Oregon Scientific Home Safety Product THGR 238 NF User Manual

ADDITIONAL RESOURCES  
TABLE OF CONTENTS  
more about your new product and other Oregon  
Scientific products such as digital cameras, hand-  
held organizers, health and fitness gear, and weather  
stations. The website also includes contact  
information for our customer service department, in  
case you need to reach us.  
Additional resources ........................................... 1  
About this guide .................................................. 2  
Product overview ................................................ 3  
Getting started .................................................... 4  
Set up.............................................................. 4  
Change channel .............................................. 6  
Low battery warning ........................................ 6  
Reset system ...................................................... 6  
Safety and care ................................................... 7  
Warnings ............................................................. 7  
Troubleshooting .................................................. 8  
Specifications ...................................................... 9  
1
 
DESCRIPTIONS  
PRODUCT OVERVIEW  
1. Temperature display  
2. LED indicator  
1
2
3
4
5
6
3. °C / °F switch  
4. Reset button  
5. Channel switch  
6. Battery compartment  
7. Battery compartment lid  
8. Wall mount  
7
8
3
 
SET UP  
GETTING STARTED  
1. Place remote unit as close as possible to the  
main unit.  
This product can be used with up to 2 remote units  
to transmit outdoor temperature and humidity data  
to a main (indoor) unit. The measurement unit (°C  
or °F) and channel number (1, 2, or 3) switches are  
located in the battery compartment, and should be  
set prior to installation.  
2. Remove the battery compartment lid. (You will  
need a small Phillips screwdriver.)  
3. Assign a Channel Number. If  
1
2
3
you are using more than one  
remote unit, select a different  
channel number for each unit.  
RESET  
CHANNEL  
NOTE  
Additional remote units sold separately.  
4. Set the measurement unit.  
5. Insert the batteries. Match  
1
2
3
RESET  
CHANNEL  
the polarity, as shown in the battery  
4
 
compartment.  
Do not place the remote  
unit more than 20 – 30 meters (60 – 90 feet)  
from the main (indoor) unit.  
6. Press RESET with the point of a blunt object  
(such as a ball point pen).  
Position the unit so that it faces the main  
(indoor) unit. Minimize obstructions such as  
doors, walls, and furniture.  
7. Replace the battery compartment lid. Secure.  
8. Mount the remote unit on a flat surface using  
the recess holes on the back of the mounting  
unit. Insert the sensor into the mounting unit,and  
You may need to experiment with various  
locations to get the best reception.  
gently push down to secure. For best results:  
Place the unit out of  
direct sunlight and  
moisture.  
9. Once the batteries are in place, the sensor will  
transmit signals every 40 seconds.The readings  
shown on the main unit depend on which remote  
5
 
sensor (1, 2, or 3) is selected. Refer to the main  
unit User Manual for more information.  
NOTE  
Do not use rechargeable batteries. Properly  
dispose used batteries by taking them to an  
authorized disposal station.  
CHANGE CHANNEL  
Repeat the Set Up procedure (4). In Step 3, select  
a different Channel Number.  
RESET SYSTEM  
The RESET button is located in the battery  
compartment. Press it with the point of a blunt object  
(such as a ball point pen) whenever you change the  
batteries, or whenever performance is not behaving  
as expected (e.g., unable to establish radio  
frequency link with main unit). Refer to the User  
Manual for the main unit for more information.  
LOW BATTERY WARNING  
Replace the batteries whenever the low battery signal  
(
) shows on the remote unit, or on the remote unit  
area of the main unit.  
6
 
electrical shock and damage the unit.  
SAFETY AND CARE  
Do not subject the main unit to extreme force,  
shock, or fluctuations in temperature or humidity.  
Wash the unit with a slightly damp cloth and mild  
detergent. Avoid dropping the unit or placing it in a  
high-traffic location.  
Do not tamper with the internal components.  
Do not mix new and old batteries or batteries of  
different types. Do not use rechargeable batteries  
with this product.  
Do not expose the unit to direct sunlight since this  
may affect the accuracy of measurements.  
Remove the batteries if storing this product for a  
long period of time.  
WARNINGS  
Do not scratch the LCD display.  
This product is designed to give you years of service  
if handled properly. Observe the following guidelines:  
Do not make any changes or modifications to  
this product. Unauthorized changes may void  
your right to use the product.  
Never immerse the unit in water. This can cause  
7
 
The contents of this user manual are subject to  
change without notice.  
Problem  
Symptom  
Remedy  
Temp  
Main unit  
shows  
Temperature is  
out-of-range.  
Images not drawn to scale.  
“LLL” or “HHH”  
Remote  
unit  
Cannot  
Check batteries  
TROUBLESHOOTING  
locate main  
unit  
(6)  
Check here before contacting our customer service  
department.  
Check location  
(5)  
8
 
Relative humidity  
Range  
Resolution  
SPECIFICATIONS  
25% to 95%  
1%  
Dimensions  
L x W x H  
105 x 70 x 21 mm  
(4.2 x 2.8 x 0.84 inches)  
80.5 grams  
Frequency  
RF frequency  
Range  
433 MHz  
30 meters (98 feet) with no  
obstructions  
Weight  
(without batteries)  
Transmission  
every 40 seconds  
Temperature  
Unit  
Range  
°C or °F  
Channel No.  
Unit  
Power  
1, 2, or 3  
°C or °F  
2 x UM-3 (AA) 1.5V  
alkaline batteries  
-20 °C to 60 °C  
(-4 °F to 140 °F)  
0.1 °C (0.2 °F)  
Resolution  
9
 
FCC :  
NOTE ON COMPLIANCE  
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.  
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 operations.  
WARNING Changes or modifications to this unit not expressly  
approved by the party responsible for compliance could void the  
user’s authority to operate the equipment.  
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:  
10  
 
Reorient or relocate the receiving antenna.  
CAUTION  
Increase the separation between the equipment and receiver.  
— The content of this manual is subject to change without  
further notice.  
Connect the equipment into an outlet on a circuit different  
from that to which the receiver is connected.  
— Due to printing limitation, the displays shown in this  
manual may differ from the actual display.  
Consult the dealer of an experienced radio/TV technician for help.  
— The contents of this manual may not be reproduced  
without the permission of the manufacturer.  
Company Name : Oregon Scientific, Inc.  
Address : 19861 SW 95th Place, Tualatin, Oregon 97062, USA  
Telephone Number : 1-800-853-8883  
Name and model number of the product : Wireless Remote  
Thermo-Hygro Sensor THGR 238 NF  
©2003.Oregon Scientific.All rights reserved.  
11  
 
Wireless Remote Thermo-Hygro Sensor  
(Model #: THGR 238 NF)  
User Manual  
 

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