La Crosse Technology WT-5431 User manual

WT-5431
433 MHz
Radio Controlled Projection Alarm
Instruction Manual

2
TABLE OF CONTENTS
Topic Page
Inventory of Contents/ Additional Equipment 3
About WWVB 3
Quick Set-Up Guide 4
Detailed Set-Up Guide
Battery Installation 5-6
Program Mode
Programming Sequence 6
Function Buttons 6
Time Zone Setting 6-7
DST (Daylight Saving Time) Setting 7
Adjustable Snooze 7
Time Setting 7-8
Date Setting 8
12/24-Hour Setting/Selecting °F or °C 8
Features & Operations
Features 9
Radio-Controlled Time 9
Projection 10
EL Backlight 10
Indoor Temperature 10-11
Remote Temperature 11
Time Alarm 11-12
Changing Display Mode (viewing seconds) 12
Mounting 13
Maintenance & Care 13
Troubleshooting 15
Specifications 16
Warranty and Contact Information 17

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INVENTORY OF CONTENTS
1) WT-5431 Alarm Clock
2) TX6U Remote temperature sensor
3) AC adapter/transformer (6V)
4) Instruction manual and warranty card.
ADDITIONAL EQUIPMENT (not included)
1) Three fresh 1.5V AA batteries (optional for alarm clock)
2) Two fresh 1.5V AA batteries (for remote sensor)
FEATURES OF PROJECTION ALARM
Operation of these features is in section III.
1. Radio-controlled time and date
2. Projection of time and/or remote temperature
3. EL backlight
4. Six modes of date/seconds/temperature display
5. Indoor temperature
6. Remote outdoor temperature
7. Dual alarms
8. Adjustable snooze
ABOUT WWVB (Radio Controlled Time)
The NIST (National Institute of Standards and Technology—Time and Frequency
Division) WWVB radio station is located in Ft. Collins, Colorado, and transmits the exact
time signal continuously throughout the United States at 60 kHz. The signal can be
received up to 2,000 miles away through the internal antenna in the projection alarm.
However, due to the nature of the Earth’s Ionosphere, reception is very limited during
daylight hours. The projection alarm will search for a signal every night when reception
is best.
The WWVB radio station receives the time data from the NIST Atomic clock in Boulder,
Colorado. A team of atomic physicists is continually measuring every second, of every
day, to an accuracy of ten billionths of a second per day. These physicists have created
an international standard, measuring a second as 9,192,631,770 vibrations of a Cesium-
133 atom in a vacuum. For more detail, visit http://www.boulder.nist.gov/timefreq.htm.
To listen to the NIST time, call [phone]. This number will connect you to an
automated time, announced at the top of the minute in “Coordinated Universal Time”,
which is also known as Greenwich Mean Time (GMT). This time does not follow
Daylight Saving Time changes. After the top of the minute, a tone will sound for every
second. It is possible that your projection alarm may not be exactly on the second due to
the variance in the quartz. However, the clock will adjust the quartz timing over the
course of several days to be very accurate; under 0.10 seconds per day.

4
QUICK SET-UP GUIDE
Hint: Use good quality Alkaline Batteries and avoid rechargeable batteries.
1. Have the indoor station and outdoor remote 3 to 5 apart.
2. Batteries should be out of both units for 10 minutes.
3. Place the batteries into the outdoor remote first then into the indoor station.
(All outdoor remotes must be started before the indoor station)
4. DO NOT PRESS ANY BUTTONS FOR 10 MINUTES.
In this time the display and sensor will start to talk to each other and the display will
show both the indoor temperature and an outdoor temperature. If the station does not
display both temperatures after the 10 minutes please retry the set up as stated above.
After both indoor and outdoor temperatures are displayed for 10 minutes you can place
your sensor outdoors and set your time.
The remote sensor should be placed in a dry, shaded area. The remote sensor has a range
of 80 feet. Any walls that the signal will have to pass through will reduce distance. An
outdoor wall or window will have 20 to 30 feet of resistance and an interior wall will
have 10 to 20 feet of resistance. Your distance plus resistance should not exceed 80 ft. in
a straight line.
NOTE: Fog and mist will not harm your remote sensor but direct rain must be avoided.
To complete the set up of your temperature station after the 10 minutes have passed
please follow the steps on page 7.

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B
attery
Cover
DETAILED SET-UP GUIDE
Important: Insert batteries into the sensor first, then into the alarm clock. Do not
press any buttons until remote temperature is displayed.
II. BATTERY INSTALLATION
A. REMOTE TEMPERATURE SENSOR
1. Remove the battery cover. Observing the correct
polarity, install 2 AA batteries. The batteries will
fit tightly (to avoid start-up problems make sure
that they do not spring free during installation).
2. Replace the battery cover.
B. PROJECTION ALARM
1. Remove the battery cover.
2. Observe the correct polarity,
and install 3 AA batteries.
3. In addition or instead of
inserting batteries, the AC
adapter can be used. Simply
plug the adapter into the
receptacle on the underneath of the alarm clock and then plug in adapter.
4. Replace the battery cover.
5. The projector will activate and remain on if the alarm clock is plugged in. If
only batteries are used, the projector will only be activated when a button is
pressed. The projection is a red light, not harmful under normal usage,
although care should be taken to not look directly into the light.
Note: After the batteries have been installed a tone will sound, and the LCD
(Liquid Crystal Display) will activate. The indoor temperature and the
remote temperature will be displayed (within three minutes). Also, the time
will appear as “-:--”. The WWVB search is automatically initiated, and a
tower icon appears and flashes with the time colon (no tower icon will
appear if the WWVB is too weak to be detected, and the time display will
remain on “-:--”). While the WWVB search is being conducted various
numbers will appear in the time display. After 10 minutes, the projection
alarm will either display the WWVB time, or discontinue the search if the
time is not found. If the search is cancelled “-:--” will remain in the time
LCD. The projection alarm will conduct a WWVB search every hour until
the first signal is found. Once the WWVB time is found, a search is
automatically conducted nightly at midnight. If the signal is found at
midnight, the tower icon will remain, if not, another search will take place
every hour (until 6:00 am) until the signal is found successfully. If no signal

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is found during this period, the tower icon will not appear and the clock will
search again at 12:00 am the next night.
6. Either wait for the WWVB reception or manually set the time and date,
making sure to set the correct time zone.
III. PROGRAM MODE
To enter the Program Mode hold down the “SET” button for 1 second, until the time
zone (“-5” default) flashes in the lower left. Press the “SNOOZE” button at any
time to exit the Program Mode, or wait approximately 15 seconds for the projection
alarm to automatically return to normal operation.
A. PROGRAMMING SEQUENCE
1. Time Zone Setting
2. Daylight Saving Time ON/OFF
3. Adjustable Snooze
4. Hour Setting
5. Minute Setting
6. Year Setting
7. Month Setting
8. Date Setting
9. Day Setting
10. 12/24-hour Mode
B. FUNCTION BUTTONS
There are 7 function buttons located on the front of the projection alarm and one
on the top. The function buttons are labeled: ALM1/HOUR, ALM2/MIN, light
intensity icon, DISPL, light direction icon, SET, MODE/+, and SNOOZE (the
top bar).
C. TIME ZONE SETTING
1. Hold down the “SET” button for 1 second, the time zone (“-5” default) will
flash in the Date LCD.
2. Press and release the “+” button to select the appropriate time zone. There
are 13 time zones to choose from (based relative to the international time
standard of GMT (“Greenwich Mean Time).

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3. From –5h to –8h, a US map with the highlighted time zone will also be
displayed to the right of the time display.
4. Press and release the “SET” button to confirm the time zone setting, and to
advance to DST (Daylight saving time) setting.
D. DST (DAYLIGHT SAVING TIME) SETTING
Note: The DST default is “On”, meaning that the WWVB will automatically
change the time according to Daylight Saving Time in the spring and fall. For
areas that do not recognize DST changes (Arizona and parts of Indiana) turn
the DST “OFF”.
1. Press and release the “+” button to turn the DST off, as will be indicated by
the display of “OFF” in the time LCD.
2. Press and release the “SET” button to confirm the DST setting, and to
advance to select the length of the snooze.
E. ADJUSTABLE SNOOZE TIME
Note: The snooze length can be adjusted from 1 minute to 59 minutes. This
duration refers to the length of time the alarm will be disabled when the
“SNOOZE” bar is pressed. If set to “0”, activating the snooze will turn off the
alarm for 24 hours.
1. Press and release the “+” button to advance the snooze time from 0 (off ) to
59 minutes.
2. Press and release the “SET” button to confirm the snooze setting, and to
advance to manually set the time.
F. TIME SETTING
Note: When the WWVB signal is found, that time will over-ride the manually set
time.
1. Press and release the “+” button to select the hour. Note: when setting the
hour, “PM” will appear to the left of the hour display, if it is AM nothing
will be displayed.
-4h Atlantic Time
-5h Eastern Time (default setting)
-6h Central Time
-7h Mountain Time
-8h Pacific Time
-9h Alaskan Time
-10h Hawaiian Time
-11h, -12h Next two time zones West of HAW
0h Greenwich Mean Time
-1h, -2h, -3h Three time zones West of GMT

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2. Press and release the “SET” button to confirm the hour setting, and to shift
to select the minutes.
3. Press and release the “+” button to select the minutes.
4. Press and release the “SET” button to confirm the time setting, and to
advance to manually set the date.
G. DATE SETTING
Note: When the WWVB signal is found, that date will over-ride the manually set
date.
1. Press and release the “+” button to select the year.
2. Press and release the “SET” button to confirm the year, and to set the
month.
3. The month will flash. Press and release the “+” button to select the
appropriate month.
4. Press and release the “SET” button to confirm the month, and to set the
date.
5. The date will flash. Press and release the “+” button to select the
appropriate date.
6. Press and release the “SET” button to confirm the date, and to set the
weekday.
7. The weekday will flash. Press and release the “+” button to select the
appropriate weekday.
8. Press and release the “SET” button to confirm the calendar settings, and to
advance to select either 12 or 24-hour time display.
H. 12/24-HOUR SETTING/ SELECTING °F OR °C
Note: Setting to the 24 hour mode (also known as Military Time) will also
change the temperature to display in
° C instead of ° F.
1. Press and release the “+” button to toggle between 12 and 24 hour time.
2. Press release the “SET” button to confirm the 12/24-hour time display, and
to return to normal operation.

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IV. FEATURES & OPERATIONS
A. FEATURES
1. Radio-controlled time and date
2. Projection of time and/or remote temperature
3. EL backlight
4. Six modes of date/seconds/temperature display
5. Indoor temperature
6. Remote outdoor temperature
7. Dual alarms
8. Adjustable snooze
B. RADIO-CONTROLLED TIME AND DATE
1. The projection alarm will automatically search for the time signal upon
initial set-up and every night.
2. When the signal is being received, there will be a “tower” icon flashing to
the left of the time display.
3. When the time signal has been received successfully, the tower icon will
remain steady until midnight.
4. The NIST (National Institute of Standards and Technology—Time and
Frequency Division) WWVB radio station is located in Ft. Collins,
Colorado, and transmits the exact time signal continuously throughout the
United States at 60 kHz. The signal can be received up to 2,000 miles away
through the internal antenna in the projection alarm.
5. Due to the nature of the Earth’s Ionosphere, reception is very limited during
daylight hours. The projection alarm will search for a signal every night
when reception is best.
6. The WWVB radio station receives the time data from the NIST Atomic
clock in Boulder, Colorado. A team of atomic physicists is continually
measuring every second, of every day, to an accuracy of ten billionths of a
second per day. These physicists have created an international standard,
measuring a second as 9,192,631,770 vibrations of a Cesium-133 atom in a
vacuum.
7. For more detail, visit http://www.boulder.nist.gov/timefreq.htm. To listen to
the NIST time, call [phone]. This number will connect you to an
automated time, announced at the top of the minute in “Coordinated
Universal Time”, which is also known as Greenwich Mean Time (GMT).
This time does not follow Daylight Saving Time changes. After the top of
the minute, a tone will sound for every second.
8. It is possible that your projection alarm may not be exactly on the second
due to the variance in the quartz. However, the clock will adjust the quartz
timing over the course of several days to be very accurate; under 0.10
seconds per day.

10
C. PROJECTION OF TIME AND/OR REMOTE TEMPERATURE
1. When plugged into an AC outlet, the projection alarm can continuously
project the time and/or remote temperature.
2. When operating on batteries alone, the projection alarm will only project
when a button is pressed.
3. The projection will auto-focus for display from three to six feet away. A
dark surrounding will be necessary to clearly see the projection.
4. The default is projecting time (Hour and Minutes). The projection alarm
can be se to project the time (M0), remote temperature (M1), or alternating
between time and remote temperature (M2) by pressing the “DISPL”
button. The selected display mode will flash on the lower left as “M0”,
“M1” or “M2”.
5. The direction of the display can also be rotated 360°in 90°increments by
pressing the directional button. There is no display on the LCD that
signifies the direction.
6. The projector case can be rotated 180°to further help orient the projected
display.
7. The intensity of the projection can be adjusted to three different settings as
well as turned “off” by pressing the light Intensity button. When turned off,
the projection will only come on when a button is pressed. The intensity
cannot be set for the projected display when set to “off”. When only
batteries are used, the intensity setting is set to “off” with no other options.
D. EL BACKLIGHT
1. The projection alarm has an EL backlight designed for night-viewing. This
will light up for 2 seconds whenever a button is pressed.
2. The EL backlight cannot be turned on constantly; this would drain the
batteries and burn out the EL.
E. INDOOR TEMPERATURE
1. The projection alarm measures indoor temperature with an internal sensor.
2. This temperature is displayed in °F or °C, depending on the time format (12
or 24 hour mode). When in 12-hour format, the temperature will be in °F.
When in 24-hour mode, the temperature will be in °C.
3. The indoor temperature will take time to adjust to the surrounding
temperature as the sensor is inside the case.
4. If the remote temperature is placed next to the projection alarm, more often
than not the temperature will not be exact with one another. This is not a
Light intensity Display Mode Display Direction