vertical) Tilt Angle -5° (upward) to 60° (downward), continuous.
(6) Features Custom mode, interference rejector, afterglow, noise limiter, delete color, memory card (save and recall of picture, echo inside estimate mark and net shooting data), automatic tilt, automatic target tracking *(target lock), external KP sync, heading up, north up*, fish alarm, overvoltage warning, unretracted transducer warning, remote control *: External sensor required. 3.
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INDEX A N AGC ................................................................ 3-3 2AGC .............................................................. 3-3 AUDIO ........................................................... 7-5 DATA SET Menu ........................................... 5-8 Data Setting Window ..................................... 1-5 Display Mode ................................................. 2-2 Nav Data ......................................................... 4-6 Net Behavior ........
