Lowrance LDT-3200 User manual

1
Pub. 988-0099-071
LDT-3200
Digital Temperature Gauge
Installation & Operation Instructions
The LDT-3200 combines a temperature gauge, voltmeter and clock in one
housing. It displays the temperature in either Fahrenheit °F or Celsius
°C and may be set to rotate between four gauge displays or "pages." The
unit fits in a standard 2-1/8" (54 mm) hole used by most marine equip-
ment manufacturers.
The gauge and its temperature sensor are designed to show surface water
temperature in a transom installation, but the sensor can be installed to
monitor the temperature elsewhere, such as in a live well.
LDT-3200 temperature gauge.
Mounting Preparations
When installed, the gauge will cover an area on the dash 2-3/8" (60.3 mm)
in diameter. To mount the unit, first make sure there is at least 2-3/4"
(70 mm) from the front of the dash to any obstruction behind the dash.
The maximum usable dash thickness is 1-1/8" (28.5 mm). Also, be sure
there is room to route the power and sensor cables. The following figure
shows gauge dimensions.

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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 this installation sequence, which is 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 desired configuration.
2. Determine the location of your battery or other power connections,
along with the power cable route.
3. Determine the location for the temperature sensor and its cable route.
4. Determine the location for the alarm buzzer and its wire route.
5. If you want to turn on the gauge backlights whenever you turn on your
dashboard lights, locate your boat's dash light switch and determine how
to route the dash light wires to it.
6. Install the temp sensor, connect power wires to the battery and route
the power/sensor cable to the gauge location.
7. Install the gauge, and connect the power/sensor cable.
8. Connect the buzzer wires and install the buzzer. If desired, connect the
dash light wires to the boat's dash light switch.
2-3/4"
(70 mm)
2-3/8"
(60.3 mm)
Gasket
Threaded mounting collar
Dash
Cables

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Recommended Tools and Supplies
Supplies are not included, unless otherwise indicated. A transom mount
requires one #8 stainless steel screw (3/4" long) and a high quality, ma-
rine-grade above- or below-waterline sealant/adhesive compound. If you
want to make a pilot hole for the screw, use a drill and a 1/8" drill bit. If
you prefer the option of routing the temp sensor cable through the tran-
som (instead of over it), you will also need a 1/2" drill bit.
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.
A screwdriver is needed for mounting the temp sensor. The buzzer in-
stallation 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 wires.
Mounting
The temperature sensor can be mounted in any convenient location.
However, make sure it is placed on the transom where it will be in con-
tact with the water at all times. Make sure the location does not interfere
with the boat's trailer.
Temp sensor on transom, with cable routed through the transom.
After determining the location, use the sensor as a template and mark
the hull for the screw's pilot hole, if desired. Route the sensor and cable
over or through the transom to the mounting location. If routing through
the transom, drill a 1/2" hole to accommodate the sensor. Attach the sen-
sor to the hull with one #8 stainless steel screw, then seal the screw with
the below-waterline sealant compound.
Caution:
If you drill a hole in the transom for the cable, make sure it is lo-
cated above the waterline. After installation, be sure to seal the ca-
ble hole with the same marine grade above-or below-waterline
sealant used for the screw.

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When you determine the location for the LDT-3200, drill a 2-1/8" (54 mm)
hole in the dash or use an existing gauge hole. Slide the unit's cables
through the hole from the front side of the dash, then push the LDT-3200
housing through the hole until it is flush with the dash surface. Make
sure the gauge is aligned correctly. Next, slide the rubber gasket and
plastic mounting collar over the cables and onto the back side of the
gauge.
Insert gauge through the hole in the front side of the dash (left). Slide
the rubber gasket over the cables, followed by the plastic collar (right).
Slide the gasket forward so it is flush with the back of the dash, then
screw on the mounting collar, turning it until it is snug against the gas-
ket and the back of the dash.
Find a buzzer location that is protected from the elements, but still lets
you hear it. We recommend that you connect the buzzer wires, then use
two cable ties and attach the buzzer to one or both of the cables at the
back of the gauge. (Some dashboards are too thin to screw into.)
Finish the installation by connecting the cables as described in the fol-
lowing wiring diagrams and photos.
Wiring
The LDT-3200 operates from 10 to 15 volts DC (12-volt system). It must
be wired to a 1-amp fuse. Failure to use a fuse with this product will void
the warranty and could result in damage to the unit or your boat.

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LDT-3200 cable connections.
In the configuration above, the unit is always on. It will draw 11 milli-
amps of current with backlight off and 40 milliamps with backlight on
full brightness. Typically, the maximum recommended current load on a
boat in storage is about 50 milliamps. A battery will self discharge at a
rate of about 9 milliamps. A battery's normal discharge plus the gauge
current (lights off) amounts to approximately 20 milliamps, well below
the recommended load limit in storage.
To automatically turn on the gauge backlights when you turn on your
other dashboard lights, connect the red dash light wire to the switch con-
trolling the dash lights.
If you want to turn off the gauge when not in use, connect the red wire
from the power/sensor cable to your boat's accessory switch, or install an
optional switch between the unit and the power source. See the following
figure.
This wire configuration lets you turn off the gauge when it's not in use.
You will need to reset the clock each time you turn the gauge back on.
12 volt
battery
Dash light red
(to dash light switch)
Dash light black
(to ground)
Temp sensor
Black
wire
LDT 3200 housing
Red wire
and fuse
Power/sensor cable
Buzzer
LDT green wire to
buzzer red wire
LDT white wire to
buzzer black wire
Accessory
switch
Power/sensor cable
Black
wire Red wire
and fuse
12 volt
battery

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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 to the battery or switch, the power /temp sensor cable
interlocks with the gauge's power cable.
The unit won't be harmed if the power wires are connected backwards,
but it won't work until they're connected correctly.
Operation
The displays and settings in this digital gauge are controlled by a three-
button keypad. The buttons are Menu, Up and Down. The Menu key
takes you to the gauge's main menu, allows you to access other internal
menus and is used to modify menu options. The up and down buttons al-
low you to scroll through all menus.
LDT-3200 keypad.
Timeout
There is no exit key in the LDT 3200. The menus time out instead. That
means menus close on their own after a preset amount of time. When you
install the gauge, the default time out duration is 5 seconds. You can
modify the "TIMEOUT" setting by pressing MENU and using the up and

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down keys to scroll through the main menu. When TIMEOUT appears in the
center square — like the illustration below — press MENU. That will
open the Timeout Menu, which has four settings: 3, 5, 7 and 10 seconds.
To choose a setting, use the up and down keys and press MENU.
Timeout in the center square on the main menu (left) will take you to the
Timeout menu. All items on the main menu (except Rev Video) will func-
tion in the same way. The Timeout menu (right).
LDT 3200 Menus
The unit has 11 menus. To access a menu, press MENU and use the up
and down keys to scroll it into the center square, then press MENU.
The menus are: AutoScroll; Backlight; Contrast; Options; Pages; Rev
Video; Set Alarm; Set Time; Set Units; Timeout; and System
Pages
When you first start using the gauge it will display the Temperature
page by default. But there are three other pages: the Voltmeter page,
Dual Display page and Clock page. You can cycle through the pages
manually or set them to be displayed at various intervals with the
AutoScroll menu, discussed on page 8.
To cycle through the pages manually, press the up or down keys. The
Clock page is the only page not set for display by factory default.
Temperature Page (left) and Voltmeter Page (right).
Center
square
Timeout
internal
menu

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Dual Display Page (left) and Clock Page (right).
To modify what pages will be displayed, press MENU and use the up and
down keys until PAGES appears in the center square. Press MENU and use
the up and down keys to move through the page options. Press MENU to
check or uncheck the boxes next to the page category you want shown on
the main display. After making your selection, the menu will time out
and take you back to the main screen. Use the up and down keys to cycle
through the four page displays, which are broken down in more detail
below.
Temperature Page
The temperature sensor is mounted on the transom to monitor water
temperature.
Voltmeter Page
The voltmeter displays the voltage.
Dual Display Page
The dual display page shows the temperature and the
voltage, simultaneously.
Clock Page
The clock displays local time and is the only page category not included in
the gauge display rotation by default.
Setting the clock
Press MENU, then use the up and down keys until SET TIME appears in the
center square display, then press MENU again. Use the up and down keys
to set the hours and minutes. When you are satisfied with one setting,
press MENU to modify the other, then let the menu time out.
AutoScroll
If you would like your page displays to rotate automatically, then you
need to check out AutoScroll, the first category on the main menu.
Autoscroll allows you to not only turn on an automatic page rotation, but
gives you control over how long the duration will be before the gauge
switches to the next page. To access the AutoScroll menu, press
MENU|MENU and use the up and down keys to select the desired dura-
tion. The settings are Off, 3, 5 and 10 seconds. The default setting for

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Autoscroll is off. When you have made the desired changes, let the menu
time out.
Alarms
The Alarms menu features more options than any other menu in the LDT
3200. It has alarms for Low Temperature, High Temperature, Battery
and Time. Once in the Alarms menu, use the up and down keys to scroll
through the alarm options. Press MENU to select one of the four options.
Setting an alarm
All four alarms have an ENABLED box at the bottom of their respective
menus. To modify the Battery and Low and High Temperature alarms,
use the up and down keys to change the values. Press MENU to check the
ENABLED box, which will turn on the alarm or press menu to uncheck it,
which will turn off the alarm. When setting the Time alarm, modify the
hour and minute settings with the up and down keys. When you are sat-
isfied with one setting, press MENU to modify the other. To check ENABLED,
press MENU until the ENABLED box border is highlighted. Use the up and
down keys to check it (turn it on) or uncheck it (turn it off). When fin-
ished, let the menu time out. When the Time Alarm is enabled, a bell icon
will be displayed at the bottom of the clock page.
Setting LDT-3200 Options
The gauge gives you a trio of display options, customized in the BACKLIGHT,
CONTRAST and REV VIDEO menus. You can modify alarm settings and change
unit and clock formats in the SET ALARM, SET UNITS and OPTION menus.
Autoscroll
This menu lets you choose the intervals page displays will rotate. See
detailed entry on page 8.
Backlight
Once in the Backlight menu, use the up and down keys to select one of
four brightness levels, 25%, 50%, 75% or Max. (The backlight is designed
to come on when with the rest of the dash lights are turned on, if the
unit's dash light wires are connected. See wiring options on page 5.) To
control it manually, select Manual by pressing MENU when in the Back-
light internal menu. Use the down key to turn off the brightness level.
The Off setting will appear when Manual is checked in the Backlight
menu. In manual mode, you will be able to turn on the backlight from the
main display by holding the MENU button for three seconds. To turn it off
again, you will have to return to the Backlight menu and use the down
key to select the off setting.
NOTE:
The Off setting is also supported in the automatic Backlight configu-
ration, but you will only see it when the dash lights are off.

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Contrast
After opening the Contrast internal menu, a contrast scroll bar will ap-
pear. Use the up and down keys to change the contrast setting. Let the
menu time out to return to the main display.
Options
The Options menu allows you to return the unit to its Factory Settings,
adjust the Clock Format, and turn on or off the Key Beep setting. Once in
the internal Options menu, use the up and down keys to select the de-
sired option and press MENU. There are two options for Clock format, 12
hour and 24 hour.
NOTE:
Factory Settings will restore the unit to the default settings used
when the gauge was powered up for the first time.
Pages
In the Pages menu you can select which pages you want to see on the
main display. See the detailed entry on page 7.
Rev Video
When you press MENU after scrolling Rev Video into the center square,
you'll notice there is no internal menu. There are two colors on the dis-
play (dark numbers and gray background by default). By pressing menu,
you swap the predominance of one color for the other. So if you change
the default setting, you will alter the screen from the default, dark num-
bers with gray background scheme, to gray numbers with a dark back-
ground.
Set Alarm
The Set Alarm menu gives you access to the four LDT 3200 alarms. See
detailed entry on page 9.
Set Time
This menu allows you to set the time. See detailed entry on page 8.
Set Units
The Set Units menu gives you the option of
switching the Temperature from Fahrenheit (°F) to
Celsius (°C). See Units menu illustration on the
right.
Timeout
In the Timeout menu, you can modify the time it takes for menus to time
out. See detailed entry on 6.
System
The System menu displays the gauge's software information.

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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 OTHER EXPRESS WARRANTY
OR REPRESENTATION OF ANY KIND WHATSOEVER CONCERNING THIS PROD-
UCT. Your remedies under this warranty will be available so long as you can show in a
reasonable manner that any defect or malfunction in materials or workmanship, or any
non-conformity with the product's written specifications, occurred within one year from the
date of your original purchase, which must be substantiated by a dated sales receipt or
sales slip. Any such defect, malfunction, or non-conformity which occurs within one year
from your original purchase date will either be repaired without charge or be replaced with
a new product identical or reasonably equivalent to this product, at our option, within a
reasonable time after our receipt of the product. If such defect, malfunction, or non-
conformity remains after a reasonable number of attempts to repair by us, you may elect to
obtain without charge a replacement of the product or a refund for the product. THIS RE-
PAIR, OR REPLACEMENT OR REFUND (AS JUST DESCRIBED) IS THE EXCLUSIVE
REMEDY AVAILABLE TO YOU AGAINST US FOR ANY DEFECT, MALFUNCTION, OR
NON-CONFORMITY CONCERNING THE PRODUCT OR FOR ANY LOSS OR DAMAGE
RESULTING FROM ANY OTHER CAUSE WHATSOEVER. WE WILL NOT UNDER ANY
CIRCUMSTANCES BE LIABLE TO ANYONE FOR ANY SPECIAL, CONSEQUENTIAL,
INCIDENTAL, OR OTHER INDIRECT DAMAGE OF ANY KIND.
Some states do not allow the exclusion or limitation of incidental or consequential damages,
so the above limitations or exclusions may not apply to you.
This warranty does NOT apply in the following circumstances: (1) when the product has
been serviced or repaired by anyone other than us; (2) when the product has been con-
nected, installed, combined, altered, adjusted, or handled in a manner other than according
to the instructions furnished with the product; (3) when any serial number has been ef-
faced, altered, or removed; or (4) when any defect, problem, loss, or damage has resulted
from any accident, misuse, negligence, or carelessness, or from any failure to provide rea-
sonable and necessary maintenance in accordance with the instructions of the owner's
manual for the product.
We reserve the right to make changes or improvements in our products from time to time
without incurring the obligation to install such improvements or changes on equipment or
items previously manufactured.
This warranty gives you specific legal rights and you may also have other rights which may
vary from state to state.
REMINDER: You must retain the sales slip or sales receipt proving the date of your origi-
nal purchase in case warranty service is ever required.
LOWRANCE ELECTRONICS
12000 E. SKELLY DRIVE, TULSA, OK 74128
[phone]

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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
…outside Canada and the USA:
Contact the dealer in the country where you purchased your unit. To locate a
dealer near you, see the instructions in paragraph number 1 below.
Accessory Ordering Information
LEI Extrasis the accessory source for sonar and GPS products manufactured
by Lowrance Electronics. To order Lowrance accessories, please contact:
1) Your local marine dealer or consumer electronics store. To locate a Lowrance
dealer, visit the web site, www.lowrance.com, and look for the Dealer Locator. Or,
consult your telephone directory for listings.
2) U.S. customers: LEI Extras Inc., PO Box 129, Catoosa, OK 74015-0129
Call toll free in the U.S., 800-324-0045,8 a.m. to 5 p.m. Central Standard
Time, M-F, or visit our web site www.lei-extras.com.
3) Canadian customers: Lowrance/Eagle Canada, 919 Matheson Blvd. E. Missis-
sauga, Ontario L4W2R7 or fax [phone].
Call toll free in Canada, 800-661-3983, or dial 905 629-1614 (not toll free), 8 a.m.
to 5 p.m. Eastern Standard Time, M-F.
For Lowranceand EagleProducts
Pub. 988-0099-071 © Copyright 2005
All Rights Reserved
Printed in USA 022505 Lowrance Electronics, Inc.