Oregon MTR101 USER MANUAL

MINI REMOTE THERMOMETER

MODEL: MTR101

USER'S MANUAL

INTRODUCTION

Congratulations on your purchasing the MTR101 Mini Remote
Thermometer.

The basic package comes with a main unit and a remote sensor.
The main unit can support up to three remote sensors.

The MTR101 is very easy to use. No wire installation is
required between the main unit and the remote units. As the
MTR101 operates at 433MHz, it can be used in the U.S. and
most places in Continental Europe.

E. [CLEAR] BUTTON

Clears the memory for the indoor temperature and that for
the selected channel

A
B

F

C

G

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MAIN FEATURES

A. OUTDOOR TEMPERATURE

Shows the temperature of the selected remote channel

B. INDOOR TEMPERATURE

Shows the temperature taken indoors

C. [CHANNEL] BUTTON

Selects among different channels

D. [MEM] BUTTON

Displays current, maximum and minimum temperatures

°C

RESET

°F

D

E

J

H

I

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F . RESET BUTTON

Returns all settings to default values

G. °C/°F SLIDE SWITCH

Selects between degrees Centigrade (C) and Fahrenheit
(F)

H. BATTERY COMPARTMENT

Accommodates two (2) UM-3 or “AA” size batteries

I. TABLE STAND

Rotates out to support the unit on a flat surface

J. WALL-MOUNT HOLE

For mounting the unit on a wall

MAIN FEATURES: REMOTE UNIT

A. LED INDICATOR

Flashes when the remote unit transmits a reading

B. CHANNEL SLIDE SWITCH

Designates the remote unit Channel 1, Channel 2 or
Channel 3

C. RESET BUTTON

Returns all settings to default values

D. BATTERY COMPARTMENT

Accommodates two AAA-size batteries

E. BATTERY DOOR

A

HINTS FOR BEST OPERATION

• Assign different channels to different remote units.

• Insert batteries for remote units before doing so for the
main unit.

• Set the main and remote units within range (20 to 30
meters).

2

B
C

D

E

• Try different set-ups for best transmission and reception.

• Position the remote units away from direct sunlight, rain
or snow.

BA TTER Y AND CHANNEL

INSTALLATION: REMOTE UNIT

1. Remove the screws on the battery compartment.

2. Select the channel number on the CHANNEL slide switch.

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BATTERY INSTALLATION: MAIN UNIT

1. Slide open the battery compartment door.

2. Insert two AA-sized batteries.

3. Install 2 alkaline batteries (UM-4 or “AAA” size 1.5V)
strictly according to the polarities shown.

4. Replace the battery compartment door and secure its
screws.

Note that once a channel is assigned to a remote unit, you can
only change it by removing the batteries or resetting the unit.

3. Press RESET.

4. Replace the battery compartment door.

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GETTING STARTED

Once batteries are in place for the remote units, they will start
transmitting samplings roughly at 30-second intervals.

The main unit will also start receiving once batteries are
installed. The temperature of the selected channel will be
displayed on the main display and the indoor temperature on
the secondary display. The main unit will automatically update
its readings at 30-second intervals.

If no signals are received, blanks will be displayed. Press
CHANNEL and MEM simultaneously to enforce an immediate
search. This is useful in synchronizing the transmission and
reception of the remote and main units.

INDOOR AND OUTDOOR

TEMPERA TURES

The indoor temperature is shown on the secondary display.
As for the remote sites or channels, press CHANNEL

repeatedly to go from one channel to another. The kinetic w ave
display on the channel number indicates the reception of that
particular channel is in good order.

Kinetic-wave

Icon

Designated

Display

To start an automatic scan on all channels, press and hold
CHANNEL for two seconds. The main unit will scan from
one channel to another and back. The reading for individual
channel will be displayed for five seconds. Press any key to
end the automatic scan.

The MTR101 is capable of measuring temperatures within the

-50°C (-58°F) and +70°C (+158°F) range. If the temperature
goes above or below that, the display will show "HHH" or
"LLL".

Remote
Display

Channel One

Remote
Display

Channel Two

Remote
Display

Channel Three

MAXIMUM AND MINIMUM

TEMPERA TURES

The maximum and minimum recorded indoor temperatures and
those of each channel will be automatically stored in memory.

To display them,

1. Press [CHANNEL] to locate the desired channel.

2. Press [MEM] repeatedly to display the current, maximum

(MAX) and minimum (MIN) temperatures. The readings
of the indoor temperatures will also be displayed.

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To clear the memory of a particular channel,

1. Press [CHANNEL] to locate the desired channel.

2. Press [CLEAR]. Note it will also erase the memory for
the indoor temperatures. If you press MEM now, the
maximum and minimum temperatures will have the same
values as the current ones until different readings are
recorded.

DISCONNECTED SIGNALS

If without obvious reasons the display for a particular channel
goes blank, press [CHANNEL] and [MEM] to enforce an
immediate search. If that fails, check if the remote unit of that
channel is still in place. Make sure the transmission is within
range and path is clear of obstacles and interference. No reading
will be shown if no remote unit is assigned to that channel.

LOW BATTERY WARNING

When it is time to replace batteries, the respective low-battery
indicator will show up when the respective channel is selected.
The battery level of the main unit will be shown on the indoor
temperature when it is running low.

HOW TO USE THE TABLE STAND

OR WALL MOUNTING

Turn the table stand knob out to place the main unit on a flat
surface. Or you can hide the stand and mount the unit on a
wall using the recessed hole.

As for the remote unit, use the provided Velcro ® tape to secure
it in place.

Main unit

Wall-mount Table Stand

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Remote unit

Wall-mount

Velcro ® tape

THE RESET BUTTON

The [RESET] button is used to enhance synchronization of
signals after battery replacement or when the unit is operating
in an unfavorable way or malfunctioning. Use a blunt stylus to
hold down the button. All settings will return to their default
values.

PRECAUTIONS

This unit is engineered to give you years of satisfactory service
if handled carefully.

1. Do not immerse the unit in water.

2. Do not clean the unit with abrasive or corrosive materials.

3. Do not subject the unit to snow or excessive force, shock,
dust, temperature or humidity.

4. Do not tamper with the unit's internal components.

5. Do not mix new and old batteries or batteries of different
specifications

SPECIFICATIONS

Temperature Measurement

Main unit

Indoor Temperature measurement
Displayed IN temperature range : -9.9°C to +70.0°C

(14.2°F to 158.0°F)

Proposed operating range : -5.0°C to +50.0°C

(23.0°F to 122.0°F)

Temperature resolution : 0.1°C (0.2°F)

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Remote Temperature measurement
Displayed OUT temperature range : -50.0°C to +70.0°C

(-58.0°F to 158.0°F)

Proposed operating range : -5.0°C to +50.0°C

(23.0°F to 122.0°F)

Temperature resolution : 0.1°C (0.2°F)

Remote unit

Displayed temperature : -50.0°C to +70.0°C

(-58.0°F to 158.0°F)

Proposed operating range : -20.0°C to +60.0°C

(-4.0°F to 140.0°F)

Temperature resolution : 0.1°C (0.2°F)
RF Transmission Frequency : 433 MHz
No. of Remote unit : Maximum of 3
RF Transmission Range : 30 meters

Temperature sensing cycle : around 30 seconds

Power

Main unit : use 2 pcs UM-3

(open area)

or”AA” 1.5V
alkaline battery

Remote sensing unit : use 2 pcs UM-4 or

Weight

Main unit : 76 gm (without

Remote sensing unit : 67 gm (without

Dimension

Main unit : 142(L) x 84(W) x

Remote sensing unit : 92(L) x 60(W) x

“AAA” 1.5V
alkaline battery

battery)

battery)

24.5(T) mm

21(T)
mm

NOTE ON COMPLIANCE

This product complies with standards and specifications of
BZT, FCC and article number 334 of PTT.

Warning: Changes or modif ications to this unit not e xpressly
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

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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 grarantee 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:

1. Reorient or relocate the receiving antenna.

2. Increase the separation between the equipment and receiver.

3. Connect the equipment into an outlet on a circuit different
from that to which the receiver is needed.

4. Consult the dealer of an experienced radio/TV technician
for help.

CAUTION

- The content of this manual is subject to change
without further notice.

- Due to printing limitation, the displays shown in
this manual may differ from the actual display.

- The manufacturer and its suppliers held no
responsibility to you or any other claim arising
by using this product.

- The contents of this manual may not be
reproduced without the permission of the
manufacturer.

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