La Crosse Technology Weather Radio WS 7394U User Manual

WS-7394U  
Wireless 433 MHz  
Wireless Weather Station  
Instruction Manual  
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INVENTORY OF CONTENTS  
1. WS-7394U—indoor weather station  
2. TX6U—remote temperature sensor  
3. Instruction manual and warranty card  
ADDITIONAL EQUIPMENT (not  
included)  
1. Five fresh AA 1.5V alkaline batteries.  
2. One wall-mounting screw (optional)  
ABOUT WWVB (radio-controlled time)  
The NIST (National Institute of Standards and Technology—Time and  
Frequency Division) radio station, WWVB, 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 indoor weather station. However, due to the nature of the Earth’s  
Ionosphere, reception is very limited during daylight hours. The indoor weather  
station 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 continually measure every second of  
every day to an accuracy of ten billionths of a second a 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  
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QUICK SET-UP GUIDE  
Hint: Use good quality Alkaline Batteries and avoid rechargeable batteries.  
1. Have the indoor weather station and remote temperature sensor 3  
to 5 apart.  
2. Batteries should be out of both units for 15 minutes.  
3. Place the batteries into the remote temperature sensor first then  
into the indoor weather station.  
(All remote temperature sensors must be started before the indoor  
weather station)  
4. DO NOT PRESS ANY BUTTONS FOR 15 MINUTES.  
In this time the indoor weather station and remote temperature sensor will start  
to talk to each other and the indoor weather station will show both the indoor  
temperature and humidity and the outdoor temperature. If the indoor weather  
station does not display all values after the 15 minutes please retry the set up as  
stated above. After all values are displayed for 15 minutes you can place your  
remote temperature sensor outdoors and set your time.  
The remote temperature sensor should be placed in a dry, shaded area. The  
remote temperature 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 300 ft. in a straight  
line.  
NOTE: Fog and mist will not harm your remote temperature sensor but direct  
rain must be avoided.  
To complete the set up of your indoor weather station after the 15  
minutes have passed please follow the steps in the Detailed Set Up  
Guide.  
Note: The remote temperature sensor transmits a signal every 3 minutes; after  
the batteries have been installed, the indoor weather station will search for the  
signal for a duration of 5 minutes. If there is no temperature reading in the  
OUTDOOR LCD after 5 minutes, make sure the units are within range of each  
other, or repeat the battery installation procedure.  
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DETAILED SET-UP GUIDE  
I. Battery Installation  
Batteries will fit tightly. To avoid start-up problems, make sure that the  
batteries do not spring free. Also be sure to insert alkaline batteries into the  
remote temperature sensor first, then the indoor weather station. Initial set  
up should be done with the remote temperature sensor and indoor weather  
station in the same room. The units should be permanently mounted only  
after the signal reception has been verified.  
A. Remote Temperature Sensor  
1. Remove the mounting bracket. The bracket  
snaps on and off easily.  
2. Remove the battery cover, by sliding the cover  
Battery  
Cover  
down.  
3. Observing the correct polarity install 2 AA  
batteries. The batteries will fit tightly (to avoid  
start-up problems make sure they do not spring  
free).  
4. 4. Replace the battery cover by sliding  
upwards. Be sure battery cover is on securely.  
B. Indoor Weather Station  
1. Remove the battery  
cover (the cover has  
white writing on it).  
2. Observe the correct  
polarity, and install  
two Alkaline AA  
batteries.  
3. Do not press any  
buttons for at least  
ten minutes. If a  
button is pressed  
before the indoor  
weather station has  
received information  
from the TX4U  
sensor, no data will  
be received from that  
sensor until reset.  
4. Replace the battery  
cover.  
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II. Start Up Sequence  
A. Initial Start  
1. Immediately after the batteries have been installed the LCD will  
completely light up for a brief moment.  
2. All information will then appear in normal mode, with “12:00” as  
the default time and “WE.1” as the default date (2004 as the year).  
3. The indoor temperature and humidity, and barometric air pressure  
(as 29.91 inHg relative RH) will also be displayed.  
4. There is a “satellite” icon that appears in the bottom portion of the  
LCD, to the left of the outdoor temperature— this icon informs the  
user that the indoor weather station is looking for signals from the  
remote temperature sensor. Within five minutes the remote  
temperature should be displayed—if not, remove batteries from all  
units and repeat battery installation, the remote temperature sensor  
first, then the indoor weather station.  
B. WWVB Reception  
1. Once the batteries are installed in the indoor weather station it will  
automatically search for the WWVB signal. If it receives a good  
signal (which is unlikely during daylight hours in most locations),  
the WWVB reception indicator (looks like a tower icon) will flash.  
The indoor weather station requires five full minutes of good  
reception to successfully capture the signal and set to the correct  
hour, minute, second, month, day and year. If the signal reception  
is not successful within ten minutes, the signal search will be  
cancelled and will automatically resume every two hours until the  
signal is successfully captured.  
2. The signal is sent from Ft. Collins, Colorado only and is similar to  
an AM radio signal. Atmospheric interferences such as storms,  
sunspots, and even sunlight will cause the signal to not travel as  
far.  
3. To maximize reception, place the indoor weather station in a  
window facing Colorado, at least six feet from any electrical  
source (computers, televisions, refrigerators, etc.). Do not move  
the indoor weather station while it is searching for the signal.  
4. The time and date can be manually set. Once the signal is captured,  
it will override any time and date set to the time zone selected.  
5. Once the time and date are set, the indoor weather station will  
conduct a search every night at midnight and correct to the  
accurate time and date (Daylight Saving Time is automatic). If the  
signal has been received in the past 24 hours, the reception  
indicator will be displayed.  
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III. Explanation of LCD Information  
A. The below picture highlights the LCD features.  
Radio-controlled time  
WWVB Reception  
Indicator  
Date Display  
Comfort Icon  
Indoor Temperature  
Humidity Display  
Air Pressure Trend  
Indicator  
Forecast Icon  
Barometric Air  
Pressure  
12-hour Air  
Pressure History  
Outdoor Temperature  
Display  
Remote Sensor Number  
(Up to 3 Total)  
B. There are many different modes the indoor weather station can be set  
to. The LCD shown is the normal operating mode, and your actual data  
shown will be different based on your local settings and conditions.  
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IV. Function Key Layout  
A. The below picture shows the four function keys used in programming  
and operation of your indoor weather station  
V. Program Mode  
The program mode is laid out in a manner that allows you to program each  
function separately, or you can follow the instructions entirely to program the  
indoor weather center. Complete programming is usually done for the initial  
set-up, and will require you to skip step 1,2 and 3 of each programming section.  
The programming mode can be exited at any time by either pressing the “CH”  
button, or waiting for the 15-second time-out to take effect.  
A. Overview of programming mode sequence  
1. LCD Contrast  
4. Radio-controlled 5. 12/24-hour  
Time ON/OFF time mode  
7. Minute 8. Year  
10. Date  
2. Time Zone  
3. DST ON/OFF  
6. Hour  
9. Month  
12. inHg/hPa  
11. °F/°C  
13. Relative pressure 14. Forecast  
setting  
sensitivity  
B. LCD Contrast Setting  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “OUT/+” button  
to select the desired LCD contrast  
setting.  
4. Press and release the “SET” button to confirm the LCD contrast  
setting and continue to the Time Zone setting.  
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C. Time Zone Setting  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button  
once more to advance to the Time Zone  
setting.  
4. A number will flash to the left of the letter “h” at the top of the  
display just below the time display.  
5. Press and release the “OUT+” button to select the desired time  
zone.  
6. Press and release the “SET” button to confirm the Time Zone  
setting and continue to the DST ON/OFF setting.  
D. DST ON/OFF Setting  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button  
twice more to advance to the DST  
ON/OFF setting.  
4. “DST” will appear above the indoor temperature/humidity display  
and “ON” or “OFF” will flash above that.  
5. Press and release the “OUT/+” button to select DST ON/OFF.  
Note: Some locations (Arizona and parts of Indiana) do not follow Daylight  
Saving Time.  
6. Press and release the “SET” button to confirm the DST ON/OFF  
setting and continue to the Radio-controlled Time ON/OFF setting.  
E. Radio-controlled Time ON/OFF Setting  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button  
three more times to advance to the  
Radio-controlled time ON/OFF setting.  
4. “RCC” will appear above the indoor temperature/humidity display  
and “ON” or “OFF” will flash above that.  
5. Press and release the “OUT/+” button to select Radio-controlled  
time ON/OFF setting.  
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6. Press and release the “SET” button to confirm the Radio-  
controlled time ON/OFF setting and continue to the 12/24-hour  
Time Mode setting.  
F. 12/24-hour Time Mode  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button four  
more times to advance to the 12/24-  
hour time mode setting.  
4. “12h” or “24h” will flash above the indoor temperature/humidity  
display.  
5. Press and release the “OUT/+” button to select 12 or 24-hour time  
mode.  
Note: In 12h mode “PM” will appear to the left of the time during PM hours.  
If the time is not within the PM hours nothing will be displayed. Be sure to set  
the time to the correct AM/PM time to ensure automatic reception.  
6. Press and release the “SET” button to confirm the 12/24-hour time  
mode setting and continue to the Hour setting  
G. Setting The Hour Manually  
The WWVB signal will override any manual set time and date information. The  
time will be based on the time zone selected.  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button five  
more times to advance to the Manual  
Hour setting.  
4. The hour will begin to flash at the top of the display.  
5. Press and release the “OUT/+” button to select the desired hour.  
6. Press and release the “SET” button to confirm the hour setting and  
continue to the Minute setting.  
H. Setting The Minutes Manually  
1. Press and hold the “SET” button for five seconds.  
2. “lcd” will appear at the top of the display and a number will flash  
next to it.  
3. Press and release the “SET” button six more times to advance to  
the Manual Minutes setting.  
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4. The minutes will begin to flash at the top of the display.  
5. Press and release the “OUT/+” button to select the desired  
minutes.  
6. Press and release the “SET” button to confirm the minutes and  
continue to the Year setting.  
I. Setting The Year Manually  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button  
seven more times to advance to the  
Manual Year setting.  
4. The year will begin to flash below the time display.  
5. Press and release the “OUT/+” button to select the desired year.  
6. Press and release the “SET” button to confirm the year and  
continue to the Month setting.  
J. Setting The Month Manually  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button  
eight more times to advance to the  
Manual Month setting.  
4. The Month will begin to flash below the time display.  
5. Press and release the “OUT/+” button to select the desired month.  
6. Press and release the “SET” button to confirm the month and  
continue to the Date setting.  
K. Setting The Date Manually  
1. Press and hold the “SET” button for five seconds.  
2. “lcd” will appear at the top of the display and a number will flash  
next to it.  
3. Press and release the “SET” button nine more times to advance to  
the Manual Date setting.  
4. The date will begin to flash below the time display.  
5. Press and release the “OUT/+” button to select the desired date.  
6. Press and release the “SET” button to confirm the date and  
continue to the Temperature Measuring Units setting.  
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L. Temperature Measuring Units Selection (°F or °C)  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button ten  
more times to advance to the  
Temperature Measuring Units setting.  
4. °F or °C will flash at the top of the display.  
5. Press and release the “OUT/+” button to select the desired  
temperature-measuring unit.  
6. Press and release the “SET” button to confirm the temperature-  
measuring unit and continue to the Air Pressure Measuring Units  
setting.  
M. Air Pressure Measuring Units Selection (inHg/hPa)  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button  
eleven more times to advance to the Air  
Pressure Measuring Units setting.  
4. inHg or hPa will flash at the top of the display.  
5. Press and release the “OUT/+” button to select the desired air  
pressure-measuring unit.  
6. Press and release the “SET” button to confirm the air pressure-  
measuring unit and continue to the Relative Pressure setting.  
N. Relative Pressure Setting  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button  
twelve more times to advance to the  
Relative Pressure setting.  
4. The barometric air pressure will flash in  
the middle of the display, just below the  
forecast icon  
5. Press and release the “OUT/+” or “IN”  
button to select the desired air pressure-  
measuring unit.  
6. Press and release the “SET” button to confirm the relative pressure  
setting and continue to the Forecast Sensitivity setting.  
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O. Forecast Sensitivity Setting  
1. Press and hold the “SET” button for  
five seconds.  
2. “lcd” will appear at the top of the  
display and a number will flash next to  
it.  
3. Press and release the “SET” button  
thirteen more times to advance to the  
Forecast sensitivity setting.  
4. The two air pressure tendency arrows  
will begin flashing on either side of the  
forecast icon and a flashing number will  
appear under the forecast icon.  
5. Press and release the “OUT/+” button  
to select the desired forecast sensitivity setting.  
Note: Barometric air pressure is usually reported as “relative air  
pressure”. This reading is based on the combination of absolute air  
pressure and altitude. In general, an increase in altitude will result in a  
decrease in air pressure. Relative air pressure will make readings in  
nearby locations relative to each other to allow for proper forecasting.  
The absolute air pressure reading in the Weather Center cannot be  
calibrated, only the relative air pressure.  
6. Press and release the “SET” button to confirm the forecast  
sensitivity setting.  
THE MANUAL SETTING IS NOW COMPLETED  
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FEATURES AND OPERATIONS  
A. Minimum and Maximum Temperature and Humidity  
1. Indoor Minimum and Maximum Temperature and Humidity  
The indoor weather station automatically stores the minimum and  
maximum indoor temperature and humidity. The minimum and  
maximum values are updated automatically when a new minimum  
or maximum is recorded, or until manually reset.  
a. From the normal display mode, press and release the “IN” key  
once to view the indoor maximum temperature and humidity  
(“MAX” will be displayed above the indoor temperature and  
humidity).  
b. Press and release the “IN” key again to view the indoor  
minimum temperature and humidity.  
c. Press and release the “IN” key again to return to the normal  
mode (timeout of viewing minimum/maximum values will  
occur if no keys are pressed for fifteen seconds).  
Note: To reset the indoor minimum and maximum temperature  
and humidity, first display the values you wish to reset (minimum  
or maximum). Next press and hold the “SET” key for at least  
three seconds. You will see then that the values will reset to the  
current temperature and humidity and corresponding time.  
2. Outdoor Minimum and Maximum Temperature  
The indoor weather station automatically stores the minimum and  
maximum outdoor temperature. The minimum and maximum  
values are updated automatically when a new minimum or  
maximum is recorded, or until manually reset.  
a. From the normal display mode, press and release the  
“OUT/+” key once to view the outdoor maximum  
temperature (“MAX” will be displayed above the outdoor  
temperature).  
b. Press and release the “OUT/+” key again to view the outdoor  
minimum temperature.  
c. Press and release the “OUT/+” key again to return to the  
normal mode (timeout of viewing minimum/maximum values  
will occur if no keys are pressed for fifteen seconds).  
Note: To reset the outdoor minimum and maximum temperature,  
first display the values you wish to reset (minimum or maximum).  
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Next press and hold the “SET” key for at least three seconds. You  
will see then that the values will reset to the current temperature  
and corresponding time.  
B. Multiple Remote Temperature Sensors  
The WS-7394U is able to receive signals from 3 different remote  
sensors. These extra remote sensors can be purchased through the same  
dealer as this unit. A TX4U will monitor the temperature, a TX3U will  
monitor temperature and display the temperature on its LCD, a TX3UP  
will monitor the temperature via a probe for measuring soil or water  
temperatures and a TX6U will monitor the temperature only.  
Note: When setting up multiple units it is important to insert batteries  
first into all the remote sensors, and in numeric sequence. Second  
install batteries into the indoor weather station. Transmission  
problems will arise if this is not done correctly and if the total time for  
set-up exceeds 6 minutes  
1. Set Up of Multiple Units  
a. It is necessary to remove the batteries from all units currently  
in operation.  
b. Remove the battery covers to all remote sensors.  
c. Place all remote sensors in a numeric sequential order.  
d. In sequential order, install batteries following the same battery  
installation procedures seen in Detailed Set-Up Guide section  
of this manual.  
e. Install batteries into the indoor weather station.  
f. Follow the Detailed Set-Up Guide for programming and  
operating instructions.  
2. Viewing and Operating with Multiple Remote Sensors  
a. To view the temperature of a different remote sensor press and  
release the “CH” button. A shift from one “boxed” number to  
the next should be observed in the OUTDOOR LCD.  
b. The minimum and maximum temperature of the additional  
remote sensor can be displayed by pressing the “OUT/+”  
button.  
c. To reset the minimum and maximum temperature readings  
press and hold the “SET” button for 3 seconds and that  
temperature record for that remote sensor will be reset only.  
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Each remote sensor will have its own minimum and maximum values  
stored.  
C. Comfort Indicator for Indoor Temperature and Humidity  
1. The comfort level indicator appears inbetween the indoor  
tempearture and humidity.  
2. The indicator will display a “happy-face” when the temperature is  
between 68°F and 79°F (20°C and 25.9°C), and the humidity is  
between 45% and 64%.  
3. A “sad-face” will be displayed when the temperature and humidity  
are outside the mentioned ranges.  
D. Weather Forecast Icon and Pressure Trend Indicators  
The weather forecasting feature is estimated to be 75% accurate, and is  
based solely upon the change of air pressure over time. The WS-  
7394U averages past air-pressure readings to provide an accurate  
forecast—creating a necessity to disregard all weather forecasting for  
12-24 hours after the unit has been set-up, reset, or moved from one  
altitude to another (i.e. from one floor of a building to another floor).  
In areas where the weather is not affected by the change of air pressure,  
this feature will be less accurate.  
1. Weather Icons  
a. There are 3 possible weather icons that will be displayed at  
various times in the center of the indoor weather station.  
i
Sunny—indicates that the weather is expected to improve  
(not that the weather will be sunny).  
ii Sun with Clouds—indicates that the weather is expected to  
be fair (not that the weather will be sunny with clouds).  
iii Clouds with Rain—indicates that the weather is expected  
to get worse (not that the weather will be rainy).  
b. The weather icons change when the unit detects a change in  
air pressure.  
c. The icons change in order, from “sunny” to “sun with clouds”  
to “clouds with rain” or the reverse.  
d. It will not change from “sunny” directly to “clouds with rain”,  
although it is possible for the change to occur quickly.  
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e. If the symbols do not change, the weather has not changed (or  
the change has been slow and gradual).  
f. The sensitivity of the change in foreacst icon is set by the user  
in section F of the Detailed Set Up Guide.  
E. Weather Tendency Arrows  
Pressure trend  
arrow  
1. Along with the forecast icon there  
is a pressure tendency arrow.  
2. There is one that points up (on the  
left side of the LCD) and one that  
points down (on the right side of  
the LCD).  
3. These arrows reflect current changes in the air pressure.  
4. An arrow pointing up indicates that the air pressure is increasing  
and the weather is expected to improve or remain good.  
5. An arrow pointing down indicates that the air pressure is  
decreasing and the weather is expected to become worse or remain  
poor.  
6. No arrow means the pressure is stable.  
7. A storm can be expected if there is a drop of 4 hPa or more in less  
than 6 hours. The clouds with rain icon will be displayed and the  
tendency arrow that points down will be flashing—indicating the  
storm warning feature has been activated. The flashing will stop  
when the air pressure stabilizes or begins to rise.  
F. Barometric Air Pressure Reading  
1. The actual barometric air pressure is displayed directly under the  
weather forecast icon  
2. The relative air pressure is calibrated by the user through the  
programming mode.  
3. Please Follow the programming instructions in section F of the  
Detailed Set Up Guide to set this feature.  
G. Air Pressure History Bar Chart  
1. The bar graph shows in hPa (Hekto Pascal) the recorded air  
pressure over the past 12-hours.  
2. The horizontal axis shows the hours at increments of -12 hours, -9  
hours, -6 hours, -3 hours, and 0 hours (current).  
3. The vertical axis is set by hPa: the “0” on this axis represents the  
current hPa, and + or – 1,3,5, or 7 shows (in hPa) how high or low  
the past air pressure was as compared to the current one.  
4. The “0” on the vertical axis indicates the current air pressure value.  
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5. The “0h” on the horizontal axis indicates the current hour, thus the  
current air pressure also.  
6. Each bar on the bar graph represents a value of 0.03 hPa, and each  
bar also has a corresponding value on the verticle axis.  
7. Air pressure trends can be determined by simply glancing at the  
bar graph.  
a. If the bars are rising (higher on the right than the left) then the  
air pressure has a rising trend, and the weather should  
improve.  
b. If the bars are dropping (lower on the right than the left) then  
the air pressure has a falling trend, and the weather should  
worsen.  
8. Multiply the two values to find past air pressure (note the + or –  
sign of values on the verticle axis); i.e. 0.03 hPa x 3 = 0.09 hPa,  
now add this value to the air pressure (in LCD 4) to evaluate what  
past air pressures have been.  
9. The bar chart will constantly scroll to avoid burnout of the LCD.  
Note: This feature cannot be turned off.  
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VII. MOUNTING  
Note: Before permanently mounting, ensure that the indoor weather station is  
able to receive signals from the sensors and WWVB signal at the desired  
location. To achieve a true temperature reading, avoid mounting the remote  
temperature sensor (or any sensor) where direct sunlight can reach the remote  
sensor. We recommend that you mount the remote sensor on a North-facing  
wall or under an eve. The sending range of the remote temperature sensor is  
300-ft (100m) however obstacles such as walls, concrete, and large metal  
objects can reduce the range. Place all units in their desired location, and wait  
approximately 15 minutes before permanently mounting to ensure that there is  
proper reception. If the indoor weather station loses the signal from the remote  
sensor, it will display the last temperature reading for 15 minutes. After 15  
minutes of not receiving any signals, the remote temperature will display “- -.-”.  
A. Mounting the Remote Temperature Sensor  
The remote temperature sensor can be mounted in two ways:  
with the use of screws  
using the adhesive tape  
1. MOUNTING WITH SCREWS  
a. Remove the mounting bracket from the remote  
temperature sensor.  
b. Place the mounting bracket over the desired location.  
c. Through the three screw holes of the bracket, mark  
the mounting surface with a pencil.  
d. Screw mounting bracket onto the mounting surface.  
Ensure that the screws are flush with the bracket.  
e. Insert the remote temperature sensor into the bracket.  
2. MOUNTING WITH ADHESIVE TAPE  
a. With a nonabrasive solution, clean and dry the back  
of the mounting bracket and the mounting surface to  
ensure a secure hold. The mounting surface should  
be smooth and flat.  
b. Remove the protective strip from one side of the tape.  
c. Adhere the tape to the designated area on the back of  
the mounting bracket.  
d. Remove the protective strip from the other side of the  
tape.  
e. Position the remote temperature sensor in the desired  
location, ensuring that the indoor weather station can  
receive the signal.  
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B. Mounting the WS-7394U Indoor Weather Station  
The indoor weather station can be mounted in two ways:  
with the table stand  
on the wall with the use of a wall hanging screw (not included)  
1. USING THE TABLE STAND  
The indoor weather station comes with the table stand  
already mounted. If you wish to use the table-stand all  
that is required is to place the indoor weather station in an  
appropriate location.  
2. WALL MOUNTING  
a. Remove the table-stand. To do this, pull down on the  
stand from the rear and rotate forward.  
b. Fix a screw (not included) into the desired wall,  
leaving approximately 3/16 of an inch (5mm)  
extended from the wall.  
c. Place the indoor weather station onto the screw using  
the hanging hole on the backside.  
d. Gently pull the indoor weather station down to lock  
the screw into place.  
Maintenance and Care Instructions  
A. Extreme temperatures, vibration, and shock should be avoided to  
prevent damage to the units.  
B. Clean displays and units with a soft, damp cloth. Do not use solvents  
or scouring agents; they may mark the displays and casings.  
C. Do not submerge in water.  
D. Immediately remove all low powered batteries to avoid leakage and  
damage.  
E. Opening the casings invalidates the warranty. Do not try to repair the  
unit. Contact La Crosse Technology for repairs.  
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TROUBLESHOOTING  
Problem: The LCD is faint.  
Solution: 1) Set the LCD contrast to a higher level.  
2) Replace batteries.  
Problem: No outdoor temperature is displayed.  
Solution: 1) Remove all batteries, reinsert into the remote temperature sensor  
first, then into the indoor weather station.  
2) Place remote temperature sensor closer to the indoor weather station.  
3) Be sure all batteries are fresh.  
4) No other interfering sources are being used (such as computer  
monitors, TV sets, headphones, or speakers) in the vicinity. The  
signal travels in a straight line, an electrical source near that “line”  
may cause interference.  
Problem: Temperature or air pressure is incorrect.  
Solution: 1) Check/Replace batteries.  
2) If multiple remote sensors are in use, check location with  
corresponding “boxed numbers.”  
3) Move away from sources of heat/cold.  
4) Adjust relative air pressure to a value from a reliable source (TV  
radio, etc.).  
5) The indoor weather station and remote sensors are calibrated at the  
factory. If there is a consistent problem, please call La Crosse  
Technology.  
Problem: WWVB time and date will not set or update  
Solution: 1) Wait until overnight for signal to be received  
2) Move indoor weather station away from sources of electricity  
3) Place indoor weather station in window facing Colorado  
4) The first reception is most difficult, as the indoor weather station  
needs five continual minutes of clear signal reception. After the  
initial time/date set, the indoor weather station only requires one  
full minute of clear reception each night.  
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SPECIFICATIONS  
Indoor weather station  
recommended operating  
temperature  
32°F to 122°F (0°C to 50°C)  
LCD contrast  
8 levels (0-7)  
Temperature measuring range  
Indoor  
14.2°F to 139.8°F with 0.2°F resolution  
(-9.9°C to 59.9°C with 0.1°C resolution)  
(“OFL” displayed if outside this range)  
Outdoor  
-21.8°F to 157.8°F with 0.2°F resolution  
(-29.9°C to 69.9°C with 0.1°C resolution)  
(“OFL” displayed if outside this range)  
Relative humidity range  
Indoor  
1% to 99% with 1% resolution, indoor  
weather station displays “--.-” if outside  
this range  
Air pressure  
Relative hPa (adjustable)  
Relative inHg (adjustable)  
Sensitivity setting hPa  
Air pressure history  
960 hPa to 1040 hPa  
28.35 inHg to 30.72 inHg  
2 hPa to 4 hPa  
For the past 12 hours  
(0, -3, -6, -9, and -12 hours)  
Data checking intervals  
Indoor temperature  
Indoor humidity  
Every 15 second  
Every 20 seconds  
Every 5 minutes  
Outdoor temperature  
Sensor reading update (within sensor)  
Outdoor temperature  
Transmission frequency  
Transmission range  
Every 1 minute  
433.92 MHz  
300 feet (100m)  
Power supply  
Indoor weather station:  
Remote temperature sensor:  
Dimensions (H x W x D)  
Indoor weather station  
2 x AA (IEC LR6) 1.5V batteries.  
2 x AA (IEC LR6) 1.5V batteries.  
8.75” x 4” x 1.5”  
(222 x 102 x 38 mm)  
Remote temperature sensor  
5.04” x 1.57“ x 0.9”  
(128 x 40 x 23 mm)  
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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 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 no 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  
2809 Losey Blvd. S.  
La Crosse, WI 54601  
Phone: 608.782.1610  
Fax: 608.796.1020  
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e-mail:  
(warranty work)  
(information on other products)  
web:  
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.  
FCC ID: OMO-01RX (Receiver), OMO-01TX (sensor)  
Freq. 433.92 MHz  
La Crosse Technology  
Made in China  
WS-7394U  
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.  
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