Oregon Scientific SE138 User manual

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STRAPLESS HEART RATE MONITOR
Model: SE138
USER MANUAL
CONTENTS
Introduction................................................................ 2
Control Buttons..........................................................2
LCD..............................................................................2
Getting Started............................................................3
Activate Watch (First Time Use Only).....................3
Set Time and User Data.........................................3
Battery Replacement..................................................3
Heart Rate Measurement...........................................4
Operating Modes........................................................5
Time Mode..............................................................5
Stopwatch Mode (Chrono)......................................5
Set up Mode...........................................................6
Backlight and Keypad Lock.......................................8
Physical Condition and Workout..............................8
Training Zones........................................................8
Use in the Water..........................................................9
Specifications.............................................................9
Precautions.............................................................. 10
About Oregon Scientific..........................................10
EU-Declaration of Conformity..................................11

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INTRODUCTION
Thank you for selecting the Oregon ScientificTM Strapless
Heart Rate Monitor (SE138). The SE138 is a very practical
sports and fitness aid as it monitors your heart rate without
requiring to wear a heart rate transmitter. It is equipped with
calorie measurement along with real-time clock, stopwatch,
backlight and keypad lock functions.
CONTROL BUTTONS
2
1
3
6
7
4
5
1. -: Toggle between setting sub-modes; decrease
values
2. MODE: Toggle between modes, confirm and exit settings
3. ST/SP/+: Start / stop stopwatch; toggle between
setting sub-modes; increase values
4. / : Activate backlight; lock keypad
5. SET/RST: Enter setting sub-mode; confirm setting;
reset stopwatch and calorie values
6. Top metallic plate: Touch to enter Heart Rate Mode
and take heart rate measurement
7. Bottom metallic plate: Touch to enter Heart Rate
Mode and take heart rate measurement
LCD
11
12
1
14
15
13
16
18
2
4
5
3
6
7
8
9
10
17
1. : Indicates you are in Stopwatch Mode or the stopwatch
is running

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2. : Indicates alarm is On
3. : Smart indicator to decrease values
4. : Smart indicator to toggle between setting sub-
modes
5. Displays stopwatch, date or mode banners
6. : Indicates a heart rate reading is detected
7. : 12 hour clock
8. : Smart indicator to quick exit and return to
previous mode
9. : Calorie unit
10. : Weight unit
11. : Indicates you are in setting sub-modes
12. : Indicates beep tone is Off
13. : Smart indicator to increase values
14. : Smart indicator to toggle between setting sub-
modes
15. : Indicates keypad is locked
16. or : Indicates battery power is low
17. Displays time or calorie reading
18. : Smart indicator to confirm setting and move to
the next setting
GETTING STARTED
ACTIVATE WATCH (FIRST TIME USE ONLY)
Press and hold any key until the screen is activated.
SET TIME AND USER DATA
To effectively use the watch for calculating calorie burned
(based on the user’s age, weight, heart rate reading and
exercise time), you are advised to set the time and your
personal data in Set Up Mode. Refer to “Time Setting
Mode” and “User Data Setting Mode” in Set Up Mode.
IMPORTANT Remember to set the time and user data
after every battery replacement or power reset.
BATTERY REPLACEMENT
The watch uses a CR2032 3V battery, which has already
been installed. If or flashes, it means battery power is
low and should be replaced. If battery power is low, alarm
beeping, backlight and heart rate measuring functions
will be disabled.
1. Use a small Phillips screwdriver to remove battery
compartment lid. Once opened, please keep the

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screws in a safe place to avoid losing them.
2. Remove the old battery and insert the new one
matching the polarities.
3. Replace the lid by screwing it back into place.
HEART RATE MEASUREMENT
You can measure your heart rate anytime (except in
setting sub-modes).
1. Wear the watch on your wrist and place fingertips
(suggest to use index finger and middle finger) on both
metallic plates to enter Heart Rate Mode. A beep tone
will be heard and “HR” banner will flash to indicate the
watch is detecting heart rate reading. It will take between
6-10 seconds to detect a heart rate reading.
2. If a valid heart rate reading is detected, another
beep tone will be heard and the screen below will be
displayed. Remove your fingers.
3. To exit Heart Rate Mode, remove your fingers for 3
seconds or press MODE.
TIP
For accurate heart rate reading, make sure:
• you are not running or doing exercise
• to wear the watch on your wrist and your fingertips
touch the 2 metallic plates
If you cannot get your heart rate reading within 10 seconds or
if any unusual condition occur during heart rate reading:
• moisten your fingertips
• make sure your fingertips are warm and steady
• do not press too hard on the metallic plates
• make sure the metallic plates and the back of your
watch are clean
NOTE
• Heart rate measurement cannot be activated if
keypad is locked or battery power is low.
• Clean the watch with a soft dry cloth.
• The 2 metallic plates are very sensitive. Accidentally
touching them will trigger heart rate measurement.
Hence, to prevent from accidentally activating heart rate
measurement, you can select to lock the keypad.
• If the battery power is low, the screen below will be
displayed.

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OPERATING MODES
The watch has 3 operating modes. Press MODE to toggle
between these modes.
TIME MODE
• This mode displays the real-time clock and date.
• To set the time and date, refer to “Time Setting Mode”
in Set Up Mode.
STOPWATCH MODE (CHRONO)
You can take your calorie reading in this mode.
To start or stop stopwatch:
Press ST/SP/+.

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To take calorie reading:
Take a heart rate reading while the stopwatch is running in
order to view the calories burned. Refer to “Heart Rate
Measurement”.
The calorie reading shown in Stopwatch Mode represents
an average of the calories lost during the time elapsed.
TIP The more frequent you provide heart rate reading,
the more accurate the calorie calculation.
To reset stopwatch and calorie value:
Stop or pause the stopwatch, then press and hold SET/
RST for 2 seconds.
NOTE
• Set Up Mode cannot be accessed while stopwatch
is running.
• If stopwatch is running, pressing MODE will go to
Time Mode.
• Unless you stop the stopwatch, will blink to remind
you that the stopwatch is still timing.
SET UP MODE
There are 4 setting sub-modes in Set Up Mode.
• Press - or ST/SP/+ to toggle between these sub-
modes.
• Press MODE anytime to return to Time Mode.
NOTE icon will be displayed in setting sub-mode.
TIME SETTING MODE
To set time and date:
1. In Time Setting Mode, press SET/RST to enter
settings.
2. Press - or ST/SP/+ to set the values. Press and hold

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- or ST/SP/+ to rapidly change the values. The setting
sequence is as follows: 12 / 24-hour time; hour;
minute; year; day-month / month-day; month; day.
3. Press SET/RST to confirm and to move to the next
setting.
4. Press MODE anytime to confirm and exit settings.
ALARM SETTING MODE
To set alarm:
1. In Alarm Setting Mode, press SET/RST to enter
settings.
2. Press - or ST/SP/+ to turn alarm On or Off.
indicates the alarm is turned On. If alarm Off is
selected, press MODE to confirm and exit settings.
If alarm On is selected, press SET/RST to confirm
and set the alarm time.
3. Press - or ST/SP/+ to set the values. Press and hold
- or ST/SP/+ to rapidly change the values. The setting
sequence is as follows: hour; minute.
4. Press SET/RST to confirm and to move to the next
setting.
5. Press MODE anytime to confirm and exit settings.
To silence alarm:
• Press any button to stop the alarm and it will activate
24 hours later.
OR
• Turn the alarm Off in Alarm Setting Mode.
BEEP TONE SETTING MODE
To turn beep tone On or Off:
1. In Beep Tone Setting Mode, press SET/RST to enter
settings.
2. Press - or ST/SP/+ to turn beep tone On or Off.
indicates the beep tone is turned Off.
3. Press Mode anytime to confirm and exit settings.
USER DATA SETTING MODE
To enjoy the full benefits of this watch, set up your
personal data before you exercise. This will enable the
watch to calculate the level of calories burned while
exercising. This information helps you track your progress
over time.
To set personal data:
1. In User Data Setting Mode, press SET/RST to enter
settings.
2. Press - or ST/SP/+ to set the values. Press and hold
- or ST/SP/+ to rapidly change the values. The setting
sequence is as follows: year of birth; month of birth;
day of birth; weight unit; weight.
3. Press SET/RST to confirm and to move to the next
setting.
4. Press MODE anytime to confirm and exit settings.

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BACKLIGHT AND KEYPAD LOCK
To activate backlight:
Press / to turn backlight On for 5 seconds.
NOTE The backlight function will not operate if “ ” or
“ ” is displayed.
To toggle keypad lock On or Off:
Press and hold / for 2 seconds. indicates
keypad is locked.
PHYSICAL CONDITION AND WORKOUT
To help achieve maximum health benefits from your
workout program, it is important to know your:
• Maximum heart rate (MHR)
• Upper heart rate limit
• Lower heart rate limit
MHR is expressed in beats per minute. You can get your
MHR from an MHR test, or you can estimate it by using
the following formula:
220 - age = MHR
TRAINING ZONES
There are several training zones that are relevant to a
fitness program. The most popular zone range is from
50% to 80% of your maximum heart rate. This is where
you achieve cardiovascular benefits, burn fat, and
become fitter. When programming your watch, the lower
percentage of the zone you choose becomes your lower
heart rate limit and the higher percentage becomes the
upper heart rate limit.
50%
60%
70%
80%
90%
100%
Moderate Activity
Weight Management
Aerobic Zone
Anaerobic Threshold Zone
Red Line Zone ( maximum capacity )
There are three training zones, as described below:
TRAINING
ZONE MHR% DESCRIPTION
Health
Maintenance 65-78%
This is the lowest training
intensity level. It is good
for beginners and those
who want to strengthen
their cardiovascular
systems.
Aerobic
Exercise 65-85%
Increases strength and
endurance. It works
within the body’s oxygen
intake capability, burns
more calories and can
be maintained for a long
period of time.

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Anaerobic
Exercise 78-90%
Generates speed and
power. It works at or
above the body’s oxygen
intake capability, builds
muscle, and cannot be
maintained for a long
period of time.
The upper and lower heart rate limits are calculated by
multiplying your MHR by the percentages of the selected
training zone.
For example:
A 40-year-old training for basic health maintenance:
• His Upper Heart Rate Limit [220 - 40(age)] x 78%
• His Lower Heart Rate Limit [220 - 40(age)] x 65%
IMPORTANT Always warm up before exercise and
select the training zone that best suits your physique.
Exercise regularly, 20 to 30 minutes per session, three
to four times a week for a healthier cardiovascular
system.
WARNING Determining your individual training zone is
a critical step in the process towards an efficient and safe
training program. Please consult your doctor or health
professional to help you determine exercise frequency
and duration appropriate for your age, condition and
specific goals.
USE IN THE WATER
The SE138 watch is water-resistant up to 50 meters
(164 feet).
NOTE Set the watch before exposing it to excessive
water. Pressing the keys while in the water or during
heavy rainstorms may cause water to enter the watch.
SPECIFICATIONS
Real time clock 12/24 hour format with hour / minute
Stopwatch 00:00:00 to 99:59:59 (hrs: min: sec)
Heart rate 40 - 240 bpm
Calorie range 0 - 9999 kcal
Power 1 x CR2032 3V battery
Operating
temperature 0°C to 40°C (32°F to 104°F)
Storage
temperature -20°C to 60°C (-4°F to 140°F)
RAIN
SPLASHES
ETC
OK
SHOWERING
(WARM/
COOL
WATER
ONLY)
OK
LIGHT
SWIMMING/
SHALLOW
WATER
OK
SHALLOW
DIVING/
SURFING/
WATER
SPORTS
OK
SNORKELING/
DEEP
WATER
DIVING
NO
50M /
164 FEET

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PRECAUTIONS
To ensure you use your product correctly and safely,
read these warnings and the entire user manual before
using the product:
• Use a soft, slightly moistened cloth. Do not use abrasive
or corrosive cleaning agents, as these may cause
damage. Use lukewarm water and mild soap to clean
the watch thoroughly after each training session. Never
use the product in hot water or store it when wet.
• 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.
• 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.
• Do not scratch hard objects against the LCD display
as this may cause damage.
• Take precautions when handling all battery types.
• Remove the batteries whenever you are planning to
store the product for a long period of time.
• When replacing batteries, use new batteries as
specified in this user manual.
• 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.
• Do not touch the exposed electronic circuitry, as there
is a danger of electric shock.
• Check all major functions if the device has not
been used for a long time. Maintain regular internal
testing and cleaning of your device. Have your watch
serviced by an approved service center annually.
• 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.
NOTE The technical specifications for this product and
the contents of the user manual are subject to change
without notice.
ABOUT OREGON SCIENTIFIC
Visit our website (www.oregonscientific.com) to learn
more about Oregon Scientific products.
If you’re in the US and would like to contact our Customer
Care department directly, please visit:
www2.oregonscientific.com/service/support.asp
OR
Call 1-800-853-8883.
For international inquiries, please visit: www2.
oregonscientific.com/about/international.asp.