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

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

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

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

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

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.

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.

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)

Radio-controlled time

Remote Sensor Number (Up to 3 Total

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