Oregon Scientific GPS Receiver GP123 User Manual
GPS mode......................................................................8  
LED light .....................................................................10  
Backlight / keypad lock ..............................................10  
Water resistance..........................................................10  
Specifications..............................................................10  
Precautions..................................................................10  
About Oregon Scientific.............................................11  
EU declaration of conformity.....................................11  
GPS Scout  
Backtrack Altimeter  
Model: GP123  
USER MANUAL  
INDEX  
Introduction ...................................................................2  
Overview ........................................................................2  
Front view ................................................................2  
LCD screen..............................................................3  
Battery replacement......................................................3  
Displays .........................................................................4  
Operation modes .....................................................4  
Time / date / alarm ...................................................4  
To set clock and alarm..................................................5  
Altimeter and barometer modes..................................5  
About the altimeter - barometer ...............................5  
To set and reset altimeter.........................................5  
To set sea level pressure .........................................6  
Compass mode .............................................................6  
About the compass ..................................................6  
Compass sensor calibration.....................................7  
Declination angle .....................................................7  
True North calibration...............................................8  
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3. DISP/-: toggle between modes; enter time setting mode;  
3. Weather forecast  
decrease value of the setting; toggle setting options  
4. Key press prompt:  
- press SET;  
- press and  
4. SET: confirm setting; toggle bottom line display (time  
/ date / alarm); enter settings for altitude/ barometer /  
compass  
hold SET  
5.  
6.  
7.  
: keypad is locked  
: sea level is displayed  
5.  
6.  
: turn on LED light  
: altitude memory is being deleted  
: turn on backlight; lock / unlock keypad  
8. AM/PM: 12 hour format  
9.  
: alarm time is displayed  
10. : daily alarm is on  
LCD SCREEN  
11.  
12.  
: GPS signal quality indicator  
/
/
: stored location (parking space / home /  
favourite spot)  
13.  
: maximum altitude reached / exceeded  
14. Measurement units (hPa, m, km / ft, inHg, mi)  
15.  
16.  
: low battery indicator  
: direction indicator  
BATTERY REPLACEMENT  
The GP123 uses 2 x AAA batteries which have already been  
installed.  
If the battery power of the unit is low,  
and ‘need new  
batt’ are displayed. Promptly replace the battery to ensure  
continuous operation of GPS and other functions.  
1. Indicates which mode (ALTI / BARO / COMPASS / GPS)  
is displayed: altitude / barometer / compass / GPS  
2. Temperature  
3
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To replace battery:  
DISPLAYS  
1. Lift up the ring lever part of the screw and rotate counter  
clockwise to open battery compartment.  
OPERATION MODES  
2. Remove battery compartment cover.  
Press DISP/- to toggle between modes:  
3. Insert the batteries, matching the polarities.  
4. Close the battery compartment and rotate screw  
clockwise to secure.  
MAX  
DISP/-  
DISP/-  
PM  
SEA  
PM  
PM  
DISP/-  
DISP/-  
PM  
TIME / DATE / ALARM  
Press SET to toggle between time / date / alarm in any  
mode.  
4
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To disable alarm:  
Press any key.  
ALTIMETER AND BAROMETER MODES  
ABOUT THE ALTIMETER - BAROMETER  
The altimeter measures altitude in either meters or feet.  
The device is equipped with an intelligent barometer that  
determines altitude by the built-in sensor and advanced  
Baro-compensation technology. It also distinguishes the  
differences between pressure caused by the changes  
in physical altitudes and pressure caused by weather  
conditions. This eliminates discrepancies and makes the  
altimeter more accurate than most of the average devices  
available on the market. Maximum altitude and instant sea  
level pressure readings are also provided.  
TO SET CLOCK AND ALARM  
1. Press and hold DISP/- to enter time setting mode.  
2. Set clock and alarm by pressing the following buttons:  
•
•
•
to increase value or toggle options  
DISP/- to decrease value or toggle options  
SET to confirm  
TO SET AND RESET ALTIMETER  
The altitude is automatically measured from the moment you  
switch on the device. It will provide both barometer readings  
and maximum sea level pressure readings.  
The setting options are: hour format, hour, minute, year,  
calendar format, month, date, alarm time (hour / minute),  
alarm on/off, measurement unit.  
To set and reset altimeter:  
NOTE For your convenience, measurement units have  
been programmed to automatically follow the same format  
(imperial / metric).  
1. Press DISP/- repeatedly to navigate to altimeter mode.  
2. Press and hold SET to enter settings.  
3. Press  
or DISP/- to change current altitude, then  
SET to confirm.  
will appear when alarm has been enabled.  
4. Press  
or DISP/- to select whether to clear  
5
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maximum altitude record (yes  
confirm.  
/
no), then SET to  
COMPASS MODE  
IMPORTANT Although the compass has been calibrated  
during the manufacturing process, it is highly recommended  
to calibrate the compass before first use to take into account  
location factors which may affect the compass.  
TO SET SEA LEVEL PRESSURE  
1. Press DISP/- repeatedly to navigate to barometer  
mode.  
For more accurate readings, it is strongly recommended to  
calibrate the compass whenever outdoors.  
2. Press and hold SET to enter settings.  
3. Set the following options (sea level pressure, weather  
forecast icons) by pressing the following buttons:  
The compass should be calibrated:  
•
•
•
•
Before first use.  
•
•
•
to increase value or toggle options  
DISP/- to decrease value or toggle options  
SET to confirm  
After the battery has been replaced.  
Before you leave for an extended outdoor activity.  
Whenever it is exposed to strong magnetic sources,  
extreme cold, or you suspect that other environmental  
conditions have affected the compass readings.  
TIP To help device quickly detect weather conditions after  
its turned on for the first time or after battery reset, you are  
recommended to manually set the weather icon. If weather  
icon has not been set, the unit will simply take longer to  
detect current weather conditions.  
•
If you notice that the compass is not showing the  
direction correctly.  
ABOUT THE COMPASS  
This device forecasts the next 12 to 24 hours of weather.  
The compass shows the bearing in degrees due North  
together with 16 cardinal  
/
ordinal points. The outer  
circumference of the display consists of 16 segments that  
graphically show the bearing. The last lit segment indicates  
North as shown below.  
Partially  
cloudy  
Sunny  
Cloudy  
Rainy  
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To calibrate the compass sensor:  
1. Press DISP/- repeatedly to navigate to compass mode.  
2. Press and hold SET. Display will show CALI and smart  
prompt  
.
3. Press SET to start calibration.  
4. Rotate the unit clockwise at a constant speed. The  
moving segments around the circumference of the  
display act as a guide. The rotation will be finished once  
you have performed 2 turns.  
NOTE OK indicates calibration has been successfully  
completed. Repeat steps 2-4 if FAIL is displayed.  
NOTE If no key has been pressed in any 5 minute period,  
the compass will time out and return to Altimeter mode  
(default display).  
DECLINATION ANGLE  
Declination is the angle between where a compass needle  
points (magnetic North Pole) and the true North Pole. The  
declination angle can vary from 0-30 degrees East (E)  
or West (W) and can be found on most maps or on the  
Internet.  
COMPASS SENSOR CALIBRATION  
NOTE  
•
Always take bearings in the open air, not inside  
buildings, tents, caves, or other shelters.  
For declinations in the United States:  
http://www.ngdc.noaa.gov/geomagmodels/Declination.jsp  
•
Compass readings should be performed away from  
magnetic materials. Avoid large magnetic objects,  
power lines, loudspeakers, electric motors etc.  
1. Enter your zip code in the text box.  
2. Click “Get Location”.  
3. Scroll down and click “Compute”.  
IMPORTANT Compass calibration should be done on a flat  
horizontal surface. If there is no flat stable surface available,  
place it on the palm of your hand so that it is perpendicular to  
your body. Using the other hand, turn the unit to calibrate.  
For declinations in Canada:  
http://geomag.nrcan.gc.ca/apps/mdcal-eng.php  
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For places elsewhere in the world, visit the website:  
2. Press and hold SET. Display will show CALI.  
http://www.magnetic-declination.com  
3. Press DISP/- to toggle to True North option. Display will  
show NORTH.  
When you set the declination angle on the compass you  
compensate for the difference between true and magnetic  
north. This makes the compass reading more accurate.  
4. Press SET to enter settings.  
5. Press  
confirm.  
to select on / off, then press SET to  
To set the declination angle:  
If ‘ON’ has been selected, rotate the unit to align direction  
indicator to true north when prompted, then press SET to  
confirm.  
1. Press DISP/- repeatedly to navigate to compass mode.  
2. Press and hold SET. Display will show CALI.  
3. Press DISP/- to toggle to declination option. Display will  
show DECLI.  
NOTE If the declination angle is turned ON, the True north  
4. Press SET to confirm.  
function will automatically turn itself OFF and vice-versa.  
5. Set the following options: on / off; West / East (only if  
ON is selected); degree of declination angle by pressing  
the following buttons:  
GPS MODE  
TIP Go outdoors and move to an open area for best GPS  
signal quality. Stand still when device searches for GPS  
signal.  
•
•
•
to increase value or toggle options  
DISP/- to decrease value or toggle options  
SET to confirm  
Press DISP/- repeatedly to navigate to GPS mode.  
TRUE NORTH CALIBRATION  
When in GPS mode, the device automatically searches for  
GPS.  
When you do not know the declination angle, the true north  
calibration function can be used to compensate for the  
difference between magnetic and true north. All you need  
to know is the direction of true north (this can be found from  
landmarks in your immediate vicinity). Setting the true north  
calibration makes the compass reading more accurate.  
NOTE Upon exiting GPS mode, GPS signal will remain  
locked for 60 seconds to allow navigating to other modes.  
will flash during search.  
To set True North calibration:  
1. Press DISP/- repeatedly to navigate to compass mode.  
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The signal quality is as follows:  
To search for stored location (backtrack function):  
1. Press DISP/- repeatedly to navigate to GPS mode.  
2. Once GPS signal has been successfully found, press  
Excellent  
Good  
repeatedly to select the symbol which represents  
the location you wish to return to.  
3. Walk according to the arrow direction as shown on the  
LCD display.  
Poor  
“No icon”  
No signal  
For GPS function to operate, signal quality needs to be good  
or excellent.  
Once GPS signal has been found, the device can store up  
to 3 locations at any one time. For your convenience, each  
location is represented by an icon:  
Icon  
Suggested use  
Parking space  
The display will also show the remaining distance. When  
REACH appears, you have arrived at the desired location.  
Home  
NOTE REACH will appear when you are close to the saved  
location.  
Favourite spot  
To mark location:  
NOTE If no key has been pressed in any 15 minute period,  
SLEEP will appear on the display indicating GPS has timed  
out. Press any key to return to GPS mode.  
1. Press  
repeatedly to select desired icon.  
2. Press and hold  
to save location into memory.  
NOTE Prolonged usage of backtrack function will shorten  
battery life.  
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Barometric  
pressure range  
300 to 1,100 hPa  
(8.86 to 32.48 inHg)  
LED LIGHT  
To turn on LED light:  
Sea level pressure 900 to 1,100 hPa  
range  
•
Press and hold  
.
(26.58 to 32.48 inHg)  
(light will remain on for the duration it is pressed)  
Weather forecast  
Digital compass  
Power  
Sunny, partially sunny, cloudy, rainy  
16 cardinal / ordinal points  
2 x UM-4 (AAA) 1.5V batteries  
BACKLIGHT / KEYPAD LOCK  
To activate backlight:  
Operating  
temperature  
-5°C to 50°C  
(28°F to 116°F)  
•
Press  
to turn on backlight for 3 seconds.  
Storage  
temperature  
-10°C to 70°C  
(1°F to 135°F)  
NOTE The backlight function will not operate if  
is  
displayed.  
PRECAUTIONS  
To toggle keypad lock On or Off:  
To ensure you use your product correctly and safely, read  
these warnings and the entire user manual before using the  
product:  
•
Press and hold  
.
indicates keypad is locked.  
•
Use a soft, slightly moistened cloth. Do not use abrasive  
or corrosive cleaning agents, as these may cause  
damage. Use luke warm water and mild soap to clean  
the unit thoroughly after each training session. Never  
use the products in hot water or store them when wet.  
WATER RESISTANCE  
The GP123 is splash proof only.  
•
•
Do not subject the product to excessive force, shock,  
dust, temperature changes, or humidity. Never expose  
the product to direct sunlight for extended periods. Such  
treatment may result in malfunction.  
SPECIFICATIONS  
Real time clock  
12/24 hour with hour, minute  
Temperature  
range  
-5°C to 50°C  
(28°F to 116°F)  
Do not tamper with the internal components. Doing  
so will terminate the product warranty and may cause  
damage. The main unit contains no user-serviceable  
parts.  
-400 to 9,000 m  
(-1312 to 29,520 ft)  
Altitude range  
10  
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•
Do not scratch hard objects against the LCD display as  
this may cause damage.  
ABOUT OREGON SCIENTIFIC  
Visit our website (www.oregonscientific.com) to learn more  
about Oregon Scientific products.  
•
•
Take precautions when handling all battery types.  
Remove the batteries whenever you are planning to  
store the product for a long period of time.  
If you're in the US and would like to contact our Customer  
Care department directly, please visit:  
•
•
When replacing batteries, use new batteries as specified  
in this user manual.  
www2.oregonscientific.com/service/support.asp  
For international inquiries, please visit:  
The product is a precision instrument. Never attempt  
to take this device apart. Contact the retailer or our  
customer service department if the product requires  
servicing.  
www2.oregonscientific.com/about/international.asp  
EU DECLARATION OF CONFORMITY  
•
•
Do not touch the exposed electronic circuitry, as there is  
a danger of electric shock.  
Hereby, Oregon Scientific, declares that this GPS Scout  
Backtrack Altimeter (model: GP123) is in compliance with  
the essential requirements and other relevant provisions  
of Directive 1999/5/EC. A copy of the signed and dated  
Declaration of Conformity is available on request via our  
Oregon Scientific Customer Service.  
Check all major functions if the device has not been  
used for a long time. Maintain regular internal testing  
and cleaning of your device.  
•
When disposing of this product, ensure it is collected  
separately for special treatment and not as normal  
household waste.  
•
•
Due to printing limitations, 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.  
COUNTRIES RTTE APPROVAL COMPLIED  
All EU countries,Switzerland CH  
NOTE The technical specifications for this product and the  
contents of the user manual are subject to change without  
notice.  
and Norway  
N
NOTE Features and accessories will not be available in all  
countries. For more information, please contact your local  
retailer.  
11  
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