La Crosse Technology WS 811561 User Manual
La Crosse Technology®  
WS-811561  
IT915 MHz  
Atomic Digital Clock and Temperature  
Station with Wireless Solar-Powered  
Outdoor Temperature Sensor  
Wireless Weather Instruments by  
La Crosse Technology®  
La Crosse Technology, Ltd.  
www.lacrossetechnology.com  
2809 Losey Blvd. S  
La Crosse, WI 54601  
Phone 608-782-1610  
Table of Contents  
Table of Contents ....................................................... 1  
Inventory of Contents ................................................. 2  
Features and Specifications ....................................... 2  
Initial Set Up and Wireless Synchronization............... 3  
TX61U-IT Sensor Power Save "STOP" Mode ............ 4  
Set the Time and Date................................................ 4  
Page 1 of 12  
 
TX61U-IT Wireless Solar-Powered Outdoor Sensor:  
•
The TX61U-IT sensor sends the collected outdoor  
temperature to your existing wireless display by  
way of a 200 Ft wireless signal.  
High-efficiency modern solar panel maintains full  
charge with minimal light  
•
•
•
Stores solar power for continuous operation  
Batteries are a built-in (non-replaceable) Alkaline  
power cell  
•
•
Wall hanging or free standing  
Outdoor measurement range:  
-39.8°F to 139.8°F (-39.9°C to 59.9°C)  
with 0.1°C resolution. “OFL” displayed if outside  
range  
•
•
•
•
•
Outdoor temperature update rate:  
Every 8 seconds  
915 MHz Wireless range:  
Up to 200 Ft. (60.96m) open air  
Dimensions: 1.7"L x .93"W x 3.94"H  
(43 x 100 x 23.5 mm)  
Signal reception and re-synchronization:  
903MHz, 915MHz and 927MHz  
Operating voltage: 2.5V or higher than 2.5V  
Initial Set Up and Wireless Synchronization  
1. Initialize the Sensor  
It is important to  
allow sufficient light  
to reach the solar  
panel while  
activating the sensor.  
Make sure the lights  
are on in the setup room and the solar panel is  
facing a 60W light bulb or brighter - do not cover  
with hands or other objects. To begin the set up  
process, use the included plastic reset rod to  
GENTLY PUSH the reset button once in the hole  
on the front of the sensor with the LCD/solar panel  
facing a light source. All LCD segments will light  
up briefly. The code number and the security code  
(example: "20") of the model will be displayed  
sequentially. Next, the battery voltage will appear  
on the LCD. Then the current temperature will  
appear on the sensor's LCD and it will start to  
transmit the wireless temperature signal.  
Note: Sensor battery voltage must be higher than  
2.5V to maintain normal operation. When the  
voltage of the TX61U-IT sensor is lower than  
2.5V, the signal transmission stops and “LO” is  
displayed on the LCD for approx. 2 seconds  
before the sensor enters the "IDLE" mode. In  
"IDLE" mode, the LCD turns off and the sensor  
charges up the internal rechargeable batteries  
Page 3 of 12  
 
automatically. When the battery voltage charges  
to 2.5V, the LCD will turn on and the transmission  
of signal will start again.  
2. Install Batteries into Wireless Display  
Insert 2 new "AA", 1.5 volt ALKALINE batteries  
into the wireless display according to the polarity  
marked on the battery compartment. Make sure to  
do this within 2 minutes of performing the start up  
process for the TX61U-IT. (Diagram on page 3)  
Once the batteries are properly installed in the  
wireless display, the unit will beep and all  
segments of its LCD will light up briefly. The  
indoor temp and the time (displayed as 12:00) will  
appear on the LCD. If it does not appear after 30  
seconds, please reinstall the wireless display  
batteries and try again. Once the indoor data is  
displayed, proceed to the next step.  
3. Wireless Temperature Reception  
After the wireless display is powered up, it will  
start receiving data from the TX61U-IT sensor. If  
reception is successful, the outdoor temp will  
appear on the wireless display. If the outdoor  
temp does not display within 5 min, remove the  
batteries from the display and go back to Step 1  
(make sure the batteries are fresh).  
4. Distance Between Units  
To ensure sufficient wireless communication, the  
final distance between the wireless display and  
the sensor should be no more than 200 ft (60.96  
meters) (obstacles can reduce this distance).  
TX61U-IT Sensor Power Save "STOP" Mode  
If the TX61U-IT sensor is placed in a dark environment  
for 24 hours, it will enter into the "STOP" mode to save  
power. The LCD will turn off and it will stop transmitting  
the data. If this happens, press the reset button on the  
TX61U-IT sensor to wake it up. If the voltage is higher  
than 2.5V, the LCD will turn on again and resume the  
transmission of the wireless temperature signal.  
If the voltage is lower than 2.5V, “LO” will appear on  
the LCD and the sensor will enter into "IDLE" mode.  
Move the sensor to a brightly lit area. In "IDLE" mode,  
the LCD turns off and the sensor charges up the  
internal rechargeable batteries automatically. When  
the battery voltage charges to 2.5V, the LCD will turn  
on and the transmission of signal will start again.  
Set the Time and Date  
The WS-811561 Wireless Display will automatically set  
its time based on daily WWVB reception. The signal is  
Page 4 of 12  
   
attempted at the full hour between 12:00 am to 6:00  
am. For best reception, place the display with the front  
or back facing Colorado. After a successful reception,  
no more reception attempt would be made until the  
following day.  
If the display is in an area of your home where the  
WWVB signal cannot be received, you can set the  
date and time manually.  
In either case, the Time Zone must be set manually.  
Note: The "SET" button is used  
to enter SET mode. The display  
will exit SET mode automatically  
after 15 seconds of inactivity.  
1. Set the Time Zone  
(back view)  
Press the “SET” button and the  
Time Zone display will flash. Use the “PLUS” button  
to select the desired Time zone setting.  
•
•
•
•
•
•
-5: EST – Eastern (default setting)  
-6: CST – Central  
-7: MST - Mountain  
-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)  
-1,-2,-3 - Other time zones  
-4: ATL - Atlantic  
Note: North American time zones are negative  
numbers.  
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").  
3. Set Language:  
Press the “SET” button a third time and the  
Language Abbreviation will flash. Press the "PLUS"  
button to select the display language. A three-letter  
abbreviation for the day of the week will display in  
the bottom of the LCD as the setting flashes above.  
Language choices include:  
US: English (default setting)  
F: French (Français)  
E: Spanish (Español)  
d: German (Deutsch)  
Page 5 of 12  
4. Set Time - Hour:  
Press the “SET” button a fourth time and the Hours  
digits will flash. Use the “PLUS“ button to select the  
correct hour.  
5. Set Time - Minute:  
Press the “SET” button a fifth time and the Minutes  
digits will flash. Use the “PLUS“ button to select the  
correct minute.  
6. Set Date - Year:  
Press the “SET” button a sixth time and the Year  
digits will flash. Use the “PLUS“ button to select the  
correct year.  
7. Set Date - Month:  
Press the “SET” button a seventh time and the  
Month digits will flash. Use the “PLUS“ button to  
select the correct month.  
8. Set Date - 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 - Day of Week:  
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 again and the Temperature  
Mode abbreviation will flash. Use the “PLUS“  
button to set the temperature mode to °F or °C.  
Setting the Time Alarm  
1. To turn the alarm on:  
Press the "ALARM" button. The LCD will display the  
alarm icon  
.
2. 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.  
3. To set the Alarm Time - Minutes:  
Page 6 of 12  
 
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.  
4. To activate or deactivate the daily alarm:  
Briefly press the “ALARM” button once. When the  
alarm is active the clock displays the alarm icon  
below the word "TIME", when the alarm is deactivated,  
the alarm icon  
will not display.  
5. About the Time Alarm:  
After 15 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".  
Battery Replacement Information  
Wireless Display  
To replace the batteries in the wireless display:  
1. Lift up the battery compartment cover and remove  
the batteries.  
2. Please take note to install the batteries with the  
proper polarity as it relates to the battery diagram  
inside the battery compartment (+). The batteries  
will fit tightly. To avoid start-up problems please  
ensure that the batteries do not spring free.  
3. Replace compartment cover.  
Please follow the steps listed in the Setup section of  
this manual to ensure that the wireless data reception  
is successful.  
The TX61U-IT Wireless Solar-Powered Sensor  
Does Not have replaceable batteries.  
The TX61U-IT uses solar power and automatically  
charges the internal power cell(s). No battery  
replacement is needed.  
Help us to keep our environment clean. Please  
take any used batteries to an authorized depot  
for recycling.  
Page 7 of 12  
 
Installation Notes  
Point the TX61U-IT solar panel toward the best  
available light source to recharge the batteries, but  
avoid a location in direct sun as it will cause incorrect  
temperature readings. We recommend facing the solar  
panel East to catch the early morning sun, and placing  
under an eave or overhang to avoid overhead sun.  
The TX61U-IT sensor uses internal rechargeable  
batteries to store the collected solar power.  
The sensor features a high-efficiency solar panel that  
maintains a full charge with minimal indirect light. Do  
not place in direct sun, as this will cause incorrect  
temp readings.  
Fog and mist will not harm the sensor but direct rain  
must be avoided.  
The TX61U-IT sensor has a wireless range of 200 feet  
(60.96 m). Keep in mind that the 200 ft range equates  
to an open air scenario with no obstructions, and that  
radio waves DO NOT curve around objects. The actual  
transmission range will vary depending on the path of  
the signal. Each obstruction (roof, walls, floors,  
ceilings, thick trees, etc.) will effectively cut the signal  
range in half.  
Example: If the TX61U-IT sensor, with a 200 feet  
(60.96 m) range, is mounted on an exterior wall, the  
signal must then pass through one exterior wall, one  
interior wall, and across the 10 feet (3 m) width of the  
room between the 2 walls to reach the wireless  
display. The first wall will reduce the range to 100 feet  
(30.48 m), and the second wall will reduce the range to  
50 feet (15.24 m). Factoring in the 10 foot room, this  
leaves a maximum of 40 feet (12. 2 m) of remaining  
signal range.  
This allowance is typically enough for a frame wall with  
non-metallic siding; however certain materials can  
reduce range even further. Metal siding, stucco, and  
some types of glass can reduce signal range by as  
much as ¾ or more, compared to the ½ reduction  
typical of most obstructions. It is possible to receive a  
signal through these materials, however maximum  
range will be much less due to their tendency to  
absorb or reflect a much larger portion of the sensor’s  
signal.  
The TX61U-IT sensor measures and transmits signal  
about every 8 seconds when its battery voltage is  
higher than 2.5V.  
Once the reset button is pressed on the TX-61U  
sensor and the batteries are inserted into the wireless  
display, the units will try to synchronize  
communication. If the wireless display fails to receive  
Page 8 of 12  
 
the outdoor temp, this means that the sensor is either  
located too close or too far from the wireless display.  
Please adjust the location of the TX61U-IT sensor and  
try again. If it fails again, please restart the set up  
procedure (see below).  
Mounting the Units  
The TX61U-IT Sensor  
The sensor can be set on a table or mounted onto a  
wall using the included screws.  
Mounting the Sensor with Screws  
1. Remove the mounting bracket  
from the TX61U-IT sensor.  
2. Place the mounting bracket over  
the desired location.  
3. Mark the mounting surface with a  
pencil through the two screw  
holes of the bracket.  
4. Screw the mounting bracket onto  
the mounting surface. Ensure that the screws are  
tight against the bracket.  
5. Insert the TX61U-IT sensor into the bracket.  
Table Standing and Other Mounting Options  
With the mounting bracket installed at the  
bottom or on the top of the TX61U-IT  
sensor, the user can place it on any flat  
surface.  
IMPORTANT NOTE: Before permanently  
attaching the TX61U-IT sensor base, place  
all units in the desired locations to check  
that the outdoor temperature readings are  
being received. In the event that the signal is not  
received, relocate the TX61U-IT sensor (or move them  
slightly) to improve the signal reception.  
The Wireless Display  
The wireless display can be set on a table or mounted  
onto a wall.  
Table Standing  
The two foldout table stands are  
located on the bottom of the  
back side of the wireless display.  
Pull the stands out from the  
center to fully extend them.  
fold out legs  
Wall Mounting  
Select a place to mount the wireless  
display. Install a mounting screw (not included). Align  
the "Hanging Hole" to the mounting screw and ensure  
that the wireless display locks down into place before  
releasing the wireless display.  
Page 9 of 12  
 
Online Resources  
Visit the WS-811561 page online at:  
http://www.lacrossetechnology.com/811561  
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.  
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. Contact  
the La Crosse Technology® Warranty Department for  
help. 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, as this may lead to reduce their  
accuracy.  
Troubleshooting  
For more product information, visit  
http://www.lacrossetechnology.com/811561  
Batteries:  
Battery problems are the single largest cause of  
customer support cases. A few things to check:  
•
Use fresh batteries  
Please use plain Alkaline batteries in the wireless  
display that test no less than 1.48 on a voltmeter  
or with an expiration date that is 7 years in the  
future.  
Page 10 of 12  
     
•
Ensure correct polarity  
Ensure that the wireless display has fresh  
batteries and are installed using correct polarity as  
shown inside the battery compartment (+).  
Sensor Location:  
Before permanently fixing the TX61U-IT sensor wall  
bracket, temporarily place both the sensor and the  
wireless display in their desired locations, then check  
that the outdoor temperature reading is being received.  
In the event that the signal is not received, relocate the  
TX61U-IT sensor (remembering the 200 ft open air  
wireless range) or move both units slightly as this may  
help the signal reception.  
TX61U-IT sensor LCD is turned "OFF":  
Pease read step 1 of the Initial Setup… section on  
page 3 or "TX61U-IT sensor Power Save "STOP"  
Mode" on page 4.  
Warranty Information  
La Crosse Technology, Ltd provides a 1-year limited  
warranty on this product against manufacturing defects in  
materials and workmanship.  
This limited warranty begins on the original date of purchase,  
is valid only on products purchased and used in North  
America and only to the original purchaser of this product. To  
receive warranty service, the purchaser must contact La  
Crosse Technology, Ltd for problem determination and  
service procedures. Warranty service can only be performed  
by a La Crosse Technology, Ltd authorized service center.  
The original dated bill of sale must be presented upon  
request as proof of purchase to La Crosse Technology, Ltd or  
La Crosse Technology, Ltd’s authorized service center.  
La Crosse Technology, Ltd will repair or replace this product,  
at our option and at no charge as stipulated herein, with new  
or reconditioned parts or products if found to be defective  
during the limited warranty period specified above. All  
replaced parts and products become the property of La  
Crosse Technology, Ltd and must be returned to La Crosse  
Technology, Ltd. Replacement parts and products assume  
the remaining original warranty, or ninety (90) days,  
whichever is longer. La Crosse Technology, Ltd will pay all  
expenses for labor and materials for all repairs covered by  
this warranty. If necessary repairs are not covered by this  
warranty, or if a product is examined which is not in need or  
repair, you will be charged for the repairs or examination.  
The owner must pay any shipping charges incurred in getting  
your La Crosse Technology, Ltd product to a La Crosse  
Technology, Ltd authorized service center. La Crosse  
Technology, Ltd will pay ground return shipping charges to  
the owner of the product to a USA address only.  
Your La Crosse Technology, Ltd warranty covers all defects  
in material and workmanship with the following specified  
exceptions: (1) damage caused by accident, unreasonable  
use or neglect (including the lack of reasonable and  
necessary maintenance); (2) damage occurring during  
shipment (claims must be presented to the carrier); (3)  
damage to, or deterioration of, any accessory or decorative  
Page 11 of 12  
 
surface; (4) damage resulting from failure to follow  
instructions contained in your owner’s manual; (5) damage  
resulting from the performance of repairs or alterations by  
someone other than an authorized La Crosse Technology,  
Ltd authorized service center; (6) units used for other than  
home use (7) applications and uses that this product was not  
intended or (8) the products inability to receive a signal due to  
any source of interference.. This warranty covers only actual  
defects within the product itself, and does not cover the cost  
of installation or removal from a fixed installation, normal set-  
up or adjustments, claims based on misrepresentation by the  
seller or performance variations resulting from installation-  
related circumstances.  
LA CROSSE TECHNOLOGY, LTD WILL NOT ASSUME  
LIABILITY FOR INCIDENTAL, CONSEQUENTIAL,  
PUNITIVE, OR OTHER SIMILAR DAMAGES ASSOCIATED  
WITH THE OPERATION OR MALFUNCTION OF THIS  
PRODUCT. THIS PRODUCT IS NOT TO BE USED FOR  
MEDICAL PURPOSES OR FOR PUBLIC INFORMATION.  
THIS PRODUCT IS NOT A TOY. KEEP OUT OF  
CHILDREN’S 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, please contact:  
La Crosse Technology, Ltd  
2817 Losey Blvd. S.  
La Crosse, WI 54601  
Phone: 608.782.1610 Fax: 608.796.1020  
For online contact / support / e-mail:  
www.lacrossetechnology.com/support  
For information on other products visit  
www.lacrossetechnology.com  
FCC DISCLAIMER  
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.  
(2)This device must accept any 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.  
Page 12 of 12  

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