Omron HBF-306C Manual (2025)

Contents

INTRODUCTION

The Fat Loss Monitor is an excellent tool to quickly measure your body fat percentage and body mass. Input your personal data. The monitor displays your estimated value of body fat percentage using the Bioelectrical Impedance Method, and indicates your body mass index in four ranges, low, normal, high and very high. This is important information you need know to monitor your weight loss or maintenance program.
Your HBF-306C comes with the following components:

• Unit
• Instruction Manual
• 2 "AAA" Batteries

Read all the information in the instruction book before using the unit.

This monitor cannot be used with a pacemaker or other implanted devices. Consult the manufacturer of the implant device and your physician before using this monitor.
SAVE THESE INSTRUCTIONS

Body Fat Ranges for Standard Adults

* Based on NIH/WHO guidelines for BMI
* Based on gallagher et al., American Journal of Clinical Nutrition, Vol.72, Sept. 2000

The above-mentioned indices refer to the values for obesity judgment proposed by the WHO, the World Health Organization.

NOTE: The body fat percentage measured by this unit may significantly differ from the actual body fat percentage in the following situations:

RECOMMENDED MEASUREMENT TIMES

Recommended times for taking a measurement
Understanding the normal changes in your body fat percentage can help you in preventing or reducing obesity. Being aware of the times when the body fat percentages shift within your own daily schedule will assist you in obtaining an accurate trending of your body fat. It is recommended to use the Fat Loss Monitor in the same environment and daily circumstances for each measurement. (See chart)

When To Avoid Taking A Measurement
If a measurement is made under the following physical conditions, the measured body fat percentage may differ significantly from the actual one because the water content in the body is changing:

• After drinking a large amount of water or after a meal (1 to 2 hours)
• After drinking alcohol
• Immediately after vigorous exercise
• Immediately after a bath or sauna

CALCULATE YOUR FIT INDEX

The Fat Loss Monitor can be set to either NORMAL or ATHLETE mode. Body composition varies based on your FIT Index.
Calculate your FIT index by using the following formula.
FIT Index = Frequency x Intensity x Time
Based on your FIT Index use the following mode when setting your personal data.
NORMAL FIT Index < 60
ATHLETE FIT Index ≥ 60

KNOW YOUR UNIT

Main unit

UNIT DISPLAY

Display

BATTERY INSTALLATION

1. Press the indicator on the battery cover and slide the cover off in the direction of the arrow.
   
2. Install 2 "AAA" size batteries so the + (positive) and - (negative) polarities match the polarities of the battery compartment as indicated.
   
3. Replace the battery cover.
   

BATTERY REPLACEMENT
All personal data set using a personal profile number is stored in the memory during battery replacement.
Low Battery Indicator
When the Low Battery Indicator appears on the display screen remove both worn batteries. Replace with two new batteries at the same time.
Long-life alkaline batteries are recommended.

SETTING THE US/METRIC MODESDG DGS

The Fat Loss Monitor can be set to either the US or Metric system.
The monitor is preset to display personal data in the US mode.
NOTE: When changing the US/Metric mode all personal data is deleted.

SETTING THE METRIC MODE

1. The monitor must be in the off position. Press the On/Off Button to turn the monitor off.
2. Press and hold the Start button, the Up button and the On/Off button in this order. Release all buttons simultaneously. The power turns on and the bottom display on the screen should read "USA".
   NOTE: If the display on the screen reads "Guest", turn the unit off.
   Try again holding the all buttons down several seconds longer.
3. Press the SET button to confirm the change. The symbol "USI" will display on the screen.
4. Press and hold the Set button again for 3-4 seconds until the upper screen displays the symbol "CAI".
5. Press the On/Off button to turn the power off.

RETURN TO THE US MODE

1. Repeat the same steps for setting the Metric Mode. The following symbols will display on the screen:
2. The bottom display on the screen should read "CA".
3. The symbol "CAI" will display on the screen.
4. The upper screen displays the symbol "USI".
   NOTE: When changing the US/Metric mode the monitor will not turn off automatically.

SETTING THE PERSONAL DATA

The Fat Loss Monitor provides two options to enter your personal data.

• Select GUEST if you do not want your personal data stored in the memory. When you select the GUEST mode you will need to enter your personal data before taking each measurement.
• Select a Personal Profile Number to save your personal data. The monitor will store personal profiles in the memory. Select a number 1 through 9. Use this number to enter your personal data and when taking a measurement.

NOTE: The display will return to the default values if the set Button is not pressed within 1 minute.
The unit will automatically turn off after one minute.

1. Press the On/Off button.
   All display symbols appear for approximately one second.
   The display symbols disappear and the GUEST symbol starts to flash.
   
2. Select the Personal Data Option.
   
   1. Press the Set button for the GUEST mode.
      The NORMAL symbol flashes on the display.
   2. Press the Up button or Down button to select your Personal Profile Number from 1 to 9.
      Press the Set button.
      The NORMAL symbol flashes on the display.

SETTING THE NORMAL/ATHLETE MODE
Select NORMAL or ATHLETE based on your FIT Index. Refer to calculate your FIT Index.

1. Press the Up button or Down button to select NORMAL OR ATHLETE.
   
2. Press the Set button.
   The HEIGHT 3icon is indicated.
   The default value 5' 7'' flashes on the display.

SETTING THE HEIGHT
Set the height between 3'4'' and 6'6''.

1. Press the Up button or Down button to change the height.
   The value changes in increments of 1/4''.
   Press and hold the button to advance at a higher speed.
   NOTE: Press the Down Button and the Up Button at the same time to reset the height to the default value.
2. Press the Set button.
   The WEIGHT icon is indicated.
   The default value 135 lb flashes on the display.

SETTING THE WEIGHT
Set the weight between 23 lbs and 440 1/2 lbs.

1. Press the Up button or Down button to change the weight.
   The value changes in increments of 1/2 lb.
   Press and hold the button to advance at a higher speed.
   NOTE: Press the Down Button and the Up Button at the same time to reset the weight to the default value.
2. Press the Set button.
   The AGE icon is indicated.
   The default value 40 flashes on the display.

SETTING THE AGE
Set the age between 10 and 80 in the NORMAL mode, and between 18 and 60 in the ATHLETE mode.

1. Press the Up button or Down button to change the age.
   The value changes in increments of 1 year.
   Press and hold the button to advance at a higher speed.
   NOTE: Press the Down Button and the Up Button at the same time to reset the age to the default value.
2. Press the Set button.
   The default value MALE flashes on the display.

DELETE PERSONAL PROFILE
All Personal Profiles, 1 through 9, stored in the memory will be deleted. You cannot delete one profile at a time.

1. Press the On/Off button.
2. Press the Up Button to select the Personal Profile Number 1.
3. Press the Set button for approximately 2 seconds. All display symbols appear for approximately one second. The display symbols disappear and the GUEST symbol starts to flash

HOW TO TAKE A MEASUREMENT

Before taking a measurement your personal data must be entered. If GUEST is used, you will need to enter your personal data prior to taking the measurement. Refer to Setting the Personal Data.

1. Press the On/Off button.
   All display symbols appear for approximately one second. The display symbols disappear and the GUEST symbol starts to flash.
2. Select your Personal Data Option.
   1. Press the Set button for Guest. Enter your personal data.
   2. Press the Up button to select your Personal Profile Number.
      The indicator appears on the screen.
      
3. Stand with both feet slightly apart.
   
4. Place both hands on the monitor by holding thegrip electrodes.
   Wrap your middle finger around the groove of the handle. Place the palm of your hand on the top and the bottom electrodes. Put your thumbs up, resting on the top of the monitor as illustrated.
   
   NOTE: The electric resistance may not be measured correctly in the following cases:
   Your fingers are apart from the grips.
   
   Your hands are unevenly positioned toward the top or bottom of the electrodes.
   
5. Hold your arms straight out at a 90° angle to your body.
   NOTE: Do not move during the measurement.
   
   Measurement taken in the following positions may not provide accurate results:
   Elbows are bent
   
   Moving your body or arms during the measurement
   
   Measuring while sitting or lying down
   
   Arms positioned upward or downward of the desired 90º angle
   

6. Press the Start button.
   The indicator appears on the screen.
   
7. Hold the electrodes with both hands.
   The monitor automatically starts the measurement. The BMI classification bar appears on the screen.
   The BMI classification, body fat percentage, and BMI are displayed.
   NOTE: Display value range:
   Body fat percentages - 4.0 to 50%
   BMI - 7.0 - 90.0
   NOTE:You can take another measurement when indicator appears on the screen.
   
8. Press the On/Off button.
   Arms positioned upward or downward of the desired 90º angle
   NOTE: If you do not turn the power off, the monitor will automatically turn off in approximately 3 minutes after displaying measurement results.

CARING FOR YOUR MONITORSDGSDGS

To keep your Fat Loss Monitor in the best condition and protect the unit from damage follow the directions below:
Clean the unit with a soft dry cloth. Avoid using any abrasive or volatile cleaners.
The unit is not waterproof; do not immerse the unit in water.
Store the unit in a safe and dry location. Do not expose the unit to direct sunlight, extreme hot or cold temperatures or humidity. Thoroughly dry any moisture off the unit before storing.
Do not subject the unit to strong shocks, such as dropping the unit on the floor.
Do not step on the unit.
Remove the batteries if the unit will not be used for three months or longer.
Use the unit consistent with the instruction provided in this manual.

ERROR INDICATORS

NUMBER	CAUSE	CORRECTION
	Electrodes were not firmly grasped.	Grasp the electrodes correctly. Refer to number 4, under "How to take a measurement".
	Hands are dry.	Slightly moisten hands with a wet towel.
	Body Fat Percentage and BMI values are outside the measurable range.	Verify your personal data is correct. "Setting the Personal Data".
	Irregular Operation	Turn the unit off, then on. Take another measurement. If the error occurs again contact Customer Service at 800-634-4350.

TROUBLESHOOTING TIPS

SPECIFICATIONS

Specifications may be changed without prior notice.