Oregon Scientific™ High Precision Body Weight
Monitor with Body Fat Index
Model: GA101
User Manual
TABLE OF CONTENTS
Introduction ................................................................................................................. 2
Warnings ..................................................................................................................... 2
Key Features ............................................................................................................... 4
How the Body Weight Monitor Works....................................................................... 4
Brief Description ........................................................................................................ 4
Body Mass Index ....................................................................................................... 5
What is Body Mass Index (BMI)?........................................................................... 5
How to Interpret BMI .............................................................................................. 5
Body Fat Index .......................................................................................................... 6
What is Body Fat Index? ........................................................................................ 6
How Body Fat is Measured .................................................................................... 6
How to Interpret Body Fat Index ............................................................................ 6
How to Interpret Body Fat Level Indicator.............................................................. 7
How Body Fat Percentage Fluctuates ................................................................... 7
Safety and Care Instructions ..................................................................................... 8
Getting Started ............................................................................................................ 9
Unpacking the Body Weight Monitor ......................................................................... 9
Selecting a Location for the Body Weight Monitor .................................................... 9
Setting up for the First Time ...................................................................................... 9
Setting the Height and Age for a User....................................................................... 10
Taking Measurements ................................................................................................ 11
Taking Measurements with Stored User Settings ..................................................... 11
Taking Measurements as a Guest User .................................................................... 12
Taking Weight-Only Measurements .......................................................................... 12
Resetting ..................................................................................................................... 13
Replacing the Batteries .............................................................................................. 13
Addendum ................................................................................................................... 13
Weight Unit Conversion............................................................................................. 13
Troubleshooting Guide .............................................................................................. 14
Specifications ............................................................................................................. 15
Additional Resources ................................................................................................. 15
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with warm soapy water after handling. Remove the batteries if the Body Weight Monitor will
be in storage for an extended period of time.
• Liquids, moisture, and foreign objects – Never insert foreign objects in or spill liquids on the
product, as this can cause electric shock and damage to the unit. Do not immerse this
product in water.
OTHER NOTICES
Disposing of this Product
When disposing of this product, do so in accordance with your local waste disposal
regulations.
Statement of Responsibility
Oregon Scientific assumes no responsibility for any incidental losses (such as the costs of
recording or the loss of income from recording) incurred as a result of faults with this product.
Oregon Scientific will not be held liable for any bodily injury, death, property damages or any
other claims of whatever nature resulting from the misuse or negligence of this product,
whether intentional or unintentional. Furthermore, Oregon Scientific will not be responsible
for any deviations in the usage of the device from those specified in the user instructions or
any unapproved alterations or repairs of the product.
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KEY FEATURES
Front view
Back view
LCD Display
- Button
+ Button
Set button
Metal Foot pads
Scale Platform
Reset button
User Setting Switches
Carrying Handle
Battery Compartment
LCD display symbols
HOW THE BODY WEIGHT MONITOR WORKS
BRIEF DESCRIPTION
When you step on the Monitor, a weight measurement is taken. The Monitor can also help
you to automatically calculate your Body mass index (BMI) and Body Fat Index, two
internationally accepted indicators of health and obesity levels.
Weight alone is not a good enough indicator of health because it does not differentiate
between muscles, tissues, bones, and fat. As such, when a person loses weight, it may be
a result of the loss of muscles or body water but not fat. In order to better understand your body
composition and current health level, both the BMI and Body Fat Index should be observed.
Neither the BMI nor the Body Fat Index, taken individually, gives the complete picture of your
health. For example, bodybuilders often have high BMI (considered obese) but low Body Fat
Index (considered healthy). The BMI, in this case, does not take into account that the extra
weight is from muscles and water but not fat. Conversely, a very thin person may have low
Body Fat Index (considered healthy) but also lower-than-accepted BMI (considered unhealthy).
This means that the person is still at risk health-wise, despite the low Body Fat Index.
NOTE
Consult your physician before you begin a new diet or exercise program.
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BODY MASS INDEX
What is Body Mass Index (BMI)?
Body mass index (BMI) is a widely used international standard that measures weight to height
ratio to determine obesity. BMI is expressed by the following terms:
Body weight (kg)
BMI =
[Body height (m)]2
The BMI is only a general indicator of your health level. As such, accuracies may vary
depending on your body type and composition. Consult your physician to find out more about
your current health.
NOTE To convert pounds or stone pounds to kilograms, and inches to meters, refer to the
conversion reference on page 13.
How to Interpret BMI
Use the resulting BMI value with the chart below to determine your current level of health:
NOTE Asians have a separate BMI range due to their different body composition.
Description
Health Indication
Underweight
BMI Range
Your body weight is currently lower than
average. Work toward healthy, regular food
intake and exercise routine to build up your
health to recommended levels.
Less than 20.0*
* Asian BMI:
Less than 18.5
Your health is at the recommended level.
Maintain a balanced diet and exercise to
keep your current level of health.
Recommended
Overweight
Obese
20.0 – 25.0*
* Asian BMI:
18.5 – 23.0
Your body weight may be above normal.
Increase your exercise and work out a diet
plan to lower your risk for serious illness.
25.1 – 29.9*
* Asian BMI:
23.0 – 29.9
At this level, you may be at risk for heart
disease, high blood pressure, and other
illnesses. Consult with your doctor to develop
a proper health and fitness plan.
30.0 or greater*
* Asian BMI:
30.0 or greater
NOTE
Group
Children and
teenagers
BMI should not be used as a guideline for health risks for the following groups:
Reason
BMI ranges are only based on adult heights.
Athletes and
bodybuilders
Pregnant or
nursing women
People over the
age of 65
BMI does not differentiate between fat and muscle, thus making it
inaccurate for persons with high muscle volumes.
This group generates naturally high fat reserves as part of the
pregnancy.
Fat reserves naturally tend to be higher with older persons.
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References:
1. Jequier, E. (1987) Energy, obesity, and body weight standards.
2. American Journal of Clinical Nutrition, 45, 1035-1047
3. Japan Society for the Study of Obesity
4. The Weight Loss Research Center
5. myDr. (www.mydr.com.au)
BODY FAT INDEX
What is Body Fat Index?
Body Fat Index is a measurement of the total percentage of fat in your body. For example,
if you weigh 70 kg and your Body Fat Index is 15%, then you are retaining 10.5 kg of fat. The
remaining weight is composed of muscles, bones, tissues, and body water.
Among overweight people, it is excess fat and not weight alone that carries health risks. Since
the body comprises elements of varying densities, weight or BMI cannot fully measure exactly
how much excess fat a person carries. For example, two people of the same weight and BMI
may have big differences in body composition. One may carry excess fat while the other carry
acceptable level of fat needed to regulate the body. As such, a Body Fat Index measurement
is an effective assessment of your current health level.
Essential fat is necessary for bodily functions, since it helps to maintain body
NOTE
temperature an insulate organs and tissues.
How Body Fat is Measured
The Monitor uses the method of Bioelectrical Impedance Analysis (BIA)
to measure body fat. This method gives high precision, is completely
safe, and is widely used in the medical field. The principle of BIA is as
follows: The Monitor sends a low, harmless electrical signal through
your body that flows freely. As such, the machine uses this to calculate
the body fat Index (along with the person’s age, gender, height, weight,
and build).
BIA Foot-to-Foot
Measuring Diagram
How to Interpret Body Fat Index
Use the resulting Body Fat Index value with the chart below to determine your current level
of health:
Gender
Body Fat
Standard
High
Age Group in Years
Under 30
>28%
30-39
>29%
40-49
>30%
Over 49
>31%
Adult Men
Moderately High
Optimal Range
Low
22-28%
11-21%
6-10%
<6%
23-29%
12-22%
7-11%
<7%
24-30%
13-23%
8-12%
<8%
25-31%
14-24%
9-13%
<9%
Very Low
High
Adult Women
>32%
>33%
>34%
>35%
Moderately High
Optimal Range
Low
26-32%
15-25%
12-14%
<12%
27-33%
16-26%
13-15%
<13%
28-34%
17-27%
14-16%
<14%
29-35%
18-28%
15-17%
<15%
Very Low
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How to Interpret Body Fat Level Indicator
In addition to displaying your Body Fat Index, the Monitor provides a Body Fat Level Indicator
on the LCD screen to help you immediately gauge your level of health without referring to the
chart above.
Very Low
Low
Optimal
High
Very High
Body Fat Standard Reason
Very High
Body Fat Index at this level indicates the person is seriously
obese to a degree that this can have adverse health
consequences. Maintaining this level of fat for a long period of
time places the person at risk of hypertension, heart disease,
and diabetes. Consult your doctor on a long-term weight loss
and exercise program.
High
It is likely that the person is obese. Careful implementation and
monitoring of diet and exercise is recommended.
This is the ideal level of body fat for the average person.
For athletes, this is a desirable level of body fat. For regular
persons, a regular diet should be considered to improve the
balance of body composition.
Optimal
Low
Very Low
The level of body fat is dangerously low. Persons in this level
should seek to implement a regular diet. Maintaining this level of
body composition can place a person at risk of malnutrition and
other health risks.
Reference:
1. Robert M. Ross, Andrew S. Jackson: Exercise concepts, calculations, and computer
applications.
Carmel, Ind.: Benchmark Press, 1990.
How Body Fat Index Fluctuates
It is recommended that you choose a time slot to measure body fat and then monitor it
regularly at the same condition. Ideally, body hydration level is most stable during late
afternoon, right before dinner. Please note the many factors may alter an individual’s body
fat reading, including alcohol consumption, taking a bath or exercising, waking up, eating,
fever and illnesses.
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SAFETY AND CARE INSTRUCTIONS
CARING FOR YOUR BODY WEIGHT MONITOR
To ensure you receive the maximum benefit from using this product, please observe the
following guidelines.
Clean with a damp cloth. Do not use abrasive or corrosive cleaning
agents.
Do not attempt to repair the product yourself. This will terminate the
warranty and may expose you to dangerously high voltages. Contact the
dealer or a qualified repairman if the product requires servicing.Do not
store the Monitor in an upright position.
Do not store the Monitor in an upright position.
Do not place objects on the Monitor or stand it in an upright position.
Do not expose the product to excessive force, dust, temperature
fluctuations, or humidity.
Allow the Monitor to settle for at least 30 minutes whenever there is a
sudden change in ambient environment (e.g., from an outdoor area to an
air conditioned room).
SAFETY PRECAUTIONS
Please observe the following safety precautions when setting up and using your Body Weight
Monitor.
Do not immerse the product in water or place the Monitor on a wet
surface.
Keep the product away from heat sources such as radiators, stoves, and
heaters.
Do not use the Monitor on an uneven surface.
Use carpet feet (supplied) if you place the Monitor on a carpet.
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GETTING STARTED
UNPACKING THE BODY WEIGHT MONITOR
When you unpack your Body Weight Monitor, make sure to keep all the packing materials
in a safe place, in case you need to later transport or return it for servicing. In the box, you
will find:
The Monitor
4x AA 1.5-V Batteries
User Manual
4x Carpet Feet
Selecting a Location for the Body Weight Monitor
Diagram Instructions
Place the body weight Monitor on a hard, even
floor surface. Avoid thick carpeting or use the
supplied carpet feet.
NOTE
Placing the Monitor on the floor will display
on the LCD. This indicates that it is
calibrating. Simply leave the Monitor on the floor for 1-2 seconds to allow self-calibration.
Setting up the First Time
To set up your Body Weight Monitor:
Diagram
Instructions
1. Remove and discard the clear plastic tab
inside the battery compartment.
2. Set the measurement unit:
2.1. Press and hold
until “lb” flashes.
2.2. Press + or - to set unit in lb (pounds),
st-lb (stones), or kg (kilograms).
2.3. Press
to confirm the change.
NOTE
If “lb” or “st-lb” is selected, the unit
for your height is defaulted to feet and
inches. If “kg” is selected, the unit for
height is set to centimeters.
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Setting the Height and Age for a User
With this product, you can set and store the age and height for up to four people (users 1 to
4) who regularly use the Body Weight Monitor.
Once you set the height and age for a user, the GA101 can automatically calculate the body
mass index (BMI) and Body Fat Index whenever the person uses the Monitor.
NOTE
If the batteries are low, you cannot store the height and age to memory.
Diagram
Instructions
1. Each user is represented by the four user
setting switches at the edge of the Monitor.
Press 1, 2, 3, or 4 to select one of the users.
NOTE
Make sure not to store your height and age
over someone else’s existing profile.
2. Select your gender:
2.1 Press and hold
flashes.
until the Male icon
2.2 Press + or - to toggle between genders.
2.3 Press to confirm the change.
3. Enter your current age:
3.1 Press + or - to adjust the value.
3.2 Press
to confirm.
4. Enter your height
4.1 Press + or - to adjust the value.
4.2 Press
to confirm.
NOTE
To enter your height in feet and inches,
switch the Monitor to “lb” or “st-lb”. (Page 9)
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TAKING MEASUREMENTS
If you have entered a user setting, you can make use of the saved settings to automatically
find out your weight, BMI, and Body Fat Index. For users who do not have settings stored, you
can choose to take measurements as a “Guest User”.
NOTE
It is necessary that you step onto the Monitor with your bare feet. The electric signal
sent from the Monitor cannot give readings if socks or shoes are worn.
TAKING BODY FAT MEASUREMENTS WITH STORED USER SETTINGS
Diagram
Instruction
1. Press user setting switch 1, 2, 3, or 4 to select
the user corresponding to your settings. The
LCD will show your height, gender and age.
2. Wait until your settings disappear and the
weight “0.0” is displayed.
3. Step on the Monitor. Stand still while the
measurement is being taken. The Monitor will
beep when the measurement is complete.
The weight, BMI, and Body Fat Index will
display.
NOTE
If “
” is shown, the Monitor is unstable
while measuring your weight. Make sure to
remain still and place the Monitor on a flat
surface. Use the carpet feet if the ground is
uneven. Step off the Monitor and follow the
instructions from the beginning.
NOTE If “
” is shown, you have stepped on
the Monitor too early. Step off the Monitor and
follow the instructions from the beginning.
NOTE
If “ ” is shown, the maximum loading
capacity for the Monitor has been exceeded.
Step off the Monitor and try again with less
than 150kg of weight.
NOTE
If you wait for too long before stepping
on the Monitor, the LCD display will go blank.
Step off the Monitor and follow the instructions
again from the beginning.
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TAKING MEASUREMENTS AS A GUEST USER
Diagram Instruction
1. For users without stored settings, simply step
on the Monitor while the LCD screen is blank.
NOTE
If “
” is shown, the Monitor is unstable
while measuring your weight. Make sure to
remain still and place the Monitor on a flat
surface. Use the carpet feet if the ground is
uneven. Step off the Monitor and follow the
instructions from the beginning.
NOTE
If “
” is shown, you have stepped on
the Monitor too early. Step off the Monitor and
follow the instructions from the beginning.
2. Stand still while the measurement is being
taken. The Monitor will beep and the Male
icon will flash.
NOTE If “ ” is shown, the maximum loading
capacity for the Monitor has been exceeded.
Step off the Monitor and try again with less
than 150kg of weight.
3. Step off the Monitor and select your gender:
3.1 Press + or - to toggle between genders.
3.2 Press
to confirm.
4. Enter your current age:
4.1 Press + or - to adjust the value.
4.2 Press
to confirm.
5. Enter your height :
5.1 Press + or - to adjust the value.
5.2 Press
to confirm.
NOTE To enter your height in feet and inches,
switch the Monitor to “lb” or “st-lb”.
6. Your weight, BMI, and Body Fat Index are
then displayed.
TAKING WEIGHT-ONLY MEASUREMENTS
The Body Weight Monitor is equipped with a patented STEP-ON mechanism to help you
take Body Weight measurement without switching on the Monitor. You do not need to wait
for measurements like the majority of scales in the market.
To measure your body weight only, just step on the Monitor then step off after your body
weight is shown. Alternatively, you can tap on your User Setting Switch, then step on the
Monitor after "0.0" is shown on the display. Remain on the Monitor until your body weight
is shown. After a moment, your BMI will also be calculated.
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RESETTING
The reset button is located in the battery compartment on the back of the Monitor. Use a blunt
stylus such as a paper clip to press the button.
REPLACING THE BATTERIES
This product requires four (4) 1.5-volt AA batteries to operate (supplied).
Diagram
Instructions
1. Replace the batteries whenever the display
shows one of these signs:
2. Remove the old batteries and set aside.
3. Insert the new batteries. Be sure to match the
polarity as shown in the diagram.
4. Replace the battery compartment lid and
close.
NOTE
The display shows "CAL" once you place
the Monitor on a horizontal surface. Just leave
the Monitor on the floor for 1-2 seconds to allow
self-calibration.
NOTE
Batteries can be harmful to the environment. Contact your local waste disposal
authority for proper disposal instructions.
ADDENDUM
Weight Unit Conversion
Unit
Description
Geographic
application
Conversion
kg
lb
Metric kilogram
Imperial pound
Global
1 kg = 2.20 lb
1 kg = 0.16 stone
1 lb = 0.45 kg
United States
United Kingdom
1 lb = 0.07 stone
1 stone = 14.0 lb
1 stone = 6.36 kg
st-lb
British stone pound
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TROUBLESHOOTING GUIDE
This section includes a list of frequently asked questions for problems you may encounter with
your Body Weight Monitor. If the product is not operating as you think it should, check here
before arranging for servicing.
Problem
Symptom
Check this
Remedy
No power
The display is
dim.
The batteries
are low.
Replace with new batteries (p.13).
The display is
blank.
Batteries are
exhausted.
Batteries are
inserted
Replace with new batteries (p.13).
Insert the batteries correctly
(p.13).
incorrectly.
Error message
Display shows Batteries are
Replace the batteries.
.
low.
shown on
the display.
The weight on
the Monitor is
unevenly
distributed or
unstable.
Make sure to remain still and
place the Monitor on a flat
surface. Use the carpet feet if the
ground is carpeted or uneven.
shown on
the display.
You have
stepped on the
Monitor too
early.
For user with saved settings, wait
until the display shows the weight
as “0.0” before stepping on.
Weight, BMI,
and Body Fat
Index
Monitor shows The Monitor is
The maximum weighing capacity
is 150kg (330 lb / 23st - 8lb).
Remove the weight from the
Monitor.
“
” when
overloaded.
weighing.
Display
problem
The
measurement
is inaccurate.
The Monitor is
uneven or on
the carpet.
Use the supplied carpet feet or
place the Monitor on a flat, even
hard surface.
Socks or shoes
are worn.
Remove your socks, shoes, and
other heavy accessories before
using the Monitor.
The entered
gender, age, or
height is
Re-enter your user settings with
the correct values.
wrong.
Measurements
vary drastically
after a short
period.
Fluctuations in body fat during the
day are normal. Refer to p.7 for
information regarding this.
Weight does
not display
The Monitor
needs to be
reset.
Reset the Monitor (p.13).
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SPECIFICATIONS
Dimensions:
Width x Depth x Height
Weight
315(w) x 340(d) x 50(h) mm
1.8kg (excluding batteries)
Weight measurement:
Weighing mechanism
Weight units
4 load cell Strain-gauge System
kilogram (kg) / pounds (lb) / stone pounds (st-lb)
150kg / 330 lb / 23st-8lb
Maximum Weighing Capacity
Graduation
0.1 kg / 0.2 lb
BMI:
BMI measurement range
Body Fat measurement:
Measurement mechanism
Body fat measurement range
Body fat Index display resolution
Gender
up to 50 kg/m2
6 conductive pads BIA technology
5 – 75%
0.1%
Male / Female
7 to 99 years old
Age
Height input:
Height units
centimeters (cm) / feet (‘) and inches (“)
80 – 230.0 cm / 2’ 7.5” – 7’ 6.6”
0.1cm or 0.1”
Min / Max height
Height resolution
Power:
Power supply
4xLR6 / AA / UM-3 1.5v batteries
auto-off after 5 – 10 seconds
Power save
Operating environment:
Operation temperature
5° C … 45° C (41° F…113° F)
at ≤85% relative humidity
Storage temperature
-5° C ….60° C (23° F … 140° F)
at ≤85% relative humidity
ADDITIONAL RESOURCES
and other Oregon Scientific™ products such as digital cameras, telephones, hand-held
organizers, alarm clocks, and weather stations. The website also includes contact information
for our customer service department, in case you need to reach us.
Help us protect the environment. Recycle the packaging, batteries, and product after
you no longer need them.
© 2003 Oregon Scientific. All rights reserved.
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