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 ...............................................................................................
Specifications • Size • Operating Voltage Mount 2" (51mm) diameter hole Depth behind face plate 3.75" (95mm) max. Display 3-character LCD • Color • Operating Temperature 0°C to 50°C (32°F to 122°F). • Current Drain Black with texture on bezel. 150mA max, including internal buzzer. • Backlighting Red colored diffused lighting for display. • Water Integrity Front will withstand direct water spray. • Depth/Alarm Range 2.0!600 0.6!184 0.3!100 (to 9.9 in 9.5 VDC to 16.5 VDC.
Operation Note: 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. The arrow will flash if alarms are turned ON but the shallow alarm is individually set to OFF. See next section.
Instrument Setup Deep Alarm Keel/Surface Offset To set the deep alarm: 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. 1. Press the # key for three seconds. The display will show: dAL ^ ON OFF V Press for 3 Seconds 2. After two seconds the display will indicate the current Deep Alarm depth setting.
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.
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.
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 ........................................................................................
2.75" 2.125" 13° DTS53 DTS55 Bronze Low Profile Transducer In-Hull Transducer Note: All transducers come with 30 feet of cable. Replacement Parts The following parts may be ordered from the Parts Department. To order, call Toll-free Number: 1-800-487-2788. Square Face Plate ............................................................ Part Number 568001012A Round Face Plate ............................................................. Part Number 568002012A Gasket ....................................
Installation • Location should provide as much protection from the elements as possible. a) Attach the face plate to the front panel of the instrument. • The panel for mounting the instrument should be 1/8 to 3/4 inch thick. b) Twist the face plate clockwise until tight. • The space behind the instrument panel must have a depth of at least 3.75 inches. See Figure 1 for dimensions of the instrument. Face Plate Installation 1. To install a face plate: 2.
6. Connect the power cord at the back of the instrument to a 12 V power supply which is active whenever the ignition switch is on. The red lead should be connected to the positive terminal of the power supply via a 1 amp fuse or a 1 amp circuit breaker. The black lead should be connected to the negative terminal. 7. Obtain the power from a 12 V source as directly as possible. Avoid power circuits which share loads with ignition, alternators, radio transmitters, etc.
Transducer Installation Note: The installation of a transducer is a job for a professional boat yard that performs numerous installations. The following is an informational guideline on the installation of transducers. • Do not expose a plastic thru-hull transducer to solvents. Strong solvents such as acetone and methylene chloride attack many types of plastics and dramatically reduce the strength of plastic parts.
Sailboats transducer is not shaded by the prop shaft(s). On sailboats, the transducer should be mounted where the acoustic beam will not be shaded by the keel. A spot forward of the keel is usually best. Try to find an accessible spot with a minimum deadrise angle. See Figure 4. On displacement hull powerboats (such as trawlers), the transducer should be mounted amidships, relatively close to the keel (centerline of the hull).
Transom Installation In-Hull Installation On transom installation, mount your transducer as close to the centerline (keel) of the boat as possible. On slower, heavier displacement boats, positioning the transducer farther from the keel is acceptable. Transducer installation inside a solid fiberglass hull may degrade performance of depth sounder. Therefore, this type of installation is not preferred over thru-hull and transom installations.
Appendix A – Dual Station Operation Multiple DS41 instruments can be installed on a single vessel. These instruments can be connected together and configured to operate in a dual station configuration. One instrument is designated as a master and all other instruments, connected to it, are configured as slaves. The master device is connected to the depth transducer and determines the water depth. This information is then displayed on all slave devices connected to it.
Linked or Separate Selection By default a dual station pair of DS41 instruments automatically keep the following settings the same in both instruments: 4. Continue to hold the # key until the display indicates the current linked/ separate selection. Alarms On/Off Alarm Values (Deep and Shallow) Keel Offset (see note) Units of measure (see note) Linked Example: Switching an alarm off on the slave instrument will also switch the alarm off on the master instrument.
Appendix B – NMEA Repeater Mode The DS41 can be configured to operate as a NMEA repeater. In this mode it will display depth information from any depth sounder outputing DPT or DBT NMEA depth data (no other NMEA depth sentences are supported). Notes: To set the DS41 to repeater mode: 1. Connect the NMEA data and DC power as shown in the following diagram. 2. Apply power to the instrument and configure it for slave operation as described in the Instrument Setup section (Dual Station Operation).