All rights reserved. All rights reserved. Printed in Japan Printed in Japan PUB.No. PUB.No. OME-13050 OME-13050 ( ( DAMI DAMI ) ) CSH-23F/24F CSH-23F/24F Your Local Agent/Dealer Your Local Agent/Dealer FIRST EDITION : FIRST EDITION : NOV. NOV. 1997 1997 : APR.
10 years. Replace it when the picture be- comes difficult to see, to protect vision. A warning label is attached to the equip- ment. Do not remove the label. If the label becomes soiled or illegible, contact a FURUNO agent or dealer.
TABLE OF CONTENTS FOREWORD A Word to CSH-23F/24F Owners ... vii Features ... vii System Configuration ...viii CONTROL DESCRIPTION Control Layout on Display Unit and Remote Control Box ...1-1 Main Panel ... 1-2 Sub Panel 1 ...1-4 Sub Panel 2 (data setting window) ...1-5 Remote Control Box ...1-8...
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 ...6-3 Replaying Function Key Settings from a Memory Card ...6-3 ADVANCED LEVEL OPERATION Finding Fish School Center ...7-1 Tracking a Fish School (target lock) ...7-2 Detecting Fish Schools Aurally ...7-7 The Fish Alarm ...7-8...
WARNINGS Overvoltage Warning ...13-1 Unretracted Transducer Warning ...13-1 SELF TESTS Opening the Self Test Menu ...14-1 Self Test Description ...14-2 Interface Unit CS-120A Self Test ...14-5 INPUT DATA SELECTION Selection of Data at Interface Unit CS-120A ...15-1 Setting Distances Between Net Sonde Transmitters ...15-2 MAINTENANCE Display Unit Maintenance ...16-1 Hull Unit Maintenance ...16-2...
A Word to CSH-23F/24F Owners Congratulations on your choice of the FURUNO CSH-23F/24F 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 qual- ity marine electronics equipment.
CONTROL DESCRIPTION Control Layout on Display Unit and Remote Control Box DISP SELECT EVENT TGT LOCK ESTIMATE NET COURSE FISH OFF- CENT – – GAIN RANGE AUTO TRAIN POWER TRANSDUCER NORM HIST RECALL RANGE TARGET VERT SCAN SLICE SHOOT TILT SCAN DEPTH TARGET COURSE...
Main Panel ] - [ POWER TRANSDUCER NORM HIST RECALL RANGE GAIN VERT TARGET SCAN SLICE SHOOT TILT SCAN DEPTH TARGET COURSE LOCK CONT EVENT1 EVENT2 ESTI- ESTI- MATE1 MATE2 OFF- FISH CENT Figure 1-2 Main panel Main panel control description .
MENU Opens/closes the menu. • 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.
Sub Panel 2 (data setting window) ITEM (TVG•TX selected) TVG•TX SIGNAL DELETE MK SONR•BEAM AUTO ALM•AUDIO OPER P-SET (TOGGLE) Item selection keys Select item. OPER P-SET key Opens/closes data setting window. Item Main Item Main TVG•TX TRANS- (Continued on next page) CURRENT SETTINGS for item selected (TVG•TX) NEAR MEDIUM...
Remote Control Box elects which display unit to ontrol in multiple display unit stallation. ises/lowers the transducer. : Raises transducer. : Mid protrusion : Full protrusion Press to enter mark shown on key or shift screen center. Selects display range. Adjusts receiver sensitivity.
OPERATIONAL OVERVIEW Turning the Power On/Off Adjusting Screen Brilliance, Control Panel Backlighting Lowering the Transducer Press d or switch. The lamp above the switch blinks during lowering of the trans- ducer and lights when the transducer is completely lowered. In normal use fully lower the transducer.
Selecting a Display Mode Mode NORMAL HISTORY The CSH-23F/24F 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 The sonar picture appears over the entire screen.
Selecting a Display Range Setting the Tilt Angle Operate the RANGE control to select a display range. The range selected appears at the top center of the screen. The tilt angle shows the direction to which the sound wave is emitted.
Case 2 Figure 2-1 Fish echo and tilt angle Points to consider • Normally, a vertically distributed fish school is a better sonar target than the seabed, because it reflects the transmitted pulse back toward the transducer. • In case 3, both fish schools a and b are presented. Gener-...
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.
(200) 20(40) 40(80) 60(120) 80(160) 100(200) 200(400) Vertical width of sonar beam 100 m 100 m 15° 26 m 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 Measuring Range and Bearing to a Target 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.
While it is ideal to suppress seabed echoes with the AGC con- trol alone there are some fishing grounds where this is not pos- sible. (The high power sonar has the advantage of long-range detection but this can also be a disadvantage, since weaker ech- oes may be hidden in strong, unwanted echoes such as the sea- bed.)
Figure 3-2 How to suppress seabed and sea surface reflections in shallow waters While observing the sonar picture, you may encounter occasional or intermittent noise and interference. These are mostly caused by on-board electronic equipment, engine or propeller noise, or electrical noise from other sonars being operated nearby.
CYCLE) When other sonars operate nearby at the same transmission in- terval as that of own ship’s sonar, an interference ring caused by other sonars is displayed. To erase the interference ring from the screen, reduce the CYCLE on the data setting window.
Adjusting Beamwidth 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...
Normal display mode w/text Echo sounder combination display Figure 4-2 Marks and data appearing in the normal display mode w/text Figure 4-3 Marks and data appearing in the echo sounder combination display mode...
Accordingly, both are equal when target lock is on. In automatic tilt, the upper indication shows the tilt angle set by the TILT lever and the lower indication the instantaneous tilt angle at which the sonar actually works. (Continued on next page)
This mark moves with ship’s movement in the * true motion mode. On all other modes it is fixed at the screen center. When the CSH-23F/24F is connected to a gyrocompass the mark is * North Mark calledthe north mark and points North. If there is no gyrocompass (or Heading Mark) input it is the heading mark and points in the direction of own ship’s...
Mark/Data Latest Fish Mark These marks are inscribed on the screen by pressing the FISH key. Ten fish marks can be entered. Each time the key is pressed the fish mark appearance changes on the screen as follows: Fish Mark 1st press of FISH key 2nd press of FISH key Fish Mark...
Mark With gyrocompass or speed log connection, own ship’s track is plotted *Ship’s Track Mark by a solid line. When the length of the line exceeds five times the range the oldest part of the track is erased. This mark can be displayed with current indicator input. The tidal *Tidal current marks are displayed on the net shooting mark ( Current...
Mark Target Lock Mark The target lock mark automatically tracks the fish school selected by the operator. This function requires speed and gyrocompass inputs. Net Shooting Mark Press the SHOOT key at the instant you shoot the net to display the net shooting mark on the display.
MENU OVERVIEW Menu USER SYSTEM DATA SET INIT SET/TEST USER Menu Operation 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.
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.
The function keys are useful for quickly setting up the so- nar for a specific purpose such as seabed detection. 1. Tune the sonar as desired. 2. Press the MENU key. 3. Select the FUNCTION KEY menu and press the MENU key.
Replaying a Function Key Function Key Fine Tuning FUNCTION KEY USER MENU Customized settings are registered to FUNCTION keys. Select key number with key and press MENU key. Press END key to return to sub menu. Figure 6-2 REGISTER menu 5.
Fine Adjustment Item TVG Near TVG Mid TVG Far Tx Cycle Tx Beamwidth Tx Power Saving Function Key Settings to a Memory Card Replaying Function Key Settings from a Memory Card Function Key Fine Tuning 1. Press the MENU key. 2.
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.
Tracking a Fish School (target lock) Target lock, which requires speed and heading inputs, automati- cally tracks an important fish school so that you wonít lose sight of it on the display screen. Two types of target lock are avail- able: Target Mark or Fish.
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 Mark size indicates Fast relative speed. Medium Slow Mark thickness shows (More than 5 tracking status.
Tilt angle is automatically changed to keep the target lock mark location within the sonar beam. 3. To stop tracking, press the [TARGET LOCK] key again. Note 1: If the target goes out of the picture or the tilt angle is greater than 60 degrees the lamp above the [TARGET LOCK] key flashes to call your attention.
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...
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.
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.
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.
Relocating Fish School for Easy Observation Place trackball mark here, for example. 1. Operate the trackball to place the trackball mark on the posi- tion 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.
Comparing of Fish School Concentration 7-10 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.
Measuring Fish School Speed Latest fish mark 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.
The Event Mark 7-12 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: Fish key pressed four times: The event mark is useful for finding the horizontal range, depth and bearing to a location some distance from current position.
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 bear- ing to the event mark appear at the bottom left corner of the screen.
Open the data setting window and select SONR•BEAM. Set UP/ TM in the SONAR menu to TM. This function requires speed and heading inputs. Although the true motion mode is available for use in all modes, use in the combination mode is not recommended since the own ship mark may move into the combination picture area.
Plotting Net Location Mark Before shooting net, you will decide the shoot timing consider- ing the water current direction, distance to fish school and mov- ing direction of the fish school. Use the net location mark as a guide to decide the timing. This function requires speed and heading inputs.
Observing Net Behavior 7-16 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 set- ting of the distances between net sonde transmitters. You can set those distances on NET SONDE XMTR in the DATA SET menu.
Target Slice Display e f f 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.
The fig- ure below illustrates the concept of the vertical scanning mode, in comparison with the normal sonar beam. The vertical scan- ning mode helps you keep fast moving fish such as bonito and tuna within the sonar beam.
Tracking of bonito and tuna presents a special challenge to the sonar operator: He must try to keep them within the sonar beam, a formidable task considering their high speed and penchant for leaping and diving. The CSH-23F/24F, however, with its wide vertical scanning beam, makes this task easier. Searching...
SYSTEM menu and displays them on the lower 1/3 of the screen. If the bearing width is set to 90 degrees, for example, the CSH-23F/24F displays echoes in both port and starboard directions. The picture is scrolled vertically to downward.
Range Mark Horizontal Slice Width Cross Cursor Own Ship Mark 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 bot- tom 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 initial- ized (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.
Saving the Picture Transferring Echo Data from Internal Memory to Memory Card 10-2 You can save either the whole screen or the echo inside the esti- mate mark to the internal memory or a memory card. , e r i t s 1.
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.
Replaying Saved Data Deleting Memory Card Contents 10-4 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);...
TURNING MARKS, DATA ON/OFF User Menu 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 Each press of + or –...
INTERPRETING THE DISPLAY Seabed Echoes (A) Flat seabed Tilt angle: 10 to 15 (B) Flat seabed Tilt angle: 20 or more (C) Sloping seabed Tilt angle: 20 or more When the tilt angle is widened, the seabed echo illustrated be- low will appear on the display.
12-2 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.
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.
Figure 12-5 Sidelobe echoes Interference from a sonar on another ship appears on the screen as shown in (A) below. This interference can be suppressed by changing the CYCLE setting in TVG•TX on the data setting window. Interference from electrical equipment on board own ship appears as shown in (B) below.
WARNINGS Overvoltage Warning Unretracted Transducer Warning If the input voltage to this unit rises above 125 VAC, the over- voltage detection circuit activates, an alarm sounds and the mes- sage OVERVOLTAGE appears at the screen center. If this occurs, retract the transducer, turn the power off and check the ship’s mains voltage.
SELF TESTS Opening the Self Test Menu The CSH-23F/24F 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.
Panel test This test checks the keys of the main and sub pan- els 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.
Gray test This test checks for screen distortion. To escape from the test reset the power. 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. 14-4 GRAY TEST Figure 14-6 Gray test...
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.
INPUT DATA SELECTION Selection of Data at Interface Unit CS-120A Ship's speed and bearing (for track plotting, true motion, target lock, etc.) Gyrocompass, Speed log GPS or DR (Note 1) Current Indicator DR or Current Indicator (Note 2) Note 1: GPS has priority. Switched automatically from GPS to DR when Standard GPS data is absent for more than 61 seconds or ship's speed measured with setting...
Setting Distances Between Net Sonde Transmitters 15-2 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. Figure 15-2 How to measure distances between transmitters How to set net sonde transmitter distances 1.
MAINTENANCE Display Unit Maintenance 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 magnets and cassette tapes away from the display unit.
Hull Unit Maintenance 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. 16-2 Apply MOLYTONE grease #2 every six months.
MENU TREE USER Menu USER MENU CARD UTILITY CARD ECHO DAT CARD NET DATA FUNCTION KEY DATA DISPLAY MARK DSP 1 MARK DSP 2 HIST DSP/GRPH CURRENT VEC SAVE PICTURE List Execute Save Execute Delete Execute Initialize Execute Execute Save Save Execute Register...
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...
INIT SET/TEST Menu INIT SET/TEST MENU HEADING ADJ BAUD RATE EXT KP UNIT/LANGUAGE SELF TEST ECHO TEST ES/NET REC DEFAULTS OTHERS Heading Adjust Setting range: 0°-359° 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...
Normal Large Largest Course 32 Cmps 360 True Current Data Event Mark Other Marks Control Setting OFF Sonar TGT Lock Text Window Data 1 2 3 4 Trackball Mark +(S) +(L) Target Lock Mark Event Mark 1 Event Mark 2...
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 Range Event Mark Fish Mark Net Shoot Mark Target Lock Defaults Execute...
SPECIFICATIONS Model: CSH-23F/24F-M 1. GENERAL (1) Range, TX Cycle, Pulselength " r " F NOTE 1) Transmission cycle is selectable in 10 steps. 2) External keying pulse can be used as a trigger. 3) Maximum range scale does not mean maximum range.
9 to 18 (horizontal) x 13 to 16 (vertical) -5 (upward) to 60 (downward), continuous. NOTE: Beamwidth depends on transmitter frequency. CSH-23F: PPI display on 15 inch non-glare, high-resolu- tion color CRT CSH-24F: PPI display on 21 inch non-glare, high-resolu-...
(6) Features 3. HULL UNIT i s i Navigation data *(ship’s speed, heading, water depth, water temperature), Own ship’s position *(latitude/longi- tude), Net sonde data *(net depth, distance to seabed, water temperature, sinking speed of net) Custom mode, interference rejector, afterglow, noise lim- iter, delete color, memory card (save and recall of picture, echo inside estimate mark and net shooting data), auto- matic tilt, automatic target tracking, *(target lock), external...