Oregon Scientific BAR938HGA User manual

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Cable Free Weather Station
withThermo-Hygrometer
and Radio controlled clock
MODEL: BAR938HGA
USER’S MANUAL
INTRODUCTION
Congratulations on your purchasing of BAR938HGA Cable Free
Weather Station with Thermo-Hygrometer and Radio controlled
clock.
RF- controlled, BAR938HGA can automatically synchronize its
current time and date when it is brought within range of the radio
signal generated from the U.S. Atomic Clock.
BAR938HGA does weather forecasts with kinetic-movement
graphic illustrations and tells indoor and outdoor temperature. It
also shows the trend of changes plus the recorded maximum and
minimum temperatures.
Apartfromtemperature,BAR938HGAshowstheindoorandoutdoor
relative humidity and rates the comfort level. It also stores in
memory the maximum and minimum relative humidity readings. A
remotethermo-hygrosensorisincludedwiththeunit.BAR938HGA
is able to receive and display readings from up to 3 remote sensors.
The built-in barometer enables BAR938HGA to display the
atmospheric pressure with user-selectable altitude adjustment. A
bar graph will show the pressure trend of the last 24 hours.
Whatismore,BAR938HGAisequippedwithamoonphasescanner,
which lets you check the moon phase of any day between 1990 and
2019.
Other features include a HiGlo backlight, daily alarm and extra-
large display.
No wire installation is required between the main and remote units.
AsBAR938HGAoperatesat433MHz,itcanbeusedintheU.S.and
most places in Continental Europe. However, the Atomic Clock
function of the BAR938HGA is pertinent to the U.S. only.
MAIN FEATURES: MAIN UNIT
A RADIO RECEPTION SIGNAL
Indicates the condition of radio reception
B LIGHT BUTTON
Turns on the backlight for five seconds
C CLOCK WINDOW
Displays the current time and date
D ALARM ON ICON
Appears when the alarm is activated
E ALARMICON
Appears when the alarm time is displayed
F MAIN UNIT BATTERY LOW ( ) INDICATOR
Lights up and blinks when the batteries of the main unit are
running dry
G REMOTE UNIT BATTERY LOW ( ) INDICATOR
Lights up when the batteries of the remote unit are running
dry
H WEATHER FORECAST WINDOW
Graphically displays weather forecast
I TEMPERATUREWINDOW
Shows the current temperature or the maximum or minimum
recorded temperature
J IN/OUT-REMOTE INDICATOR
Indicatesifthecurrentreadingisdisplayedasindoororoutdoor-
remote

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K TEMPERATURETREND ARROWS
Indicates the trend of temperature changes
L °C/°F SLIDE SWITCH
Selects between Centigrade (°C) and Fahrenheit (°F) display
M RELATIVE HUMIDITY WINDOW
Displays the relative humidity
N COMFORT LEVEL INDICATOR
Icons display the comfort level
O BAROMETRIC PRESSURECHART
Shows the barometric pressure trend chart for the last 24
hours
P BAROMETRIC PRESSURE WINDOW
Displays the current barometric pressure
Q PRESSURE HISTORY INDICATOR
Indicates the pressure history of previous hours
R PRESSURE UNIT SLIDE SWITCH
Selects between mb/hPa and inHg display
S MOON PHASE SCANNER
Graphically illustrates the current moon phase or for other
specified dates.
T CHANNELBUTTON
Selects among indoor & channel 1, 2, 3 or to enter auto scan
mode
U MEMORYBUTTON
Displays the maximum or minimum temperature and relative
humidity or erases the memory
V HISTORY BUTTON
Selects the pressure history of previous hours
W UP( )AND DOWN( )BUTTONS
Increases or decreases the value of a setting and scan the
moonphase status
X ALARM BUTTON
Displays the alarm time
Y MODE BUTTON
Triggers the clock setting mode
Z RESET BUTTON
Resets the unit by returning all settings to their default
values
AA BATTERYCOMPARTMENT
Accommodates four UM3 or AA-size batteries
AB TABLE AND CONTROL STAND
Acts as control panel and supports the unit when lying flat.
AC LOCK SLIDE BUTTON
Slide to the right to lock the 2 panels
AD UNLOCKBUTTON
Press to release the lock
AE ALT UP ( ) AND ALT ( ) BUTTONS
Increases or decreases the value in compensational altitude
setting
AF ZONE BUTTON
Toggles among the 4 U.S. time-zones: Pacific, Mountain,
Central or Eastern
MAIN FEATURES: REMOTE UNIT
MODEL THGR238N
a Two-lineLCD
Displays the current temperature and humidity monitored by
the remote unit
b LEDindicator
Flashes when the remote unit transmits a reading
c °C/°F slide switch
Selects between Centigrade (°C) and Fahrenheit (°F)
d Channel slide switch
Designates the remote unit Channel 1, Channel 2 or
Channel 3
e RESET
Returns all settings to default values
f Batterycompartment
Accommodates two AA-size batteries
g Battery door
h Wall-mountholder
Supports the remote unit in wall-mounting
i Removable table stand
For standing the remote unit on a flat surface
BEFORE YOU BEGIN
For best operation,
1. Insert batteries for remote units before doing so for the main
unit.
2. Position the remote unit and main unit within effective trans-
mission range, which, in usual circumstances, is 100 feet.
Though the remote unit is weather resistant, it should be placed
away from direct sunlight, rain or snow.

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BATTERY AND CHANNEL
INSTALLATION: REMOTE UNIT
The remote thermo-hygro sensor unit uses two (2) UM-3 or “AA”
size alkaline batteries.
Follow these steps to install / replace batteries:
1. Remove the screws on the battery compartment.
2. Select the channel number on the CHANNEL slide switch.
3. Select the temperature display unit on the °C/°F slide switch.
4. Insert the batteries strictly according to the polarities shown
therein.
5. Replace the battery compartment door and secure its screws.
Replacethebatterieswhenthelow-batteryindicatoroftheparticular
channel lights up on the main unit. (Repeat the steps described in
section“BEFOREYOUBEGIN”)
Note that once a channel is assigned to a remote unit, you
can only change it by removing the batteries or resetting the
unit.
BATTERY INSTALLATION: MAIN UNIT
1. Gently press and lift the tab on the battery compartment door.
2. Insert four UM3 or AA-size batteries.
3. Replace the battery compartment door.
Replace the batteries when the low battery indicator [ ] on
the weather forecast window lights up.
HOW TO USE THE BACKLIGHT
Press the LIGHT button once. The backlight will be turned on for
five seconds.
TIME DISPLAY MODES
The current time and date can be displayed. To toggle among the 4
U.S. time-zones, press the ZONE button.
Pressing the ALARM button will display the daily alarm time. To
go back to normal time and date display, press MODE.
ABOUT RADIO RECEPTION
BAR938HGAis designedtoautomatically synchronize itscalendar
clockonce itisbrought within rangeofthe U.S.AtomicClock radio
signal. It will scan and adjust every full hour. When the unit is new
and just out of the box, synchronization with the U.S. Atomic
Clock can take up to 72 hours.
When the unit is receiving radio signal, the RADIO RECEPTION
indication will start to blink. A complete reception generally takes
about 2 to 10 minutes, depending on the strength of the radio
signal.
Whenthereceptioniscomplete,theRADIORECEPTIONindication
will stop blinking. If the signal is received, a RADIO RECEPTION
indication [ ] will be shown. Otherwise, [ ] is displayed.
For better reception, place the clock away from metal objects and
electrical appliances to minimize interference.
Should you wish to deactivate the RF controlled function, press
and hold UP and DOWN button simultaneously.
To reactivate the RF control function, from its deactivated status
press and hold UP and DOWN simultaneously.
HOW TO SET THE CLOCK AND
CALENDAR MANUALLY
When the current time is displayed, press and hold MODE for
three seconds. The year digits will flash. Use the UP or DOWN
button to select. Holding down either button will increase or
decrease the value rapidly.
Press MODE. The month digits will flash. Use the UP or DOWN
buttons to select. Press MODE to set the day. Repeat the steps to set
hour and minute. Press MODE to confirm.
If changes are made during minute-setting, the seconds will clear to
zero and stop.
- Good
- No signal
- Receiving

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NOTE ON °C AND °F
The outdoor temperature display on the main unit is dominated by
the selection on the °C/°F slide switch of the main unit. Whatever
the display unit of the remote sensor is, it will only apply to the
remote sensor. The temperature display on the main unit will be
automatically converted to the chosen one on the main unit.
MAXIMUM AND MINIMUM
TEMPERATURES & HUMIDITY
The maximum and minimum recorded temperatures and humidity
will be automatically stored in memory. To display them, press
MEMORY to toggle among the maximum, minimum and current
temperatures and humidity. The respective MAX or MIN indicator
will be displayed.
To clearthe memory,hold down MEMORYfor threeseconds.The
maximum and minimum temperatures and humidity will be erased.
If you press MEMORY now, the maximum and minimum
temperatures and humidities will have the same values as the
current one until different readings are recorded.
TEMPERATURE AND HUMIDITY TREND
The temperature trend and humidity trend indicators show the
trend of collected readings. Three trends rising, steady and falling,
will be shown.
WEATHER FORECAST
BAR938HGA is capable of detecting barometric pressure changes,
and based on the data collected, can predict the weather for the
next 12 to 24 hours. The effective range covers an area of 18 to 30
miles.
sunny
partlycloudy cloudy rainy snowy
HOW TO SET AND ACTIVATE
THE DAILY ALARM
Whenthe dailyalarmtimeis displayed,pressand hold ALARMfor
three seconds.
Enter the value for the hour digits by the UP or DOWN button.
Press ALARM to confirm and go to the minute digits. Enter the
value and press ALARM to confirm.
The alarm is automatically activated and [ ] will be displayed.
To deactivate it, press ALARM once in the alarm display mode.
When the alarm is active, it will go off at the set time. The display
will light up for five seconds with the [ ] icon flashing. Without
interruption, the alarm will go off for 1 minute.
To stop the alarm, press [ALARM], [MODE], [LIGHT], [ ],
[] or [ZONE] button.
HOW TO CHECK INDOOR AND OUTDOOR-
REMOTE TEMPERATURES & HUMIDITIES
To display indoor temperatures and humidities, press the
CHANNEL button until the [ ] indicator lights up.
To display outdoor-remote temperatures and humidities, press the
CHANNEL button to scroll through the readings from up to 3
remote sensors.
The temperature can be shown in Centigrade (°C) or Fahrenheit
(°F). The unit is selected on the °C / °F slide switch.
If the readings go above or below the specified range, the display
willshowflashing“HHH”or “LLL”.
CHANNEL SCAN FUNCTION
Press and hold CHANNEL button for 3 seconds to enter channel
scan function. The readings of each channel will be displayed
automatically,onebyone,for4seconds.PressCHANNEL againto
stop the scan function.
NOTE ON REMOTE TEMPERATURE
& HUMIDITY
Once batteries are in place for the remote unit, it will start transmit-
ting samplings at 39-43-second intervals.
If no signals are received when the remote temperature and
humidity is selected, blanks will be displayed. Press and hold the
CHANNEL and MEMORY buttons together to enforce a search.
This is useful in synchronizing the transmission and reception of
the remote and main units.
If that fails, check if the remote unit is still in place. Make sure the
transmission is within range and path is clear of obstacles and
interference.
Repeat this procedure whenever you find discrepancies between
the reading shown on the main unit and the remote unit.
Arrow
indicator
Temperature
Trend Steady FallingRising
Arrow
indicator
Humidity
Trend Steady FallingRising

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NOTE:
1. The accuracy of a general pressure-based weather forecast is
about 70 to 75%, and therefore, we cannot be held responsible
for any inconveniences so caused by an inaccurate one.
2. The weather forecast is meant for the next 12 to 24 hours. It may
not necessarily reflect the current situation.
3. The “Sunny” forecast covering night hours indicates clear
weather.
COMFORT LEVEL INDICATORS
ThecomfortlevelindicatorsCOMFORT,WETorDRYwilltellyou
if the curent environment is comfortable, too wet or too dry.
The comfort indicators will appear on the display of the main unit
when the following conditions are satisfied:
HOW TO CHECK
THE BAROMETRIC PRESSURE
The current and historical barometric pressure is shown on the
atmospheric pressure window. For monitoring the Sea Level
barometric pressure reading at certain altitude, the user needs to
select the local altitude (-100 to 2500 meters i.e. -328 to 8223 feet)
forthealtitudesetting. TheBAR938HGArequiresentryofelevation
inmeters notfeet. Therefore,to convertfeetto meters,multiply feet
by 0.3048. To determine your location elevation, please either
contact your local library, TV/ radio weather forecaster, or via
Intenet at http://www.worldatlas.com/aatlas/infopage/
elvation.htm. To enter the altitude compensation setting mode,
pressandholdHISTORYbutton. UsetheALTUPorALTDOWN
button to select from -100 to 2500 meters i.e. -328 to 8223 feet
(whichever appropriate). Press HISTORY button to confirm and
exit. If the altitude changes, the “ALT” icon will flash to indicate
such change. It will stop flashing when the pressure reading is
recorded again.
The atmospheric pressure can be displayed in mb/hPa or inHg. The
pressure unit is selected on the atmospheric pressure slide switch
inside the battery compartment.
If you want to check the pressure history for a particular hour
during the past 24 hours, press the HISTORY button. Each press
on the button will go back by an hour.
Therecordedbarometricchanges forthe past 24hours aredisplayed
in a bar chart above the barometric pressure window.
HOW TO USE AND SCAN
THE MOON PHASE
BAR938HGA is equipped with a moon phase display and scanner
which displays the eight moon phases ( i.e. from new moon to
waningcrescent) onthescreen.The phasewhichfalls on thecurrent
day will apperar on the screen alone for five seconds. For example,
if the currrent day is an exact full moon, the full moon icon will
flash.
The eight phases are:
To check the moon phase for a particular day, press the UP or
DOWN button once. The clock will enter moon phase scanning
mode.
Use the UP or DOWN button to set the date you want to check.
You can go back in time or travel to the future, any day between the
hundred years from 1990 to 2019. The corresponding moon phase
will appear on the screen.
The unit will return to the last display mode when the UP and
DOWN buttons are left idle for 10 to 15 seconds.
HOW TO WALL MOUNT OR
USE THE TABLE STAND
Wall-mount
First, adjust the control panel and display panel so that they are
parallel to each other. Press the sides of the display panel and
control panel towards each other. Slide the LOCK button to the
right to lock the 2 panels together. The unit can be wall-mounted
using its recessed screw holes.
Indicator
displays
on the unit
Temperature
Range
20°C to 25°C
(68°F to 77°F)
-5°C -+ 50°C
(23°F - 122°F)
-5°C -+ 50°C
(23°F - 122°F)
Humidity
Range
40%RH-
70%RH
OVER-
70%RH
Below
40%RH
Shows that
the Current
Environment
Ideal range for
both relative
humidity and
temperature
Contains excess
moisture
Contains
inadequate
moisture
No
Indicator
Less than
20°C( 68°F) or
More than
25°C (77°F)
40%RH
to
70%RH No comment
New Moon
Waxing Crescent
First Quarter
Waxing Gibbous
Waning Crescent
Last Quarter
Waning Gibbous
Full Moon

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SPECIFICATIONS
• Temperature Measurement
Main unit
Indoor Temperature measurement
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 Temperature measurement
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)
Relative Humidity Measurement
Indoor relative humidity : 25%RH to95%RH
measurement range
Resolution : 1%RH
Remote unit
Measuring 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 : up to 3 units
RF Transmission Range : Maximum 100 feet
Temperature sensing cycle : around 39 - 43 seconds
• Relative Humidity Measurement
Remote relative humidity : 25%RH to95%RH
measurement range
Resolution : 1%RH
• Barometric Pressure Measurement
Pressure measuring range : 795 to 1050 mb/ hPa
(23.48 to 31.01 inHg)
Pressure sampling cycle : 15 minutes
• Moon Phase Functions
Moon Phase Scanner Range : From 1990 to 2019
• Radio Controlled Clock
- Maintime set and synchronized by Radio Signal from the U.S.
Atomic Clock
- User selectable 12 or 24h display with hh : mm ss
- Date Format : Month-Day
- 1-minute alarm
Table-stand
First, unlock the two panels by pressing the unlock button. Lay the
control panel on a flat surface. Then adjust the angle of the display
panel for best display and support.
HOW TO RESET THE UNIT
The RESET button allows you to return all settings to factory set
values. The button is required only when the unit is not operating
in a favorable way, such as in the rare case of a malfunction.
The RESET button is located at the back of the unit below the
battery compartment. Press the button with a blunt stylus to reset
all values to their default settings.
MAINTENANCE
When handled properly, this unit is engineered to give you years
of satisfactory service. Here are a few product care instructions:
1. Do not immerse the unit in water. If the unit comes in contact
with water, dry it immediately with a soft lint-free cloth.
2. Do not clean the unit with abrasive or corrosive
materials.Abrasive cleaning agents may scratch the plastic
parts and corrode the electronic circuit.
3. Do not subject the unit to excessive: force, shock, dust,
temperature, or humidity. Such treatment may result in
malfunction, a shorter electronic life span, damaged batteries,
or distorted parts.
4. Do not tamper with the unit’s internal components. Doing so
will terminate the unit’s warranty and may cause damage. The
unit contains no user-serviceable parts.
5. Only use new batteries as specified in this instruction manual.
Do not mix new and old batteries as the old batteries may leak.
6. Read this instruction manual thoroughly before operating the
unit.

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• Power
Main unit : use 4 pcs UM-3 or “AA”
1.5V alkaline battery
Remote sensing unit : use 2 pcs UM-3 or “AA”
1.5V alkaline battery
• Weight
Main unit : 10.79 ounces
Remote sensing unit : 3.53 ounces
• Dimension
Main unit : 7.17 x 5.24 x 1.10 inches
Remote sensing unit : 3.62 x 2.36 x .83 inches
NOTE ON COMPLIANCE
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.
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
interferencetoradioortelevisionreception,whichcanbedetermined
by turning the equipment off and on, the user is encouraged to try
tocorrecttheinterferencebyoneormoreofthefollowingmeasures:
Reorient or relocate the receiving unit.
Increase the separation between the equipment.
Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
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)503-6398883
Name and model number of the product: Remote Thermo-Hygro
BAR938HGA
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.
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 [email protected].
WARRANTY
This product is warranted to be free of manufacturing defects for a
period of 90 days from date of retail purchase. Defective product
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.