La Crosse Technology WS-7394U User Manual

WS-7394U

Wireless 433 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

2

INVENTORY OF CONTENTS

1. WS-7394U—indoor weather station

2. TX6U—remote temperature

(temperature/humidity) 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
http://www.boulder.nist.gov/timefreq/stations/wwvb.htm

3

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 m i nut e s.

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.

4

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 and Humidity 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. 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.

Battery
Cover

5

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 m inutes of good
reception to successfully capture the signal and set to the correct
hour, minute, second, month, day and year. If the signal recep tion
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.

6

III. Explanation of LCD Information

(Up

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

Forecast Icon

Barometric Air
Pressure

12-hour Air
Pressure History

Outdoor Temperature
Display

Remote Sensor Number

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.

7

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
indoor weather center. Complete programming is usually don e fo r 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 “C H”
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.

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

setting and continue to the Time Zone setting.

8