La Crosse Technology WS-7394U-IT User Manual

WS-7394U-IT

Wireless 915 MHz

Wireless Weather Station

Instruction Manual

TABLE OF CONTENTS

Topic Page

Inventory of Contents/ Additional Equipment 3
About WWVB 3
Quick Set Up Guide 4

Detailed Set Up Guide

Battery Installation 5
Start Up Sequence 6
Explanation of LCD Information 7
Function Key Layout 8
Program Mode
Overview of Programming Sequence 8
LCD Contrast Setting 8
Time Zone Setting 9
DST ON/OFF Setting 9
Radio-controlled Time ON/OFF Setting 9-10
12/24-hour Time Mode Setting 10
Setting the Time/Date Manually 10-11
Temperature Measuring Units (ºF/ºC) 12
Air Pressure Measuring Units (inHg/hPa) 12
Relative Pressure Setting 12

Forecast Sensitivity Setting 13
Features and Operation

Minimum/Maximum Temperature/Humidity 14
Multiple Remote Temperature/Humidity Sensors 15-16
Comfort Icon 16
Weather Forecast and Pressure Trend Indicators 16
Weather Icons 16-17
Weather Tendency Arrows 17
Barometric Air Pressure Reading 17
Air Pressure History Bar Chart 17-18

Mounting
Maintenance and Care
Troubleshooting Guide
Specifications
Warranty Information

19-20

20
21
22

23-24

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This product offers:

INSTANT TRANSMISSION is the state­of-the-art new wireless transmission
technology, exclusively designed and
developed by LA CROSSE
TECHNOLOGY. INSTANT
TRANSMISSION offers you an
immediate update (every 4 seconds!) of
all your outdoor data measured from
the sensors: follow your climatic
variations in real-time!

INVENTORY OF CONTENTS

1. WS-7394U-IT— Wireless Weather Station (Figure 1)

2. TX29U-IT—remote temperature sensor (figure 2)

3. Instruction manual and warranty card

Mounting
Bracket

TX29U-IT remote
temperature sensor

Figure 2

Figure 1

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

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antenna in the Wireless Weather Station. However, due to the nature of the
Earth’s Ionosphere, reception is very limited during daylight hours. The
Wireless 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
http://www.boulder.nist.gov/timefreq/stations/wwvb.htm

QUICK SET-UP GUIDE

Hint: Use good quality Alkaline Batteries and avoid rechargeable batteries.

1. Have the
feet apart.

2. Batteries should be out of both units for 10 minutes.

3. Place the batteries into the remote temperature sensor first then

Weather Station

(All remote temperature sensors must be started before the

Station

4. DO NOT PRESS ANY BUTTONS FOR 15 MINUTES.

In this time the
talk to each other and the display will show both the indoor temperature and humidity, and

an outdoor temperature. If the
temperatures after the 15 minutes please retry the set up as stated above. After both
indoor and outdoor temperatures are displayed for 15 minutes you can place your remote
temperature sensor outdoor and set your time.

The remote temperature sensor should be placed in a dry, shaded area. The temperature
sensor has a range of 330 feet. Keep in mind that the 330 feet is in open air with no
obstructions and that radio waves DO NOT curve around objects. Actual transmission
range will vary depending on what is in the path of the signal. Each obstruction (roof, walls,
floors, ceilings, thick trees, etc.) will effectively cut signal range in half.

Example: A
wall, so that the signal has to pass through one interior wall, one exterior wall, and across
the 10 feet width of the room between the 2 walls. The first wall will reduce the range to
165 feet, and the second wall will reduce the range to 87 feet. Factoring in the 10 foot
room, this leaves a maximum of 77 feet 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.

Wireless Weather Station

.

)

Wireless Weather Station

Wireless Weather Station

Wireless Weather Station

and remote temperature sensor 3 to 5

Wireless

Wireless Weather

and remote temperature sensor will start to

does not display both

with a 330 feet range is mounted on an interior

4

DETAILED SET-UP GUIDE

I. BATTERY INSTALLATION (When one temperature sensor is being used)

1. First, insert the batteries to the temperature sensor (see “A. Remote
Temperature Sensor” below).

2. Within 2 minutes of powering up the sensor, insert the batteries to the Weather
Station (see “B. Wireless Weather Station” below). Once the batteries are in
place, all segments of the LCD will light up briefly. Following the indoor
temperature and humidity, and the time as 12:00 will be displayed. If they are not
shown in LCD after 60 seconds, remove the batteries and wait for at least 60
seconds before reinserting them. Once the indoor data is displayed user may
proceed to the next step.

3. After the batteries are inserted, the Weather Station will start receiving data
signal from the sensor. The outdoor temperature should then be displayed on the
Weather Station. If this does not happen after 2 minutes, the batteries will need
to be removed from both units and reset from step 1 and the signal reception
icon is no longer shown.

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

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. Replace the battery cover by sliding upwards. Be sure battery

cover is on securely.

B. Wireless 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 TX29U-IT sensor, no data will be received from that
sensor until reset.

4. Replace the battery cover.

Battery
Cover

5

Sensor signal
reception icon*

* When the signal is successfully received by the Weather Station, the icon will
be switched on. (If not successful, the icon will not be shown in LCD) So the user
can easily see whether the last reception was successful (icon on) or not (icon
off). On the other hand, the short blinking of the icon shows that a reception is
being done now.

• If the signal reception is not successful on the first frequency (915MHz) for 45
seconds, the frequency is changed to 920MHz and the learning is tried another
45 seconds. If still not successful the reception is tried for 45 seconds on
910MHz. This will also be done for re-synchronization.

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 “SA.1” as the default date (2006 as the year).

3. The indoor temperature and humidity, and barometric air pressure

(as 29.92 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 Wireless 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 Wireless 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. Next reception will take place the next
day.

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 Wireless Weather Station n 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.

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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 Wireless 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. After a successful reception, no more
reception attempt would be made until the following day.

III. Explanation of LCD Information

A. The below picture highlights the LCD features.

WWVB Reception
Indicator

Date Display

Comfort Icon
Indoor Temperature

Humidity Display

Air Pressure Trend

Forecast Icon

Barometric Air
Pressure

12-hour Air
Pressure History

Outdoor Temperature
Display

Satellite icon (indicates
outdoor transmission)

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Radio-controlled time

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.

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 p rog ram the
Wireless Weather Station. 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 2. Time Zone 3. DST ON/OFF

4. Radio-controlled

Time ON/OFF

5. 12/24-hour

time mode

6. Hour

7. Minute 8. Year 9. Month

10. Date

13. Relative pressure

setting

11. °F/°C

14. Forecast

sensitivity

12. inHg/hPa

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.

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4. Press and release the “SET” button to confirm the LCD contrast

setting and continue to the Time Zone setting.

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.

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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.

6. Press and release the “SET” button to confirm the radio-controlled

time ON/OFF setting and continue to the 12/24-hou r 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 12/24­hour 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.

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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.

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.

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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.

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.

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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 relative air pressure value.

6. Press and release the “SET” button to confirm the relative pressure

setting and continue to the Forecast Sensitivity setting.

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 humi dity. 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 temperat ure 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 temperatur e
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 t emperature. 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).

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To reset th e outdoor minimum and maximum temperature,

Note:

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 corresponding time.

B. Multiple Remote Temperature Sensors

The WS-7394U-IT is able to receive signals from 2 additional temperature
sensors. The following are instructions for the set-up of temperature sensor units
with the WS-7394U-IT. These extra sensors can be purchased through the same
dealer as this unit.

1. Remove all the batteries from the receiver and sensor(s) and wait 60
seconds. During these 60 seconds, press any button 20 times to discharge
any excess power.

2. Insert the batteries to the first temperature sensor.

3. Within 2 minutes of powering up the first sensor, insert the batteries to the
Weather Station. Once the batteries are in place, all segments of the LCD
will light up briefly. Following the indoor temperature and humidity, and the
time as 12:00 will be displayed. If they are not shown in LCD after 60
seconds, remove the batteries and wait for at least 60 seconds before
reinserting them.

4. The outdoor temperature from the first sensor (channel 1) should then be
displayed on the Weather Station. If this does not happen and the signal
reception icon is not shown, after 2 minutes, the batteries will need to be
removed from both units and reset from step 1.

5. Insert the batteries to the second sensor as soon as the outdoor
temperature readings from the first sensor are displayed on the Weather
Station.

NOTE: You must insert the batteries into the second sensor within 10
seconds of reception of the first sensor.

6. The outdoor temperature from the second sensor and the "channel 2" icon
should then be displayed on the Weather Station. If this does not happen
after 2 minute, the batteries will need to be removed from all the units and
reset from step 1.

7. Insert the batteries to the third sensor as soon as the "channel 2" icon and
outdoor data are displayed on the Weather Station. Then within 2 minutes,
the channel 3 outdoor data from the third sensor will be displayed and the
channel icon will shift back to "1" once the third sensor is successfully

IMPORTANT: Transmission problems will arise if the setting for multiple sensors is

received. If this is not happen, user shall restart the setting up from step 1.

NOTE: You must insert the batteries into the third sensor within 10
seconds of reception of the second sensor.

not followed as described above. Should transmission problems occur, it is
necessary to remove the batteries from all units and start again the set-up from
step 1.

C. 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.

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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 t emperature readings press

and hold the “SET” button for 3 seconds and that temperature
record for that remote sensor will be reset only.

Each remote sensor will have its own minimum and maximum values
stored.

D. 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 65%.

3. A “sad-face” will be displayed when the temperature and humidity
are outside the mentioned ranges.

E. 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 WS­7394U-IT 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

There are 3 possible weather icons that will be displayed at various
times in the center of the indoor weather station.

a. Sunny—indicates that the weather is expected to improve

(not that the weather will be sunny).

b. Sun with Clouds—indicates that the weather is expected to

be fair (not that the weather will be sunny with clouds).

c. Clouds with Rain—indicates that the weather is expected

to get worse (not that the weather will be rainy).

1. The weather icons change when the unit detects a change in air
pressure.

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2. The icons change in order, from “sunny” to “sun with clouds” to
“clouds with rain” or the reverse.

3. It will not change from “sunny” directly to “clouds with rain”,
although it is possible for the change to occur quickly.

4. If the symbols do not change, the weather has not changed (or the
change has been slow and gradual).

5. The sensitivity of the change in foreacst icon is set by the user in
section F of the Detailed Set Up Guide.

F. Weather Tendency Arrows

1. Along with the forecast icon there

Pressure trend
arrow

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 r emain
poor.

G. 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.

H. Air Pressure History Bar Chart

1. The bar chart indicates the air pressure history trend over the last
12 hours in 5 steps, 0h, -3h, -6h, -9h, and -12h.

2. The “0h” represents the current full hour air pressure recording.

3. The columns represent the “hPa” (0, ±2, ±4) at specific time.

4. The “0” in the middle of this scale is equal to the current pressure
and each change (±2, ±4) represents how high or low in “hPa“ the
past pressure was compared to the current pressure.

5. If the bars are rising, the weather is getting better due to the
increase of air pressure.

6.

If the bars go down, the air pressure has dropped and the weather is
expected to get worse from the present time “0h“.

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Note:

For accurate barometric pressure trends, the Weather Station should operate at
the same altitude for example, it should not be moved from the ground to the
second floor of the house. Should the unit be moved to a new location, discard
readings for the next 48-60 hours.

This feature cannot be turned off.

VII. MOUNTING

Note:

Before permanently mounting, ensure that the Wireless 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
330-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 Wireless 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. In sert the remote temperature sensor into the bracket.

2. MOUNTING WITH ADHESIVE TAPE

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a. W ith 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. A dhere 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. Po sition the remote temperature sensor in the desired

location, ensuring that the Wireless Weather Station
can receive the signal.

Note: Mounting with adhesive tape is not recommended as a permanent
mounting solution. Only use the adhesive tape during set-up process.

B. Mounting the WS-7394U-IT Wireless Weather Station

The Wireless 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.

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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.

TROUBLESHOOTING

Problem:
Solution:

The LCD is faint.

1) Set the LCD contrast to a higher level.

2) Replace batteries.

Problem:
Solution:

No outdoor temperature is displayed.

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:
Solution:

Temperature, humidity, or air pressure is incorrect.

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:
Solution:
Problem:
Solution:

“- -” in humidity display.

1) Humidity is below 1%.
WWVB time and date will not set or update

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.

SPECIFICATIONS

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)

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Outdoor

-39.8°F to 139.8°F with 0.2°F resolution
(-39.9°C to 59.9°C with 0.1°C resolution)
(“OFL” displayed if outside this range)

Relative humidity range
Indoor 1% to 99% with 1% resolution

(Display “- -“ if temperature is OL.F;
display “- -“ if < 1% and “99%” if > 99%)

Air pressure
Relative hPa (adjustable) 960 hPa to 1040 hPa
Relative inHg (adjustable) 28.35 inHg to 30.72 inHg
Sensitivity setting hPa 2 hPa to 4 hPa
Air pressure history For the past 12 hours

(0, -3, -6, -9, and -12 hours)

Data checking intervals
Indoor temperature Every 15 second
Indoor humidity Every 20 seconds
Outdoor temperature Every 4 seconds
Sensor reading update (within sensor)
Outdoor temperature Every 4 seconds
Transmission frequency 915 MHz
Transmission range 330 feet max. (100m) in open space

Power supply

Wireless Weather Station

: 2 x AA (IEC LR6) 1.5V batteries.

Remote Temperature Sensor: 2 x AA (IEC LR6) 1.5V batteries.

Dimensions (H x W x D)

Wireless Weather Station

Remote Temperature Sensor

8.75” x 4” x 1.5” ( 2 22 x 102 x 38 mm)

5.05 x 1.50 x 0.83 inches (128.3 x 38.2 x 21.2 mm)

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

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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: [phone]

Fax: [phone]

e-mail:

[e-mail]

(warranty work)

[e-mail]

(information on other products)

web:

www.lacrossetechnology.com

Questions? Instructions? Please visit:
www.lacrossetechnology.com/7394it

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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FCC ID: OMOTX29U (sensor)
RF Exposure mobile:

The internal / external antennas used for this mobile sensor must provide a separation
distance of at least 20 cm (8 inches) from all persons and must not be co-located or
operating in conjunction with any other antenna or sensor."

Statement according to FCC part 15.19:

This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation.

Statement according to FCC part 15.21:

Modifications not expressly approved by this company could void the user's authority to
operate the equipment.

Statement according to FCC part 15.105:
NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications.
However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:

•

Reorient or relocate the receiving antenna.

•

Increase the separation between the equipment and receiver.

•

Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.

Consult the dealer or an experienced radio/TV technician for help

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