Furuno CH-270 manual

COLOR LCD SEARCHLIGHT SONAR CH-270 OPERA T OR'S MANU AL www .furuno .co .jp MODEL Back[...]

The paper used in this manual is elemental chlorine free. ・FURUNO Authorized Distributor/Dealer 9-52 Ashihara-cho, Nishinomiya, 662-8580, JAPAN Telephone : +81-(0)798-65-2111 Fax : +81-(0)798-65-4200 A : JUN 2003 . Printed in Japan All rights reserved. D : JUN . 03, 2010 Pub. No. OME-13220-D *00014699513* *00014699513* ( DAMI ) CH-270 * 000146995[...]

i IMPORT ANT NOTICES • This manual is int ended for use by nat ive speakers of English. • No part of this m anual may be copied or reproduced witho ut written permission. • If t his manual is lost or worn, contact your dealer about replac ement. • The contents of t his manual and equipm ent s pecif ications are subj ect to change without no[...]

ii SAFETY INSTR UCTIONS WARNING ELECTRICAL SHOCK HAZARD Do not open the equipment. Only qualified personnel should work inside the equipment. Immediately turn off the power at the switchboard if water leaks into the equipment or something is dropped in the equipment. Continued use of the equipment can cause fire or electrical shock. Contact a FURUN[...]

iii CAUTION Do not exceed 20 knots when operating the equipment and do not exceed 15 knots when lowering or raising the transducer. The transducer shaft may become damaged. Do not use the equipment for other than its intended purpose. Wrongful use of the equipment may result in personal injury or damage to the equipment. TFT LCD The high quality TF[...]

iv T ABLE OF CONTENTS FOREWOR D ....................................................................................................................... v i i SYST EM CON FIGURAT ION ............................................................................................ ix 1. OPERA TIONA L OVERVIEW ..............................................[...]

T AB LE OF CO NTE NTS v 2.13 Ho rizontal Menu Overvi ew ....................................................................................... 2-23 2.14 Interpre tin g the Hori zo ntal Di spla y ........................................................................... 2 -25 2.14.1 How the h oriz onta l mode pi cture is pa in ted ................[...]

T AB LE OF CONT ENT S vi 4.10.4 Re soluti on col or .............................................................................................4-11 4.10.5 Suppressing clutter ........................................................................................4-12 5. M ENU OPERA TION ............................................................[...]

vii FOREWORD Thank you for purchasi ng the CH-270 Color LCD Searchlight Sonar . We are confident you will discover why FURUNO has becom e synonymous with qualit y and reliabilit y . Dedicated in t he design and m anufacture of marine electron ics equipment for more than half a cent ury , F URUNO Electric Company has gained an unri valed reputation [...]

FOREW ORD v iii Usage Prec autions • The Motion Se nsor MS-100 com pensates for ship’s pitching and rollin g. However , it does not compensat e for load unbalance. Use Clin om eter BS-704 if compensation f or load unbalance is required. • If the equipm ent will not be used f or a long time, shut of f the power to it at t he mains switchboard [...]

ix SYSTEM CONFIGURA TION CH-270 (350 stroke) HULL UNIT SPEAKER DA T A/VIDEO OUT MOTION SENSOR 12-32VDC 12-32 VDC Speaker Motion Sensor External Monitor Control Unit Display Unit Navigator CONTROL UNIT CH-252 DISPLA Y UNIT MU-100C TRANSCEIVER UNIT CH-273 INTERF ACE UNIT IF-8000 Remote Controller HULL UNIT CH-181 12/24 VDC Note 1: The CH-270 is suppl[...]

SYST EM CONFI GURA TION x CH-270 (250 stroke) HULL UNIT SPEAKER DA T A/VIDEO OUT MOTION SENSOR 12-32VDC 12/24 VDC 12-32 VDC Speaker Motion Sensor External Monitor Control Unit DIsplay Unit Navigator DISPLA Y UNIT MU-100C TRANSCEIVER UNIT CH-273 INTERF ACE UNIT IF-8000 Remote Controller : Standard : Option : Local Supply CONTROL BOX CONTROL UNIT CH-[...]

1-1 1. OPERA TIONA L OVER VIEW 1.1 Control Description T ur ns the power on/off . Lowers the tr ansducer . Adjusts receiver sensitivity . Chooses center bearing of training sector . Chooses detection range. Controls tilt angle. Selects center direction of the vertical scanning sector . Omnipad Shifts cursor . Selects menu items, options . Opens/clo[...]

1. OPER A TIONAL OVERVIEW 1-2 1.2 Remote Controller The Remot e Controller CH-256 (option) pro vides arm chair control over range, tilt, target lock and training range. Choose tilt angle. Enables/disab les target lock. Chooses training range . f or full circle 360 (horizontal mode) or half circle 180 (v er tical scan mode). Choose displa y range. R[...]

1. OPERA TION AL OVERVI EW 1-3 1.3 T urning the Power On/Off 1.3.1 Po wer on Press the [POW ER] switch on the control unit unt il you hear a “click.” A beep sounds, the lamp above the s witch lights and the startup displa y appears (for four seconds). MODEL : CH-270 180kHz S tartup display Note 1: Wait at least five seconds bef ore reapplying t[...]

1. OPER A TIONAL OVERVIEW 1-4 1.3.2 Po wer off 1. Press the [ © ] switch on the cont rol unit. The lamp above the switch bli nks while the transducer is being rais ed and lights steadil y when it is fully raised. 30 25 T ransducer status indicator • Up arrow is filled when transducer has been retracted into the tank. • Down arrow is filled whe[...]

1. OPERA TION AL OVERVI EW 1-5 1.4 Rais ing, Lo w ering the T ransduce r 1.4.1 Lowering the transducer W ith the boat at the fishing ground, press the [ ª ] switch to lower the transducer . The lamp above the switch bli nks while the transduc er is being lowered and lights when it is completely lowered. The do wn arrow on the transducer status ind[...]

1. OPERA TIONAL OVERVIEW 1-6 1.5 Choosing a Display T hi s s onar has ei ght di spl ay modes and y ou may choos e one w it h one of t he DI SP LA Y M O DE key s. Refer t o t he chapt er s how n in t he illus tr atio n fo r m o re in for ma tio n a bo u t e ac h mode. W ater temp/depth Key Ke y VERTICAL SCAN V er tical section of underwater conditio[...]

1. OPERA TION AL OVERVI EW 1-7 1.6 A djusting Screen Brilliance, Panel Dimmer Screen brilliance can be adjusted in nine le vels and the panel dimm er (backlighting) in f our . 1. Press the [BRI LL] key to open the dialog bo x for screen brilliance and panel dim mer . Do the next step within four seconds; ot herwise the dialog b ox will be erased. D[...]

1. OPER A TIONAL OVERVIEW 1-8 1.8 Basic Menu Op eration The menu, consisting of seven menus, mostly contains items which once preset do not require frequent adjustm ent. Below is the procedure f or basic m enu operation. 1. Press the [MENU] key to open the m enu. The last-used menu is displa yed. (In the example belo w , the COM2 m enu is shown.) N[...]

2-1 2. HORIZONT A L MODE 2.1 Oper ational Over view T he fi gure below show s t he t y pi c al hori zont al mode operat i ng s equenc e. 2. Lower the transducer . 9. Adjust gain. 6(a). Set scanning sector . 7. Set center bearing of train sector . 5. Set range. 8. Set tilt angle. 3. Adjust screen brilliance. 6(b). Select training sector f or full ci[...]

2. HO RIZO NT AL MODE 2-2 2.2 T y pical Horizont al Mode Di s play 25 R 40 m T 40 16 13 B208 + CSE 357 SPD 9.9 kt DEP 35 m TMP 12.3 C CUR 11.0˚ 2.0 kt GAIN 5.3 TV G LEVEL 4.0 DIST ANCE 200 m COLOR 34 12. 343' N 134 34. 213' W 9 8 B7 16 B234 Cursor data T rain indicator Sector marker Range Tilt angle Tilt angle indicator (Indicates transd[...]

2. HORI ZONT AL MO DE 2-3 2.3 Choosing the Range The [RANGE] control chooses the detection (di splay) range. Cho ose the range according to either the f ish species being searched or the dept h desired. 15 ranges are ava ilable. SEA SURFACE Range indicated on the screen. BOTTOM SEA SURF A CE Range indicated on the screen. BO TT OM How to choose the[...]

2. HORI ZONT AL MO DE 2-4 2.4 Choosing Sector W id th Sector means t he w idth of the t ransducer training. The [SECTOR] control chooses the training (dis play) area am ong the sixteen positions sho wn in the table below . Clockwise rotation of the cont rol increases the sector width; counterclock wise rotation decreases it. 96 ° Display sector (s[...]

2. HORI ZONT AL MO DE 2-5 2.5 Choosing T rain Center The [TRAI N] control chooses the center direct ion of the detection range. The range of adjustm ent is 0 ° to 354 ° in increments of 6 ° . The chosen bearing is shown with a f illed circle, the tr ain indicator , on the bearing scale. 0 (360 ) → 6 → 12 → 18 → ... 354 Train indicator Se[...]

2. HORI ZONT AL MO DE 2-6 2.6 Choosing the T ilt A ngle 2.6.1 Choosi ng the tilt angle The tilt angle sho ws the direction t o which the sound wave is em itted. W hen the sound wave is emitt ed horizontally , the tilt angle is sai d to be 0 ° and when emit ted vertically , 90 ° . T o set a t ilt angle, opera te the [TIL T] cont rol. Wa t ch the t[...]

2. HORI ZONT AL MO DE 2-7 2.6.2 Rel ation between tilt angle and echo Refer t o the illustration below to see the relat ion bet ween tilt angle and bot tom echo. Case 1: Tilt angle 30 ° ° ° ° to 40 °: °: °: °: T his tilt angle will displa y the entire botto m since it is captured by the f ull width of the beam. Case 2: Tilt angle 10 ° ° ?[...]

2. HORI ZONT AL MO DE 2-8 Point s t o cons ider • Norm ally , a vertically dist ributed fish school is a bet ter sonar target than the bot tom, because it ref lects the transmitt ed pulse back toward the transducer . • In case 3, both fish schools “a” and “b” are presented. G enerally speak ing, however , mid w ater f ish schools tend t[...]

2. HORI ZONT AL MO DE 2-9 2.6.4 Suit able tilt angle The figure belo w illustrates t he relationship am ong tilt angle, depth an d detection rang e. Refer t o it to find out the suitable tilt angle for a given depth/ detection range. 100 (200) 200 (400) 300 (600) 400 (800) Range (m) 0 ° 5 ° 10 ° 15 ° 20(40) 40(80) 60(120) 80(160) 100(200) 200(4[...]

2. HORI ZONT AL MO DE 2-10 2.7 Choosing the T raining S pee d The training spee d determ ines how fast the transducer scans the sound ing sector . T wo choices are availab le, normal speed and hig h speed, and one m ay be chosen with the [F AST SCAN] key . Each ti m e the key is pressed, “NORM” (normal speed) or “F AST” (high speed) mom ent[...]

2. HORI ZONT AL MO DE 2-1 1 2.9 Ev ent Mar ker The event m arker functions to m ark important locations on the screen, and f ive may be inscribed. Each tim e the [EVENT] key is pressed the “latest event m arker” ( ⊕ ) is inscribed at the cursor location an d all previously entered eve nt m arkers are shown by the “previous event marker” ([...]

2. HORI ZONT AL MO DE 2-12 2.9.2 Deleting all event markers All event markers can be erased f rom the screen as follows: 1. Operate t he Omnipad to place the cursor outside the displa y area. 2. Press the [EVENT] key to show the following dialog bo x. Do the next step within four seconds; other wise the dialog bo x will be erased. DELETE EVENT MARK[...]

2. HORI ZONT AL MO DE 2-13 2.1 1 Adjusting the Picture 2.1 1.1 Suppressi ng bottom and surface reflections In shallow fishing groun ds, excessive sea surface and bot tom reflect ions often interfere with wanted f ish echoes and they cannot be eli minat ed sufficiently with the TVG controls. In such cases, tr y to reduce the output power , without t[...]

2. HORI ZONT AL MO DE 2-14 2.1 1.2 Suppressi ng bottom t ail As described earlier , fish schools near the botto m are sometimes difficult to detect because you have to di scriminate f ish echoes from the bottom reflections. T o discriminat e fish echoes near t he bottom, choose t he short Tx pulselen gth on the C OM1 menu to decrease the tail of bo[...]

2. HORI ZONT AL MO DE 2-15 T o ad just TVG : 1. Press the [MENU] key to open the m enu. 2. Press ▲ to choose MENU and then press ◄ or ► to choose HORZ. TVG LEVEL 4. 0 TVG DISTANCE 4. 0 GAIN ADJUST 0 RES. COLOR LO G CLUTTER 0 TARGET KEY REVERSE : SELECT : CHANGE MENU: END MENU COM1 VERT ES PRESET S Y S COM2 HORZ LOCK MODE AUTO AUTO TILT OFF HO[...]

2. HORI ZONT AL MO DE 2-16 5. Press the [MENU] key to register your selection and close the m enu. 6. T o suppress reflections f rom the sea surface or plankton, choose TVG LEVEL and then press ► . 4.0 200 m TVG LEVEL Hi Lo GAIN 7. Press ◄ or ► to adjust TVG LEVEL, considering sea condit ions. The setting range is 0 to 10, however a setting b[...]

2. HORI ZONT AL MO DE 2-17 2.1 1.4 Erasing weak echoes Weak echoes such as interference can be erased f rom the screen. This is useful when you want to observe a f ish school echo. 1. Press the [MENU] key to open the m enu. 2. Press ▲ to choose MENU. 3. Press ◄ or ► to choose COM2. DELETING TRACK NO WHITE MARKER OF F SIG LEVEL OF F COLOR 16 B[...]

2. HO RIZO NT AL MODE 2-1 8 2. 1 1.5 Enl a rgi ng f i sh ech oes (h or izo nt al exp an si on d isp lay ) Fi sh echoes m ay be enlarge d by usi ng the hor i zont al exp ansi on di spl ay . Press t he key to s how the hori zont al exp ansi on di s pl ay . The di r ec t i on of exp ansi on de pe nds on t he trai n di rect i on as s how n i n the t ab[...]

2. HORI ZONT AL MO DE 2-19 2.12 T arg et L ock Three types of target lock modes are available. Ma nual rev ers e: The transducer train dir ection is reserved m anually . This is the def ault target lock function set ting and it may be used i n both horizontal and vertical scan modes. Position: Tracks stationary position (such as a reef) using posit[...]

2. HORI ZO NT AL MO DE 2-20 2.12.3 Position mode This mode t racks a stationary position (such as a reef ) using position da ta f ed from a navigator . Note 1: If the [T ARGET] key is operated when usin g t he horizontal/vertical sca n combination m ode, the train ang le is autom atically pointed to ward target direction while the target lock m ark[...]

2. HORI ZONT AL MO DE 2-21 2.12.4 Echo mode The echo mode t racks a fish school, eit her automatically or m anually . The def ault setting is automat ic, and you can choose autom atic or manual w ith “LOCK MO DE” in the HORZ menu. Automatic echo tracking mod e The autom atic echo target lock f unction automatically tracks a f ish school appeari[...]

2. HORI ZONT AL MO DE 2-22 W hen the fish echo is lost the tilt angle is aut omatically chan ged as below to continu e tracking the echo: Tilt changed to search [(A + 10 ° ) → (A - 10 ° ) → A] Detection area displayed once again and target lock indicator lights. A : Tilt angle at start of target lock 5. T o turn off the target lock, press t h[...]

2. HORI ZONT AL MO DE 2-23 2.13 Horizont al Menu Overvie w This section presents an overvie w of the item s on the HORZ menu. 1. Press the [MENU] key to open the m enu. 2. Press ▲ to choose MENU and then press ◄ or ► to choose the HORZ menu. TVG LEVEL 4. 0 TVG DISTANCE 4. 0 GAIN ADJUST 0 RES. COLOR LO G CLUTTER 0 TARGET KEY REVERSE : SELECT :[...]

2. HORI ZONT AL MO DE 2-24 CLUT T ER: Low intensit y echoes, often caused by sedim ents in water , are painted on the screen as a large num ber or random dots. This noise can be suppressed. The higher the number (sett ing) the weaker the echoes which are erased. T ARGET KEY : Choose s target lock function am ong reverse, position and echo. For furt[...]

2. HORI ZONT AL MO DE 2-25 2.14 Interpreting the Ho rizont al D isplay This section provides inf ormation necessary f or interpreting the horizon tal display . 2.14.1 How the horiz ont al mode picture is p a inted As shown below , the se arch beam is em itted from the soundom e at a certain tilt angle. The inf ormation (target echoes) obtained b y [...]

2. HORI ZONT AL MO DE 2-26 2.14.2 Sample echo display s Bottom echoes W hen the tilt angle is changed, t he bottom echo illustrated bel ow will appear on the disp lay . W hen the tilt is decreased (toward 0 ° ), the bott om trace becomes wider and weaker . By observing the b ottom condition on the display , you can prevent dam age to t he net. (A)[...]

2. HORI ZONT AL MO DE 2-27 Fish schools A fish school appears a s a mass of echoes on the screen. The color of the mass shows the density of fish schools on the sonar beam . T o f ind distribution and cent er point of a fish school, try several diff erent tilt angles. (A) Sea surface fish Tilt angle: 0 to 10 (B) Midwater, bottom fish Tilt angle: 30[...]

2. HORI ZONT AL MO DE 2-28 Sea surface refl ections T o reduce sea surf ace reflections, set the tilt angle to 5 ° or lo wer , so the upper edge of the sonar beam does not hit the sea surf ace, or adjust TVG . W hen a decreased tilt angle is used, sea surf ace reflections cover a large area as illustrated belo w . Sea surface Sea surface 8 Tilt an[...]

2. HORI ZONT AL MO DE 2-29 Sidelobe echo (false echo) An ultrasonic wave is e mitted in t he direction set by the [T IL T] control (main beam) , however there are some em issions outside the m ain beam. These are called sidelobes. The energy of the sidelobe is f airly weak but when the water is com paratively shallow and the bottom is rocky and har[...]

2. HO RIZO NT AL MODE 2-3 0 2.14.3 Combi n ati on di s pla y exam ple s Hor izontal/hist ory display Press t he key t o dis pl ay t he hori zont al/hi story displ ay . Cursor Own ship marker Horizontal Displa y (main window) Histor y Displa y (sub window) Bottom echo Fish echo 30 25 R 40 m T 40 ° Range Tilt angle Tilt angle indicator CSE 357 ° SP[...]

2. HORI ZONT AL MO DE 2-31 Horizont al/video plott er displa y Press the key to display the hori zontal/ video plotter displa y . Cursor Own ship marker Horizontal Displa y (main window) Video Plotter Displa y (sub window) 500 T rack* → 15 B 195 Event mark er Event mark er data T rack* Event mark er (Entered from horizontal mode) Sonar range mark[...]

2. HO RIZO NT AL MODE 2-3 2 Hori zon t al /strat a di spl ay Press t he key t o dis pl ay t he hori zont al/s t rat a di spl ay . CSE 357 ° SPD 9.9 kt 34 ° 12. 343' N 134 ° 34. 213' W 30 25 R 40 m T 40 ° → 12 ↓ 10 B133 ° + PORT STBD Cursor position data Range Tilt angle Tilt angle indicator Cursor T arget lock indicator Interfere[...]

2. HORI ZONT AL MO DE 2-33 ◆ Color bar f or the strata display The depth of the bottom each in all dir ections is displayed in t he sub window , in the colors set by the color bar for the st rata display . The color bar for the strata display shows search angle range belo w 336 degrees. Color bar f or strata displa y 0 ˚ 6 ˚ 12 ˚ 90 ˚ -6 ˚ -[...]

2. HORI ZO NT AL MO DE 2-34 ◆ Proj ection in f ore direct ion and strata displa y Color "b" on the color bar is displa yed here . Color "a" on the color bar Color "b" Color "a" POR T STBD +90 ˚ -90 ˚ Projection in fore directi on and st rata display ◆ Dept h gradu ally becom ing shallower in f ore direc[...]

3-1 3. VERTICA L SCA N M ODE 3.1 Oper ational Over view T he fi gure below show s t he t y pi c al verti cal scan m ode oper at i ng s equenc e. 2. Lower the tr ansducer . 9. Adjust gain. 7(a). Set scanning sector . 6. Set center bearing of train sector . 5. Set range. 8. Set tilt angle. 3. Adjust screen brilliance. 7(b). Select training sector 180[...]

3. VERTICAL SCAN MOD E 3-2 3.2 Display ing V ert ical Scan Mode Display 3.2.1 T y pical vertical scan mode display Press t he key t o show the verti cal scan mode di spl ay . + → 6 ↓ 145 R → 60 m ↓ 100 m 340 Cursor position data Horizontal range V er tical range Event mark er Interf erence rejector ON Heading* 60 60 Horizontal range scale B[...]

3. VER TIC AL SC AN MO DE 3-3 3.2.2 H o w the v ertical s can pict u r e is p a inted The sounding beam is emitt ed and the inf ormation (target echoes) obtained by the reflect ed echo appears in the corresponding sec tor as it appears on t he horizontal m ode. The difference is that the training is perform ed only in vertical dir ection. I t forms[...]

3. VERTICAL SCAN M ODE 3-4 3.2. 3 H orizo nt al/ ver tic al scan di spl a y Press t he key t o dis pl ay t he hori zont al/vert i cal scan dis pl ay . CSE 357 SPD 9.9 KT R 40 m T 40 AFT FORE 100 Cursor position data V er tical scan bearing cursor Cursor Course*, speed* Own ship marker Horizontal Displa y (main window) V er tical Scan Display (sub w[...]

3. VER TIC AL SC AN MO DE 3-5 The displays are indepe ndent of each other so you can adjust them as desired. Press the [MAIN/SUB] key to choose the window to adjust. Each press of the key momentarily displays MAIN W INDOW C ONTROLLABLE or SUB W INDO W CONTROLLABLE at the top of the screen t o let you know which window may be adjusted. A red rectang[...]

3. VE R TICAL SCAN MODE 3-6 3.3 Choosing the Range The [RANGE ] control chooses the detection (d isplay) range, in 15 set tings. Choose t he range according to eith er the fish species bein g searched or the depth desired. Each t ime the control is operated t he newly chosen rang e briefly appears in large characters at the screen top. Range is pe [...]

3. VER TIC AL SC AN MO DE 3-7 3.5 Choosing Dis play Sector Sector means t he wid th of t he transducer training, from 6 ° to 180 °. 24 Sector (Shown: 24 ) Sector The [SECTOR] control chooses the t raining area am ong the sixteen posit ions shown in the table below . Clock wise rotation of t he control increases the sector width; counterclockwise [...]

3. VE R TICAL SCAN MODE 3-8 3.6 Choosing Se ctor Center The center direction of the sounding be am in the vertical direct ion can be changed with the [TI L T] control. The setting range is 0 ° to 18 0 ° in increm ents o f 6 ° . Choose the sett ing which places the sect or center in the m iddle of the detection ran ge. Sector range 180 0 In the e[...]

3. VER TIC AL SC AN MO DE 3-9 3.7 Choosing the T ilt Spe ed The [F AST SCAN] key chooses the tilt speed; that is, t he stepping angle at which the transducer scans. T wo choices are availab le, 3 ° (norm al speed) and 6 ° (high speed). Each time the key is pressed the displa y momentarily shows “NORM” (norm al speed) or “F AST” (high spee[...]

3. VE R TICAL SCAN MODE 3-10 3.9 Ev ent Mar ker 3.9.1 Entering an event marker The event m arker functions to m ark important locations on the screen, and five m ay be inscribed. Each tim e the [EVENT] key is pressed the “latest event marker” ( ⊕ ) is inscribed at the cursor location an d all previously entered event markers are sho wn by the[...]

3. VER TIC AL SC AN MO DE 3-1 1 3.9.2 Deleting all event markers All event markers can be erased f rom the screen as follows: 1. Operate t he Omnipad to place the cursor outside the displa y area. 2. Press the [EVENT] key to show the following dialog bo x. Do the next step within four seconds; other wise the dialog bo x will be erased. DELETE EVENT[...]

3. VE R TICAL SCAN MODE 3-12 3.1 1 Adjusting the Picture 3.1 1.1 Displa y i ng weak echoes clearly Echoes from targets (such as the bottom or a f ish) return to the transducer in order of the distance to them, and when their intensit ies are compared at the transducer f ace, those from nearer targets are generally stronger when their reflect ing pr[...]

3. VER TIC AL SC AN MO DE 3-13 4. Press ◄ or ► to adjust TVG distance, considering sea condit ions. The larger the f igure the greater the distance at which the TVG works. TVG Distance Setting 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 . . . . 10.0 Meters 3 8 20 40 60 100 130 160 200 250 320 . . . . 1000 Feet 10 30 70 130 210 330 410 520 660 820[...]

3. VE R TICAL SCAN MODE 3-14 3.1 1.2 Suppressi ng noise and interference Y o u may encounter occ asional or interm ittent noise and interf erence as sho wn below . This is mostly caused by ele ctrical equipm ent, engine, propeller noise f rom own ship, or noise from other sonars being operated nearby . If interference appears, t urn on the interf e[...]

3. VER TIC AL SC AN MO DE 3-15 3.1 1.4 Resolution color RES. COLOR sets transfer characteristics of input signal level versus displa y echo level. Echo strength is em phasized in order of CUBE, SQUARE, LINEAR, LOG . Y ou can se e the characteristics of each by watching the color bar as you change the se tting. 1. Press the [MENU] key to open the m [...]

3. VE R TICAL SCAN MODE 3-16 3.1 1.6 Choosi ng horiz ont al range exp ansion factor Y o u may choose the ho rizontal range expansion f actor for the vertical scan picture, f rom x1 or x2. Note that t his feature cannot be adjust ed when the vertical search mode, activated by a f unction key , is turned on. 1. Press the [MENU] key to open the m enu.[...]

3. VER TIC AL SC AN MO DE 3-17 3.12 Interpreting the V ertical Scan Display This section provides inf ormation necessary f or interpreting the vertical scan displa y . 3.12.1 Sample echo display s Port-st arboard pictur e Y o u can see fish echoes at the center-right of the screen. The bottom is displayed wider as the distance from t he ship’ s p[...]

3. VE R TICAL SCAN MODE 3-18 Display of net ha uli ng This is an exam ple of net hauling display . The location of the net is indicated clearl y . FORE AFT Net Net hauling and son ar picture False ech o In shallow water (depth less than 100 m) detection, unwanted ec hoes as shown in the figure belo w m ay appear . This phenomenon is caused b y the [...]

4-1 4. ECHO SOUNDER M ODE 4.1 Oper ational Over view T he fi gure below show s t he t y pi c al echo s ounder m ode oper at i ng s equenc e. 2. Lower the tr ansducer . 6. Adjust gain. 5. Set range . 8. Set tilt angle. 3. Adjust screen brilliance. 9. Set picture advance speed. 4. Select echo sounder mode. 10. Measure range to fish school with cursor[...]

4. E CHO S OUNDE R MO DE 4-2 4.2 T y pical Echo Sounder Dis pl ay Press t he key t o displ ay t he ec ho s oun der pi ct ure. + 4 R 10 m T 60 ° 340 ° DEP TMP 6.5 m 12. 3˚C Cursor position Range Tilt angle Fish echo Bottom echo Event marker Cursor Interference rejector ON 10 5 Depth (When the tilt angle is 90 deg., the depth measured by this sona[...]

4. ECHO SOU NDER M ODE 4-3 4.3 Choosing the Range The [RANGE ] control chooses the detection (d isplay) range, in 15 set tings. Choose t he range according to eith er the fish species bein g searched or the depth desired. Each t ime the control is operated t he newly chosen rang e briefly appears in large characters at the screen top. Range is pe r[...]

4. ECHO SOU NDER M ODE 4-4 4.4 T rain Direction The sounding beam may be directed 360 ° in any direction. Operate the [ TRAIN] control t o choose sounding beam direction. Each sett ing on the control is an incre ment of 6 ° . The train indicator at t he top of the screen sho w s training direct ion: 0 ° , f ore direction; 90 ° , starboard direc[...]

4. ECHO SOU NDER M ODE 4-5 4.7 Measuring Range b y Cursor Use the cursor to displa y the range from o w n ship t o the cursor location. Use the Omnipad to place the cursor wher e desired. The range to the cursor appears at the upper lef t-hand corner of the screen. NA V D ATA or A-SCOPE DISPLA Y Range to cursor Cursor : Range ↓ How to measure ran[...]

4. ECHO SOU NDER M ODE 4-6 4.8.1 Inscribing the event marker 1. Operate t he Omnipad to place the cursor on th e location desired f or an event m arker . 2. Press the [EVENT ] key to inscribe the event marker . NA V D ATA or A-SCOPE DISPLA Y "Pre vious e vent mark er" "Latest e vent mark er" Displa y area T o delete all ev ent m[...]

4. ECHO SOU NDER M ODE 4-7 4.9 Range Marker The range marker f unctions to measure t he range to a target echo (fish school, bott om, etc.) 1. Operate the Om nipad to place the cursor on the location des ired. 2. Press the [R/B] key to display the rang e marker . The range marker appears along with range indicatio n. 3. T o erase the range m arker [...]

4. ECHO SOU NDER M ODE 4-8 4.10 Adjusting the Picture 4.10.1 Display ing w eak echoes clea rly Echoes from targets (such as the bottom or a f ish) return to the transducer in order of the distance to them, and when their intensit ies are compared at the transducer f ace, those from nearer targets are generally stronger when their ref lecting proper[...]

4. ECHO SOU NDER M ODE 4-9 3. Press ▲ or ▼ to choose TVG DIST ANCE and then press ► . The following dialog b ox appears. 4.0 200 m TVG DISTANCE Hi Lo GAIN 4. Press ◄ or ► to adjust TVG distance. TVG Distance Setting 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 . . . . 10.0 Meters 3 8 20 40 60 100 130 160 200 250 320 . . . . 1000 Feet 10 30 7[...]

4. ECHO SOU NDER M ODE 4-10 4.10.2 Findi ng echo strength (A -scope displa y ) The A-scope displa y shows echoes at each tra nsmission w ith am plitudes and tone proportional t o their intensit ies, on the right 1/ 4 of the screen. I t is useful for estim ating the kind of f ish school and bottom composition. 1. Press the [MENU] key . 2. Press ▲ [...]

4. ECHO SOU NDER M ODE 4-1 1 4.10.3 Gain adjustment Adjust t he gain here when there is disparity in gain le vel between the m ain and sub windo w s. 1. Press the [MENU] key to open the m enu. 2. Press ▲ to choose MENU at the top of t he screen. 3. Press ◄ or ► to choose the ES menu. 4. Press ▲ or ▼ to choose GAI N ADJUST . 5. Press ► t[...]

4. ECHO SOU NDER M ODE 4-12 4.10.5 Suppressing clutter Low intensity echo es, often caused by sediments in water , are painted on t he screen as a large num ber or random dots. This noise can be suppressed. 1. Press the [MENU] key to open the m enu. 2. Press ▲ to choose MENU at the top of t he screen. 3. Press ◄ or ► to choose the ES menu. 4.[...]

5-1 5. MENU OPERA TION 5.1 COM1 Menu 5.1.1 Displaying the COM1 menu 1. Press the [MENU] key to open the m enu. 2. Press ▲ to choose MENU, and then press ◄ to choose CO M1. TX POWER MA X PULSELENGTH LON G TX RATE 10 INT REJECT OFF AGC OF F : SELECT : CHANGE ME N U : E ND MENU COM1 HORZ VERT ES PRESET S Y S COM2 AUDIO LEVEL 0 COM1 menu 5.1.2 COM1[...]

5. MENU OPERA TION 5-2 5.2 COM2 Menu 5.2.1 Displaying the COM2 menu 1. Press the [MENU] key to open the m enu. 2. Press ▲ to choose MENU, and t hen press ◄ or ► to choose COM2. DELETING TRACK NO WHITE MARKER OFF SIG LEVEL OF F COLOR 16 BKGD COLOR 2 : SELECT : CHANGE ME N U : E ND MENU COM1 HORZ VERT ES PRESET S Y S COM2 COM2 menu 5.2.2 COM2 m[...]

5. MENU OPERA TION 5-3 5.3 Short-cut Menu , Preset Menu These m enus program the CUSTOM M ODE keys [ 1], [2] and [ 3]. The menu to use may be chosen with CUSTOM KEY on the SYSTEM SETTING 1 menu. Short-cut ke y: One-touc h activation of the operator-selected dia log box. Preset key: One-touch setup of m ode, sector , train, range, tilt and scan spee[...]

5. MENU OPERA TION 5-4 RANGE-SONAR MODE RANGE-VERTICAL MODE RANGE-E/S MODE ADJ MOTION SENSOR TX FREQ ADJUST TEST TEST PATTERN DEMO MODE DEFAULT : SELECT : MENU DISPLAY MENU: END SYSTEM SETTING : COLOR PALETTE LANGUAGE SYSTEM BACKUP LOAD BACKUP DATA HEADING OFFSET, DRAFT OFFSET ** SYSTEM MENU ** RANGE-TRACK MODE System menu 5. SY STEM SETTING is hig[...]

5. MENU OPERA TION 5-5 5.3.2 Changing setting of preset key 1. Choose PRESET KEY following the proce dure in paragraph 5.3.1. 2. Press the [MENU] key to open the m enu. 3. Press ▲ to choose MENU, and then press ◄ or ► to choose PRESET . MODE SECTOR TRAIN RANGE TILT SPEED PRESENT 1 FUNCTION KEY: ENTRY MENU: END ADJUST THE KNOBS AND FUNCTION KE[...]

5. MENU OPERA TION 5-6 5.3.3 Changi ng setting of short-cut key The def ault settings are key [1], vertical search; key [2], volum e, and key [3], delet e track. The operator m ay change their f unctions as desired. Note: I n the combination m odes the short-cut key may only be activat ed from the m ain window . 1. Choose SHORT -CUT following the p[...]

5. MENU OPERA TION 5-7 Activating a short-cut key 1. Press a CUST OM MODE key , and t he dialog box progr ammed for t he custom key pressed appears. (No di alog box appears f or VER. SEARCH.) The dialog box below is for “CLUTTER”. CLUTTER (HORZ): 0 1 2 3 Note: V ertical search can only be activated when t he horizontal m ode or a combination m [...]

5. MENU OPERA TION 5-8 5.4 SYSTEM Menu This menu provides ite ms which may be set according t o operator ’ s preference. 5.4.1 Displaying the SYSTEM menu 1. Press the [MENU] key to open the menu. 2. Press ▲ to choose MENU, and then press ► to choose SYS. 3. Press ▼ to choose GO T O SYS MENU. 4. Press ◄ to choose Y ES. Adjusted at installa[...]

5. MENU OPE RA TION 5-9 5.4.2 SYSTEM SETTING 1 menu description 1. Display the S YSTEM menu and then press ▲ or ▼ t o choose SYSTEM SETTING . 2. Press ► to open the SYSTEM SETTI NG menu. 3. Press ▲ to ME NU. 4. Press ◄ to choose “1.” OFF 10sec 30sec 1min 3min 6min TARGET L/L : OFF ON CUSTOM KEY : PRESET KEY SHORT-CUT KEY OFF NORMAL RE[...]

5. MENU OPERA TION 5-10 HEAD ING IND ICA TION : Chooses heading indi cation f ormat, tr ue (figures) or azimut h (compass points, for example, N, S, et c.), for the echo sounder and vertical scan m odes. Requires head ing data. NORT H MA RK: T urns t he north marker on or off. Requires heading data. CSE DA T A: Chooses heading data source, navigato[...]

5. MENU O PE RA T IO N 5-1 1 5.4. 3 S YSTE M S ET TIN G 2 m e nu descr i pt ion OFF 15 kt 20kt OFF (OFF, 5-15kt) AUTO RETRACTION : SPEED ALARM/MESSAGE : DEFAULT SETTING : NO YES : SELECT : CHANGE MENU: END MENU 1 2 ** SYSTEM SETTING 2 ** MAXIMUM ALLOWABLE SPEED IS 15 KNOTS WHILE SOUNDDOME IS BEING RETRACTED. IF VESSEL HAS RAPID ACCELERATION CAPABIL[...]

5. ME NU OP ERA TI ON 5-1 2 SPEED A LARM M ESSA GE: Choos e t he spe ed at w hi c h the speed al arm m es s age is dis pl ay ed and t he aur al al arm r el ease d w hen the speed goes hi gh er t han t hat s et her e. T he audi o al arm can be si l enced w i th t he [R/ B] key . [ ª ] pressed to low er tran sdu cer S peed ab ov e 15 kts Mes sag e 1[...]

5. MENU OPERA TION 5-13 5.4.4 Sonar (horizontal) mode range settings The user may preset horizo ntal mode ranges as desired. 1. Choose RANGE-SONAR MODE at t he SYS menu and t hen press ► . 2: 2 0 3: 4 0 4: 6 0 10 : 250 11 : 300 12 : 400 13 : 500 14 : 600 15 : 800 DEFAULT SETTING : NO YES : SELECT : CHANGE MENU: END 1: 10 (10-1600m) 5: 8 0 6 : 100[...]

5. MENU OPERA TION 5-14 5.4.5 V ertical scan mod e range sett ings As with the horizontal mode, t he user may preset the vertical scan m ode’s ranges. 1. Choose RANGE-VER MODE at the SYS m enu and then press ► . 2: 2 0 3: 3 0 4: 4 0 10 : 200 11 : 250 12 : 300 13 : 400 14 : 500 15 : 600 : SELECT : CHANGE MENU: END 1: 10 (10-600m) 5: 6 0 6: 8 0 7[...]

5. MENU OPERA TION 5-15 5.4.6 Echo sounder mode range settings As with the horizontal and vertical scan m odes, the user m ay preset the echo sounder mode’s ranges. 1. Choose RANGE-E/S MODE at the SYS menu and then press ► . 2: 2 0 3: 3 0 4: 4 0 10 : 200 11 : 250 12 : 300 13 : 400 14 : 500 15 : 600 : SELECT : CHANGE MENU: END 1: 10 (10-600m) 5:[...]

5. MENU OPERA TION 5-16 5.4.7 T rack range settings Y o u may choose the video plot ter display scale range as f ollows. 1. Choose RANGE-TRACK at t he SYS m enu and then press ► . 5 : 8000 2 : 1000 3 : 2000 4 : 4000 : SELECT : CHANGE MENU: END ** RANGE-TRACK MODE ** 1: 500 (100-10000m) DEFAULT SETTING : NO YES Range-track mode menu 2. Press ▲ o[...]

5. MENU OPERA TION 5-17 5.4.8 Color p alette The color palette lets the user change the color of echoes, background, text and m enu as desired. R :0 ** COLOR PALETTE ** TEXT BKGD MENU BKGD3 TEXT BKGD MENU BKGD1 TEXT BKGD MENU DEFAULT SET : NO YES (ECHO & BKGD COLORS WILL BE CHANGED) G: 2 B: 9 ECHO 2 1 3 4567 89 1 0 1 1 1 2 1 3 1 4 1 5 : SELECT [...]

5. MENU OPERA TION 5-18 5.4.9 Language Menu language can be chosen from among the languages shown in the Language menu. JAPANESE ENGLISH FRANCAIS ESPANOL ITALIANO PORTUGUES DANSK NORSK SVENSK THAI CHINESE VIETNAM : CHANGE MENU: END ** LANGUAGE ** LANGUAGE: Language menu 5.4.10 System bac kup System settings can be saved to the inte rnal memory with[...]

5. MENU OPERA TION 5-19 5.4.12 T r ansducer frequency adjustment If t he CH-270 is receiving interf erence from a video sounder or ot her sonar on board your ship, adjust the frequency of t he CH-270’ s transducer to reduce t he interf erence. 180.0 kHz (171-189 kHz) FREQ SHIFT : : CHANGE MENU: END ** TX FREQ ADJUST ** TX frequency adjust ment me[...]

5. MENU OPERA TION 5-20 5.4.14 Restoring all default settings All default menu settings m ay be restored. Choose YES and then press the [ MENU] key to restore all def ault settings. Note t hat the settings stored in SYSTEM BACKUP are not disturbed. NO YES ARE YOU SURE? : : CHANGE MENU: END ** DEFAULT ** NOTE: RESET ALL THE SETTINGS INCLUDED IN SYST[...]

6-1 6. MAINTENANCE, TROUBLESHOOTING This chapter provides th e inform ation necessary for keeping the equi pment in good working order . WARNING Do not open the equipment. Hazardous voltage which can cause electrical shock exists inside the equipment. Only qualified personnel should work inside the equipment. 6.1 Pre v enti v e Ma intenance Check t[...]

6. MAIN TENANCE, TROUBLESH OOTING 6-2 6.3 Hull Unit Maintenance 6.3.1 Lubricati on Coat the raise/lo wer screw shaft once a year with Molytone gr ease. Also, grease t he raise/lower m ain shaft (upper p art of the grease cotton retainer) twice a year . 6.3.2 Manuall y rai sing, low ering transducer WARNING Turn off the power at the ship's main[...]

6. MAIN TENANCE , TROUBLESH OOTING 6-3 Hull unit CH- 184 1. T urn off the breaker s witch on the hull unit. 2. Slightly loosen the bolts f astening the shaft retainer . 3. Raise and lower the shaft by hand to conf irm that it raises and lowers sm oothly . If it does not rise or lower sm oothly , do not use force; t he shaft m ay bend. 4. T ighten b[...]

6. MAIN TENANCE, TROUBLESH OOTING 6-4 6.6 T roubles hooting The table below provide s common sym ptoms of equipm ent troubles and the m eans to rectify the m. Symptom Check, Remedy Cannot turn on the power . • Check ship’s mains . • Have a suitably qualified technician check the fuse in the transceiver unit. Bottom echo becomes irre gular . ?[...]

6. MAIN TENANCE , TROUBLESH OOTING 6-5 6.7 Error Mes sages The table below sho w s the error m essages which may appear on the d isplay . All error messages are accom pa nied by the audio alarm , which you m ay silence with the [R/B] key . Message Meaning, Remedy Raise/Lo wer Error RAISE/LOW ER FUNCTION HAS NOT BEEN COMPLETED. MAXIMUM ALLOWABLE SPE[...]

6. MAIN TENANCE, TROUBLESH OOTING 6-6 6.8 Diagnos tics 1. Press the [MENU] key to open the m enu. 2. Press ▲ to choose MENU, and t hen press ► to choose SYS. 3. Press ▼ to choose GO TO SY S MENU. 4. Press ◄ to choose YES. 5. Choose TEST and then press ► to start the t est. The la mps above the XDR switches light alternate ly every second [...]

6. MAIN TENANCE , TROUBLESH OOTING 6-7 Interpreti ng the test results display MAIN PROGRAM NO., P A NEL PROGRA M NO.: The program numbers of the MAIN and P ANEL pro grams appear at the t op of the display . ROM, R AM, VR AM, NME A: Checked f or proper operation a nd the results displa yed as OK or NG (No Good). For NG contact a FURUNO agent or deal[...]

6. MAIN TENANCE, TROUBLESH OOTING 6-8 6.9 T est Pattern A test pattern can be displayed to check f or proper display of colors. 1. Press the [MENU] key to open the menu. 2. Press ▲ to choose MENU, and then press ► to choose SYS. 3. Press ▼ to choose GO T O SYS MENU. 4. Press ► to choose Y ES. 5. Choose TEST P A TTERN and then press ► to d[...]

M-1 MENU TREE [MENU] ke y TX PO WER ( MAX , MIN) PULSELENGTH ( LONG , SHOR T) TX RA TE (EXTERNAL, 1-10; 10 ) INT REJECT ( OFF , ON) A GC ( OFF , ON) A UDIO LEVEL ( 0 -10) COM2 menu TV G LEVEL (0-10, 4.0 ) TV G DIST ANCE (0-10, 4.0 ) GAIN ADJUST (-10 - +10, 0 ) RES. COLOR ( LOG , LINEAR, SQU ARE, CUBE) CLUTTER ( 0 , 1, 2, 3) T ARGET KEY ( REVERSE , [...]

MENU TREE M-2 SYSTEM SETTING RANGE-SONAR MODE (all def ault ranges) (min. range: m, 10; ft, 40; fa, P/B, Hiro , 10; max. range: m, 800; ft, 2500; f a, 500; P/B, Hiro , 600) RANGE-VER MODE (all def ault ranges) m: 10, 20, 30, 40, 60, 80, 100, 120, 160, 200, 250, 300, 400, 500, 600 ft: 30, 60, 90, 120, 150, 200, 250, 300, 400, 500, 600, 800, 1000, 15[...]

SP-1 SPECIFICA TIONS 1. GENERA L 1.1 Display S ystem 10.4-inch color LCD (64 0 x 480 dots), or locally suppli ed monitor 1.2 T ransmit Frequenc y 180 kHz 1.3 Out put Power 0.8 kW , power reduction available 1.4 Range (f actory settings) Ran ge (m) 1 2 3 4 5 6 7 8 9 10 1 1 12 13 14 15 Horizontal Mode 10 20 40 60 80 100 120 160 200 250 300 400 500 60[...]

SPECIF ICA TIONS SP-2 3.5 Horizontal Mode Contro l Scanning Angle: 6 ° to 360 ° , 2 4 ° step Scanning Center: 6 ° step s, 360 ° setting available Scanning S tep Angle: Norm al: 6 ° , High speed: 12 ° Elevation Angle: +5 ° to 90 ° , 1 ° step T ime to T rain F ull Circle: Range (m) 10 20 40 60 80 100 120 160 200 250 300 400 500 600 800 Norm[...]

IN-1 INDEX A AGC ............................................................. 5 -1 A-scope display .........................................4 -10 Auto re traction ........................................... 5-1 1 Auto ti lt .......................................................2-24 B Backup data ...............................................5- 1[...]

IND EX IN-2 Menu tr ee ................................................. AP- 1 N North m ark ................................................. 5-10 P Panel dim m er .............................................. 1- 7 Pic ture adv anc e sp eed (echo s ounder m ode)............................... 4-4 Posi tion da ta form at...........................[...]