La Crosse Technology Tomorrow's Weather Today WS-7394U-IT User manual

WS-7394U-IT
Wireless 915 MHz
Wireless Weather Station
Instruction Manual

2
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 19-20
Maintenance and Care 20
Troubleshooting Guide 21
Specifications 22
Warranty Information 23-24

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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
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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Figure 1
Figure 2
Mounting
Bracket TX29U-IT remote
temperature sensor

4
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
Wireless Weather Station and remote temperature sensor 3 to 5
feet apart.
2. Batteries should be out of both units for 10 minutes.
3. Place the batteries into the remote temperature sensor first then
Wireless
Weather Station
.
(All remote temperature sensors must be started before the
Wireless Weather
Station
)
4. DO NOT PRESS ANY BUTTONS FOR 15 MINUTES.
In this time the
Wireless Weather Station and remote temperature sensor will start to
talk to each other and the display will show both the indoor temperature and humidity, and
an outdoor temperature. If the
Wireless Weather Station does not display both
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
Wireless Weather Station with a 330 feet range is mounted on an interior
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.

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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

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*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.
Sensor signal
reception icon*

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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.
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
)
Satellite icon (indicates
outdoor transmission)

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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 program 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 11. °F/°C 12. inHg/hPa
13. Relative pressure
setting 14. Forecast 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.

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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-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.