JUMBO RF WALL CLOCK
WITH INDOOR - OUTDOOR THERMOMETER
MODEL NO.: JMR828A
Instruction Manual
GB
INTRODUCTION
Congratulations on purchasing the Jumbo RF Wall Clock with
Indoor-Outdoor Thermometer (JMR828A).
The JMR828A is a multifunctional radio frequency (RF) controlled
clock. It is designed to automatically synchronize its current
time and date when brought within range of the radio signal
generated from the U.S Atomic clock.
Also, this unit displays outdoor and indoor temperature.
Included in this package is a remote thermo-sensor. Place the
thermo-sensor in a sheltered outdoor location within a 100 feet
(30 meters) radius of the main unit and it will transmit outdoor
temperature readings to the JMR828A.
DESCRIPTION OF PARTS
A MAIN UNIT
A1 Extra-large liquid crystal display (LCD)
• Displays the time, date and day-of-the-week
A2 [ ] Radio-reception signal
Indicates the condition of radio reception
A3 [
A4 [
A5 Bottom line of LCD
A 6 [ CHANNEL
A7 [
A8 [
A9 [ ZONE ] button
A10 [
] Low-battery indicator
Activates when the battery power is low
] Low- battery indicator (remote sensor)
Activates when the remote-sensor battery power is low
Displays indoor temperature /date / outdoor temperature
]
Toggles between different channels
CLOCK
Toggles between “seconds” and day-of-the-week
displays or activates the calendar-clock setting mode
Increases the value of a setting
Toggles among the 4 US time-zones: Pacific (P),
Mountains (M), Central (C) or Eastern (E)
THERMO
Retrieves temperature information
] UP button
] button
] button
A6
A2
A5
A7
A8
A9
A13
A11 [°C/°F] Slide Switch
Toggles between Degree Celsius (°C) or Degree Fahrenheit
(°F) temperature display unit
A12 [
RESET
Resets the unit by returning all settings to their default
values
A13 Battery Compartment
Accommodates two UM-3 or AA-size 1.5V batteries
A14 Table Stand
For placing the unit on a flat surface
A15 Wall-Mount Hole
For mounting the unit on a wall
1
] Button
A1
A3
A4
A15
A12
A11
A10
A14
GB
B REMOTE THERMO SENSOR
B1 LCD
Displays the current temperature monitored by the remote
unit
B2 LED indicator
Flashes when the remote unit transmits data to the main
display unit
B3 °C/°F slide switch
Selects between Centigrade (°C) and Fahrenheit (°F)
B4 [
] Low-battery indicator
Appears when the battery power is low
B5 RESET button
Returns all settings to default values
B6 Battery compartment
Accommodates two UM-3 or AA size batteries
B7 BATTERY DOOR
B8 Wall-mount holder
Use to mount remote sensor on a wall
B9 Removable table-stand
For standing the remote unit on a flat surface
Note: The effective range may be limited by building
materials and the position of either the main unit or the
remote thermo-sensor unit. Try various set-up
arrangements for best result.
Setting up the thermo-sensor unit:
1. Position the remote sensor within the signal transmission
range of the main display unit. The maximum transmission
range is 100 feet (30 metres).
2. Remove the screws of the battery door on the remote thermosensor unit.
3. Select display of temperature in either °C or °F using the
°C/°F slide switch.
˚C ˚F
1 2 3
CHANNEL
RESET
4. Install into the thermo-sensor unit, two UM-3 or "AA" size
1.5V batteries strictly according to the polarities shown.
B4
B1
B2
2
B3
B5
B6
B7
B8
B9
BATTERY INSTALLATION AND REMOTE
THERMO-SENSOR SETUP
Follow this step-by-step procedure for installing batteries and
setting up the remote-sensor unit. Successful setup should ensure
that temperature signals are properly received.
5. Replace the battery compartment door and secure its screws.
Note: Though the sensor is splash proof and is meant for
use outside, it should be placed away from direct sunlight,
rain, or snow.
Once the batteries have been inserted into the remote thermosensor unit, batteries can now be inserted into the main unit.
BATTERY INSTALLATION : MAIN UNIT
This unit requires two (2) UM-3 or “AA” size batteries for operation.
How to insert batteries into the main unit:
1. Press the door tab and click-open the door.
2. Insert the batteries strictly according to the polarities shown
therein.
UM3 AA
UM3 AA
2
3. Replace the door so that it clicks into place.
Note: If not disposed of properly, batteries can be
harmful. Protect the environment by taking
exhausted batteries to authorized disposal stations.
Note: [
] Low-battery indicator
Replace the batteries when the Low-battery indicator lights up.
ABOUT RADIO RECEPTION
The JMR828A is a radio frequency (RF) controlled clock. When
located within radio signal range from the U.S Atomic Clock , the
clock time will automatically synchronize with time-signal
transmission. The benefit of a RF controlled clock is that highlyaccurate time is maintained and manual adjustments to the time
and date are not required.
When the batteries are first installed, the JMR828A will
automatically search for a radio signal.
When in search mode, the antenna icon [ ] will blink. This
process takes between two (2) and (10) minutes. After initial
search and synchronization with the Atomic clock, short periodic
reception-signal scans will commence several times a day.
The antenna icon indicates the quality of reception.
day-of-the-week display
“second” display
The day-of-the-week is displayed as an abbreviation in three
languages.
Language
Monday Tuesday Wed. Thursday Friday Saturday Sunday
English
Spanish
French
Day-of-the-week
GB
STRONG
WEAK
NO RECEPTION
RECEIVING
To deactivate the auto-reception of the radio signal, press and
hold [ZONE] for 2 seconds and the antenna icon will disappear.
To enable this auto-reception again, press and hold [
] for 2
seconds. The antenna icon will re-appear.
Interference
Reception can be affected by a number of factors. For best reception,
place the device away from metal objects and electrical appliances.
Note: Interference from sources such as TV sets can affect
the signal. If, after batteries have been inserted for ten
minutes, the radio signal is not received, then set the time
manually (see section: How To Set The Calendar Clock
Manually).
SECONDS AND DAY-OF-THE-WEEK
DISPLAY
The “second” and the day-of-the-week share the same section of
the display.
To change the “seconds” display to the day-of-the-week display:
1. When the “seconds” are displayed, press [CLOCK] once.
To change the day-of-the-week display to the “seconds” display:
1. When the day-of-the-week is displayed, press [CLOCK] once.
HOW TO SET THE CALENDAR CLOCK
MANUALLY
When the unit is outside of the radio signal generated from the
U.S Atomic Clock, the unit may require manual setting.
Note: The RF controlled mechanism overrides manual
settings unless auto-reception of radio signal is being
deactivated. If manual settings are made, the clock will
periodically adjust the time to what is indicated by the
radio signal.
It is highly unlikely you should ever have the desire (or need ) to
manually set the clock time, year, month or date of the JMR828A
when it is within signal range of the Atomic clock.
However, in the event this becomes necessary please review the
following.
3