La Crosse Technology TX38U-IT

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TXTX

TX38U-IT

38U-IT38U-IT

38U-IT Wireless

Wireless Wireless

Wireless 915

915915

915 MHz Temperature

MHz Temperature MHz Temperature

MHz Temperature

transmitter

transmittertransmitter

transmitter

The TX38U-IT temperature transmitter measures the outdoor temperature and

transfers the data to the temperature station.

INVENTORY OF CONTENTS

INVENTORY OF CONTENTSINVENTORY OF CONTENTS

INVENTORY OF CONTENTS

1. One TX38U-IT Temperature transmitter

2. Mounting hardware

3. Instruction manual and warranty card.

ADDITIONAL EQUIPMENT (not included)

• Two fresh AAA, IEC LR3, 1.5V Alkaline batteries.

• Important Notes on Set-up and Operation The Temperature transmitter

should be placed in a dry, shaded area. Avoid direct sun, as that will cause

incorrect readings.

• Fog and mist will not harm your Temperature transmitter but direct rain

must be avoided.

The temperature sensor has a range of 330 feet (100 m). 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/ temperature station with a 330 feet (100 m)

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 (3 m) width of the

room between the 2 walls. The first wall will reduce the range to 165 feet

(50 m), and the second wall will reduce the range to 87 feet (26.5 m).

Factoring in the 10 foot room, this leaves a maximum of 77 feet (23.5 m) 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.

• The Temperature transmitter transmits a signal about every 4 seconds.

After the batteries have been installed, the indoor temperature station will

search for the signal for a duration of few minutes. If there is no

temperature reading in the OUTDOOR LCD after 5 minutes, user shall

make sure the units are within range of each other, or repeat the battery

installation procedure.

• If a button is pressed before the indoor temperature station receives the

signal from the Temperature transmitter, you will need to follow the battery

installation procedure again.

SETTING UP

SETTING UPSETTING UP

SETTING UP

When one transmitter is to be used

1. First, insert the batteries to the temperature transmitter (see “Battery

Installation” below).

2. Within 2 minutes of powering up the transmitter, insert the batteries to the

Temperature Station (see “Battery Installation” below). Once the

batteries are in place, all segments of the LCD will light up briefly.

Following the indoor temperature 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 Temperature Station will start

receiving data signal from the transmitter. The outdoor temperature

should then be displayed on the Temperature station. If this does not

happen after 5 minutes, the batteries will need to be removed from both

units and reset from step 1.

4. In order to ensure sufficient 915 MHz transmission however, this should

under good conditions be a distance no more than 330 feet (100 meters)

between the final position of the Temperature Station and the transmitter

Adding additional remote transmitter (using more than 1 transmitter)

1. User shall remove all the batteries from the temperature station and

transmitters and wait 60 seconds if setting has been done with one

transmitter before.

2. Insert the batteries to the first transmitter.

3. Within 2 minutes of powering up the first transmitter, insert the batteries

to the Temperature Station. Once the batteries are in place, all segments

of the LCD will light up briefly. Following the indoor temperature 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 transmitter (channel 1) should

then be displayed on the Temperature station. Also, the signal reception

icon will be displayed. If this does not happen after 5 minutes, the

batteries will need to be removed from both units and reset from step 1.

5. Insert the batteries to the second transmitter as soon as the outdoor

temperature readings from the first transmitter are displayed on the

temperature station.

Note:

User shall insert the batteries into the second transmitter within 45 seconds of

reception of the first transmitter.

6. The outdoor temperature from the second transmitter and the "channel 2"

icon should then be displayed on the Temperature station. If this does not

happen after 5 minute, the batteries will need to be removed from all the

units and reset from step 1.

7. Insert the batteries to the third transmitter as soon as the "channel 2" icon

and outdoor data are displayed on the temperature station. Then within 5

minutes, the channel 3 outdoor data from the third transmitter will be

displayed and the channel icon will shift back to "1" once the third

transmitter is successfully received. If this is not happen, user shall

restart the setting up from step 1.

Note: User shall insert the batteries into the third transmitter within 45 seconds

of reception of the second transmitter.

8. In order to ensure sufficient 915 MHz transmission however, this should

under good conditions be a distance no more than 330 feet (100 m)

between the final position of the Temperature Station and the transmitter

MPORTANT:

Transmission problems will arise if the setting for additional sensors is 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.

BATTERY INSTALLATION

ATTERY INSTALLATIONATTERY INSTALLATION

ATTERY INSTALLATION

Temperature Station

1. Lift up the battery compartment cover.

2. Observing the correct polarity install 2 AA, IEC LR6, 1.5V batteries.

The batteries will fit tightly (to avoid start-up problems make sure they do

not spring free).

3. Replace compartment cover.

Remote Temperature transmitter

1. Remove the battery cover by sliding the cover down.

2. Observing the correct polarity install 2 AAA, IEC LR3, 1.5V batteries. The

batteries will fit tightly (to avoid start-up problems make sure they do not

spring free).

3. Replace the battery cover by sliding upwards. Be sure battery cover is on

securely.

Note:

• If the signal reception is not successful on the first frequency of 915MHz

for 45 seconds, the frequency is changed to 920MHz and the learning is

tried for another 45 seconds. If it is still not successful the reception is

tried for 45 seconds on 910MHz. This will also be done during re-

synchronization.

• Detailed Set up procedures of the Temperature Station and the

Transmitter refer to the main operation manual of Temperature Station.

MOUNTING

MOUNTINGMOUNTING

MOUNTING

THE TEMPERATURE TRANSMITTER

The Temperature transmitter can be mounted onto a wall with the use of screws

MOUNTING WITH SCREWS

1. Remove the mounting bracket from the Temperature transmitter.

2. Place the mounting bracket over the desired location.

3. Through the two screw holes of the bracket, mark the mounting surface

with a pencil.

4. Screw mounting bracket onto the mounting surface. Ensure that the

screws are tight against the bracket.

5. Insert the Temperature transmitter into the bracket.

Need help?

Do you have a question about the La Crosse Technology TX38U-IT and is the answer not in the manual?

The TX38U-IT Wireless 915 MHz Temperature transmitter is a device designed to measure outdoor temperature and transmit this data wirelessly to a compatible temperature station.

Function Description:

The primary function of the TX38U-IT is to collect outdoor temperature readings and send them to a temperature station. It operates on a 915 MHz frequency. The device is intended for use in conjunction with a temperature station, which then displays the received temperature data.

Important Technical Specifications:

Outdoor Temperature Measuring Range: -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" is displayed if the temperature falls outside this range.
Transmission Range: Up to 330 feet (100 m) in open space. This range can be significantly reduced by obstructions such as walls, roofs, floors, ceilings, and thick trees. Metal siding, stucco, and certain types of glass can further reduce the signal range.
Power Supply: 2 x AAA, IEC LR3, 1.5V alkaline batteries.
Battery Life Cycle: Approximately 24 months.
Dimensions (H x W x D): 1.27" x 0.55" x 3.40" (32.4 x 14.1 x 86.5 mm).
Transmission Frequency: The transmitter primarily uses 915MHz. If initial reception is unsuccessful for 45 seconds, it attempts to switch to 920MHz for another 45 seconds, and then to 910MHz for 45 seconds if still unsuccessful. This frequency switching also occurs during re-synchronization.
FCC ID: OMO-M-01.

Usage Features:

Setup:
- Single Transmitter: Insert batteries into the transmitter first, then into the temperature station within 2 minutes. The outdoor temperature should display on the station within 5 minutes. If not, reset both units.
- Multiple Transmitters: For additional transmitters, all batteries must be removed from the temperature station and existing transmitters. Insert batteries into the first transmitter, then the temperature station, waiting 60 seconds between each step. Once the first transmitter's data is displayed, insert batteries into the second transmitter within 45 seconds. Repeat for a third transmitter. Transmission problems may arise if the setup procedure is not followed precisely, requiring a full reset.
Placement: The transmitter should be placed in a dry, shaded area to avoid direct sunlight, which can cause incorrect readings. While fog and mist are acceptable, direct rain must be avoided.
Signal Reception: The transmitter sends a signal approximately every 4 seconds. If no outdoor temperature reading appears on the station's LCD after 5 minutes, users should ensure units are within range or repeat the battery installation.
Mounting: The transmitter can be mounted onto a wall using screws. It includes a mounting bracket that detaches from the main unit. The bracket is screwed to the desired surface, and then the transmitter is inserted into the bracket. Alternatively, with the mounting bracket installed at the bottom, the transmitter can be placed on any flat surface.
Pre-Installation Check: Before permanently fixing the sensor, it is recommended to place all units in their desired locations to verify signal reception. If the signal is not received, the sensor should be relocated or slightly moved to improve reception.

Maintenance Features:

Cleaning: Displays and units should be cleaned with a soft, damp cloth. Solvents or scouring agents should not be used as they may damage the surfaces.
Water Exposure: The unit should not be submerged in water.
Battery Replacement: Immediately remove all low-powered batteries to prevent leakage and damage.
Repairs: Opening the casings invalidates the warranty. Users should not attempt to repair the unit themselves but should contact La Crosse Technology for repairs.

Warranty Information:

La Crosse Technology, Ltd provides a 1-year limited warranty against manufacturing defects in materials and workmanship for products purchased and used in North America. The warranty covers repair or replacement of defective parts or products at no charge. It does not cover damage from accidents, unreasonable use, neglect, shipping, alterations, or use outside of intended home applications. The warranty also does not cover installation costs or signal reception issues due to interference.