DS41 Digital Depth Sounder Owner'sManual Standard 2 Inch Installation Dual Station Operation NMEA Repeater Reads in Feet Fathoms or Meters Adjustable Prop or Surface Offset Shallow and Deep alarms Du Sta al Ope tion rati on Contents Specifications ................................................................................................................. 2 Operation ........................................................................................................................ 3 Alarms ........................................................................................................................ 3 Alarms On/Off ............................................................................................................. 3 Shallow Alarm ............................................................................................................ 3 Deep Alarm ................................................................................................................ 4 Instrument Setup ............................................................................................................ 4 Keel/Surface Offset .................................................................................................... 4 Transducer Setting ..................................................................................................... 5 Units of Measure ........................................................................................................ 5 Troubleshooting .............................................................................................................. 6 What comes with your Digital Depth Sounder ............................................................. 7 Standard .................................................................................................................... 7 Options ....................................................................................................................... 7 Replacement Parts .................................................................................................... 8 Installation ...................................................................................................................... 9 Face Plate Installation ................................................................................................ 9 Instrument Installation ................................................................................................ 9 Transducer Installation ............................................................................................. 11 General ............................................................................................................... 11 Sailboats ............................................................................................................ 12 Powerboats ......................................................................................................... 12 Transom Installation ........................................................................................... 13 In-Hull Installation .............................................................................................. 13 Appendix A ­ Dual Station Operation ......................................................................... 14 Master/Slave Selection ............................................................................................ 14 Linked or Separate Selection .................................................................................. 15 Appendix B ­ NMEA Repeater Mode .......................................................................... 16 DS41 Owner's Manual DS41/HS/2G DS41 Owner's Manual Specifications · Size Mount 2" (51mm) diameter hole Depth behind face plate 3.75" (95mm) max. Display 3-character LCD · Operating Voltage 9.5 VDC to 16.5 VDC. · Operating Temperature 0°C to 50°C (32°F to 122°F). · Color Black with texture on bezel. · Current Drain 150mA max, including internal buzzer. · Backlighting Red colored diffused lighting for display. · Data Input/Output Single wire data output/Input. Dual station mode outputs NMEA DPT sentence. Dual station inputs NMEA DPT sentence. In the linked mode a dual station pair also transfer function settings eg. Alarm on/off. · Water Integrity Front will withstand direct water spray. · Depth/Alarm Range 2.0!600 0.6!184 0.3!100 (to 9.9 in feet meters fathoms tenths) · NMEA Output DPT. · Sensitivity 0.05mV RMS. · NMEA Input DPT and DBT. · Transmit Power 36 W RMS nominal at 13.6 VDC. · External Buzzer Output 12VDC Buzzer, 100 mA max. · Transducer 200 kHz 1900 pF/600 W parallel. · RF Interference <6 dB quieting on any marine radio channel (with 3 dB gain antenna) within one meter of the instrument. Complies with CE EMC standards EN50081-1 and EN50082-1. · Display Updating 1 second. Display is backlit for Night Operation Horizon Alarm On/ Change Value Up 888 ^ ON OFF Depth Alarm Off/ Change Value Down V 2 DS41 Owner's Manual Operation Whenever power is applied the depth sounder is active and water depth is displayed. If the sonar signal does not show a bottom the display will indicate "- -". This can occur if the water is aerated or the maximum depth is exceeded. Note: The maximum depth decreases as boat speed increases. Note: The arrow will flash if alarms are turned ON but the shallow alarm is individually set to OFF. See next section. Shallow Alarm To set the shallow alarm: 1. Press the " key for three seconds. The display will show: Alarms Two types of alarms can be set; the Deep Alarm and the Shallow Alarm. The Deep Alarm can be set as high as 184 meters (605 feet) while the Shallow Alarm can be set as low as 0.3 meter (1 foot). Whenever the water depth is greater than the Deep Alarm setting and the alarm is enabled an alarm will sound. The alarm repeats two short beeps and alternates DAL and the water depth on the display. Whenever the water depth is less than the Shallow Alarm setting and the alarm is enabled an alarm will sound. The alarm repeats a single long beep and alternates SAL and the water depth on the display. 2. After a few seconds the display will indicate the current Shallow Alarm depth setting. Alarms On/Off Alarm settings are saved in memory. To turn the alarm on, press the " (ON) key. An arrow on the lower right corner of the display will show (next to the Alarm Bell), to indicate that the alarms are on. 3. Use the " and # keys to change the value. If either key is held depressed for more than one second the reading will increase or decrease rapidly. 4. When the alarm is set, exit by pressing both the " and # keys simultaneously. Alternatively, if no keys are pressed for a period of 5 seconds the normal depth display will resume. ON SAL 8 51 ^ V OFF Press for 3 Seconds ON ^ V OFF To turn the alarms off, press the # (OFF) key. The arrow in the lower right corner will extinguish. 120 # ON ^ V OFF Press simultaneously to exit 120 ON ^ # V OFF Note: If the reading is decreased to below 1.5 feet (or equivalent) the display will show !"" and the alarm will be disabled. The alarm can also be disabled by pressing both the " and # keys for 5 seconds. The word !"" will be displayed but the alarm depth will be retained for future use. DS41 Owner's Manual 3 Instrument Setup Deep Alarm To set the deep alarm: 1. Press the # key for three seconds. The display will show: Keel/Surface Offset An offset may be automatically added to or subtracted from the depth reading to compensate for the location of the transducer. This allows the instrument to indicate the water depth relative to the bottom of the keel or the surface of the water. To set the keel/surface offset: 1. Apply power while holding down the " key. ON 2. After two seconds the display will indicate the current Deep Alarm depth setting. dAL ON ^ V OFF Press for 3 Seconds 3. Use the " and # keys to change the value. If either key is held depressed for more than one second the reading will increase or decrease rapidly. 4. When the alarm is set, exit by pressing both the " and # keys simultaneously. Alternatively, if no keys are pressed for a period of 5 seconds the normal depth display will resume. ON 8 50 ^ V OFF ^ V OFF Hold down during power up 2. When the unit is on, release the " key. The display will indicate if the current offset is keel offset or waterline offset: Hull Offset (Depth below the keel) Press simultaneously to exit Note: If the reading is increased one step above 600 feet (or equivalent) the display will show !"" and the alarm will be disabled. The alarm can also be disabled by pressing both the " and # keys for 5 seconds. The word !"" will be displayed but the alarm depth will be retained for future use. Surface Offset (Depth below the surface) 3. After 5 seconds the display will indicate the current offset. Note: A negative offset is used to display depth below the keel and a positive offset is used to display depth below the surface. 4 DS41 Owner's Manual 4. Use the " and # keys to change the value. If either key is held depressed for more than one second the reading will increase or decrease rapidly. 5. The offset can be programmed in 0.1 unit steps from -9.9!9.9 feet (or equivalent). When programmed for a negative offset, `-' will be indicated on the left hand side of the display. 6. To display depth below the keel enter the vertical distance between the bottom of the keel and the depth trasnducer as a negative value. 7. To display depth below surface enter the vertical distance from the waterline to the depth transducer as a positive number (no negative sign). 8. To exit this mode, press and hold both the " and # keys simultaneously. Alternatively, if no keys are pressed for a period of 5 seconds normal depth display will resume. ON 2. The display will show tdr. 3. Release the key. 4. After 2 seconds the display will show the Transducer Setting value eg 0.0 5. Use the " and # keys to change the value. 6. To exit this mode, press and hold both the " and # keys simultaneously. tdr Units of Measure To select the displayed unit 1. Apply power while holding down the # key. ON ^ V OFF ^ V OFF Press simultaneously Hold down during power up The display will now indicate the current water depth. 2. When the unit is on, release the # key. The display will indicate the current display unit with: Transducer Setting A Transducer Setting is provided to allow the D41 to be used with different transducer types. The default setting (=0.0) is used for most transducers. Some transducers `ring' after the sonar transmit pulse (just like hitting a bell). This ringing can be interpreted as an echo from a shallow bottom. The setting is used to increase the required level that shallow echoes must meet before they will be displayed. If the D41 gives repeated false readings of 1.5 to 3 feet depth while in deep water the transducer setting should be increased. Adjust it upward by 0.5 at a time and retest. The range of values is -0.9 to +2.5. If the value is set too high it could cause erratic readings in shallow water. Changing the Transducer Setting 1. Apply power while holding down the "ON key. The display will show either HOF or SOF for 7 seconds. Continue to hold the key down. 8 Ft 8 88 8 FA Feet Meters Fathoms ON 3. Use the " and # keys to change the value. 4. To exit this mode, press and hold both the " and # keys simultaneously. Alternatively, if no keys are pressed for a period of 5 seconds normal depth display will resume. ^ V OFF Press simultaneously The display will now indicate the current water depth in the selected display unit. DS41 Owner's Manual 5 Troubleshooting No display: 1. Check DC power connections and DC polarity with voltmeter. 2. Check fuse. No depth reading (## at all depths: ##) ## 1. Check transducer for growth or multiple coats of paint. 2. Check the transducer cable for cuts and sharp bends. 3. Check that the transducer connection behind the D41is firm and free of corrosion. Erratic readings while moored: Check transducer for growth or multiple coats of paint. Erratic readings while moving: Cavitation (air) under the face of the transducer. Review installation and reinstall if necessary. Erratic readings only while engine is running: 1. Re-route power and transducer cables away from engine, ignition wires and battery cables. 2. Add feed-through filter capacitor on the positive terminal of the ignition coil. 3. Add an alternator whine filter to alternator. 4. Replace spark plug wire with resistive type. 6 DS41 Owner's Manual What comes with your Digital Depth Sounder Standard Mounting Bracket ................................................................. With mounting hardware Extension Power Cord ......................... 6 feet long with quick-disconnect connectors Twist Lock Face Plate .......................................... ...