INTRODUCTION
Congratulations on your purchase of the THR138 Remote
Thermo Sensor. This Remote Thermo Sensor is for use with
the 433 MHz Multi-Channel In-Out Thermometer to monitor
temperature changes of outdoor sites. Operation is easy and
no wire installation is required.
COMPATIBLE UNITS
Examples of compatible units are as follows:
•
EMR812A
•
BAR888A
•
RMR112A
MAIN FEATURES
A. LCD
Displays the current temperature monitored by the remote
unit
B. LED INDICATOR
Flashes when the remote unit transmits a reading
C.
ºC / ºF
SLIDE SWITCH
Selects between Centigrade (ºC) and Fahrenheit (ºF)
D.
CHANNEL
SLIDE SWITCH
Designates the remote unit Channel 1, Channel 2 or
Channel 3
E.
RESET
BUTTON
Returns all settings to default values
F. BATTERY COMPARTMENT
Accommodates two UM-3 AA size alkaline batteries
G. BATTERY DOOR
H. WALL-MOUNT HOLDER
Supports the remote unit in wall-mounting
I.
REMOVABLE TABLE STAND
For standing the remote unit on a flat surface
BEFORE YOU BEGIN
To ensure proper reception between the main unit and the
remote sensor, follow these instructions carefully.
Battery and channel installation
1. Place both units as close as possible to each other.
2. Assign a different channel to each remote sensor by
changing the channel switch in the battery compartment
of the remote sensor.
3. Select the units of measurement for the temperature
display on the ºC / ºF slide switch.
4. Install 2 alkaline batteries (UM-3 or “AA” size 1.5V) strictly
according to the polarities shown.
5. Insert batteries or press the reset button of the main unit.
Follow the instructions as set out in the user’s manual.
6. Position the remote sensor and main unit within effective
transmission range, which in usual circumstances, is 98
feet (30 meters).
NOTE
The effective range may be limited by building
materials and the position of either the main unit or remote
sensors. Try various set-up arrangements for best result.
Though the sensor is weatherproof, and is meant for use
outside, it should be placed away from direct sunlight, rain,
or snow.
Standard Alkaline batteries contain signifcant amounts of
water. Because of this they will freeze in low temperatures
of approximately 10ºF (-12ºC). Disposable Lithium batteries
have a much lower threshold for temperature with an
estimated freezing range of below -40ºF (-40ºC). The Liquid
Crystal Display in outdoor thermometers will remain
operational to -20ºF (-29ºC) with adequate power.
Wireless ranges can be impacted by a variety of factors such
as extremely cold temperatures. Extreme cold may
temporarily reduce the effective range between the sensor
and the base station. If the unit’s performance fails due to
low temperature, the unit will resume proper functioning as
the temperature rises to within the normal temperature range
(i.e no permanent damage will occur to the unit due to low
temperatures).
CHANGING CHANNELS
Once a channel is assigned to a unit, you can only change it
by removing the batteries and repeating the above procedure.
REMOTE THERMO SENSOR
WITH LCD
MODEL: THR138
User Manual
LOW-BATTERY WARNING
Replace the batteries of the sensor when the low-battery
indicator of the channel represented by the sensor lights up
on the main unit.
OPERATION
Once batteries are in place, the sensor will start transmitting
samplings at 30-second intervals.
The remote sensor reading shown on the LCD depends on
which remote sensor channel has been chosen.
HOW TO RESET THE UNIT
The reset function is required only when the unit is operating
in an unfavorable way or malfunctioning.
To access:
1. Lift open the battery compartment door.
2. Place a blunt stylus into the hole marked
RESET
and press.
3. Replace the battery compartment door.
See the user’s manual of your main unit for further
information.
HOW TO USE THE TABLE STAND OR WALL MOUNT
This sensor comes with a wall-mount holder and a
removable stand. Use either to hold the unit in place.
(
FIG A
)
PRECAUTIONS
This product is engineered to give you years of satisfactory
service if you handle it carefully. Here are a few precautions.
1. Do not immerse the unit in water.
2. Do not clean the unit with abrasive or corrosive materials.
They may scratch the plastic parts and corrode the
electronic circuit.
3. Do not subject the unit to excessive force, shock, dust,
temperature or humidity. Which may result in malfunction,
shorter electronic life span, damaged battery and
distorted parts.
4. Do not tamper with the unit’s internal components. Doing
so will invalidate the warranty on the unit and may cause
unnecessary damage. The unit contains no user-
serviceable parts.
5. Only use fresh batteries as specified in the user’s manual.
Do not mix old and new batteries. Do not mix alkaline,
standard (carbon-zinc), or rechargeable (nickel-
cadmium) batteries.
6. Always read the user’s manual thoroughly before
operating the unit.
TROUBLESHOOTING
PROBLEM
SYMPTOM
REMEDY
Remote sensor Cannot locate
Check batteries
remote sensor
Check location
Cannot change
Check all
channel
sensors for proper
operation
Data does not
Initiate a manual
match main unit
sensor search
SPECIFICATIONS
Temperature Measurement
Displayed range :
-50.0ºC to + 70.0ºC
(-58.0ºF to 158.0ºF)
Proposed operating range :
-22.0ºF to +140.0ºF
(-30.0ºC to +60.0ºC)
Temperature resolution :
0.1ºC (0.2ºF)
RF transmission frequency :
433 MHz
No. of remote unit :
maximum of 3
RF transmission range :
maximum of 98 ft (30 m)
Temperature sensing cycle :
around 30 seconds
Power
:
use 2pcs UM-3 “AA” 1.5V
alkaline batteries
Weight
:
3 oz (83 g) (without
batteries)
Dimension
:
4 x 2.8 x 0.9 in
(105 x 70 x 22.5 mm)
(H x W x D)
CAUTION
•
The content of this manual is subject to change
without further notice.
•
Due to printing limitations, the displays shown
in this manual may differ from the actual display.
•
The manufacturer and its suppliers hold no
responsibility to you or any other person for any
damage expenses, lost profits, or any other
claim as a result of using this product.
•
The contents of this manual may not be
reproduced without the permission of the
manufacturer.
ABOUT OREGON SCIENTIFIC
Visit our website (www.oregonscientific.com) to learn more
about Oregon Scientific products such as digital cameras;
MP3 players; children’s electronic learning products and
games; projection clocks; health and fitness gear; weather
stations; and digital and conference phones. The website
also includes contact information for our Customer Care
department in case you need to reach us, as well as
frequently asked questions and customer downloads.
We hope you will find all the information you need on our
website, however if you’re in the US and would like to contact
the Oregon Scientific Customer Care department directly,
please visit:
www2.oregonscientific.com/service/default.asp
OR
Call 1-800-853-8883.
For international inquiries, please visit:
www2.oregonscientific.com/about/international.asp
FCC STATEMENT
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 operation.
WARNING
Changes or modifications not expressly approved
by the party responsible for compliance could void the user's
authority to operate the equipment.
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. 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:
•
Reorient or relocate the receiving antenna.
•
Increase the separation between the equipment and
receiver.
•
Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
•
Consult the dealer or an experienced radio / TV
technician for help.
DECLARATION OF CONFORMITY
The following information is not to be used as contact for
support or sales. Please call our customer service number
(listed on our website at www.oregonscientific.com), or on
the warranty card for this product) for all inquiries instead.
We
Name:
Oregon Scientific, Inc.
Address:
19861 SW 95th Ave., Tualatin,
Oregon 97062 USA
Telephone No.:
1-800-853-8883
EN
© 2006 Oregon Scientific. All rights reserved
.
declare that the product
Product No.:
THR138
Product Name:
Remote Sensor
Manufacturer:
IDT Technology Limited
Address:
Block C, 9/F, Kaiser Estate,
Phase 1,41 Man Yue St.,
Hung Hom, Kowloon,
Hong Kong
is in conformity with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: 1) This device may
not cause harmful interference. 2) This device must accept
any interference received, including interference that may
cause undesired operation.
C
E
D
F
[ FIG A ]
A
-3
1
.5
V
A
A
A
/
A
U
M-
3
1
.5
V
THR138R_EN-SP_op05122.p65
12/22/05, 5:33 PM
2