Oregon Scientific RMR166 User manual

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Multi-Channel Indoor & Outdoor
Thermometer with Cable Free™ Sensor &
Radio Controlled™ Clock
MODEL: RMR166
USER'S MANUAL
INTRODUCTION
Thank you for purchasing the RMR-166 Multi-Channel Indoor-
Outdoor Thermometer with 433MHz Cable Free™temperature
sensor and Radio Controlled™calendar clock.
This basic package consists of the main temperature and calendar
clock unit and a wireless remote temperature sensor, model THN-
138. The main unit can support up to three Cable Free™ remote
sensors. Additional remote sensors are available.
The main unit has a large easy-read LCD screen that displays the
indoor temperature, clock with calendar and temperature data
transmitted by the remote sensor to the main unit. In addition, the
RMR-166 will store in memory the maximum and minimum
indoor temperatures and temperatures transmitted from the remote
sensor.
The RMR-166 clock is a radio-controlled clock. The clock
automaticallysynchronizescurrenttimeanddate with radio signals
received from the US Atomic Clock, one of the world’s most
accurate timepieces. To learn more about the US Atomic Clock
visit the US Department of Commerce's National Institute of Stan-
dards and Technology website at www.nist.gov. Other features
include three-language display choice, four-step crescendo daily
alarm and easy-change display modes.
MAIN FEATURES
AL C
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CHANNEL
M D
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ZONE
ON/OFF
Model No. RMR166
RMR166RemoteThermometer
Tested To Comply
With FCC Standards
FOR HOME OR OFFICE USE
J
F
CHANNEL
SET / MODE
MEMORY
DAILY
EXACTSET RADIO CONTROLLED
CABLE FREE

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A. THREE-LINE LCD DISPLAY
Easy- read display of remote sensor and indoor temperatures,
and calendar clock functions
B. [ ] REMOTE SENSOR LOW BATTERY ICON
Indicates the remote-sensor battery power is low and batteries
need replacing
C. [ ] MAIN UNIT LOW BATTERY ICON
Indicates the main unit battery power is low and batteries need
replacing
D. [ ] USATOMIC CLOCK SIGNAL RECEPTION ICON
Graphically displays the radio signal reception strength
E. [CHANNEL] BUTTON
Identifies and selects the remote sensor channels of 1 - 3
F. [ ]ALARM-ON ICON
When displayed indicates that the daily alarm is activated
G. [MEMORY] BUTTON
Displays and switches between Maximum/Minimum
temperatures
H. [SET/MODE] BUTTON
Switches between display modes and saves user-selections
made during setting the function values
I. [DAILY ((.))] BUTTON
Sets the time for the alarm
J. [((.))]ALARM ICON
Indicates that the alarm time is displayed
K. [ ▲] BUTTON
Advances the value of a setting
L. [ ZONE ] BUTTON
Selects the US time zone
M. °C/°F SLIDE SWITCH
Selects between degrees Centigrade (°C) and Fahrenheit (°F)
N. [RESET] BUTTON
Returns all settings to their original default values
O. [ALARM ON/OFF] BUTTON
Activates or disables the alarms
P. BATTERY COMPARTMENT
Accommodates two (2) "AA" (UM-3) size batteries
Q. REMOVABLE TABLE STAND
For standing the main unit on a flat surface
R. WALL-MOUNT RECESS
For mounting the unit on a wall

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REMOTE SENSOR FEATURES
433MHZ CABLE FREE
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A. LED LIGHT
Flashes when the remote sensor transmits data to the main unit
B. CHANNEL SLIDE SWITCH
Assigns and identifies the channel of the remote sensor
C. RESET BUTTON
Returns all settings to their original default values
D. BATTERY COMPARTMENT
Accommodates two “AA” (UM-3) size batteries
E. BATTERY COMPARTMENT DOOR
F. WALL-MOUNT HOLDER
Holds the remote sensor for wall-mounted display
G. MOVABLE TABLE STAND
For standing the remote unit on a flat surface
BEFORE YOU BEGIN
For best operation:
1. When using more than one remote sensor assign a different
channel to each of the remote sensors.
2. Insert batteries in the remote sensor BEFORE inserting the
batteries into the main unit.
3. Press [RESET]on the main unit after installing batteries. Place
the main unit close to the remote unit as this will expedite
initial synchronization between the remote sensor and the main
unit.
4. Position the remote sensor within the effective transmission
range of 21 - 32 yards (20 - 30 meters) from the main unit.

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MAIN UNIT BATTERY INSTALLATION
1. Gently lift the tab on the battery compartment door and
remove door.
2. Install 2 AA (UM-3) size alkaline batteries according to the
polarities as shown. Press [RESET].
ZONE
RemoteThermometer
FOR HOME OR OFFICE USE
3. Replace the battery compartment door.
LOW BATTERY WARNING
The RMR-166 features low battery warning icons for the main
unit and remote sensor(s). The main unit low battery warning icon
will be displayed on the second line of the LCD screen. The low
See “Wireless Transmission” for important information about
wireless data transmission.
NOTE: Although the remote sensors have been designed for out
door use, do not place the remote sensor in direct sunlight,
rain or snow.
REMOTE SENSOR BATTERY
INSTALLATION & CHANNEL SELECTION
1. Remove the screws on the battery compartment door.
2. Using the [CHANNEL] slide switch select the channel num-
ber of 1, 2 or 3 for that remote sensor..
RESET
3. Insert 2 AA (UM-3) size alkaline batteries according to the
polarities as shown. Press [RESET].
4. Replace the battery compartment door and secure the screws.
NOTE: Once a channel is assigned to a remote sensor,it can only
be changed by removing the batteries or resetting the unit.

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Remote Sensor:
Wall-mount Table Stand
433MHZCABLEFREE
THE RESET BUTTON
Pressing [RESET] will clear all setting and cause them to return
to their original default values. Use a blunt stylus to hold down the
button.
GETTING STARTED
Once batteries have been inserted into the remote sensor, the
sensor will start transmitting temperature readings at 30-second
intervals to the main unit.
Themain unit will startsearching for the remotesensor signal about
one minute after the batteries are installed. Upon successful signal
reception, the remote sensor channel number and corresponding
temperaturedata willbe displayed onthe topline of the LCD screen.
The indoor temperature will be displayed on the second line of the
battery warning icon for the remote sensor will be displayed on the
first line of the LCD and will identify the affected remote sensor
by its assigned channel number.
HOW TO USE THE TABLE STAND
OR WALL MOUNTING
The main unit has a removable table stand to support the unit on a
flat surface or the unit can be mounted on a wall using the recessed
screw hole.
The remote sensor also comes with a wall-mount holder as well as
a removable table top stand.
Main Unit:
Wall-mount Table Stand
CHANNEL
MD
AM
C
P
ME
ZONE
ON/OFF
ModelNo.RMR166
RMR166
RemoteThermometer
Tested To Comply
WithFCCStandards
FORHOMEOROFFICEUSE
CHANNEL
SET
/
MODE
MEMORY
DAILY
EXACTSETRADIO CONTROLLED
CABLEFREE

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LCD screen. The main unit will automatically update its readings
approximately every 30-seconds.
CHANNEL
M D
AM
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If no signals are received, blanks "----" will be displayed and the
kinetic wave icon will show " ". Press [CHANNEL] and
[MEMORY] at the same time for about 30-seconds to trigger a
signal search. This will synchronize the transmission and recep-
tion between the remote sensor and main unit.
REMOTE & INDOOR TEMPERATURES
The indoor temperature is shown on the second line of the LCD
screen.
The temperature data received from the remote sensor is displayed
on the top line of the LCD screen. Press [CHANNEL]to sequence
through the channels. The temperature displayed will be the data
for that specific channel and remote sensor.
A kinetic wave will be displayed below the channel number
indicating the quality of signal reception from that particular
channel. See “Reading the Kinetic Wave Display.”
If the main unit does not receive data from the remote sensor after
two minutes, blanks “---” will be displayed for that channel until
future data is successfully received. Verify that the remote sensor
is still in position and that the low battery icon is not displayed.
Press [CHANNEL] and [MEMORY] at the same time for about
30-seconds to trigger a signal search between the main unit and
the remote sensor.
Should the temperature go above or fall below the maximum and
minimum temperature measuring ranges of either the main unit or
the remote sensor, the LCD screen will show “HHH” or “LLL.”
See “Specifications” for Temperature Measuring Range.
READING THE KINETIC WAVE DISPLAY
The kinetic wave icons shows the signal receiving status of the
main unit. There are three different status icons:
MAXIMUM & MINIMUM TEMPERATURES
The unit is in searching mode.
Temperature readings are
securely registered.
No signals.

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The maximum and minimum recorded indoor temperatures and
those of each remote sensor are automatically stored in memory.
To display the indoor recorded temperatures, press [MEMORY]
once to display the maximum (MAX) temperature and once again
for the minimum (MIN) temperature.
To display temperature data from a remote sensor, select the
channel of that remote sensor. Press [MEMORY] once to display
the maximum (MAX) temperature and once again for the mini-
mum (MIN) temperature.
To clear the memory, hold down [MEMORY] for two seconds.
The maximum and minimum recorded temperatures will be erased.
When the memory has been cleared, the maximum and minimum
temperatures will be identical to the current temperature until new
readings are recorded.
INTERRUPTED SIGNALS
If the display for a particular channel goes blank on the main unit,
press [CHANNEL] and [MEMORY] at the same time for about
30-seconds to trigger a signal search between the remote sensor
andthe main unit.If that does not reactivate signal reception, verify:
1. The remote sensor is still in position.
2. The low battery warning icon for both the remote sensor and
main unit are not displayed. Replace batteries if necessary.
3. The remote sensor is within the effective transmission range
(approximately 21 - 32 yards) to the main unit and that the
transmission path is clear of obstacles and interference. Shorten
the distance between the remote sensor and the main unit if
necessary.
NOTE: When the temperature falls below freezing point, the
batteries in the outdoor positioned sensor will freeze,
lowering the battery voltage supply and the effective
range.
WIRELESS TRANSMISSION
Signals from other household devices including door bells, home
security systems and entry controls, may interfere with those of
this product and cause temporary reception failure. This is normal
and does not affect the general performance of the product. The
transmission and reception of temperature readings will resume
once the interference ends.
The success of wireless transmission of data may vary and is
directly related to where the remote sensor is placed and the
environmental factors of that location. Should there be difficulty
in data transmission, verify:
1. The low battery warning icon is not displayed for the main unit
or the remote sensor. Replace batteries if needed.
2. The remote sensor has been placed within the stated effective
range (21 - 32 yards) of the main unit.
3. That there is no obstacle (like a transmission tower) or
environmental reason (such as a steep hill) which is causing the
interference or blockage between the remote sensor and the main
unit.
If the difficulty continues, reposition the remote sensor to a
different location and/or closer to the main unit.
NOTE ON °C AND °F
Using the [Temperature Slide Switch], select °C for degrees in

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Centigrade or °F for Fahrenheit for both the remote sensor and the
main unit. If the remote sensor temperature selection differs from
that on the main unit, the remote temperature display will default
to the temperature display selection of the main unit.
CALENDAR CLOCK DISPLAY MODES
The RMR-166 supports two clock and calendar display modes:
MODE 1. Local Time
Hour, Minute, Seconds, Day, Month
M D
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MODE 2. Local Time
Hour, Minute, Day-of-the-Week, Day, Month
M D
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Pressing the [SET/MODE] switch will toggle between the above
display choices.
NOTE: The bottom line of the display will be replaced with the
set alarm time if the [DAILY ((.))] button is pressed.
ABOUT RADIO RECEPTION
Thesplit-second,precise timeliness ofRMR166 isachievedthrough
its internal radio receiver that responds to a special 60kHz
frequency radio signal generated by the US Atomic Clock.
The RMR-166 synchronizes the time and date with the Atomic
Clock's signal and also automatically adjusts for daylight savings
time.
The RMR-166 will automatically activate its antenna upon battery
insertion and should receive the US Atomic Clock signal in about
3 - 7 minutes. However, if the RMR-166 is new allow up to 72
hours for the unit to receive the initializing signal. The strongest
signal reception usually occurs between midnight and 4:00AM. If
the RMR-166 has not picked up a signal after 48 hours, remove
the batteries, allow the unit to clear it settings and then reinsert the
batteries. Once the RMR-166 has received the initializing signal,
updates are accomplished with greater ease.
IMPORTANT: Do not adjust the time zone until AFTER the
clock has picked up the signal.
NOTE: Signal Strength: The RMR-166, like other radio
frequency equipment, is most effective when it is placed near a
window. The RMR-166 may need to be moved or repositioned to
receive a stronger signal. For better reception, place the clock
away from metal objects and electrical appliances to minimize
interference.
On the bottom line of the LCD screen, immediately to the left of
the time display, is an icon indicating the signal reception strength
is displayed. Please note that while the RMR-166 is receiving a
signal, the “receiving” icon will flash; once the signal reception is
complete, the icon will stop flashing.

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Signal Strength Indicator Icons:
CLOCK & CALENDAR FUNCTIONS
As the RMR-166 is an Radio Controlled™ clock, it does not need
manual setting. However, instructions to set the clock manually
are included and follow:
Manually Setting the Clock:
1. Hold [SET/MODE] for three seconds. The LCD display will
return to Time Display MODE 1 and the hour digits will flash.
2. Use [▲]to select the hour. When selecting the hour, be
aware of theAM and PM designations. By pressing and hold
ing the [▲] note that the value will increase or decrease
very rapidly.
3.Press [SET/MODE] to savethe hour selection.Theminute digits
will then begin to flash. Repeat the same steps, 1 and 2 above,
to set the minutes, then the day-of-month, month, and day-of
the-week display language choice.
The time and date are displayed in 12-hour AM/PM format and
MONTH/Day format, respectively. There are three choices for the
day-of-the-week language display: English (E), Spanish (S) and
French (F).
Press [SET/MODE] to bypass any function selection setting.
Whenfunction selection settings are complete,press [SET/MODE]
to exit. The LCD screen will return to the display mode last
chosen.
IMPORTANT: As soon as any manual setting changes are made
to the clock, the signal strength display will indicate a loss of
signal strength indicating that the clock is now running on manual
settings instead of signals from theAtomic Clock. In this mode, it
is very unlikely that RMR-166 will receive signals from the US
Atomic Clock. To reactivate reception of the US Atomic Clock
signal press [RESET] or remove the batteries to allow the unit to
clear its settings and then reinsert the batteries.
SELECTING THE TIME ZONE
CAUTION: Do not press and hold [ZONE] for more than three
seconds doing so will deactivate the automatic time signal
reception capability. When the automatic time signal reception is
disabled, no signal strength icon will be displayed. To reactivate
the time search, press and hold the [▲] for three seconds.
1. On the bottom line of the LCD screen there is a map outlining
the United States that divides the United States into the four time
zones.
2. Press and release [ZONE] to sequentially advance through the
time zones from west to east.
- Strong Signal
- Weak Signal
- No Reception
- Receiving Signal

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3. The time zone selected will appear to be darkened on the map.
To see the time in a different time zone:
1. Press and release [ZONE] until the desired time zone will be
shown darkened on the display panel. The correct time for
that zone will automatically be displayed.
SETTING THE ALARM
1. Press the [((.))]. The ((.)) symbol will appear on the bottom
line of the LCD screen lower left corner. The alarm time
will also be displayed on the same line of the LCD screen.
2. Press and hold the [((.))] until the hour digits of the alarm
time will begin to flash.
3. Press and release [▲]to increase the hour slowly or press
and hold [▲]to rapidly advance the hour. When setting the
hour, be aware of the AM or PM designation.
4. When the hour is set, press [((.))] again and the minute
digits will begin to flash.
5. Press and release [▲]to increase the minutes slowly or press
and hold [▲]to rapidly advance the minutes.
6. When the alarm time is set, press [((.))] and the alarm will
automatically arm itself. When the alarm is active, a bell
icon will be displayed on the LCD screen just above the ((.)).
To disable the alarm, press [ON/OFF] until the bell icon
disappears.
ACTIVATING/DISABLING THE ALARM
To turn the alarm on or off, press [ON/OFF].
NOTE: When the alarm is on, the bell icon will appear in the
lower left corner of the LCD. If the alarm is off, there will
be no bell icon displayed.
To disable the alarm when the alarm sounds there are two ways to
turn the alarm off:
1. Press [((.))]. The alarm will remain active but will not sound
again for 24-hours.
2. Press [ON/OFF]. The alarm will not sound again until
reactivated.
IMPORTANT: If the alarm is not disabled by either option 1 or 2
above, the alarm will automatically go into “snooze” mode once,
sound again after 8 minutes and then temporarily turn itself off
until the next day.
SETTING THE DAY-OF-THE-WEEK
LANGUAGE CHOICE
The RMR-166 has three language choices for displaying the
day-of-the-week: English, Spanish, and French. To select the
language display choice:
1. Press and hold [MODE] until the hour digits begin to flash.
2. Press [MODE] five (5) more times and a single letter (“E,”
“S,” or “F”) will be displayed next to the time.
3. Press [▲]until the desired language is displayed.
4. Press [MODE] one more time to lock in language selection
and to return to normal time display mode.

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PRECAUTIONS
Thisproduct hasbeen designed and manufactured togive youyears
of service if it is carefully handled. Please follow these 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,
shortened electronic life span, damaged battery and distorted
parts.
4. Do not tamper with the unit's internal components. Doing so
will invalidate the product warranty and may cause damage to
the product. This product contains no user-serviceable parts.
5. Only use fresh batteries as specified in the user's manual. Do
not mix new and old batteries as the old ones may leak.
6. Always read the user's manual thoroughly before operating the
unit.
SPECIFICATIONS
Temperature Measurement
Main unit:
Indoor Temperature measurement
Proposed operating range: 23.0°F to 122.0°F
(-5.0°C to +50.0°C)
Temperature resolution: 0.2°F (0.1°C)
Remote Temperature measurement
Temperature resolution: 0.2°F (0.1°C)
Remote Sensor:
Proposed operating range: -4.0°F to 140.0°F
(-20.0°C to +60.0°C)
RF Transmission Frequency: 433 MHz
Maximum Number of
Remote Sensors: 3
RF Transmission Range: Maximum 32.5 yards
(30 meters)
Temperature sensing cycle: Approximately30 seconds
Radio Controlled Clock
Time set and synchronized by Radio Signal WWVB for USA
12hr Format of hh/mm/ss format
Date Format : Month/Day format
Day-of-week Language
Choice: English, Spanish,
or French (E, F, S)
Display of Four US Time Zones with Date and Day
2-minute crescendo alarm
Power
Main unit: 2 pcs AA (UM-3)
alkaline battery

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Remote sensing unit: 2 pcs AA (UM-3) 1.5V
alkaline battery
Weight
Main unit: 5.56 ounces
(without battery)
159 g (without battery)
Remote sensing unit: 2.8 ounces
(without battery)
80 g (without battery)
Dimension
Main unit: 5.66” (L) x 3.36” (W)x
0.98” (T)
141.5(L) x 84(W) x
24.5(T) mm
RemoteSensor: 4.2” (L) x 2.8” (W) x
0.84” (T)
105(L) x 70(W) x 21(T)
mm
FCC :
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:
■Increase the separation between the equipment and receiver.
■Consult the dealer of an experienced radio/TV technician for
help.
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:
Remote Thermometer RMR166
CUSTOMER ASSISTANCE
Should you require assistance regarding this product and its
operation, please contact our customer care department at 800-
853-8883 or via email at [e-mail].
WARRANTY
This product is warranted to be free of manufacturing defects for a
period of 1 year from date of retail purchase. Defective product

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should be directed to the place of retail purchase for exchange.
Should this not be possible, contact our customer care department
for assistance and a return material authorization. No returns may
be made without a return authorization. Please retain your retail
receipt as you may be asked to provide a copy of it for proof of
date purchased.
This warranty does not cover product subjected to abuse, misuse,
accidental damage or tampering.
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 contents of this manual may not be reproduced
without the permission of the manufacturer.
086-002224-02