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81254.book Page 2 Monday, March 6, 2006 2:29 PM Trademarks and registered trademarks Raymarine is a registered trademark of Raymarine plc. All other product names are trademarks or registered trademarks of their respective owners. Contents of this handbook © Raymarine 2006.
81254.book Page 3 Monday, March 6, 2006 2:29 PM 3 Contents Important Information .........................................................................................7 Intended Use .................................................................................................. 7 Safety Notices ............................................................................................... 7 EMC Conformance .................................................................................
81254.book Page 4 Monday, March 6, 2006 2:29 PM 4 DSM25 Owner’s Handbook 3.5 3.6 3.7 3.8 3.9 3.10 Operating Frequency ............................................................................31 Power Settings ......................................................................................32 Zoom ....................................................................................................33 Adjusting the zoom ........................................................................
81254.book Page 5 Monday, March 6, 2006 2:29 PM 5 Chapter 5: Maintenance and Problem Solving ...............................................49 5.1 Maintenance ........................................................................................ 49 Routine Checks .................................................................................... 49 Cleaning Instructions ........................................................................... 49 EMC Servicing and Safety Guidelines ...................
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81254.book Page 7 Monday, March 6, 2006 2:29 PM 7 Important Information Intended Use Raymarine DSM25 Digital Sounder Modules provide echo sounder data that can be displayed on A65 Multifunction Display units. DSM25s are intended for recreational depth finding and fish finding purposes. Echo sounder systems require an appropriate Raymarine transducer unit and inter-connecting cable. Depending on the type of transducer connected, the DSM25 can also display temperature, distance traveled, and/or speed.
1254.book Page 8 Monday, March 6, 2006 2:29 PM 8 DSM25 Owner’s Handbook If the transducer cable is accidentally removed while the DSM25 is powered on, remove power from the sounder module, replace the transducer cable, and then return power to the module. As a safety feature, the DSM25 only recognizes that the transducer is connected at power-up. CAUTION: Ultrasonic Energy The transducer transmits high frequency energy while in use.
81254.book Page 9 Monday, March 6, 2006 2:29 PM Important Information 9 • Raymarine specified cables are used. Cutting and rejoining these cables can compromise EMC performance and must be avoided unless doing so is detailed in the installation manual. Suppression Ferrites If a suppression ferrite is attached to a cable, this ferrite should not be removed. If the ferrite needs to be removed during installation it must be reassembled in the same position.
81254.book Page 10 Monday, March 6, 2006 2:29 PM 10 DSM25 Owner’s Handbook Conventions Throughout this handbook, the dedicated (labelled) keys are shown in bold capitals (for example, ENTER). The soft key functions, menu names and options are shown in normal capitals (for example, SCREEN). Technical Accuracy The technical and graphical information contained in this handbook, to the best of our knowledge, was correct as it went to press.
81254.book Page 11 Monday, March 6, 2006 2:29 PM 11 Chapter 1: Overview 1.1 Introduction D7737-1 This handbook describes how to install the DSM25 Digital Sounder Module and operate it using the A65 display unit. The DSM25 emits and receives sonar signals from a transducer mounted in the water, then interprets and transmits the data to the A65 installed on the console.
81254.book Page 12 Monday, March 6, 2006 2:29 PM 12 DSM25 Owner’s Handbook 1.2 What the Sounder Displays When you first view the Fishfinder application on the A65, an image representing the echoes received by the DSM is displayed. As time passes this image scrolls from right to left and becomes a record of the data collected. The images at the right hand side of the display are therefore the most recent.
81254.book Page 13 Monday, March 6, 2006 2:29 PM Chapter 1: Overview 13 1.3 How the Fishfinder Works The Fishfinder application uses the DSM25 to process sonar signals from a suitable transducer and provide a detailed underwater view. The transducer located on the bottom of the boat sends pulses of sound waves into the water and measures the time it takes for the sound wave to travel to the bottom and back.
81254.book Page 14 Monday, March 6, 2006 2:29 PM 14 DSM25 Owner’s Handbook The dark layers indicate a good echo; the lighter areas weaker echoes. This could mean that the upper layer is soft and therefore allowing sound waves to pass to the more solid layer below. It is also possible that the sound waves are making two complete trips – hitting the bottom, bouncing off the boat, then reflecting off the bottom again. This can happen if the water is shallow, the bottom is hard, or gain is set high.
81254.book Page 15 Monday, March 6, 2006 2:29 PM Chapter 1: Overview 15 Target Depth ID Target Although weaker than the fish or bottom echoes, your fishfinder picture may be impaired by echoes received from floating or submerged debris, air bubbles or from your boat’s movements. This is known as background noise or clutter and is controlled by the gain modes (gain, color gain and TVG).
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81254.book Page 17 Monday, March 6, 2006 2:29 PM 17 Chapter 2: DSM25 Installation 2.1 Introduction This chapter provides details for mounting the DSM25 and connecting to the A65 display. For the system to display depth, water temperature and speed, you must install the transducer type(s) capable of transmitting the appropriate data.
81254.book Page 18 Monday, March 6, 2006 2:29 PM 18 DSM25 Owner’s Handbook 2.3 Optional Equipment If a longer connection is required from the DSM to the display, you can purchase one of the following A65 Network Cables from Raymarine. Be sure to install the suppression ferrites, if supplied. Description Part No A65 Network Cable, 8.5m E36015 A65 Network Cable 15m E36016 2.
81254.book Page 19 Monday, March 6, 2006 2:29 PM Chapter 2: DSM25 Installation 19 • Status LED: Mount the unit where you can view the status LED on the front fascia. See page 53 for details. D8722-1 Status LED CAUTION: Do Not Remove Transducer Cable when Powered On Removing the transducer cable from the DSM25 while power is turned on can cause sparks. As with any electronic device, be sure the sounder module is mounted where it is well ventilated and free from gasoline fumes. 2.
81254.book Page 20 Monday, March 6, 2006 2:29 PM 20 DSM25 Owner’s Handbook Ver t ica x2 l D7740-1 3. Drill a 9/64" (3mm) pilot hole at each of the marked locations. Ver t ica l x2 D7741-1 Note: For fiberglass with a gelcoat surface, you should overdrill the surface to prevent the gelcoat from chipping when driving in the screw. Before drilling the pilot hole, hand drill the marked location with an oversized bit and countersink to approximately 3/8" (9mm) diameter. 4.
81254.book Page 21 Monday, March 6, 2006 2:29 PM Chapter 2: DSM25 Installation 21 5. Mount the module to the surface, slipping the screw heads through the two key holes. 6. Press the module downward so the screws align with the narrow end of the keyholes. 1 2 3 m 6 m um im min D7742-1 7. Tighten the screws until secure. Do not overtighten. 2.6 Cable Runs You will need to run the following cables: • Data/power cable, supplied with the DSM25. This 11.5 ft (3.
81254.book Page 22 Monday, March 6, 2006 2:29 PM 22 DSM25 Owner’s Handbook • Secure cables in place using tie-wraps or lacing twine. Coil any extra cable and tie it out of the way. CAUTION: Do Not Cut or Splice the Transducer Cable • There is high voltage on the transducer cable. Splicing could create a safety hazard. • Cutting the transducer cable severely reduces sonar performance. If the cable is cut, it must be replaced—it cannot be repaired.
81254.book Page 23 Monday, March 6, 2006 2:29 PM 23 Chapter 3: Using the Sounder Module 3.1 Introduction The standard fishfinder image is an historical, scrolling bottom graph at an automatically selected range and frequency.
81254.book Page 24 Monday, March 6, 2006 2:29 PM 24 DSM25 Owner’s Handbook 3.2 Selecting the Display Page Before viewing fishfinder functions, you must select the fishfinder page on the A65 display. The display provides you with different window configurations for presenting information. To change the display pages: 1. Press the PAGE key. The associated soft keys are displayed: CHART FISHFINDER D7895-1 2. Press the FISHFINDER soft key.
81254.book Page 25 Monday, March 6, 2006 2:29 PM Chapter 3: Using the Sounder Module 25 • Chart/Fishfinder Page Split windows displaying sounder and chart information 12nm Csr Pos N-UP N 26°42.618 (RM) W 078°31.
81254.book Page 26 Monday, March 6, 2006 2:29 PM 26 DSM25 Owner’s Handbook • Fishfinder/Temperature Graph Page Split windows displaying sounder and a graph plotting water temperature readings from the transducer over the past 60 minutes 0 Temperature 20 71.5° F 74 74 73 73 72 72 71 71 70 70 69 69 68 68 60 50 40 30 20 10 Minutes Speed 40 60 60 FISHFINDER SETTINGS ZOOM 0 - + 13.5 V 4.6 kts Log nm Trip nm 71.5°F N 26°16.618 W 080°04.961 28.
81254.book Page 27 Monday, March 6, 2006 2:29 PM Chapter 3: Using the Sounder Module 27 Using the Course Deviation Indicator (CDI) With your display receiving accurate heading and position information, you can use the CDI to monitor your course and accurately steer to a target waypoint. The CDI gives a graphical representation of yours boat’s course in a ‘rolling road’ format.
81254.book Page 28 Monday, March 6, 2006 2:29 PM 28 DSM25 Owner’s Handbook 3.3 Adjusting the Display This section describes the controls you can use to change how sounder data is displayed on the A65 in Fishfinder mode. Range RANGE RANGE AUTO MAN SHIFT 0 ft D8622-2 The DSM automatically adjusts the display to show the shallowest required range. Alternatively, you can select to range in/out on the image (up to the maximum depth displayed on the scrolling bottom and A-Scope images).
81254.book Page 29 Monday, March 6, 2006 2:29 PM Chapter 3: Using the Sounder Module 29 Soft Key Selections FISHFINDER SETTINGS BOTTOM LOCK ZOOM A-SCOPE PRESENTATION D7935-2 The soft keys presented on the main fishfinder screen provide selections for the most commonly used operations. 3.
81254.book Page 30 Monday, March 6, 2006 2:29 PM 30 DSM25 Owner’s Handbook Auto Gain The GAIN, or sensitivity, of the display adjusts background noise by varying the echo strength for display. The value of the GAIN control determines the strength above which echoes are displayed. There are three AUTO GAIN modes: • LO is ideal for viewing images with a minimum of background noise as you are cruising to your fishing spot. Only the strongest echoes are displayed.
81254.book Page 31 Monday, March 6, 2006 2:29 PM Chapter 3: Using the Sounder Module 31 3. Use the rotary knob to adjust the value in the slider. This value takes immediate effect: • GAIN MODE. This should be set high enough to see fish and bottom detail but without too much background noise. Generally, a high gain is used in deep and/or clear water; a low gain in shallow and/or murky water. • COLOR GAIN. This sets the lower limit for the strongest echo color.
81254.book Page 32 Monday, March 6, 2006 2:29 PM 32 DSM25 Owner’s Handbook To change the frequency to a manual setting: 1. Press FISHFINDER SETTINGS. A new set of soft keys appear. 2. Press FREQUENCY until MAN is highlighted. The SELECTED FREQ soft key is no longer grayed out. 3. Toggle the SELECTED FREQ key until the desired setting is highlighted: • 200. The scrolling bottom is displayed using the selected frequency. • 50. The scrolling bottom is displayed using the selected frequency. • BOTH.
81254.book Page 33 Monday, March 6, 2006 2:29 PM Chapter 3: Using the Sounder Module 33 3.5 Zoom ZOOM FACTOR x2 x3 x4 xR ZOOM RANGE 20ft ZOOM POSITION AUTO MAN ZOOM START 20.0ft D8219-2 . ZOOM ON SPLIT OFF The DSM25 automatically keeps the bottom image in the lower half of the window. When you need to see more detail of the bottom structure or targets, you can zoom in and enlarge a portion of the image. This zoom range box can either replace or appear alongside the standard sounder image.
81254.book Page 34 Monday, March 6, 2006 2:29 PM 34 DSM25 Owner’s Handbook These factors are proportioned to the range. Therefore, as the range increases, the area shown in the zoom window also increases. —or— • XR to adjust manually the range shown in the Zoom window. When using Ranged Zoom, the area shown in the zoom window does not change when the range changes. Press ZOOM RANGE and use the rotary knob to adjust the range as desired.
81254.book Page 35 Monday, March 6, 2006 2:29 PM Chapter 3: Using the Sounder Module 35 30 200 kHz 0 20 20 10 40 49 8 0 ft BOTTOM LOCK B-LOCK B-LOCK RANGE RANGE BOTTOM BOTTOM SHIFT SHIFT ON SPLIT OFF 30ft 20% 30ft 20% 60 D8218-1 Btm Lock Note: If the A-Scope or Zoom image was displayed, selecting Bottom Lock automatically switches OFF A-Scope and Zoom. To display or remove the Bottom Lock image: 1. Press BOTTOM LOCK. The Bottom Lock soft keys are displayed. 2.
81254.book Page 36 Monday, March 6, 2006 2:29 PM 36 DSM25 Owner’s Handbook 3.7 A-Scope A-SCOPE MODE 1 2 3 D8329-2 A-SCOPE ON OFF Use the A-Scope screen to show raw sonar data directly from the transducer beam. This gives you a “real time” image of fish and bottom structure directly below the transducer. This function is very useful in showing the strength of the echo returned from a fish.
81254.book Page 37 Monday, March 6, 2006 2:29 PM Chapter 3: Using the Sounder Module 37 3.8 Presentation VRM... WHITE LINE ON OFF BOTTOM FILL ON OFF SCROLL AUTO MAN SCROLL PAUSE RESUME D8220-2 You can further adjust the fishfinder image using features accessed via the PRESENTATION soft keys: White Line and Bottom Fill These two related features help better define images near the bottom.
81254.book Page 38 Monday, March 6, 2006 2:29 PM 38 DSM25 Owner’s Handbook White Line and Bottom Fill together When both White Line and Bottom Fill are applied, the bottom is defined by a white line and the detail below it replaced by a single contrasting color. Both the bottom and fish near the bottom are now clearly defined. To display/hide White Line and/or Bottom Fill: 1. Press PRESENTATION. 2. Press WHITE LINE or BOTTOM FILL to toggle the feature OFF or ON as desired. 3.
81254.book Page 39 Monday, March 6, 2006 2:29 PM Chapter 3: Using the Sounder Module 39 SCROLL PAUSE/RESUME Select SCROLL PAUSE to pause the display to see a ‘snapshot’ of the image. This allows you to inspect the paused image and place waypoints or VRMs. PAUSE affects all fishfinder windows, including split Frequency, Zoom and Bottom Lock modes. When SCROLL PAUSE is selected, the display stops scrolling but the depth indication continues to be updated.
81254.book Page 40 Monday, March 6, 2006 2:29 PM 40 DSM25 Owner’s Handbook 3.10 Using Waypoints Marking a position enables you to return to that spot at a later date. A position is marked on the screen with a waypoint. When a waypoint is placed, its details are added to the Waypoint List and a vertical line labelled WPT (see illustration below) is displayed on screen.
81254.book Page 41 Monday, March 6, 2006 2:29 PM 41 Chapter 4: Fishfinder Setup Fishfinder Setup functions can be accessed using the controls that are displayed when you press the MENU key on the A65 display. Note: All settings described in this chapter—except Max. Ping Rate and Ping Enable— are retained when the unit is powered off. To access Fishfinder Setup: 1. Press MENU. The main Setup menu is displayed. Setup System Setup... Alarms Setup... GPS Setup... Display Setup... Diagnostics Menu...
81254.book Page 42 Monday, March 6, 2006 2:29 PM 42 DSM25 Owner’s Handbook Depth Digit Size Depth Lines Palette LARGE OFF CLASSIC/BLUE Depth Offset Speed Calibrate Temp Calibrate 0.0 ft 100% 0.0 F DSM Reset... Trip Reset... Fishfinder Int Rej Second Echo Rej. Max. Ping Rate Ping Enable LOW OFF 26 Pings/Sec. ENABLED D7903-3 Fishfinder Setup ENTER 4. Press the trackpad or rotate the knob to highlight the desired operation.
81254.book Page 43 Monday, March 6, 2006 2:29 PM Chapter 4: Fishfinder Setup 43 4.1 DSM Setup This section details parameters listed in the Fishfinder Setup menu. Depth Digit Size This setting controls the size of the digital depth readout at the lower left of the Fishfinder screen. Choose from the following: • LARGE (default) • SMALL Depth Lines Horizontal dashed lines drawn at regular intervals to indicate the depth from the surface.
81254.book Page 44 Monday, March 6, 2006 2:29 PM 44 DSM25 Owner’s Handbook Depth Offset The depth offset is added to the measured depth value before it is displayed. You can specify the depth as a positive value (WATERLINE OFFSET) or a negative value (KEEL OFFSET). The depth offset can be set adjusted in 0.1 increments of the units you have assigned for Depth Units in the setup parameters of the display unit: meters, fathoms, or feet. The default is 0.
81254.book Page 45 Monday, March 6, 2006 2:29 PM Chapter 4: Fishfinder Setup 45 Interference Rejection (Int Rej) Two or more sonar-equipped vessels operating within range of each other can interfere with sounder operation. This usually appears as vertical streaks on the display that do not represent actual targets. This option can reduce such interference, either manually or automatically. • AUTOMATIC selects the best rejection level for you • LOW minimizes rejection of potential interference.
81254.book Page 46 Monday, March 6, 2006 2:29 PM 46 DSM25 Owner’s Handbook 4.2 Fishfinder Alarms In addition to the A65 system alarms, the following alarms can be set when you are connected to a DSM or when the simulator is on. Each alarm can be toggled ON and OFF and you set the threshold at which the alarms are triggered, except for the fish alarm. To modify the Fishfinder Alarms: 1. Press MENU. 2. Use the trackpad or rotary knob to select Alarms Setup. 3. Navigate to Fishfinder Alarms Setup.
81254.book Page 47 Monday, March 6, 2006 2:29 PM Chapter 4: Fishfinder Setup 47 Fish Alarm If this alarm is ON, the unit sounds a beeper whenever it finds a fish. The default setting is OFF. Fish Sensitivity If the Fish Alarm is set ON, an alarm is triggered when the fish return strength reaches the sensitivity that you specify. Using the rotary knob, select from 1 (lowest sensitivity) to 10 (highest sensitivity). The default setting is 6.
81254.book Page 48 Monday, March 6, 2006 2:29 PM 48 DSM25 Owner’s Handbook The temperature unit used (°C or °F) is dependent upon the Units parameter set in the System Set Up menu. The default setting is OFF. Temp. Range High Use the rotary knob or trackpad up/down keys to increment/decrement the upper threshold for the Temp Alarm. If a temperature above this value is detected, the Temp. Alarm is triggered. You cannot set the Temp. Range High setting to be lower than Temp. Range Low. Temp.
81254.book Page 49 Monday, March 6, 2006 2:29 PM Chapter 5: Maintenance and Problem Solving 49 Chapter 5: Maintenance and Problem Solving This chapter provides information on routine maintenance and on possible causes of problems you may experience with your DSM25. 5.1 Maintenance CAUTION: The sounder unit contains high voltage. Adjustments require specialized service procedures and tools only available to qualified service technicians.
81254.book Page 50 Monday, March 6, 2006 2:29 PM 50 DSM25 Owner’s Handbook Use only a water-based antifouling paint, or a water-based paint specifically designed for transducers. Apply the paint with a brush. If your transducer becomes fouled or stops working because of sand or sea growth, use a stiff brush to clean it. You may sand the surface with a fine-grit wet or dry sandpaper (#320 grade or finer), but this will affect the performance of the unit when the boat is moving at higher speeds.
81254.book Page 51 Monday, March 6, 2006 2:29 PM Chapter 5: Maintenance and Problem Solving 51 5.2 Resetting the Sounder There are two sounder resets available: • Power-on reset • Factory reset Power-on Reset When you the A65 off and on again, all previous DSM settings are retained except for those listed in the following table, which are reset to the factory default. Default values are listed in the descriptions for each function.
81254.book Page 52 Monday, March 6, 2006 2:29 PM 52 DSM25 Owner’s Handbook 5.3 Problem Solving All Raymarine products are, prior to packing and shipping, subjected to comprehensive test and quality assurance programs. However, if this unit should develop a fault, please refer to the following table to identify the most likely cause and the corrective action required to restore normal operation.
81254.book Page 53 Monday, March 6, 2006 2:29 PM Chapter 5: Maintenance and Problem Solving 53 Status LED The LED on the unit front provides valuable information on the status of your DSM25. The LED blinks green while the module is operating normally. If the unit detects a problem, the LED blinks amber to indicate a warning or red for an error. The number of times the LED blinks is a code representing the nature of the problem. For multiple warnings/errors, the codes are given in sequence with a 1.
81254.book Page 54 Monday, March 6, 2006 2:29 PM 54 DSM25 Owner’s Handbook D8722-1 Status LED As an example, if the Transducer Sense fails and the network is not detected, the LED blinks amber once, pauses 1.5 secs, blinks amber twice 0.5 secs apart, pauses 1.5 secs, and then repeats the sequence until the problems are resolved or up to 10 minutes elapse. A solid red LED (not blinking) indicates a fatal error condition.
81254.book Page 55 Monday, March 6, 2006 2:29 PM Chapter 5: Maintenance and Problem Solving 55 In the US Accessories and Parts Many Raymarine accessory items and parts can be obtained directly from your authorized Raymarine dealer. However, if you are in need of an item not available from the retailer, please contact Raymarine Technical Services at: 1-800-539-5539 ext. 2333, or 1-603-881-5200 ext. 2333. Technical Service is available Monday through Friday 4:00 AM to 6:00 PM Eastern Time.
81254.book Page 56 Monday, March 6, 2006 2:29 PM 56 DSM25 Owner’s Handbook The Product Repair Center is open Monday through Friday 8:15 a.m. to 5:00 p.m. Eastern Time. All products returned to the Repair Center are registered upon receipt. Should you wish to inquire about the repair status of your unit, contact the Product Repair Center at: 1-800-539-5539 ext. 2118, or 1-603-881-5200 ext. 2118. Please have the unit serial number, ready when you call.
81254.book Page 57 Monday, March 6, 2006 2:29 PM 57 Appendix: Specifications General Approvals: CE - conform to EN60945:2002 Size: 6.77" x 8.19" x 1.85" (172 x 208 x 47mm) Weight: 0.
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