Omron HBF-255T User manual

Body Composition Monitor
HBF-255T
Thank you for purchasing the OMRON Body Composition Monitor.
Before using this unit, please be sure to read this Instruction Manual carefully to understand the safe
and proper use.
Please store this Instruction Manual carefully for future reference.
5649687-9A
Issue date: 2021-3-9

1
HBF-255T
Body Composition Monitor
This unit can measure and display the following parameters.
- Body Weight - Body Fat (in %)
- Visceral Fat (up to 30 levels) - Skeletal Muscle (in %)
- Resting Metabolism (in kcal) - BMI (Body Mass Index)
- Body Age
This unit is intended to be operated by adults who can understand this instruction manual. It is not for professional use in hospitals or
other medical facilities. It is intended for home use only.
Please read this instruction manual carefully before use and for further information on the individual functions.
Contents
Before using the unit...............................................................................................................................2
Notes on Safety...............................................................................................................................................................2
1. Know Your Unit .........................................................................................................................................................4
2. Insert and Replace the Batteries...............................................................................................................................5
3. Pair the Unit with Your Smart Device........................................................................................................................6
4. Set the Date and Time..............................................................................................................................................7
5. Register the Personal Data.......................................................................................................................................8
Operating instructions............................................................................................................................9
6. How to Take a MeasurementAccurately...................................................................................................................9
6.1 Correct postures during the measurement .........................................................................................................9
6.2 About the "0 kg correction" (Caution for storing).................................................................................................9
6.3 How to implement the "0 kg correction"..............................................................................................................9
7. Take a Measurement ..............................................................................................................................................10
8. View the Measurement Results on the unit ............................................................................................................12
9. View the Measurement Results on Your Smart Device ..........................................................................................12
10. Select Your Personal Number and Take a Measurement.......................................................................................13
11. Guest Mode (Unrecorded Mode)............................................................................................................................14
12. Measure Weight Only .............................................................................................................................................15
13. Weight Subtraction Function...................................................................................................................................16
14. Change or Delete Your Personal Data....................................................................................................................18
15.
Delete the Communication Setting.....................................................................................................................................19
Care and maintenance..........................................................................................................................19
16. Maintenance and Storage.............................................................................................................................................19
17. Troubleshooting................................................................................................................................................................20
18. Technical Data ........................................................................................................................................................22
Information on body composition .......................................................................................................23
19. Information on Body Composition...........................................................................................................................23
20. Measurement Results Interpretation Diagrams .....................................................................................................25

2
Before using the unit
Notes on Safety
Symbols and denitions are as follows:
Danger Improper use may cause danger resulting in death or serious injury.
Warning Improper use may result in possible death or serious injury.
Caution Improper use may result in injury or property damage.
Danger
• Never use this unit in combination with medical electronic devices such as:
(1) Medical electronic implants such as pacemakers.
(2) Electronic life support systems such as an articial heart/lung.
(3) Portable electronic medical devices such as an electrocardiograph.
This unit could cause these devices to malfunction, posing a considerable health risk to users of these devices.
Warning:
• Keep the unit out of the reach of infants, toddlers and children. Contains small parts that may cause a choking hazard if
swallowed by infants.
• Do not use the unit on slippery surfaces, such as a wet oor.
• Do not jump onto the unit, or bounce on the unit.
• Do not use this unit when your body and/or feet are wet, such as after taking a bath.
• Stand on the unit bare-footed. Standing on the unit with socks on may cause you to slip and injure yourself.
• Do not step on the edge or display area of the unit.
• Don't place the unit against the wall.
• People with disabilities, or who are physically frail, should always be assisted by another person when using this unit.
• If battery uid should get in your eyes, immediately rinse with plenty of clean water. Consult a physician immediately.
• This product emits radio frequencies (RF) in the 2.4 GHz band. Do not use this product in locations where RF is restricted, such
as on an aircraft or in hospitals.
• As this unit is a precision instrument, do not drop, vibrate, or apply strong shocks.
Caution:
• Do not disassemble, repair, or remodel the unit.
• Do not begin a weight reduction or exercise program without consulting a physician or healthcare specialist rst. Self-diagnosis
could injure your health.
• During measurement, make sure that no mobile phone or smartphone is near this device. This may result in incorrect operation
of the device and/or cause an inaccurate reading.
• Use batteries specied for this unit. Do not insert the batteries with the polarities in the wrong direction.
• Replace worn batteries with new ones immediately.
• Do not use batteries of different manufacturers or brands together.
• Do not use new and worn batteries together.
• Do not use batteries which have passed the recommended use-by date.
• Remove the batteries from this unit when you are not going to use it for a long period of time (approximately three months or
more).
• If battery uid should get on your skin or clothing, immediately rinse with plenty of clean water.
• Do not dispose of batteries in re.
• Always wash your feet before using the unit. If you are suffering from a foot infection or other skin disease, you may cause
infection to other people.
• When the unit will be used by several people, wipe the unit with a damp cloth moistened with mild detergent after using it. Then
wipe it dry.
• Do not use this unit for purposes other than described in this manual.
• This unit is not for professional use in hospitals or other medical facilities. It is intended for home use only.

3
Data Transmission
• Do not replace the battery while your measurement result is being transferred to your smart device. This may result in the
incorrect operation of your monitor and failure to transfer your measurement result.
• Do not place integrated circuit cards, magnets, metal objects, or other devices that emit electromagnetic elds near this monitor
while your measurement result is being transferred to your smart device. This may result in the incorrect operation of your unit
and failure to transfer your measurement result.
Incorrect Measurement
Incorrect measurement might occur to the following users:
Elderly people (over 81 years old) / People with a fever / Body builders or highly trained athletes / Patients undergoing dialysis /
Patients with osteoporosis who have very low bone density / Pregnant women / People with swelling.
• Because the body composition such as body water might greatly deviate from the average value.

4
Before using the unit
1. Know Your Unit
Main Unit
Foot Electrodes
Foot Electrodes
Display
1
1
2
23 3
4
45 56 67 7
Power Touch Button
• Touch this button to turn on the power and conrm the value and turn off the power (3 seconds or
longer).
Back Touch Button
• Touch this button to conrm the result, select a personal number and set your personal data.
Advance Touch Button
• Touch this button to select a personal number, conrm the result and set your personal data.
Last Button
• Press this button to check the last value.
Back Button
• Press this button to change or delete the personal data.
Transmission Button
• Press this button to pair the unit with your smart device.
OFF Button
• Press this button to turn off the power.
Display
Battery Symbol (low/depleted)
Weight Symbol
Lights when only
measuring the body weight. Gender Symbol
Birth Date, Date Symbol
Bluetooth Symbol
Displays when the measurement
results are being transferred.
SYNC Symbol
Blinks or displays when the
measurement results need to be
transferred because the stored
memory is either almost,
or completely full.
Personal Number Symbol
Lights when personal number
is displayed.
Body Fat Percentage, Visceral Fat Level, Skeletal
Muscle Percentage Indicator
Parent-child Symbol
Lights when Weight Subtraction
function starts.
Child Symbol
Lights when the subtracted body
weight value is displayed.

5
Before using the unit
2. Insert and Replace the Batteries
1. Open the battery cover on the back of the unit.
Push the clasp and remove the battery cover.
2. Install the batteries in correct polarity as marked inside the battery
compartment.
3. Close the battery cover.
Battery Life and Replacement
■Approximately 6 months (When AAA batteries are used with four measurements, two data transfers in BLE and two
data transfers in manual BLE per day at a room temperature of 23°C)
• The supplied batteries are for trial use only, they may have a shorter life.
■When the depleted battery symbol appears on the display, replace all four
batteries with new ones.
• It uses 4 single alkaline batteries.
• Please do not use manganese dry batteries or rechargeable batteries, due to very
short use times, become the cause of wrong operation.
• Replace all four batteries with new ones (same type) at the same time.
• When the low battery symbol blinks, recommend to replace the batteries with new ones ahead of time.
■Replace the batteries after turning off the power.
• Personal data stored in the unit are retained even if the batteries are removed.
• Disposal of used batteries should be carried out in accordance with the national regulations for the disposal of batteries.
■When the batteries are replaced, you need to reset the date and time. (Refer to Section 4.)
About the Power OFF Function
■Press the OFF button to turn off the power.
■Touch the button (3 seconds or longer) to turn off the power.
■The power automatically turns off if the unit is not used for 1 minute when setting-up the
date and time.
2
1
Depleted Battery
symbol

6
Before using the unit
3. Pair the Unit with Your Smart Device
1. Turn on the Bluetooth of your smart device.
2. Download and install the "OMRON connect" app onto your smart device.
You can choose one of the following 2 methods.
■Scan the code image to get access to the following address.
www.omronconnect.com/setup
code image
■
Search the "OMRON connect" app from "App Store" or "Google Play".
3. Open the app on your smart device and follow set-up and pairing instructions.
If you already have the OMRON connect app, go to: Menu>Device>Add Device
NOTES
• One smart device manages the data of one user.
• If an app other than "OMRON connect" is used, data might not be transferred correctly.
• Please read the utilization method and usage instruction within the app for details.

7
Before using the unit
4. Set the Date and Time
Setting the date and time is necessary before taking a measurement for the rst time or after replacing the batteries.
• Date and time can be set from "OMRON connect" app as well.
1. Touch the button to turn on the power.
The year blinks on the display.
2. Select and conrm the year.
Touch the and button to select the year and touch the button to conrm.
• Setting range of year: 2014 to 2045.
3. Set the unit to the correct date and time.
Touch the and button to adjust and touch the button to conrm.
• Time is 24-hour system.
After all the settings for the year, month, day, hour and minute are displayed in that sequence,
the power automatically turns off.
NOTES
• If any mistake is made during the setting, press the OFF button to turn off the power and start from "Step 1" again.
• If, when setting-up the date and time, this monitor is not used for 1 minute, the power will automatically turn off. Set the
date and time anew.
• To modify the date or time, remove the batteries and wait for at least 20 seconds. Then insert the batteries and reset again.
Year
Month
Day
Hour
Minute

8
Before using the unit
5. Register the Personal Data
For the measurement of body composition, it is necessary to register your personal data (birth date, gender, height). The
registered data can be stored for up to 4 persons.
• The personal data can be registered from "OMRON connect" app as well.
1. Touch the button to turn on the power.
The power turns on. Personal number "1" blinks. Birth date ( ) is displayed.
2. Select and conrm your personal number.
Touch the and button to select your personal number and touch the button to conrm.
3. Set the birth date.
Touch the and button to set the birth date and touch the button to conrm.
• Setting range of year:1900 to 2045.
4. Set the gender
Touch the and button to set the gender (MALE) or (FEMALE) and touch the
button to conrm.
5. Set the height.
Touch the and button to adjust the height and touch the button to conrm.
• After all the settings are displayed for your conrmation, "0.00 kg" appears on the display.
6. Step onto the unit to take a measurement when "0.00 kg" is displayed.
The data of body weight and body composition are recorded in the unit to support automatic recognition.
After a while, the measurement results are indicated as follows.
Please confirm the correct
measurement method before your
measuring.
7. Step off the unit after the measurement results are displayed.
The personal data registration is completed.
8. Press the OFF button or touch the button (3 seconds or longer) to turn off the power.
• To add new personal data, start from the "Step 1".
Year
Month
Day

9
Operating instructions
6. How to Take a Measurement Accurately
6.1 Correct postures during the measurement
6.2 About the "0 kg correction" (Caution for storing)
The unit regularly corrects accuracy automatically when it is not in use.
• If the unit is placed as shown below this accuracy correction function does not work, implement the "0 kg correction" before
taking measurement.
The unit is leaning against the
wall or other objects The unit is placed upside down The unit is placed on an object An object is placed on the unit
The unit is leaning against the
wall or other objects The unit is placed upside down The unit is placed on an object An object is placed on the unit
The unit is leaning against the
wall or other objects The unit is placed upside down The unit is placed on an object An object is placed on the unit
The unit is leaning against the
wall or other objects The unit is placed upside down The unit is placed on an object An object is placed on the unit
The unit is leaning against
the wall or other objects
The unit is placed
upside down The unit is placed on an object An object is placed on the unit
6.3 How to implement the "0 kg correction"
1. Place the unit on a hard and level oor.
2. Touch the button to turn on the power.
3. When the "0.00 kg" is displayed, press the OFF button or touch the
button (3 seconds or longer) to turn off the power.
This completes the "0 kg correction". Wait for 5 seconds, and then take a measurement.
Take a measurement on
a hard and level oor.
Note
• A cushioned oor
surface, such as a
mat or carpet, may
result in an inaccurate
measurement.
Step onto the unit with
your bare feet.
Place the arches of
your feet onto the
center of the unit.
Note
• Stepping onto the
unit with socks or
footwear on will result
in an inaccurate
measurement.
Do not bend your knees
during measurement.

10
Operating instructions
7. Take a Measurement
When person steps onto the unit, it will be powered on to recognize the personal number automatically and start the measurement.
1. Take a measurement when the power of the unit is off.
• If the unit is not on a hard and level oor, please implement the “0.00 kg” correction before taking measurement. (Refer to
Section 6.)
• When you step onto the unit, the power automatically turns on, Estimated personal number and measurement results are
displayed.
Please confirm the correct
measurement method before
your measuring.
Estimated personal number
Measurement result
Weight is displayed in 50 grams.
2. When personal number and measurement results are displayed, the measurement is completed.
Step off the unit.
3. Conrm your personal number.
■If your personal number is correct…
Touch the button to conrm your personal number.
■If your personal number is incorrect…
Before the power turns off, select your personal number with the
and button, and then touch the button to conrm.
■ If you conrmed your personal number incorrectly…
Before the power turns off, press the Back button and then touch the and button so that you can select your
personal number again.
Estimated personal number
disappears, and last
value is displayed.
Estimated personal number
Wrong personal number may be displayed in the following cases.
• Users of similar body type and body weight are
measured. • Your body weight has changed since last measurement.
A 70.10 kg
no 1
B 70.15 kg
21
16
30
･･･ 30 days later
C 70.05 kg C 75.05 kg
no 1 no 3
If inaccurate recognition continues, select your personal number to take a measurement. (Refer to Section 10.)

11
4. Check the measurement results.
The results display rotates automatically as shown below.
Once you conrm your personal number, you can switch it to a measurement result you want to view with the and button.
Note
• Use Body Fat Percentage, Visceral Fat Level, Skeletal Muscle Percentage, and BMI classication indicator as a guide to
measurement.
• To better understand your measurement results, refer to the information and diagrams in Section 19 and 20.
WEIGHT
BODY AGE
BMI
RESTING
METABOLISM
BODY FAT
PERCENTAGE
Body Fat Percentage
Classification
VISCERAL
FAT LEVEL
SKELETAL
MUSCLE
PERCENTAGE
Skeletal Muscle
Percentage
Classification
BMI Classification
Visceral Fat Level
Classification
5. Press the OFF button or touch button (3 seconds or longer) to turn off the power.

12
Operating instructions
8. View the Measurement Results on the unit
• This unit automatically stores up to 30 measurement results per user. On the unit, only the last measurement result can be
seen. Other measurement results can be seen on the smart phone.
1. Press the LAST button and turn on the power.
2. Select your personal number.
• Touch the and button to select the personal number you want to view.
3. Touch the button to conrm the personal number.
• The last value is displayed.
4. Conrm the last value.
• Touch the and button to switch the measurement result you want to view.
Note
• When the measurement result exceeds 30 times, it is deleted from the older measurement result in turn.
Operating instructions
9. View the Measurement Results on Your Smart
Device
This unit can transmit measurement results to your smart phone. You can conrm weight and body composition changes simply
with your smart phone.
1. Open the "OMRON connect" app on your smart device. (Refer to Section 3.)
2. After taking a measurement the result will be transmitted to your smart phone through "OMRON
connect" app.
3. Follow the instructions from the "OMRON connect" app to view your measurement results.
Then you can conrm the variation of your weight and body composition parameters on your smart device.

13
Operating instructions
10. Select Your Personal Number and Take a
Measurement
If your personal number is not recognized frequently, you can select your personal number and take the measurement as follows.
1. Touch the button to turn on the power.
The power turns on. Personal number "1" blinks.
2. Select your personal number.
Select your personal number with the and button.
3. Touch the button to conrm your personal number.
"0.00 kg" is displayed.
4. Take a measurement when "0.00 kg" is displayed.
Please conrm the correct measurement method before your measuring. (Refer to Section 6.)
5. Check the measurement results.
The results display rotates automatically.
6. Press the OFF button or touch the button (3 seconds or longer) to turn off the power.

14
Operating instructions
11. Guest Mode (Unrecorded Mode)
When this mode is used, your measurement results will not be recorded.
When you use this mode, please set the birth date, gender, height before taking measurement.
1. Touch the button to turn on the power.
The power turns on. Personal number "1" blinks.
2. Select the "GUEST (no.- -)" with the and button.
Every time you touch the button, "no.1" → "no.2" → "no.3" → "no.4" → "GUEST (no.- -)" →
" (no.0)" → "no.1" ··· appear in sequence on the display.
3. Touch the button to conrm the personal number.
"0.00 kg" is displayed.
4. Enter personal data.
4.1 Set the birth date
Touch the and button to set the birth date and touch the button to conrm.
• Setting range of year: 1900 to 2045
4.2 Set the gender
Touch the and button to set the gender (MALE) or (FEMALE) and touch the
button to conrm.
4.3 Set the height
Touch the and button to set the height and touch the button to conrm.
After all the settings are displayed for your conrmation, "0.00 kg" appears on the display.
Year
Month
Day

15
5. Start Measurement when "0.00 kg" is displayed.
Please conrm the correct measurement method before your measuring. (Refer to Section 6.)
6. Check the measurement results.
The results display rotates automatically.
7. Press the OFF button or touch the button (3 seconds or longer) to turn off the power.
Operating instructions
12. Measure Weight Only
When this mode is used, your measurement result will not be recorded.
1. Touch the button to turn on the power.
The power turns on. Personal number "1" blinks.
2. Select " (no.0)" with the and button.
Every time you touch the button, "no.1" → "no.2" → "no.3" → "no.4" → "GUEST (no.- -)"
→ " (no.0)" → "no.1" ··· are displayed in sequence.
3. Touch the button to conrm the personal number.
"0.00 kg" is displayed.
4. When the "0.00 kg" is displayed, step onto the unit.
• Please conrm the correct measurement method before your measuring. (Refer to Section 6.)
5. Check the measurement result.
Your weight is displayed and blinks to indicate that measurement is completed.
6. Press the OFF button or touch the button (3 seconds or longer) to turn off the power.

16
Operating instructions
13. Weight Subtraction Function
• This product has a function that displays the 1st and 2nd body weight differences. The measurement value that is measured
with the weight subtraction function is not recorded on the unit.
• Convenient for measuring the weight of your baby or pet.
Advance Touch Button
Power Touch Button
Back Touch Button
1. Touch the button to turn on the power.
• The power turns on. Personal number "1" blinks.
2. Touch and button to select " (no.0)".
• Every time you touch the button, "no.1" → "no.2" → "no.3" → "no.4" → "GUEST (no.- -)" → " (no.0)" →
"no.1" ··· are displayed in sequence.
3. Touch the button to conrm the personal number.
• "0.00 kg" is displayed.
4. When the "0.00 kg" is displayed, step onto the unit and take the 1st measurement.
• Please conrm the correct measurement method before your measuring. (Refer to Section 6.)
The 1st measurement
result is displayed.

17
5. When the measurement result is displayed, step down from the unit.
6. Touch the button.
• The following screen appears after you hear the "Pi" sound.
7. When the "0.00 kg" is displayed, step onto the unit for the 2nd measurement.
• Please conrm the correct measurement method before your measuring. (Refer to Section 6.)
The 2nd measurement
result is displayed.
8. When the measurement result is displayed, step down from the unit.
• The 1st and 2nd body weight difference is displayed after the 2nd measurement result is displayed.
• When the body weight difference is displayed, the child mark appears.
The 2nd measurement
result is displayed. body weight difference is displayed
child mark
Note
• The 1st and 2nd measurements show the same body weight difference regardless of which one is heavier. Take measurement
in the order you feel comfortable in when stepping onto the unit.

18
Operating instructions
14. Change or Delete Your Personal Data
1. Touch the button to turn on the power.
The power turns on. Personal number "1" blinks.
2. Select your personal number.
Touch the and button to select the personal number you want to change or delete.
3. Touch the button to conrm the personal number.
"0.00 kg" is displayed.
4. Press the Back button.
"CHANGE" and "DEL" blink.
5. Select "CHANGE" or "DELETE" the personal data.
• Even if the personal data are changed, the measurement results will not be changed or deleted. When using the personal
number which has been used by another person, delete the personal data and then register the personal data again.
Change your personal data
(The measurement results will not be deleted) Delete your personal data (The measurement results will also be deleted)
1. Touch the and button to select "CHANGE"
2. Touch the button
The year blinks.
3. Change "birth date", "gender" and "height" with
reference to Step 3 ~ Step 5 of Section 5.
• To stop any change halfway, press the OFF button to
turn off the power.
• The untransferred measurement results will not be
changed.
1. Touch the and button to select "DEL"
2. Touch the button
blinks.
3. Touch the button again
• After "Clr"is displayed, you have successfully deleted
your personal data.

19
Operating instructions
15. Delete the Communication Setting
If you want to stop the use of the "OMRON connect" app or delete the communication settings from your smart device, please
operate as follows. All the communication settings recorded in the unit will be deleted.
1. Press and hold the and button more than 3 seconds.
The screen below is displayed.
2. Touch the button to conrm.
If you see "OK" as shown below, it is complete.
"Pi Pi"
Care and maintenance
16. Maintenance and Storage
How to Clean the Unit
• Always keep the unit clean before use.
• Wipe the unit with a soft dry cloth. If necessary, use a cloth moistened with water or detergent and squeeze it well before wiping
the unit, then wipe off with a dry cloth.
• Do not use benzene or thinner, or other volatile solvents to clean the unit.
• Do not wash the unit with water.
Care and Storage
• Do not store the unit in the following conditions:
- Humidity, where moisture or water may get into the unit
- High temperatures, direct sunlight or dusty places
- Places with the risk of sudden shocks or vibrations
- In places where chemicals are stored or where corrosive gas is present
• Do not carry out repairs of any kind by yourself. This product is calibrated at the time of manufacture. If at any time you question
the accuracy of measurements, please contact your authorized OMRON distributor.