La Crosse Technology WS-8115U User manual

Page 1 of 12
WS-8115U
Atomic Digital Wall Clock
with Time with Seconds, Month,
Date, Day, & IN/OUT Temperature
by La Crosse Technology®
La Crosse Technology, Ltd.
www.lacrossetechnology.com
2809 Losey Blvd. S.
La Crosse, WI 54601
Phone [phone]
Table of Contents
Table of Contents...................................................1
Congratulations ......................................................2
Features:................................................................2
Setup Information:..................................................3
The Outdoor Temperature Sensor..........................4
Positioning the Temperature Sensor:............4
To wall mount the Temperature Sensor:.......4
WWVB (Atomic Time) Radio signal:.......................4
Setup of Time and Display Options:.......................5
1. Set the Time Zone:....................................5
2. Set Daylight Saving Time ON/OFF: ..........6
3. Set Language:...........................................6
5. Set Time Manually - Minute: .....................6
6. Set Date Manually - Year:.........................6
7. Set Date Manually - Month:.......................6
8. Set Date Manually - Date:.........................6
9. Set Date Manually - Day of Week:............6
10. Set 12 or 24 Hour Time Mode:................7
11. Set Temperature Mode - °F or °C: ..........7
Daylight Saving Time..............................................7
Setting the Daily Alarms:........................................7
Page 2 of 12
About the Daily Alarms:.....................................8
Automatic Snooze function:....................................8
Online Resources...................................................8
Care and Maintenance...........................................8
Battery Replacement..............................................9
The Low Battery Icons:.................................9
Specifications .......................................................10
Power Requirements............................................10
FCC Statement.....................................................10
Warranty Information............................................11
Congratulations
You have purchased an atomic digital Atomic
Clock from La Crosse Technology®, providing the
world's most accurate time at a glance, plus
wireless outdoor temperature.
Features:
WWVB Radio Controlled Clock (Atomic Clock)
Time in 12/24 hour format
Manual time setting option
Time Zone setting: +/- 12 Hours from GMT
Daylight Saving Time(DST) On/Off
Continuous calendar up to year 2054
Date and weekday displayed and set
automatically with the time
Temperature display in °F or °C
Snooze function (10 minutes)
Indoor thermometer
Wireless Outdoor Temperature Sensor
Battery - Atomic Clock: 2 X “AA” size 1.5V (not
included)
Battery - Wireless Outdoor Temperature Sensor:
2 X “AAA” size 1.5V (not included)
This product offers: INSTANT TRANSMISSIO
N
is the state-of-
the-art new wireless transmission
technology, exclusively designed and
developed by LA CROSSE TECHNOLOGY.
INSTANT TRANSMISSION offers you an
immediate update (every 8 seconds!) of all
your outdoor data measured from the
transmitters: follow your climatic variations
in real-time!

Page 1 of 12
WS-8115U
Atomic Digital Wall Clock
with Time with Seconds, Month,
Date, Day, & IN/OUT Temperature
by La Crosse Technology®
La Crosse Technology, Ltd.
www.lacrossetechnology.com
2809 Losey Blvd. S.
La Crosse, WI 54601
Phone [phone]
Table of Contents
Table of Contents...................................................1
Congratulations ......................................................2
Features:................................................................2
Setup Information:..................................................3
The Outdoor Temperature Sensor..........................4
Positioning the Temperature Sensor:............4
To wall mount the Temperature Sensor:.......4
WWVB (Atomic Time) Radio signal:.......................4
Setup of Time and Display Options:.......................5
1. Set the Time Zone:....................................5
2. Set Daylight Saving Time ON/OFF: ..........6
3. Set Language:...........................................6
5. Set Time Manually - Minute: .....................6
6. Set Date Manually - Year:.........................6
7. Set Date Manually - Month:.......................6
8. Set Date Manually - Date:.........................6
9. Set Date Manually - Day of Week:............6
10. Set 12 or 24 Hour Time Mode:................7
11. Set Temperature Mode - °F or °C: ..........7
Daylight Saving Time..............................................7
Setting the Daily Alarms:........................................7
Page 2 of 12
About the Daily Alarms:.....................................8
Automatic Snooze function:....................................8
Online Resources...................................................8
Care and Maintenance...........................................8
Battery Replacement..............................................9
The Low Battery Icons:.................................9
Specifications .......................................................10
Power Requirements............................................10
FCC Statement.....................................................10
Warranty Information............................................11
Congratulations
You have purchased an atomic digital Atomic
Clock from La Crosse Technology®, providing the
world's most accurate time at a glance, plus
wireless outdoor temperature.
Features:
WWVB Radio Controlled Clock (Atomic Clock)
Time in 12/24 hour format
Manual time setting option
Time Zone setting: +/- 12 Hours from GMT
Daylight Saving Time(DST) On/Off
Continuous calendar up to year 2054
Date and weekday displayed and set
automatically with the time
Temperature display in °F or °C
Snooze function (10 minutes)
Indoor thermometer
Wireless Outdoor Temperature Sensor
Battery - Atomic Clock: 2 X “AA” size 1.5V (not
included)
Battery - Wireless Outdoor Temperature Sensor:
2 X “AAA” size 1.5V (not included)
This product offers: INSTANT TRANSMISSIO
N
is the state-of-
the-art new wireless transmission
technology, exclusively designed and
developed by LA CROSSE TECHNOLOGY.
INSTANT TRANSMISSION offers you an
immediate update (every 8 seconds!) of all
your outdoor data measured from the
transmitters: follow your climatic variations
in real-time!

Page 3 of 12
Low battery icons for display and sensor
Setup Information: The Temperature Sensor
uses 2 x AAA, IEC LR3, 1.5V
battery. To install and replace
the batteries, please follow
the steps that follow:
Position the Atomic
Clock and the Outdoor
Sensor five to six feet
apart with nothing
between them.
Insert batteries into the Wireless Outdoor
Temperature Sensor first - it is important that
you do not insert the batteries into the Atomic
Clock yet.
You must insert the batteries into the Atomic
Clock within 3minutes of inserting the
batteries into the Sensor.
Slide out the battery compartment lid at the
bottom of the Outdoor Sensor.
Insert the batteries into the Outdoor Sensor
first, observing the correct polarity (see
markings inside battery compartment).
Replace the battery holder on the unit.
Immediately after and within 3minutes, insert
the batteries into the Atomic Clock, observing
the correct polarity (see markings inside
battery compartment). Replace the battery
cover. The Atomic Clock uses 2 x AA batteries
( IEC LR6, 1.5V ).
The outdoor temperature and the signal
reception icon should be displayed on the
Atomic Clock. If this does not happen after 3
minutes, the batteries will need to be removed
from both units and re-inserted, following the
instructions above.
Note: In the event of changing batteries in any of
the units, all units need to be reset by following the
setting up procedures. This is because a random
security code is assigned by the Sensor at start-up
and this code must be received and stored by the
Atomic Clock in the first 3 minutes of power being
supplied to it
Note: If the signal reception is not successful on
the first frequency (915MHz) for 22 seconds, the
frequency is changed to 920MHz and the learning
is tried another 22 seconds. If still not successful
Page 4 of 12
the reception is tried for 22 seconds on 910MHz.
This will also be done for re-synchronization.
The Outdoor Temperature Sensor
Remote transmission of
outdoor temperature to
Temperature Station by
915 MHz
Shower proof casing
Wall mounting case
Mount in a sheltered
place. Avoid direct rain and sunshine.
Under the eaves of your home is an ideal
place.
Positioning the Temperature Sensor:
The Sensor is supplied with a holder that may be
attached to a wall with the two screws supplied.
The Sensor can also be positioned on a flat
surface by securing the stand to the bottom to the
Transmitter.
Note:
Before permanently fixing the Sensor wall base,
place all units in the desired locations to check that
the outdoor temperature reading is receivable. If
the signal is being received, the signal reception
icon will be displayed on the Atomic Clock. In
event that the signal is not
received, relocate the Sensor or
move it slightly as this may help the
signal reception. To ensure a good
connection, there should be a
distance of no more than 200 feet
between the final position of the
Atomic Clock and the Sensor.
To wall mount the Temperature Sensor:
1. Secure the bracket onto a desired wall using the
screws and plastic anchors.
2. Clip the remote temperature sensor onto the
bracket.
WWVB (Atomic Time) Radio signal:
The clock must receive the WWVB Radio
Signal to automatically set the time, date and
weekday.
The clock automatically starts the WWVB on
the top of the hour between the hours of 12:00
AM and 6:00 AM.
If this synchronization attempt is successful
the radio tower icon appears on the display.

Page 3 of 12
Low battery icons for display and sensor
Setup Information: The Temperature Sensor
uses 2 x AAA, IEC LR3, 1.5V
battery. To install and replace
the batteries, please follow
the steps that follow:
Position the Atomic
Clock and the Outdoor
Sensor five to six feet
apart with nothing
between them.
Insert batteries into the Wireless Outdoor
Temperature Sensor first - it is important that
you do not insert the batteries into the Atomic
Clock yet.
You must insert the batteries into the Atomic
Clock within 3minutes of inserting the
batteries into the Sensor.
Slide out the battery compartment lid at the
bottom of the Outdoor Sensor.
Insert the batteries into the Outdoor Sensor
first, observing the correct polarity (see
markings inside battery compartment).
Replace the battery holder on the unit.
Immediately after and within 3minutes, insert
the batteries into the Atomic Clock, observing
the correct polarity (see markings inside
battery compartment). Replace the battery
cover. The Atomic Clock uses 2 x AA batteries
( IEC LR6, 1.5V ).
The outdoor temperature and the signal
reception icon should be displayed on the
Atomic Clock. If this does not happen after 3
minutes, the batteries will need to be removed
from both units and re-inserted, following the
instructions above.
Note: In the event of changing batteries in any of
the units, all units need to be reset by following the
setting up procedures. This is because a random
security code is assigned by the Sensor at start-up
and this code must be received and stored by the
Atomic Clock in the first 3 minutes of power being
supplied to it
Note: If the signal reception is not successful on
the first frequency (915MHz) for 22 seconds, the
frequency is changed to 920MHz and the learning
is tried another 22 seconds. If still not successful
Page 4 of 12
the reception is tried for 22 seconds on 910MHz.
This will also be done for re-synchronization.
The Outdoor Temperature Sensor
Remote transmission of
outdoor temperature to
Temperature Station by
915 MHz
Shower proof casing
Wall mounting case
Mount in a sheltered
place. Avoid direct rain and sunshine.
Under the eaves of your home is an ideal
place.
Positioning the Temperature Sensor:
The Sensor is supplied with a holder that may be
attached to a wall with the two screws supplied.
The Sensor can also be positioned on a flat
surface by securing the stand to the bottom to the
Transmitter.
Note:
Before permanently fixing the Sensor wall base,
place all units in the desired locations to check that
the outdoor temperature reading is receivable. If
the signal is being received, the signal reception
icon will be displayed on the Atomic Clock. In
event that the signal is not
received, relocate the Sensor or
move it slightly as this may help the
signal reception. To ensure a good
connection, there should be a
distance of no more than 200 feet
between the final position of the
Atomic Clock and the Sensor.
To wall mount the Temperature Sensor:
1. Secure the bracket onto a desired wall using the
screws and plastic anchors.
2. Clip the remote temperature sensor onto the
bracket.
WWVB (Atomic Time) Radio signal:
The clock must receive the WWVB Radio
Signal to automatically set the time, date and
weekday.
The clock automatically starts the WWVB on
the top of the hour between the hours of 12:00
AM and 6:00 AM.
If this synchronization attempt is successful
the radio tower icon appears on the display.

Page 5 of 12
The radio tower icon will disappear if the
signal reception is unsuccessful.
About WWVB (Atomic Time) Radio Signal
Reception:
A continuously displayed radio tower icon
indicates that the WWVB signal was received
successfully during the last attempt. If the
clock attempts to receive the WWVB signal
and is unsuccessful, the tower icon will not be
continuously displayed on the LCD.
We recommend a minimum distance of 8 feet
(2.5 meters) to all sources of interference,
such as televisions or computer monitors
Radio reception is weaker in rooms with
concrete walls (e.g.: in cellars) and in offices.
In such environments, place the system close
to the window.
Setup of Time and Display Options:
Above: Back view of Atomic Clock showing
buttons and battery compartment.
Note: The "SET" button is used to enter SET
mode. The display will exit SET mode
automatically after 10 seconds of inactivity. If the
display exits SET mode while you are following the
setup instructions, press the "SET" button the
indicated number of times to return to the portion of
the SET mode desired.
1. Set the Time Zone:
Press the “SET” button and the Time Zone
display will flash. Use the “PLUS” button to
select the correct Time Zone setting from the
available selections below:
-1,-2,-3: Other time zones
-4: ATL - Atlantic
-5: EST - Eastern (default setting)
-6: CST - Central
-7: MST - Mountain Page 6 of 12
-8: PST - Pacific
-9: ALA - Alaska
-10,-11,-12,12,11,10,9,8,7,6,5,4,3,2,1: Other
time zones
0: - Greenwich Mean Time (GMT)
2. Set Daylight Saving Time ON/OFF:
Press the “SET” button a second time and DST
will flash. Press the "PLUS" button to toggle
Daylight Saving Time on ("On") or off ("OFF").
See "Daylight Saving Time" on page 7 for
more information.
3. Set Language:
Press the “SET” button a third time and the
Language Abbreviation will flash. Press the
"PLUS" button to switch the Language to be
displayed. The three-letter abbreviation for the
day of the week will display in the bottom of the
LCD while the setting flashes above.
US: English (default setting)
F: French (Français)
E: Spanish (Español)
d: German (Deutsch)
Note: Manual time and date settings are optional.
In most cases, the time and date will set
automatically via WWVB radio signal. If placement
for the display does not allow for WWVB reception
due to interference, you will need to set the time
and date manually.
4. Set Time Manually - Hour:
Press the “SET” button a fourth time and the
Hours digits will flash. Use the “PLUS“ button
to set the correct hour.
5. Set Time Manually - Minute:
Press the “SET” button a fifth time and the
Minutes digits will flash. Use the “PLUS“ button
to set the correct minute.
6. Set Date Manually - Year:
Press the “SET” button a sixth time and the
Year digits will flash. Use the “PLUS“ button to
set the correct year.
7. Set Date Manually - Month:
Press the “SET” button a seventh time and the
Month digits will flash. Use the “PLUS“ button
to set the correct month.
8. Set Date Manually - Date:
Press the “SET” button an eighth time and the
Date digits will flash. Use the “PLUS“ button to
set the correct date.
9. Set Date Manually - Day of Week:

Page 5 of 12
The radio tower icon will disappear if the
signal reception is unsuccessful.
About WWVB (Atomic Time) Radio Signal
Reception:
A continuously displayed radio tower icon
indicates that the WWVB signal was received
successfully during the last attempt. If the
clock attempts to receive the WWVB signal
and is unsuccessful, the tower icon will not be
continuously displayed on the LCD.
We recommend a minimum distance of 8 feet
(2.5 meters) to all sources of interference,
such as televisions or computer monitors
Radio reception is weaker in rooms with
concrete walls (e.g.: in cellars) and in offices.
In such environments, place the system close
to the window.
Setup of Time and Display Options:
Above: Back view of Atomic Clock showing
buttons and battery compartment.
Note: The "SET" button is used to enter SET
mode. The display will exit SET mode
automatically after 10 seconds of inactivity. If the
display exits SET mode while you are following the
setup instructions, press the "SET" button the
indicated number of times to return to the portion of
the SET mode desired.
1. Set the Time Zone:
Press the “SET” button and the Time Zone
display will flash. Use the “PLUS” button to
select the correct Time Zone setting from the
available selections below:
-1,-2,-3: Other time zones
-4: ATL - Atlantic
-5: EST - Eastern (default setting)
-6: CST - Central
-7: MST - Mountain Page 6 of 12
-8: PST - Pacific
-9: ALA - Alaska
-10,-11,-12,12,11,10,9,8,7,6,5,4,3,2,1: Other
time zones
0: - Greenwich Mean Time (GMT)
2. Set Daylight Saving Time ON/OFF:
Press the “SET” button a second time and DST
will flash. Press the "PLUS" button to toggle
Daylight Saving Time on ("On") or off ("OFF").
See "Daylight Saving Time" on page 7 for
more information.
3. Set Language:
Press the “SET” button a third time and the
Language Abbreviation will flash. Press the
"PLUS" button to switch the Language to be
displayed. The three-letter abbreviation for the
day of the week will display in the bottom of the
LCD while the setting flashes above.
US: English (default setting)
F: French (Français)
E: Spanish (Español)
d: German (Deutsch)
Note: Manual time and date settings are optional.
In most cases, the time and date will set
automatically via WWVB radio signal. If placement
for the display does not allow for WWVB reception
due to interference, you will need to set the time
and date manually.
4. Set Time Manually - Hour:
Press the “SET” button a fourth time and the
Hours digits will flash. Use the “PLUS“ button
to set the correct hour.
5. Set Time Manually - Minute:
Press the “SET” button a fifth time and the
Minutes digits will flash. Use the “PLUS“ button
to set the correct minute.
6. Set Date Manually - Year:
Press the “SET” button a sixth time and the
Year digits will flash. Use the “PLUS“ button to
set the correct year.
7. Set Date Manually - Month:
Press the “SET” button a seventh time and the
Month digits will flash. Use the “PLUS“ button
to set the correct month.
8. Set Date Manually - Date:
Press the “SET” button an eighth time and the
Date digits will flash. Use the “PLUS“ button to
set the correct date.
9. Set Date Manually - Day of Week:

Page 7 of 12
Press the “SET” button a ninth time and the
Day of Week abbreviation will flash. Use the
“PLUS“ button to set the correct day of week.
10. Set 12 or 24 Hour Time Mode:
Press the “SET” button a tenth time and the 12
or 24 Hour Time Mode digits will flash. Use
the “PLUS“ button to set the time mode to
either a 12 or 24 hour clock.
11. Set Temperature Mode - °F or °C:
Press the “SET” button an eleventh time and
the Temperature Mode abbreviation will flash.
Use the “PLUS“ button to set the temperature
mode to °F or °C.
Daylight Saving Time
The National Institute of Standards and
Technology and WWVB encode a special DST
“bit” in the WWVB transmission for DST.
Your La Crosse Technology® clock will read
this information (only if "DST" is set to "On")
and automatically advance the time one hour
in the spring and back an hour in the fall.
Arizona and Indiana: If you live in an area that
does not recognize DST you must de-activate
Daylight Saving Time by setting "DST" to
"OFF"
See "Set Daylight Saving Time ON/OFF" on
page 6 for instructions.
Setting the Daily Alarms:
To turn the alarm on:
Press the "ALARM" button. The LCD will
display the alarm icon .
To set the Alarm Time - Hour: Press and
hold down the "ALARM" button for 2 seconds
until the hours digits flash. Use the “PLUS”
button to set the hour. Press the "ALARM"
button to confirm your setting and move to
setting the minutes.
To set the Alarm Time - Minutes: The
Minutes digits of the Alarm Time will flash. Use
the “PLUS” button to set the minutes. You can
hold the "PLUS" button in to speed up the
setting of minutes by using five minute
increments. Press the "ALARM" button to
confirm your minutes setting and to end the
setting procedure.
To activate or deactivate the daily alarms,
briefly press the “ALARM” button once. When
the alarm is active the clock displays the alarm
Page 8 of 12
icon below the word "ALARM". When
deactivated, the alarm icon does not
display.
About the Daily Alarms:
After 30 seconds without pressing any button
the clock switches automatically from alarm
setting mode to normal clock mode.
The alarm will sound for 85 seconds if not
deactivated. You can deactivate it by pressing
any button. The alarm will be repeated
automatically after 24 hours.
The alarm uses 3 different patterns of tone,
beginning gently and increasing in intensity,
known as a "Crescendo Alarm". The effect is
to provide increasing levels of alarm to ensure
waking while providing a gentle alarm to
lighter sleepers.
Automatic Snooze function:
While the alarm is sounding, press the
"SNOOZE" button to activate the snooze
function. The alarm icon flashes on the
display until the alarm sounds again when the
Snooze period is over (10 minutes).
Pressing the "SNOOZE" button moves the
alarm back by 10 minutes and the alarm will
restart at this time.
The Snooze function can be interrupted by
pressing any button.
Online Resources
Visit the WS-8115U page online at:
http://www.lacrossetechnology.com/8115
Care and Maintenance
Extreme temperatures, vibration and shock
should be avoided as these may cause
damage to the unit and give inaccurate
readings.
Precautions shall be taken when handling the
batteries. Injuries, burns, or property damage
may be resulted if the batteries are in contact
with conducting materials, heat, corrosive
materials or explosives. The batteries shall be
taken out from the unit before the product is to
be stored for a long period of time.
Immediately remove all low powered batteries
to avoid leakage and damage. Replace only
with new batteries of the recommended type.

Page 7 of 12
Press the “SET” button a ninth time and the
Day of Week abbreviation will flash. Use the
“PLUS“ button to set the correct day of week.
10. Set 12 or 24 Hour Time Mode:
Press the “SET” button a tenth time and the 12
or 24 Hour Time Mode digits will flash. Use
the “PLUS“ button to set the time mode to
either a 12 or 24 hour clock.
11. Set Temperature Mode - °F or °C:
Press the “SET” button an eleventh time and
the Temperature Mode abbreviation will flash.
Use the “PLUS“ button to set the temperature
mode to °F or °C.
Daylight Saving Time
The National Institute of Standards and
Technology and WWVB encode a special DST
“bit” in the WWVB transmission for DST.
Your La Crosse Technology® clock will read
this information (only if "DST" is set to "On")
and automatically advance the time one hour
in the spring and back an hour in the fall.
Arizona and Indiana: If you live in an area that
does not recognize DST you must de-activate
Daylight Saving Time by setting "DST" to
"OFF"
See "Set Daylight Saving Time ON/OFF" on
page 6 for instructions.
Setting the Daily Alarms:
To turn the alarm on:
Press the "ALARM" button. The LCD will
display the alarm icon .
To set the Alarm Time - Hour: Press and
hold down the "ALARM" button for 2 seconds
until the hours digits flash. Use the “PLUS”
button to set the hour. Press the "ALARM"
button to confirm your setting and move to
setting the minutes.
To set the Alarm Time - Minutes: The
Minutes digits of the Alarm Time will flash. Use
the “PLUS” button to set the minutes. You can
hold the "PLUS" button in to speed up the
setting of minutes by using five minute
increments. Press the "ALARM" button to
confirm your minutes setting and to end the
setting procedure.
To activate or deactivate the daily alarms,
briefly press the “ALARM” button once. When
the alarm is active the clock displays the alarm
Page 8 of 12
icon below the word "ALARM". When
deactivated, the alarm icon does not
display.
About the Daily Alarms:
After 30 seconds without pressing any button
the clock switches automatically from alarm
setting mode to normal clock mode.
The alarm will sound for 85 seconds if not
deactivated. You can deactivate it by pressing
any button. The alarm will be repeated
automatically after 24 hours.
The alarm uses 3 different patterns of tone,
beginning gently and increasing in intensity,
known as a "Crescendo Alarm". The effect is
to provide increasing levels of alarm to ensure
waking while providing a gentle alarm to
lighter sleepers.
Automatic Snooze function:
While the alarm is sounding, press the
"SNOOZE" button to activate the snooze
function. The alarm icon flashes on the
display until the alarm sounds again when the
Snooze period is over (10 minutes).
Pressing the "SNOOZE" button moves the
alarm back by 10 minutes and the alarm will
restart at this time.
The Snooze function can be interrupted by
pressing any button.
Online Resources
Visit the WS-8115U page online at:
http://www.lacrossetechnology.com/8115
Care and Maintenance
Extreme temperatures, vibration and shock
should be avoided as these may cause
damage to the unit and give inaccurate
readings.
Precautions shall be taken when handling the
batteries. Injuries, burns, or property damage
may be resulted if the batteries are in contact
with conducting materials, heat, corrosive
materials or explosives. The batteries shall be
taken out from the unit before the product is to
be stored for a long period of time.
Immediately remove all low powered batteries
to avoid leakage and damage. Replace only
with new batteries of the recommended type.

Page 9 of 12
When cleaning the display and casings, use a
soft damp cloth only. Do not use solvents or
scouring agents as they may mark the LCD
and casings.
Do not submerge the unit in water.
Furthermore, fix all parts in place where the
units are adequately protected against
moisture and rain.
Special care shall be taken when handling a
damaged LCD display. The liquid crystals can
be harmful to user's health.
Do not make any repair attempts to the unit.
Return them to their original point of purchase
for repair by a qualified engineer. Opening and
tampering with the unit may invalidate their
guarantee.
Never touch the exposed electronic circuit of
the device as there is a danger of electric
shock should it become exposed.
Do not expose the units to extreme and
sudden temperature changes, this may lead to
reduce their accuracy.
Batteries are the single largest cause of
customer support cases. Please use plain
Alkaline batteries testing no less than 1.48 on
a voltmeter or with and expiration date 7 years
in the future.
Battery Replacement
If you notice that the LCD appears faint or that
WWVB time reception is not working properly,
try a fresh set of batteries before contacting
customer support.
The Low Battery Icons:
When the batteries need to be replaced in the
Wireless Outdoor Sensor, the LCD will display
the “TX” icon.
When the batteries need to be replaced in the
Atomic Clock, the LCD will display the “RX”
icon.
We recommend that you replace the
batteries in all units regularly to ensure
optimum accuracy of these units. Please
see the battery life in the specifications
below.
Help us to keep our environment clean. Return
used batteries to an authorized depot.
Page 10 of 12
Specifications
Battery Life - Atomic Clock: Up to 24
months
Battery Type - Atomic Clock: 2 X AA (IEC
LR6, 1.5V)
Battery Life - Wireless Outdoor
Temperature Sensor: Up to 12 months - 2 X
Battery Type - Wireless Outdoor
Temperature Sensor: 2 X AAA (IEC LR3,
1.5V)
Indoor thermometer measurement range:
14.2°F to 99.9° F (-9.9°C to 37.8°C)
Indoor temperature update interval: every
16 seconds
Wireless Outdoor Temperature Sensor
measurement range: -39.8° F to 139.8° F (-
39.9° C to 59.9° C)
Outdoor temperature update interval: every
8 seconds
Wireless Outdoor Temperature Sensor
transmission range: 200 feet.
Dimensions - Atomic Clock: 8.95” L x 1.20”
W x 7.20” H
Dimensions - Wireless Outdoor
Temperature Sensor: 1.27” L x 0.55” W x
3.41” H
Power Requirements
Note: Rechargeable batteries are not
recommended due to the wide variation in
performance between brands and types. Please
use only fresh Alkaline batteries.
Atomic Clock: 2 “AA” Alkaline Batteries (not
included)
Wireless Outdoor Temperature Sensor:
2 “AAA” Alkaline Batteries (not included)
FCC Statement
FCC ID: OMO-TX38U
This device complies with part 15 of the FCC rules.
Operation is subject to the following conditions: (1)
This device may not cause harmful interference,
and (2) This device must accept any interference
received, including interference that may cause
undesired operation.
Freq. 915 MHz
La Crosse Technology
Model: TX38-IT-N

Page 9 of 12
When cleaning the display and casings, use a
soft damp cloth only. Do not use solvents or
scouring agents as they may mark the LCD
and casings.
Do not submerge the unit in water.
Furthermore, fix all parts in place where the
units are adequately protected against
moisture and rain.
Special care shall be taken when handling a
damaged LCD display. The liquid crystals can
be harmful to user's health.
Do not make any repair attempts to the unit.
Return them to their original point of purchase
for repair by a qualified engineer. Opening and
tampering with the unit may invalidate their
guarantee.
Never touch the exposed electronic circuit of
the device as there is a danger of electric
shock should it become exposed.
Do not expose the units to extreme and
sudden temperature changes, this may lead to
reduce their accuracy.
Batteries are the single largest cause of
customer support cases. Please use plain
Alkaline batteries testing no less than 1.48 on
a voltmeter or with and expiration date 7 years
in the future.
Battery Replacement
If you notice that the LCD appears faint or that
WWVB time reception is not working properly,
try a fresh set of batteries before contacting
customer support.
The Low Battery Icons:
When the batteries need to be replaced in the
Wireless Outdoor Sensor, the LCD will display
the “TX” icon.
When the batteries need to be replaced in the
Atomic Clock, the LCD will display the “RX”
icon.
We recommend that you replace the
batteries in all units regularly to ensure
optimum accuracy of these units. Please
see the battery life in the specifications
below.
Help us to keep our environment clean. Return
used batteries to an authorized depot.
Page 10 of 12
Specifications
Battery Life - Atomic Clock: Up to 24
months
Battery Type - Atomic Clock: 2 X AA (IEC
LR6, 1.5V)
Battery Life - Wireless Outdoor
Temperature Sensor: Up to 12 months - 2 X
Battery Type - Wireless Outdoor
Temperature Sensor: 2 X AAA (IEC LR3,
1.5V)
Indoor thermometer measurement range:
14.2°F to 99.9° F (-9.9°C to 37.8°C)
Indoor temperature update interval: every
16 seconds
Wireless Outdoor Temperature Sensor
measurement range: -39.8° F to 139.8° F (-
39.9° C to 59.9° C)
Outdoor temperature update interval: every
8 seconds
Wireless Outdoor Temperature Sensor
transmission range: 200 feet.
Dimensions - Atomic Clock: 8.95” L x 1.20”
W x 7.20” H
Dimensions - Wireless Outdoor
Temperature Sensor: 1.27” L x 0.55” W x
3.41” H
Power Requirements
Note: Rechargeable batteries are not
recommended due to the wide variation in
performance between brands and types. Please
use only fresh Alkaline batteries.
Atomic Clock: 2 “AA” Alkaline Batteries (not
included)
Wireless Outdoor Temperature Sensor:
2 “AAA” Alkaline Batteries (not included)
FCC Statement
FCC ID: OMO-TX38U
This device complies with part 15 of the FCC rules.
Operation is subject to the following conditions: (1)
This device may not cause harmful interference,
and (2) This device must accept any interference
received, including interference that may cause
undesired operation.
Freq. 915 MHz
La Crosse Technology
Model: TX38-IT-N