Oregon BAR938HGA USER MANUAL

Cable Free Weather Station

with Thermo-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.

Apart from temperature, BAR938HGA shows the indoor and outdoor
relative humidity and rates the comfort level. It also stores in
memory the maximum and minimum relative humidity readings. A
remote thermo-hygro sensor is included with the unit. 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.

What is more, BAR938HGA is equipped with a moon phase scanner,
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.

As BAR938HGA operates at 433MHz, it can be used in the U.S. and
most places in Continental Europe. However, the Atomic Clock
function of the BAR938HGA is pertinent to the U.S. only.

GB

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 ALARM ICON

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 TEMPERATURE WINDOW

Shows the current temperature or the maximum or minimum
recorded temperature

J IN/OUT - REMOTE INDICATOR

Indicates if the current reading is displayed as indoor or outdoor­remote

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K TEMPERATURE TREND 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 PRESSURE CHART

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 CHANNEL BUTTON

Selects among indoor & channel 1, 2, 3 or to enter auto scan
mode

U MEMORY BUTTON

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 (

X ALARM BUTTON

Y MODE BUTTON

Z RESET BUTTON

AA

AB

AC

AD

AE

AF

) AND DOWN ( ) BUTTONS

Increases or decreases the value of a setting and scan the
moonphase status

Displays the alarm time

Triggers the clock setting mode

Resets the unit by returning all settings to their default
values

BATTERY COMPARTMENT

Accommodates four UM3 or AA-size batteries

TABLE AND CONTROL STAND

Acts as control panel and supports the unit when lying flat.

LOCK SLIDE BUTTON

Slide to the right to lock the 2 panels

UNLOCK BUTTON

Press to release the lock

ALT UP ( ) AND ALT ( ) BUTTONS

Increases or decreases the value in compensational altitude
setting

ZONE BUTTON

Toggles among the 4 U.S. time-zones: Pacific, Mountain,
Central or Eastern

MAIN FEATURES: REMOTE UNIT

MODEL THGR238N

a Two-line LCD

Displays the current temperature and humidity monitored by
the remote unit

b LED indicator

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 Battery compartment

Accommodates two AA-size 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

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 trans­mission 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.

Replace the batteries when the low-battery indicator of the particular
channel lights up on the main unit. (Repeat the steps described in
section “BEFORE YOU BEGIN”)

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

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

BAR938HGA is designed to automatically synchronize its calendar
clock once it is brought within range of the U.S. Atomic Clock 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.

When the reception is complete, the RADIO RECEPTION indication
will stop blinking. If the signal is received, a RADIO RECEPTION
indication [

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.

] will be shown. Otherwise, [ ] is displayed.

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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.

-

Good

-

No signal

-

Receiving

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.

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HOW TO SET AND ACTIVATE

THE DAILY ALARM

When the daily alarm time is displayed, press and hold ALARM for
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 [
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.

] will be displayed.

HOW TO CHECK INDOOR AND OUTDOOR­REMOTE 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
will show flashing “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, one by one, for 4 seconds. Press CHANNEL again to
stop the scan function.

NOTE ON REMOTE TEMPERATURE

& HUMIDITY

Once batteries are in place for the remote unit, it will start transmit­ting 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.

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 clear the memory, hold down MEMORY for three seconds. 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.

Arrow

indicator

Temperature

Trend

Arrow

indicator
Humidity

Trend

Steady FallingRising

Steady FallingRising

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

partly cloudy

cloudy rainy snowy

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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

The comfort level indicators COMFORT, WET or DRY will tell you
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:

Indicator

displays

on the unit

No

Indicator

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)

Less than

20°C( 68°F) or

More than

25°C (77°F)

Humidity

Range

40%RH­70%RH

OVER­70%RH

Below
40%RH

40%RH
to
70%RH

Shows that
the Current

Environment

Ideal range for
both relative
humidity and
temperature

Contains excess
moisture

Contains
inadequate
moisture

No comment

The recorded barometric changes for the past 24 hours are displayed
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
waning crescent) on the screen. The phase which falls on the current
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:

New Moon
Waxing Crescent
First Quarter
Waxing Gibbous

Waning Crescent

Last Quarter

Waning Gibbous

Full Moon

GB

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)
for the altitude setting. The BAR938HGA requires entry of elevation
in meters not feet. Therefore, to convert feet to 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,
press and hold HISTORY button. Use the ALT UP or ALT DOWN
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.

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.

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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)

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.

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 to 95% RH

measurement range
Resolution : 1% R H

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 to 95%RH
measurement range

Resolution : 1% R H

• 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

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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
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 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.

GB

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 [e-mail].

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.

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

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