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Pub. 988-0064-351
LST-3800
In-Dash Digital Sonar Gauge
Installation & Operation Instructions
The LST-3800 is a depth and temperature gauge that comes with a 200
kHz transducer, features deep and shallow alarms and has three main
page displays. It can show depth in Meters or Feet, temperature in Fahr-
enheit or Celsius and its display may be set to rotate between Tempera-
ture, Depth or Dual display pages. The unit fits in a standard 2-1/8" (54
mm) hole used by most marine equipment manufacturers
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4-1/8" Dash (105 mm) Gasket 2-1/2" (64 mm) Cables Threaded mounting collar Dash installation, cross-section view. Caution: You should read over the entire installation section before drilling any holes in your vessel! You can install this gauge in some other order if you prefer, but we rec- ommend the installation sequence summarized below: 1. Determine the location for the gauge so you can plan how and where to route the cables. This will help you make sure you have enough cable length for the
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Recommended Tools and Supplies Supplies are not included, unless otherwise indicated. If the dash does not have a standard 2-1/8" (54 mm) hole, you will need a drill or saw to make the hole. Carefully measure the dash thickness and the hole area before cutting or drilling. The buzzer installation requires two cable ties. If you need to extend any of the wires, use a minimum of 24-gauge wire and wire connectors of your choice. Wire nuts or electrical tape are re- quired to cap any unused bare wir
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Buzzer red wire LST black wire to to boat power buzzer black wire Buzzer LST 3800 housing Red wire and fuse Red to dash light switch Black wire Power/transducer cable 12 volt battery Transducer LST-3800 cable connections. In the configuration above, the unit is always on. It will draw 11 milli- amps of current with the backlight off and 40 milliamps with the back- light on full brightness. Typically, the maximum recommended current load on a boat in storage is about 50 milliamps. A battery will
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Caution: The bare ends on any unused wires could cause an electrical short if left exposed. To prevent this, you should cover the individual wire ends — either by capping them with wire nuts or wrapping them with electrical tape. You should cut off the bare wire before taping off the ends. After connecting the power wires to the battery or switch, connect the power/transducer cable to the gauge's power cable (above). The unit won't be harmed if the power wires are connected backwards, but it won
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Timeout There is no exit key in the LST 3800. The menus "time out" instead. That means they automatically close after a preset amount of time. When you install the gauge, the default timeout duration is 5 seconds. You can modify the TIMEOUT setting by pressing MENU and using the up and down keys to scroll through the main menu. When TIMEOUT appears in the cen- ter square — like the illustration below — press MENU. That will open the Timeout Menu, which has four settings: 3, 5, 7 and 10 seconds.
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Depth Page The Depth Page displays water depth readings taken by the 200 kHz transducer packed with the LST-3800. For transducer installation instructions, see Installation Instructions for Skimmer Transducers, part number, 988-0147-582. Temperature Page The Temperature Page monitors surface water temperature via a tem- perature sensor built into your 200 kHz transducer. Dual Display Page The dual display shows depth and temperature readings simultaneously. Autoscroll If you would like page disp
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Backlight Once in the Backlight menu, use the UP and DOWN keys to select one of five brightness levels, OFF, 25%, 50%, 75% or MAX. If the unit's dash light wires are connected, the backlight will come on when with the rest of the dash lights are turned on. See wiring options on pages 4. To control the backlight manually, check or uncheck the MANUAL box by pressing MENU in the Backlight internal menu. Use the UP key to in- crease the brightness level. The brightness level may be lowered or turned
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alarm menu into the center square. Press MENU to access the alarm menu, then use the UP and DOWN keys to set the alarm to the desired depth. Set Units The Set Units menu allows you to switch the units of measure for tem- perature and depth from FEET and FAHRENHEIT (°F) to METERS and CELSIUS (°C). Timeout You can modify the amount of time a menu will be displayed by accessing the Timeout menu. See detailed entry on page 6. System The System menu displays the gauge's software information. 9
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Notes 10
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LOWRANCE ELECTRONICS FULL ONE-YEAR WARRANTY "We," "our," or "us" refers to LOWRANCE ELECTRONICS, INC., the manufacturer of this product. "You" or "your" refers to the first person who purchases this product as a consumer item for personal, family or household use. We warrant this product against defects or malfunctions in materials and workmanship, and against failure to conform to this product's written specifications, all for one (1) year from the date of original purchase by you. WE MAKE NO O
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How to Obtain Service… …in the USA: Contact the Factory Customer Service Department. Call toll-free: 800-324-1356. 8 a.m. to 5 p.m. Central Standard Time, M-F Lowrance Electronics may find it necessary to change or end our shipping policies, regu- lations and special offers at any time. We reserve the right to do so without notice. …in Canada: Contact the Factory Customer Service Department. Call toll-free: 800-661-3983 905-629-1614 (not toll-free) 8 a.m. to 5 p.m. Eastern Standard Time, M-F …ou
