La Crosse Technology WT-5720TWC User manual

WT-5720TWC
433 MHz
Radio Controlled Projection Alarm
Instruction Manual
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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
Program Mode
Programming Sequence 6
Function Buttons 6
Time Zone Setting 6-7
DST (Daylight Saving Time) Setting 7
Adjustable Snooze 7-8
Time Setting 8
Date Setting 8
12/24-Hour Setting 9
Selecting °F or °C 9
Features & Operations
Features 10
Radio-Controlled Time 10
Projection 11
LCD light 11
Indoor Temperature 11
Time Alarm 12
Changing Display Mode (viewing seconds) 13
Maintenance & Care 14
Troubleshooting 15
Specifications 16
Warranty and Contact Information 17-18

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INVENTORY OF CONTENTS
1) WT-5720 projection alarm
2) AC adapter/transformer
3) Instruction manual and warranty card.
ADDITIONAL EQUIPMENT (not included)
1) Two fresh 1.5V AA batteries (optional for projection alarm)
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 derives its signal 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 information about WWVB please see the NIST
website at http://www.boulder.nist.gov/timefreq/stations/wwvb.htm

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QUICK SET-UP GUIDE
1) Insert two AA batteries into the projection alarm and/or plug into wall.
Note: Do not press any buttons until the WWVB time signal is received or
reception errors may occur.
2) Wait 10 minutes for WWVB reception.
3) If there is no WWVB reception manually set the time and date (instructions
in the Program Mode).
4) Program the settings.
5) Mount the WT-5720 in a suitable location, where WWVB signal can be
received.
6) 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.
7) See the “Features” section III for instructions on projection direction, etc.

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I.
DETAILED SET-UP GUIDE
BATTERY INSTALLATION
A. Projection Alarm
1. Remove the battery cover.
2. Observe the correct polarity, and install 2 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 U.S.
map will be displayed and 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 appear. If not, another
search will take place every hour (until 6:00 am) until the signal is received
successfully. If no signal is found during this period, the tower icon will not
appear and the clock will search again at 12:00 am the next night.
AC adapter
receptacle

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II. 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 right. The program mode guide is laid out in
a manner that allows you to program each function separately, or you can follow the
instructions entirely to program the projection alarm. Complete programming is
usually done for the initial set-up, and will require you to skip to step 4 of
programming sections “D” through “H”. Press and release 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 6 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, light
direction icon, “SET”, “MODE/+”,
and “SNOOZE” (the top bar).
C. Time Zone Setting
1. Hold down the “SET” button for 1 second.
2. The default (factory set) time zone (“-5”) will flash in the Date LCD.
3. Press and release the “+” button to select the appropriate time zone.
4. There are 13 time zones to choose from, based relative to the international
time standard of GMT (“Greenwich Mean Time).
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5. From –5h to –8h a US map with the highlighted time zone will also be
displayed to the right of the time display.
-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
6. 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. Hold down the “SET” button for 1 second.
2. The selected time zone will flash.
3. Press and release the “SET” button once more until “On” flashes in the
lower right and “DST” flashes in the upper right.
4. Press and release the “+” button to turn the DST off, as will be indicated by
the display of “OFF” in the time LCD.
5. 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. Hold down the “SET” button for 1 second.
2. The selected time zone will flash.
3. Press and release the “SET” button 2 times until “Sno” appears in the lower
right and duration (“:10” default) flashes in the time LCD.
4. Press and release the “+” button to advance the snooze time from 0 (off ) to
59 minutes.
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5. 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. Hold down the “SET” button for 1 second.
2. The selected time zone will flash).
3. Press and release the “SET” button 3 times until the hour flashes in the time
LCD.
4. 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.
5. Press and release the “SET” button to confirm the hour setting and to shift
to select the minutes.
6. Press and release the “+” button to select the minutes.
7. 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. Hold down the “SET” button for 1 second.
2. The selected time zone will flash
3. Press and release the “SET” button 5 times until the year flashes in the date
LCD.
4. Press and release the “+” button to select the year.
5. Press and release the “SET” button to confirm the year and to set the
month.
6. The month will flash.
7. Press and release the “+” button to select the appropriate month.
8. Press and release the “SET” button to confirm the month and to set the date.
9. The date will flash.
10. Press and release the “+” button to select the appropriate date.
11. Press and release the “SET” button to confirm the date and to set the
weekday.
12. The weekday will flash.
13. Press and release the “+” button to select the appropriate weekday.
14. Press and release the “SET” button to confirm the calendar settings and to
advance to select either 12 or 24-hour time display.

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H. 12/24-Hour Setting
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. Hold down the “SET” button for 1 second.
2. The selected time zone will flash.
3. Press and release the “SET” button 9 times until the “12” hour time display
flashes in the time LCD.
4. Press and release the “+” button to toggle between 12 and 24 hour time.
5. Press and release the “SET” button to confirm the 12/24-hour time display
and to return to normal operation.
I. Selecting °F or °C
The 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.

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FEATURES & OPERATIONS
A. Features
1. Radio-controlled time and date
2. Projection of time
3. LCD light
4. Six modes of date/seconds/temperature display
5. Indoor temperature
6. Remote 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
right 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.

C. Projection of Time
1. When plugged into an AC outlet, the projection alarm can continuously project
the time.
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 direction of the display can be rotated 360°in 90°increments by pressing
the directional button. There is no display on the LCD that signifies the
direction.
5. The projector case can be rotated 180°to further help orient the projected
display.
6. 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”.
7. When only batteries are used, the intensity setting is set to “off” with no other
options.
D. LCD Light
1. The projection alarm has an LCD light designed for night viewing. This will
light up for 2 seconds whenever a button is pressed.
2. The LCD light cannot be turned on constantly; this would drain the batteries and
burn out the light.
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.
Light Intensity
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Projection
Direction
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F. Time Alarm
The projection alarm has two separate alarms for time, “ALM1” and “ALM2”. The
alarms have a different sound; ALM1 increases in volume after 25 seconds, and
again after 50 seconds. ALM2 is a constant volume. The total duration is 96 seconds
for each alarm.
1. Setting the Alarm
a) Press and hold “ALM1” or “ALM2” for two seconds until the alarm time is
flashing.
b) Press and release “ALM1/HOUR” to advance the hour.
c) Press and release “ALM2/MIN” to advance the minute.
d) The time will display “PM” if set to PM, and nothing if set to AM.
e) “(((1)))” or “(((2)))” will be displayed to the right of the time when the alarm
is activated.
f) The projection alarm will revert to normal operation when no buttons are
pressed for 15 seconds.
g) The alarm is now set and activated.
2. Activating/Deactivating the Alarm
a) After entering the alarm setting mode the alarm is activated (either ALM1 or
ALM2).
Alarm 2 activated
b) To toggle between activating and
deactivating the alarm, press either the
“ALM1” or “ALM2” briefly.
c) “(((1)))” or “(((2)))” will be displayed to
the right of the time display when the
alarm is activated.
d) When the snooze bar is pressed, the
display will scroll through the Alarm 1
and Alarm 2 times in the lower right.
3. Turning Alarm Off (While Sounding)
a) While either alarm is sounding press and release the “SNOOZE” bar to
disable the alarm for the set duration (Section II. D.).
b) If the duration is set to “0” the alarm will be disabled for 24 hours.
c) After the “SNOOZE” bar is pressed the lower left will display the time
remaining on the snooze.
d) The “SNOOZE” bar may be pressed at any time to restart the snooze
duration.
e) To disable the alarm for 24 hours press any button other than “SNOOZE” or
projection keys.
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G. Changing the Display Mode (Day, Seconds, and Temperature)
There are six possible display modes to view the day, seconds, and temperature. To
change the display (starting at the default of day, date, year):
1. Press and release the “MODE/+” button.
2. The display should now show month, day, year.
3. Press and release the “MODE/+” button again.
4. The display will now show seconds.
5. Press and release the “MODE/+” button again.
6. The display will now show alarm1 time.
7. Press and release the “MODE/+” button again.
8. The display will now show alarm2 time.
9. Press and release the “MODE/+” button again.
10. The display will now show indoor temperature.
11. Press and release the “MODE/+” button again.
12. The display will now show day, month, date.

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II. MAINTENANCE & CARE
1. Extreme temperatures, vibrations, and shock should be avoided to prevent damage
to the units.
2. Clean displays and units with a soft, damp cloth. Do not use solvents or scouring
agents—they may mark and damage the displays and casings.
3. Do not submerge in water.
4. Immediately remove all low powered batteries to avoid leakage and damage.
5. Replace with new batteries only, and of recommended size.
6. Opening the casings invalidates the warranty. Do not try to repair the units.
Contact La Crosse Technology for Repairs.

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TROUBLESHOOTING
Problem: The Projection is faint
Solution: 1) Change intensity setting
2) Use AC adapter
3) Darken surroundings
4) Use fresh batteries (if AC is not used)
Problem: The LCD is faint.
Solution: Replace the batteries.
Problem: No reception of WWVB signal.
Solution: 1) It may help reception to face the front of the projection alarm
in the general direction of Ft. Collins, Colorado.
2) Wait overnight for signal.
3) Be sure the projection alarm is at least 6 feet from any
electrical devices, i.e. TV sets, computers, or other radio
controlled clocks.
4) Remove batteries for five minutes, reinsert and leave the unit
alone overnight without pressing buttons.
5) If problems persist contact La Crosse Technology.
Problem: Hour is incorrect (minute and date are correct).
Solution: Be sure correct time zone and daylight saving time are selected.
Note: For any questions not answered, contact La Crosse Technology with the contact
information found at the end of this instructional manual.

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SPECIFICATIONS FOR WT-5720
Temperature:
Measuring range: 32°F to 122°F with 0.2°F resolution (indoor)
(0°C to 50°C with 0.1°C resolution)
Checking intervals: Every 10 seconds indoor
Power source:
AC Adapter (included) Input: 120VAC/60Hz Output: DC 6V/100MA
Battery type: Station: 2 x AA, 1.5V (Alkaline) (optional)
Battery life: Approximately 12 months, depending on
projection and light use
Dimensions (L x W x H): 5.25”W x 3.75”H x 1.25”L

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WARRANTY INFORMATION
La Crosse Technology provides a 1-year warranty on this projection alarm. Contact
La Crosse Technology immediately upon discovery of any defects covered by this
warranty.
Before sending the projection alarm in for repairs, contact La Crosse Technology. The
projection alarm will be repaired or replaced with the same or similar model.
This warranty does not cover any defects resulting from improper use, unauthorized
repairs, faulty batteries, or the projection alarms inability to receive a signal due to any
source of interference.
LA CROSSE TECHNOLOGY WILL NOT ASSUME LIABILITY FOR INCIDENTAL,
CONSEQUENTIAL, PUNITIVE, OR OTHER SIMILAR DAMAGES ASSOCIATED
WITH THE OPERATION OR MALFUNCTION OF THIS PROJECTION ALARM.
THIS PRODUCT IS NOT TO BE USED FOR MEDICAL PURPOSES OR FOR
PUBLIC INFORMATION. THIS PRODUCT IS NOT A TOY. KEEP OUT OF
CHILDRENS’ REACH.
This warranty gives you specific legal rights. You may also have other rights specific to
your State. Some States do not allow the exclusion of consequential or incidental
damages; therefore the above exclusion of limitation may not apply to you.
For warranty work, technical support, or information contact:
La Crosse Technology
1116 South Oak Street
La Crescent, MN 55947
Phone: [phone]
Fax: [phone]
e-mail
[email protected]
(warranty work)
[email protected]
(information on other products)
Website
www.lacrossetechnology.com

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FCC ID: OMO-01RX (Receiver)
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO
THE FOLLOWING TWO CONDITIONS:
1. THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
2. THIS DEVICE MUST ACCEPT INTERFERENCE RECEIVED, INCLUDING INTERFERENCE
THAT MAY CAUSE UNDESIRED OPERATION.
All rights reserved. This handbook must not be reproduced in any form, even in excerpts, or duplicated or
processed using electronic, mechanical or chemical procedures without written permission of the publisher.
This handbook may contain mistakes and printing errors. The information in this handbook is regularly
checked and corrections made in the next issue. We accept no liability for technical mistakes or printing errors,
or their consequences.
All trademarks and patents are acknowledged.