Koden CVS-841 Operation Manual
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Koden CVS-841 Operation Manual

Koden CVS-841 Operation Manual

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  • Page 2 No part of this publication may be reproduced, transmitted, translated in any form by any means without the written permission of Koden Electronics Co., Ltd. The technical descriptions contained in this publication are subject to change without notice. Koden assumes no responsibility for any errors, incidentals or consequential damages caused by misinterpretation of the descriptions contained in this publication.
  • Page 3 Display Front Plate A glass plate is used in front of the Liquid Crystal Display in the CVS-841 sounder unit. The glass is vulnerable against mechanical impact. Use the utmost care when handling this unit, not to apply mechanical shock to this part.
  • Page 4 Preface CVS-841/851 Symbols used in this manual The following symbols are used in this manual. You are requested to be fully aware of the meaning of each symbol before carrying out inspection and maintenance of this equipment. Alarm mark To handle the equipment ignoring this sign may lead to injury to the human body or damage to the equipment.
  • Page 5 Preface How to use this manual Scope of this manual This manual contains information about installation, operation and maintenance of the CVS-841/851 series of sounder. Structure of this manual This manual is divided into sections according to the contents as described below. This arrangement will help you overview the whole of the contents as well as refer to detailed information for your specific requirement.
  • Page 6 Preface CVS-841/851 Internal connections of the system Check up after installation Connector’s pinouts Transducer installation Chapter 5 : Basic Operation Operating controls and functions Getting started Displaying the dual images Operating the VRM Selecting the image speed Activating the IR function...
  • Page 7 CVS-841/851 Preface Chapter 8: Trouble Shooting Information required for service Self check function Trouble shooting Setting the video threshold Chapter 9: Maintenance Periodical inspection and cleaning Chapter 10: Technical References Serial input data Details of input sentences Serial output data...
  • Page 8 CVS-841/851 Terminology Operation Manual Terminology Alarming range A user defined alarming range bar, which is displayed in the right side of the display. When a school of fish or the seabed touches or enters this zone, an audio alarm will be activated.
  • Page 9 Terminology CVS-841/851 Operation Manual Distance Traveled A logged distance the ship has made. This feature is available only when the speed sensor device is installed. Draft Line A sub menu function that adjusts the transducer depth in order to obtain the correct sounding depth in shallow waters.
  • Page 10 CVS-841/851 Terminology Operation Manual Image Speed The rate of the image feed, which is related to the frequency of the transmission, for instance, 2/1 means the image shifts twice every transmission. Inner Hull Installation A method of transducer installation; transducer is installed inside the bottom of the hull using the optional inner hull kit MFB-04.
  • Page 11 Terminology CVS-841/851 Operation Manual Simulator A simulated sonar video image shown on the screen, which is useful to get the hang of the sounder operation before using it in the field. Sonic Correction The correction method of a deviated depth display caused by the change of water temperature or salinity.
  • Page 12 CVS-841/851 Terminology Operation Manual Zoom Range The name of a sub menu, which allows selecting the zooming range of the following image modes; Bottom Lock, Bottom Discrimination and Bottom Zoom. 93132682-00...
  • Page 13 CVS-841/851 Main Contents Operation Manual Main Contents Chapter 1 General Information Chapter 2 Equipment Composition Chapter 3 Specifications Chapter 4 Installation Chapter 5 Basic Operation Chapter 6 Using the Menu Chapter 7 Functional Registration Chapter 8 Trouble Shooting Chapter 9...
  • Page 14 CVS-841/851 Chapter 1 Operation Manual General Information Chapter 1 General Information Contents Page No. General features of the equipment......1-1 Applicable standard..........1-1 Equipment configuration......... 1-1 Software type name ..........1-2 93132682-00 Contents...
  • Page 15 The CVS-841/851 series of sounder is designed and tested to comply with the international standard of IEC-60945 3 edition that defines general requirements of electronic maritime equipment. 1.3 Equipment configuration The CVS-841/851 system composition is shown in Table 1.1 (Refer to Figure 1.1 for the system configuration diagram) 93132682-01...
  • Page 16 Chapter 1 CVS-841/851 General Information Operation Manual Table 1.1 Type names of component units Model name Output Transducer TD-282 28kHz CVS-841C TD-401D 38kHz(or 40 kHz) CVS-851C TD-501B 50kHz TD-751 75kHz TD-2001D 200kHz TD-284 28kHz CVS-841P TD-404T 38kHz(or 40 kHz) CVS-851P...
  • Page 17 10.8 - 31.2 VDC ST-90-1 ST-100-1 Transducers NOTE 1: A section in a dotted block is an optional item. NOTE 2: The Junction Box JB-32 is available for long cable connections. Figure 1.1 System configuration of CVS-841/851 series sounder 93132682-01...
  • Page 18 CVS-841/851 Chapter2 Equipment Composition Chapter 2 Equipment Composition Contents Page No. Standard equipment list............2-1 Spare parts list ................ 2-1 Optional items list ..............2-1 Available transducers list ............2-2 93132682-00 Contents...
  • Page 19 CVS-841/851 Chapter 2 Equipment Composition Chapter 2 Equipment Composition 2.1 Standard equipment list Weight/Length Item name Type name Remarks Q’ty Display CVS-841C/P With base mount 6.8 kg CVS-851C/P With base mount 10.5 kg DC cable CW-253-2M For Display Unit TD cable...
  • Page 20 Chapter 2 CVS-841/851 Equipment Composition Item name Type name Remarks Weight/Length (11) Connecting 6P waterproof connector (Conxall) CW-375-5M cable (For /6P waterproof connector (LTW) navigator unit) Fly leads CW-376-5M /6P waterproof connector (LTW) Connecting CW-60-10M BNC/Crimp terminal cable (For CW-154A-5M...
  • Page 21 CVS-841/851 Chapter 3 Specifications Chapter 3 Specifications Contents Page No. Functional specifications............3-1 Power supply requirements........... 3-2 Environmental conditions............3-3 External dimensions and weight........... 3-3 93132682-00 Contents...

  • Page 22: Functional Specifications

    Equipment type name CVS-841C(1kW), CVS-841P(3kW) CVS-851C(1kW), CVS-851P(3kW) Display CVS-841: 10.4 inch color TFT LCD (480 × 640 dots) CVS-851: 15 inch color TFT LCD (640 × 480 dots) Display color 16 colors (Color pallet can be changed)/background: 9 colors TX Frequency(kHz)

  • Page 23: Power Supply Requirements

    3 ways (Off, Auto function Depth range, shift Clock function Year, Month, Day, Hour, Minute, Second (NOTE: CVS-841 has no Year, Month, Day, a Day of the Week displays. Depth unit 5 kinds (m, hiro, fm, I.fm, ft) Bottom detection range...

  • Page 24: Environmental Conditions

    External dimensions: Width x Hight x Depth CVS-841: 320 (12 5/8) x 340 (13 3/8) x 138 (5 7/16) mm (inch), 6.8 kg (15 lbs) CVS-851: 390 (15 3/8) x 430 (16 15/16) x 173 (6 13/16) mm, 10.5 kg (23.0 lbs) Unit in mm (inch) Weight: 6.8 kg (15 lb)
  • Page 25 Chapter 3 CVS-841/851 Specification 390 (15 3/8) 200 (7 7/8) 173(6 13/16) (15/16) 40.5 (1 5/8) Unit in mm (inch) Weight: 10.5 kg (23.0 lb) Figure 3.2 External dimensions of CVS-851 Display Unit 93132682-01...

  • Page 26: Table Of Contents

    CVS-841/851 Chapter 4 Installation Chapter 4 Installation Contents Page No. Installation consideration ............ 4-1 Unpacking each component of the system ......4-1 Inspection of each component unit and accessories ..4-1 Siting the units ..............4-1 Cable routing and connections ........... 4-1 Display installation ...............

  • Page 27: Installation Consideration

    Chapter 4 Installation 4.1 Installation consideration General Qualified service technicians should perform the installation of CVS-841/851 series that comprises the following operations. (1) Unpacking each component of the system. (2) Inspection of the exterior of each component unit and accessory.

  • Page 28: Display Installation

    (1). Refer to the following figures for detail. [CVS-841] [CVS-841] Display unit Fixing screws (M5 screw, 6 pcs) Mounting bracket Washer Knurled fixing bolt Unit in mm (inch) Figure 4.1 Fitting detail of CVS-841 Figure 4.1 Fitting detail of CVS-841 93132682-03...
  • Page 29 CVS-841/851 Chapter 4 Installation Unit in mm (inch) Figure 4.2 Service space required for CVS-841 [CVS-851] Display Unit Fixing screws (M5 screw, 5 pcs) Mounting bracket Washer Knurled fixing bolt 5 25/32 2 9/16 5 25/32 Unit in mm (inch) 2 9/16 Figure 4.3 Fitting detail of CVS-851...

  • Page 30: Flush Mounting

    (5) Refit the coverings removed in step (3). Display Unit Fixing screws (M4 screws, 4 pcs) Screw covers (4 pcs) Figure 4.5 Fitting the Display Unit in flash mount mode (CVS-841) 93132682-03...
  • Page 31 16 (5/8) 274 (10 13/16) 306 (12 1/16) Unit in mm (i nch) Figure 4.6 Dimensions of opening and fixing holes for CVS-841 Fixing holes for M4 screw (4 pcs) 378 (14 7/8) 9 ( 3/8) 9 (3/8) 360 (14 3/16) Unit in mm (inch) Figure 4.7 Dimensions of opening and fixing holes for CVS-851...

  • Page 32: Internal Connections Of The System

    TD Extension cable AC Power Supply AC/DC VSV-2T11-3M (100/110/115VAC) Rectifier (200/220/230VAC) PS-006 TD Junction Box JB-32 Cable gland DC Power Supply (10.8 - 31.2VDＣ) NOTE: Dotted sections are optional items and wirings. TD (Transducer) Figure 4.8 Inter-connections of CVS-841/CVS-851 93132682-03...

  • Page 33: Preparation Of Dc Power Cable

    CVS-841/851 Chapter 4 Installation 4.7.1 Preparation of DC Power cable White To Display Unit Black DC - Gray Not used NOTE: Insulate the red and green wires using PVC tape. Green Not used 4.7.2 Preparation of TD cable (1) Cut off the cable sheath by 10 cm from end.

  • Page 34: Connection Of The Transducers

    Chapter 4 CVS-841/851 Installation 4.7.3 Connections of the transducers Depending on the transducer type, the connections are different. Refer to the connecting diagram below. Also note for the connections. If the Transducer Junction Box is used, connect each lead to a designated terminal, and if the junction box is not used, solder two leads with PVC tape wound appropriately for good isolation.

  • Page 35: Check Up After Installation

    Shield Shield 4.8 Check up after installation Before you turn the unit on, check the following points to make sure the CVS-841/851 operates properly. (1) Is the ship’s supply voltage and current within the rated range? (2) Is the transducer wiring normal? No wrong connections, no short circuits, etc? (4) Are the High and Low frequency transducers properly connected to their corresponding terminals? (5) Are the cables routed and connected properly according to Para.
  • Page 36 Chapter 4 CVS-841/851 Installation Appendix 1 Connectors’ pinouts Transducers NMEA In/Out Ground (GND) TD (TD1H:High Frequency) Serial Output (TX) TD (TD2L:Low Frequency) Serial Output (GND) SH (Shield) Serial Input + (RX+) TD (TD2H:High Frequency) Serial Input – (RX-) TD (TD1L:Low Frequency)

  • Page 37: Appendix 2 Transducer Installation

    CVS-841/851 Chapter 4 Installation Appendix 2 Transducer installation A2-1. Recommended transducer installation The transducer should be installed in a location free of bubbles and away from disturbed water flow. Smooth water flow around the transducer and along its surface is very important for consistent operation.
  • Page 38 Installation A2-2. Through-hull installation Transducer installation of CVS-841/851 is only possible with through-hull installation. Various types of rectifying tanks (Turbulence Minimizing Enclosure) are prepared according to the material of the ship’s hull or transducer frequency used. Mount the rectifying tank to the ship’s bottom before mounting the transducer to in the rectifying tank.
  • Page 39 CVS-841/851 Chapter 5 Basic Operation Chapter 5 Basic Operation Contents Page No. Operating controls and functions........5-1 5.1.1 Operating controls and key switches ........5-1 5.1.2 Image display ................5-3 Getting started..............5-3 5.2.1 Turning on ................5-3 5.2.2 Selecting NORMAL image mode ..........5-4 5.2.3 Selecting the depth range .............5-4...
  • Page 40 Chapter 5 CVS-841/851 Basic Operation Activating the IR function ..........5-16 Page No. Operating the SHIFT key...........5-17 5.7.1 Setting Fix Shift mode ............5-17 5.7.2 Setting the Auto Shift function ..........5-18 Using the Color Rejection function .........5-18 Setting the Alarm Function..........5-20 5.9.1...

  • Page 41: Operating Controls And Functions

    Frequency STC in depth. H FREQ STC AMPD control Varies the intensity of High Frequency STC. POWER/BRIGHTNESS control with a switch Turns on or off the unit and adjusts the brightness of the image. Figure 5.1 CVS-841: Details of operating key switches 93132682-00...
  • Page 42 Chapter 5 CVS-841/851 Basic Operation [CVS-851] Enlarged POWER/BRIGHTNESS control with a switch Turns on or off the unit and adjusts the brightness of the image. H FREQ STC DEPTH control VRM key Varies the effective range of Turns on or off VRM. It also selects the VRM mode.

  • Page 43: Image Display

    CVS-841/851 Chapter 5 Basic Operation 5.1.2 Image display Shift position (depth) Image speed Date, Day, Time Image Mode (See Note) Time mark 2 0 0 2 / 0 2 / 1 3 ( Wed) ００００ High 1 4 : 2 2 : 5 6...

  • Page 44: Selecting Normal Image Mode

    Chapter 5 CVS-841/851 Basic Operation 5.2.2 Selecting NORMAL image mode (1) Turn the MODE switch to NORMAL (High or Low). (2) The selected image display mode will be shown in the center of the screen and it disappears automatically in approximately 5 seconds. The display mode will be shown in the upper left corner of the screen, i.e.

  • Page 45: Setting The Receiver Gain

    CVS-841/851 Chapter 5 Basic Operation 5.2.4 Setting the receiver gain Turn the H FREQ GAIN or L FREQ GAIN control as appropriate to make the bottom echo displayed in red. [CVS-841] Low Frequency GAIN control High Frequency GAIN control The effect of GAIN control on the image...

  • Page 46: The 3-Division Screen And Its Gain Control

    5.2.5 The 3-Divion screen and its gain control Setting the MODE switch to “3” (CVS-841) or USER 3 (CVS-851) allows the 3-Division screen to be displayed. In this mode, two HIGH Frequency screens (H1 and H2 for convenience) and one LOW Frequency screen are displayed.

  • Page 47: Setting The Stc

    CVS-841/851 Chapter 5 Basic Operation 5.2.6 Setting the STC The STC (Sensitivity Time Control) is used to reduce the receiver gain in proportion to time, which is useful to eliminate nearby unwanted echoes like plankton, jelly fish, etc. There are two STC controls provided, STC Depth and STC Amplitude.

  • Page 48: Setting The Enhance Function

    Chapter 5 CVS-841/851 Basic Operation Operational notes for the STC law . STC law A: STC is not enough, causing the noise and unwanted residual weak echoes in a shallow or mid depth zone to be shown. . STC law B: STC is appropriate, causing unwanted echoes to be perfectly reduced while schools of fish are shown without degradation.

  • Page 49: Changing The Display Position In The 3-Division Screen

    CVS-841/851 Chapter 5 Basic Operation 5.2.8 Changing the display position in the 3-division screen Use the following procedure to change the display position. (1) Press the MENU key and select Display. The Display sub menu will be shown. MENU (2) Select “User 3” and press the Right arrow key to select the User 3 sub menu.

  • Page 50: Displaying The Dual Images

    Chapter 5 CVS-841/851 Basic Operation 5.3 Displaying the dual images 5.3.1 High Frequency and Low Frequency images (1) Select DUAL FREQ mode. (2) Low Frequency image is shown on the left and High Frequency image on the right of the screen.

  • Page 51: Displaying Low Frequency Norm/Zoom Image

    CVS-841/851 Chapter 5 Basic Operation NOTE: These modes are dual display, available only on the same frequency. The Bottom Zoom image is displayed on a single screen only. 5.3.3 Displaying Low Frequency NORM/ZOOM image (1) (1) Select Low Frequency ZOOM mode.

  • Page 52: Setting The Partial Zoom Position In Norm/Zoom Mode

    Chapter 5 CVS-841/851 Basic Operation 5.3.5 Setting the partial zoom position in NORM/ZOOM mode (1) Select ZOOM in NORM/ZOOM mode. To do so proceed as follows: Menu -> Display -> Zoom Type -> ZOOM (2) Select Zoom Range. To do so proceed; Menu -> Display -> Zoom Range and then select the zoom range out of the following depth selections.

  • Page 53: Using The Vrm In Normal Mode

    CVS-841/851 Chapter 5 Basic Operation 5.4.1 Using the VRM in NORMAL mode 1 4 : 2 2 : 5 6 High Shift Image Speed 1/1 2001/05/23(Wed) 0000 (1) Press the key. The digital VRM display previously activated is shown highlighted (black letters with...

  • Page 54: Using The Vrm In Dual Image Mode

    Chapter 5 CVS-841/851 Basic Operation 5.4.2 Using the VRM in Dual Image mode 5.4.2.1 Vertical split screen, Dual Frequency mode (1) Press the VRM key. The last active VRM High Shift Image Speed 1/1 2001/05/23(Wed) 1 4 : 2 2 : 5 6 digital display will be highlighted.

  • Page 55: Horizontal Split Screen, Dual Frequency Mode

    CVS-841/851 Chapter 5 Basic Operation Image Speed 1/1 14:22:5 High Shift 0000 2001/05/23(We (3) To change the VRM control from one to the other, use the following procedure: (4) To activate the left VRM, 1 0 0 1 0 0...

  • Page 56: Selecting The Image Speed

    Chapter 5 CVS-841/851 Basic Operation 5.5 Selecting the image speed The image speed is related to the frequency of transmission. For instance, an image speed of 2/1 indicates that the image is moved twice each time transmission takes place. To select the image...

  • Page 57: Operating The Shift Key

    CVS-841/851 Chapter 5 Basic Operation To use: (1) Press the IR key. Pop-up window will High 2001/05/23 (Wed) 14:22:56 Shift Image Speed 1/1 appear here on the screen. Interference Reject (2) Press the UP or DOWN arrow key to 1 0 0 change the IR setting that varies from OFF, 1 (Mid) and 2 (Intense).

  • Page 58: Setting The Auto Shift Function

    Chapter 5 CVS-841/851 Basic Operation The Shift starting depth is shown here High 2001/05/23 (Wed) 14:22:56 Shift Image Speed 1/1 Shift start depth 1 0 0 Range 1 5 0 2 0 0 1 7 0 Figure 5.24 Fix Shift mode display 5.7.2 Setting the Auto Shift function...
  • Page 59 CVS-841/851 Chapter 5 Basic Operation (3) Press the left arrow key to reject the selected color. To resume the color, press the right arrow key. (4) The pop-up window will automatically disappear in 5 seconds after the operation. 2001/05/23 (Wed)

  • Page 60: Setting The Alarm Function

    Chapter 5 CVS-841/851 Basic Operation 5.9 Setting the Alarm Function There are two alarms available, the Depth Alarm and Fish Alarm. 5.9.1 Depth alarm The Depth alarm is activated when the sea bottom becomes shallower or deeper than a preset depth range.
  • Page 61 CVS-841/851 Chapter 5 Basic Operation High 14:22:5 Image Speed 1/1 2001/05/23(Wed) Shift A l a r m D e p t h A l a r m O F F 1 0 0 F i s h A l a r m...

  • Page 62: Fish Alarm

    Chapter 5 CVS-841/851 Basic Operation 5.9.2 Fish alarm The Fish Alarm is an audio alarm, which is activated when fish echoes enter a predetermined depth range or fulfill the predetermined threshold in terms of its signal intensity and length. Pressing any key on the operation panel can silence the alarm.
  • Page 63 CVS-841/851 Chapter 5 Basic Operation Setting the Alarm color: Setting the Alarm color: (Assuming the main menu is shown) (1) Press the up or down key to highlight ALARM COLOR. (2) Press the right arrow key to select ALARM COLOR selection menu.
  • Page 64 Chapter 5 CVS-841/851 Basic Operation Now, return to upper level menu to proceed to next setting, the Signal Color. Select the Signal Color. Fish Alarm Fish Alarm Upper Alarm Upper Alarm Lower Alarm Lower Alarm Alarm Color Alarm Color Alarm Sig. Length Long Alarm Sig.

  • Page 65: Operating The Event Key

    CVS-841/851 Chapter 5 Basic Operation 5.10 Operating the EVENT key The EVENT key is used to mark ship’s position instantly, useful for storing the position of an event such as a man-overboard accident, a dense fish-echo sounding, etc. To use this function, simply press the EVENT key switch.
  • Page 66 CVS-841/851 Chapter 6 Using menus Chapter 6 Using menus Contents Page No. 6.1 The key switches used............6-1 6.2 Operating procedure of the menu driven functions .... 6-1 6.3 Confirming the factory initial settings ........6-3 6.4 Menu list .................. 6-4 6.5 Descriptions of the menu functions ........
  • Page 67 Chapter 6 CVS-841/851 Using menus Page No. 6.6.14 Image partition ............... 6-12 6.6.15 Image swap................6-12 6.6.16 Color Bar scale ..............6-13 6.6.17 Present position ..............6-13 6.6.18 Boat speed................6-13 6.6.19 Bearing................... 6-13 6.6.20 Water Temp................6-13 6.6.21 Water Temp graph..............6-13 6.6.22 Event position ................
  • Page 68 CVS-841/851 Chapter 6 Using menus Page No. 6.10 Initialize..................6-19 6.10.1 User setting................6-19 6.10.2 Factory default ................6-19 6.11 Simulator ..................6-20 93132682-00 Contents-3...

  • Page 69: The Key Switches Used

    CVS-841/851 Chapter 6 Using menus Chapter 6 Using the menu 6.1 The key switches used This chapter describes the operating procedures of 4-way arrow keys menu driven functions, which is activated by pressing the MENU key switch. The following key switches are...
  • Page 70 Chapter 6 CVS-841/851 Using the menu [Selecting a sub menu item] A press of the up or down arrow shifts highlighted part up or down by one step. Pressing and holding either the up or down arrow key shifts the...

  • Page 71: Confirming The Factory Initial Settings

    CVS-841/851 Chapter 6 Using menus 6.3 Confirming the factory initial settings CAUTION: The unit has been set to factory initial settings. Before operating the unit, confirm their settings by using the following procedure. Menu Transmission Image Initialize Display User Settings...

  • Page 72: Menu List

    Chapter 6 CVS-841/851 Using the menu 6.4 Menu list Menu Sub Menu 1 Sub Menu 2 Parameters Transmission Pulse Width (H) Super Short, Short, Middle, Long Pulse Width (L) Super Short, Short, Middle, Long Output Normal, Low 1 - 10...

  • Page 73: Descriptions Of The Menu Functions

    6.5.1 Transmission 6.5.1.1 Pulse Width (H) (L) Definition and detectable depth of a sounder varies depending on the pulse width. The CVS-841/851 series sounder has 4 selectable pulse widths (Super Short, Short, Middle, Long) for High and Low frequencies. The characteristic of each pulse width is as follows:...

  • Page 74: Output

    Chapter 6 CVS-841/851 Using the menu 6.5.1.2 Output (Normal and Low) This function increases or decreases the sounder power output in two steps, Normal and Low. In normal operation, this setting should be set to Normal (High level). In case the need is arisen to reduce the power, such as an inspection of acoustic power output, set the setting to Low (Low level).

  • Page 75: Image

    6.5.2.2 Color tone Varies the sonar color tone in 3 ways as follows. Selections: 1, 2, 3 (steps) 1: 16 colors (KODEN standard color) 2: 16 colors (White not inclusive) 3: 8 colors (KODEN standard color) Initial setting: 1 6.5.2.3 Background color...

  • Page 76: Mix Type

    Chapter 6 CVS-841/851 Using the menu 6.5.2.5 Mix type This mode of function enables quick and easy finding of small fish like young sardines utilizing the intrinsic nature of acoustic wave. As widely known, small fish are sensitive to the high frequency waves where the wavelength is closer to the length of the fish.

  • Page 77: Flicker Rejection

    CVS-841/851 Chapter 6 Using menus C (SELECTION) mode: This method is similar to A mode in principle, however, the process in determining display color is different. If the High Frequency echo is predominant against those of Low Frequency, the resultant color is displayed in colors shown in High Frequency image.

  • Page 78: Information Window

    Selections: ON, OFF Initial setting: OFF NOTE 1: The Information Window feature is not available in CVS-841. CAUTION: The following external devices must be connected to display the information in the window: A navigation receiver that supplies the NMEA serial data for own ship position, event position and own ship’s speed indications.

  • Page 79: Zoom Range

    CVS-841/851 Chapter 6 Using menus B.Z (Bottom Zoom) Bottom image can be zoomed with reference to the seabed. Equally spaced depth markers are shown Depth markers in a solid line. Selections: BTM, BD, ZOOM, B.Z. Zoomed range Initial setting: BTM Zoom range 6.6.4 Zoom range...

  • Page 80: Scale

    Chapter 6 CVS-841/851 Using the menu 6.6.9 Scale Sets up the position of the depth scale on the screen. The choices are; a single scale display shown at the right hand side of a single or dual screen or; dual scale displays shown in the left hand side of each screen.

  • Page 81: Color Bar Scale

    CVS-841/851 Chapter 6 Using menus 6.6.16 Color Bar scale Turns on or off color bar scale, which is shown on the left side of the screen. Selections: ON, OFF Initial setting: ON 6.6.17 Present position Turns on or off the boat position display (position display in latitude/longitude or LOP).

  • Page 82: Event Position

    Chapter 6 CVS-841/851 Using the menu 6.6.22 Event position Turns on or off the Event position display and selects its unit in latitude/longitude or LOP (Time Difference). In case the Boat Position is set to OFF, the Event position is displayed in latitude/longitude.

  • Page 83: Auto Shift

    CVS-841/851 Chapter 6 Using menus 6.7.2 Auto shift Displays a seabed echo of varying depth within the screen. When the seabed depth becomes shallower than 40% or, deeper than 90% of the full depth scale, the entire image will be reset to 65% of the scale, keeping the seabed echo always shown within the screen.

  • Page 84: Draft Setting

    Chapter 6 CVS-841/851 Using the menu (2) For feet (Applicable to all models) 10, 15, 20, 30, 40, 50, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, 320, 340, 360, 380, 400, 440, 480, 520, 560, 600, 640, 680, 720, 760, 800, 840, 880, 920, 960, 1000, 1040, 1080,...

  • Page 85: Sonic Correction

    NMEA 0183 data. Select INT or EXT in the Water Temp Data sub menu for available sensor or NMEA data. INT: Selects KODEN water temperature sensor ST-80-1/90-1/100-1. In case no water temperature data is supplied, “0.0” will be displayed in the water temperature digital window.

  • Page 86: Ext Trigger Type

    Chapter 6 CVS-841/851 Using the menu temperature data is supplied, “xxx.x” will be shown in the water temperature digital window. Selection: INT, EXT Initial setting: EXT 6.8.14 EXT Trigger type Selects the external trigger pulse polarity. Selections: OFF/ (Triggered on the leading edge) /...

  • Page 87: Color Customize

    CVS-841/851 Chapter 6 Using menus 6.9.3 Color customize All colors used on the screen can be customized to your preference. There are 256 color palettes available in total. Each palette has Red, Green and Blue sub palettes with 256 color tones available.
  • Page 88 (4) To change the setting, repeat the above procedures from step (1). 6.11 Simulator Displays simulated sonar echoes for training and exhibition purposes of CVS-841/851 series sounder. To display the simulated echoes, select ON and exit the menu. To turn off the Simulator, select OFF and exit the menu.
  • Page 89 CVS-841/851 Chapter 7 Functional Registrations Chapter 7 Functional Registration Contents Page No. Depth range registration ........... 7-1 Image mode registration ........... 7-4 7.2.1 Registering functions to USER 1 and 2........ 7-4 7.2.2 Registering functions to USER 3.......... 7-6 7.2.3 Registering a ZOOM type ............ 7-7 7.2.3.1 BTM/NORM display .............

  • Page 90: Depth Range Registration

    CVS-841/851 Chapter 7 Functional Registration Chapter 7 Functional Registration Registration This chapter describes the procedures to register the user defined functional parameters to the Range This chapter describes the procedures to register the user defined functional parameters to the Range and MODE switches.
  • Page 91 Chapter 7 CVS-841/851 Functional Registration Registering the range Depth Range Preset Figure 7.2 Depth range registration (2) (6) Press the up or down arrow key to select the depth range. (7) Press the MENU or left arrow key to return to Depth Range Preset sub menu for other depth range registeration.
  • Page 92 CVS-841/851 Chapter 7 Functional Registration (8) Repeat the above procedures to register other depth ranges to each range number. (9) To exit from the menu press the MENU key or the left arrow key in the following sequence. System Time...

  • Page 93: Registering Functions To User 1 And 2

    Chapter 7 CVS-841/851 Functional Registration 7.2 Display mode registration 7.2.1 Registering functions to USER 1 and 2 (1) Press the MENU key to display the main menu. (2) Press the down arrow key to highlight DISPLAY. (3) Press the right arrow key to show the DISPLAY sub menu list. Pressing the down arrow key scrolls 3 pages of the sub menu as shown below.
  • Page 94 CVS-841/851 Chapter 7 Functional Registration The items and their image arrangements available in the USER 1 menu are as follows: NORM User 1 NORM H/MIX L/MIX H/L/MIX H/EN L/EN Acronym: H/BTM/L/BTM NORM: Normal Display BZ: Bottom Zoom Display H/B.D./L/B.D. LK: Bottom Lock Display...
  • Page 95 Chapter 7 CVS-841/851 Functional Registration 7.2.2 Registering functions to USER 3 (1) Press the MENU key to display the menu. (2) Press the right arrow key to select User 3. Further press the right arrow key to display the User 3 selection window.

  • Page 96: Registering A Zoom Type

    CVS-841/851 Chapter 7 Functional Registration 7.2.3 Registering a ZOOM type There are four types of the zoomed image, BTM, BD, ZOOM and B.Z. which can be applied to ZOOM mode, selected by the MODE switch. The abbreviations of these terms are as follows: BTM：Bottom Lock (Dual screen)
  • Page 97 Chapter 7 CVS-841/851 Functional Registration [For High Frequency settings] Available Image Layout Mode switch setting BTM (H) NORM (H) BD(H) NORM(H) CVS-841 CVS-851 ZOOM (H) NORM(H) B.Z. (H) [For Low Frequency settings] Available Image Layout Mode switch setting BTM (L)

  • Page 98: Btm/Norm Display

    CVS-841/851 Chapter 7 Functional Registration 7.2.3.1 BTM/NORM display This mode of image is a combination of normal and BTM (Bottom Zoom) images. In the BTM image, the seabed echo is shown flat and fixed to the bottom of the screen with fish echoes shown within the depth specified by the user.

  • Page 99: Image

    Chapter 7 CVS-841/851 Functional Registration 7.2.3.4 B.Z. image This mode of image is a single, partial zoomed sonar image, referenced to the seabed. Equally spaced depth markers are also displayed, which are referenced to the surface of the seabed. BOTTOM ZOOM image...
  • Page 100 CVS-841/851 Chapter 7 Functional Registration Main Menu => Image => Enhance Menu Menu Image Transmission Transmission Enhance 25 db Image Image Color Tone Display Display Background Color Automatic Automatic White Line System System Mix Type White Line Customize Customize Flicker Rejection...

  • Page 101: Setting The 3-Division Screen (H/L) And Gain

    Chapter 7 CVS-841/851 Functional Registration 7.4 Setting the 3-Division Screen (H/L) and gain (1) Set the MODE switch to USER 3. (2) The gain adjustment for High Frequency 1 can be made with the H FREQ GAIN control. (3) The gain adjustment for Low Frequency can be made with the L FREQ GAIN control.
  • Page 102 CVS-841/851 Chapter 7 Functional Registration The current setting is being set to Shift mode. Press the SHIFT The High Frequency 2 gain control can be key to turn this mode off. made with up and down keys. 1 4 : 2 2 : 5 6 SHIFT ００００...
  • Page 103 CVS-841/851 Chapter 8 Trouble Shooting Chapter 8 Trouble Shooting Contents Page No. 8.1 Information required for service ..........8-1 8.2 Self check function..............8-1 8.3 Trouble shooting ............... 8-1 8.4 Setting the video threshold ............8-3 93132682-00 Content...
  • Page 104 (6) Faulty conditions and the result of on board check 8.2 Self check function When the CVS-841/851 is first turned on, a system check program runs to diagnose system functions. If the result is found normal, the message “System check OK” will appear on the screen. If this sign does not appear, there is a possibility of system failure.
  • Page 105 Chapter 8 CVS-841/851 Trouble Shooting (Fault finding chart for CVS-841/851) Remedial action against negative Faults detected Possible cause of the failure result No depth indication but 1. Is the bottom echo displayed 1. Select an appropriate depth XXXX shown. within the display? range in which the bottom is 2.
  • Page 106 CVS-841/851 Chapter 8 Trouble Shooting 8.4 Setting the video threshold The bottom detection capability of the sounder may be affected by the transmitting power level, frequency, transducer type, and its mounting location in the hull. If you encounter unstable digital bottom depth indication on the display, please use the following procedure to obtain a correct and stable bottom depth indication.
  • Page 107 Chapter 8 CVS-841/851 Trouble Shooting (1) Setting too low (Approx –80). A school of fish is mistakenly detected as a bottom. High 2 0 0 2 / 0 2 / 1 3 (Wed) 14:22:56 Shift Image Speed 1/1 (2) Setting too high (Approx 40) A bottom is not detected.
  • Page 108 CVS-841/851 Chapter 9 Maintenance Chapter 9 Maintenance Contents Page No. Periodic inspection and cleaning........9-1 9.1.1 Monthly check ................ 9-1 9.1.2 Yearly check ................9-1 93132682-00 Contents...
  • Page 109 CVS-841/851 Chapter 9 Maintenance Chapter 9 Maintenance 9.1 Periodic inspection and cleaning To prolong the equipment life, the following maintenance should be performed on a routine basis. Also, from time to time, check plug connections and cables. 9.1.1 Monthly check If the display screen is dirty, clean the screen with a soft cloth damped with anti-static agent or pure water.
  • Page 110 CVS-841/851 Chapter 10 Technical References Chapter 10 Technical References Page No. 10.1 Serial input data ..............10-1 10.2 Details of input sentences........... 10-1 10.3 Serial output data..............10-3 10.3.1 Details of output data sentences..........10-3 10.3.2 Output signal specification ............. 10-3 10.4...

  • Page 111: Chapter 10 Technical References

    CVS-841/851 Chapter 10 Technical References Chapter 10 Technical References 10.1 Serial input data Data format: NMEA-0183 Ver. 1.5 and 2.0 10.2 Details of input sentences NOTE: Checksum is a total sum of EX-ORed data that are put between the $ and asterisk (*) signs.
  • Page 112 Chapter 10 CVS-841/851 Technical References Name & Data name Version Water temperature Ver.1.5 $ - - MTW, xx.x, C *hh <CR><LF> Sentence Checksum name Temperature( Talker device code Start of sentence Recommended minimum specific GPS data RMC, hhmmss, A, xxxx.xxx, N/S, xxxx.xxx, E/W, xxx.x, xxx.x, xxxxxx, *hh <CR><LF>...

  • Page 113: Serial Output Data

    CVS-841/851 Chapter 10 Technical References 10.3 Serial output data Data format: NMEA-0183 Ver. 1.5 and 2.0 10.3.1 Details of output data sentences NOTE: Checksum is a total sum of EX-ORed data that are put between the $ and asterisk (*) signs.
  • Page 114 Chapter 10 CVS-841/851 Technical References Sentence name Name & Version Depth (From the transducer surface to the seabed) Ver.1.5 $ SD DBT, xxxx.x, f, xxxx.x, M, xxx.x, F *hh <CR><LF> Sentence Depth (meters) Checksum name Depth (feet) Depth (fathom) Talker device code...

  • Page 115: Data Input/Output Serial Line

    CVS-841/851 Chapter 10 Technical References 10.4 Data input/output serial line Port name: J2 The connector used: Type LTWD-06BFFA-L180 Serial Data input (listener side): +Vcc The IEC 61162-1 standard signal can be received. Input load: 470 ohms Device: Opto-coupler A Data Input...
  • Page 116 CVS-841/851 Annex Sheets Annex Sheets Contents Page No. User setting list..............A-1 Factory default list............... A-3 A2.1 Dedicated key functions ............A-3 A2.2 Menu functions ............... A-3 A2.3 Depth range preset default values ......... A-5 93132682-05 Contents...
  • Page 117 Event Direction Event Elapsed Time Automatic Auto Range Auto Shift Time( System Note2) Depth Unit (Note2) Depth Range Preset CVS-841 has no Year, Draft Setting Month, Day, a Day of the Week displays. Bottom Start Bottom Detection Bottom Detection Adjust 93132682-00...
  • Page 118 Annex Sheets CVS-841/8521 User 1 User 2 User 3 User 4 Menu Depth Measurement System Sonic Correction Boat Speed Correction Water Temp Correction Speed Data Water Temp Data EXT Trigger Type Language Customize GAIN Property STC Property Color Customize Palette No.(Palette Color)
  • Page 119 Mix Type Flicker Rejection Past Image Display A Scope Information Window Note1) (Note1) The Information Zoom Type window feature is not available in CVS-841. Zoom Range User 1 User 2 H(1)/H(2)/L H(1)/H(2)/L H(1)/H(2)/L User 3 H(1)/H(2)/L Depth Value Large Large...
  • Page 120 Time( Note2) 00:00:00 00:00:00 00:00:00 00:00:00 Depth Unit J.fm (Note2) CVS-841 has no Depth Range Preset default values Depth Range Preset Refer to A2.2.3 “ for default values”. Year, Month, Day, Draft Setting a Day of the Week displays. Bottom Start 17.0...
  • Page 121 CVS-841/851 Annex Sheets A2.3 Depth range preset default values Depth Range Preset Factory Default 1(m) Factory Default (J.fm) Factory Default 3(m) Factory Default 4(ft) 1600 1000 1000 3200 1200 1000 1200 4000 3kW/5kW 1600 1000 1000 3200 1500 1000 1500...

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