KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: info@kern-sohn.com
Operating Manual
Body fat balance
KERN MFB
Version 1.0
08/2008
GB
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
MFB -BA-e-0810
E
KERN MFB 150K100
Version 1.0 08/2008
Operating Manual
Table of Contents
1 Technical Data__________________________________________________ 3
2 Basic Information (General)_______________________________________ 4
1.0 Proper use_______________________________________________________ 4
2.0 Improper Use ____________________________________________________ 4
3.0 Warranty ________________________________________________________ 5
3 Basic Safety Precautions_________________________________________ 5
1.0 Pay attention to the instructions in the Operation Manual________________ 5
4 Transportation & Storage_________________________________________ 5
1.0 Testing upon acceptance __________________________________________ 5
2.0 Packaging _______________________________________________________ 5
5 Unpacking, Setup and Commissioning _____________________________ 5
Body fat balance
1.0 Installation Site, Location of Use ____________________________________ 5
2.0 Unpacking _______________________________________________________ 6
3.0 Battery operation (insertion and removal)_____________________________ 6
6 Operation______________________________________________________ 7
1.0 Controls_________________________________________________________ 7
1.0.0 Display ______________________________________________________________ 7
2.0.0 Keys and display overview _______________________________________________ 7
7 Using the balance_______________________________________________ 8
1.0 Entering person-related data________________________________________ 8
2.0 Usage as body fat balance__________________________________________ 9
8 Error message_________________________________________________ 12
9 Service, maintenance, disposal___________________________________ 12
1.0 Cleaning _______________________________________________________ 12
2.0 Service, maintenance_____________________________________________ 12
3.0 Disposal________________________________________________________ 12
10 Instant help _________________________________________________ 13
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1 Technical Data
KERN MFB 150K100
Readability (d) 100 g
Weighing range (max) 150 kg
Weighing Units kg, lb
Reproducibility +- (100 g +1%)
Linearity +- (100 g +1%)
Stabilization time (typical) 2 – 3 sec.
Electric Supply
Auto Off after 5 seconds
Operating temperature + 5°C … + 35°C
Storage temperature - 20°C … + 60°C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm
Weight kg (net) 1.4
Battery operated 4 x 1.5V, size AAA
Battery life for three times daily use: 1 year
300 x 320 x 55
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2 Basic Information (General)
These body fat balance are designed for the determination of body fat, water content,
muscle ratio and bone weight according to the so-called impedance method.
This method is applied to determine the resistance value of the human body with the
help of electrical impulses. A high fat ratio in the body will for instance increase the
resistance value.
For individual calculations, it is possible to store basic data (such as body height, age
and gender) for up to 10 persons.
These balance are only designed to deliver reliable values for persons aged 10 – 80
and a body height of 100 - 220 cm. In order to obtain exact results it is recommended
to step on the weighing plate lightly clad, whilst for the analysis of body components it
is essential to be barefoot.
These balance should not be used by persons requiring a cardiac
pacemaker, a respirator or other devices.
2.1 Proper use
These balance are designed for the determination of weight (in kg/lb), body fat ratio (
in % ), body water ratio ( in % ), muscle ratio ( in % ) and bone weight ( in kg ) of
persons in a private domain. Utilisation of this balance in the medical field is not
permissible.
The weighing process requires that the person steps on the weighing plate barefoot,
with one foot at a time on the 6 metal platelets. Once a stable weighing value has
been reached the weighing value can be read, followed by the other measured
values. .
2.2 Improper Use
Do not use balance for dynamic weighings. In the event that small quantities are
removed or added to the material to be weighed, incorrect weighing results can be
displayed due to the “stability compensation“ in the balance. (Example: Slowly
draining fluids from a container on the balance. )
Do not leave permanent load on the weighing plate. This may damage the measuring
system.
Take care to avoid impacts and overloading of balance above the specified maximum
load (max) under all circumstances. This could cause damage to the balance.
Never operate balance in explosive environment. The serial version is not explosion
protected.
The structure of the balance may not be modified. This may lead to incorrect
weighing results, safety-related faults and destruction of the balance.
The balance may only be used according to the described conditions. Other areas of
use must be released by KERN in writing.
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2.3 Warranty
Warranty claims shall be voided in case
Our conditions in the operation manual are ignored
The appliance is used outside the described uses
The appliance is modified or opened
Mechanical damage and damage caused by media, liquids
Natural wear and tear
The appliance is improperly set up or incorrectly electrically connected
The measuring system is overloaded
Dropping the balance
3 Basic Safety Precautions
3.1 Pay attention to the instructions in the Operation Manual
Carefully read this operation manual before setup and commissioning, even if you
are already familiar with KERN balances.
4 Transportation & Storage
4.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
4.2 Packaging
Keep all parts of the original packaging in case you need to return the appliance.
Only use original packaging for returning.
5 Unpacking, Setup and Commissioning
5.1 Installation Site, Location of Use
The balances are designed in a way that reliable weighing results are achieved in
common conditions of use.
You will work accurately and fast, if you select the right location for your balance.
Therefore, observe the following for the installation site:
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- Place the balance on a firm, level surface;
- Avoid extreme heat as well as temperature fluctuation caused by installing
next to a radiator or in the direct sunlight;
- Protect the balance against direct draughts due to open windows and doors;
- Avoid jarring during weighing;
- Protect the balance against high humidity, vapours and dust;
- Do not expose the device to extreme dampness for longer periods of time.
Non-permitted condensation (condensation of air humidity on the appliance)
may occur if a cold appliance is taken to a considerably warmer environment.
In this case, acclimatize the appliance for ca. 2 hours at room temperature.
- Avoid static charge of the balance and of the person to be weighed.
- Avoid contact with water.
If electro-magnetic fields or static charge occur, or if the power supply is unstable
major deviations on the display (incorrect weighing results) are possible. In that case,
the location must be changed.
5.2 Unpacking
Take the whole balance out of their packaging and place them at the intended
position.
In addition to the balance, delivery includes the operating instructions and a battery.
5.3 Battery operation (insertion and removal)
To insert your battery, open the battery compartment at the rear of the balance and
insert 4 alkaline batteries of AAA size in the correct direction of the pole, then close
the battery compartment.
If the balance is not used for a longer time, take out the batteries and store them
separately. Leaking battery liquid could damage the balance.
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6 Operation
6.1 Controls
6.1.1 Display
6.1.2 Keys and display overview
No. Display Description
1
2
3
4 Default: Gender of person
[arrow
down]
▼
[SET]
[arrow up]
S
Selecting parameters
Selecting or confirming your selection
Selecting parameters
Male
Female
5 age Default: Age of person
6 cm Default: Height of person
7 fat Display: Body fat ratio in %
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TBW
Display: Body water ratio in %
MUS
BONE
You can change the scale’s weighing unit from “kg“ to “lb“ at the rear of the balance.
When changing the weighing unit to lb you must enter the body height in ft.
Display: Muscle ratio in %
Display: Bone weight in kg
7 Using the balance
To switch on balance, press one of the 3 keys.
Display unit “PX“ (X may be selected from 0 to 9) starts to flash. To select a different
digit, press the arrow key up or arrow down.
Prior to initial use enter gender, age and height for each person. These entries will be
stored under the respective, previously selected number.
Set this individual number for each person before the weighing process by pressing
the arrow keys.
7.1 Entering person-related data
a. With the balance switched on, select the respective number by pressing the arrow
keys as described above and confirm by pressing the SET key. The display
described below appears:
b. When the symbol used to select the gender starts to flash you can change
between "male“ and “female“ by pressing the arrow keys. Confirm by pressing SET.
c. When body height ( cm ) starts to flash, you can change this value, too, by
pressing the arrow keys. Again, confirm by pressing SET.
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d. When age starts to flash, this too, can be changed by pressing the arrow keys.
Complete your data entries by pressing SET.
After these entries have been made, the display will show “
_ _ _ _“
for a short while.
Afterwards 0.0 kg will be displayed and the balance are ready for weighing.
When the balance are not in use they automatically switch off after a short time.
7.2 Usage as body fat balance
After having carried out the previous settings the balance will be ready for operation.
After start-up the data for the last person enabled will be shown one after the other
(gender, height and age).
If the stored data is incorrect, you will have to enter the data again or make changes.
The balance are ready for operation when 0.0 kg appears on the display. For this
purpose, the person must step barefoot on the round elements of the weighing plate
and stand as still as possible.
a. The weight will be shown automatically.
b. After the weighing value has come to a stop, the symbol “o“ will drift across the
display indicating that weighing is taking place.
c. After successful completion of the weighing process, the body fat ratio will be
shown in percent. ( fat )
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On top of this, the bottom line on the display will show an evaluation of the body fat
ratio in words.
Displayed words indicate the following:
Underfat = body fat ratio too low
Healthy = body fat ratio optimal
Overfat = body fat ratio too high
Obese = person tending towards obesity
d. The display will after a short while switch over to the percentage value for body
water ratio ( TBW )
e. Afterwards the display will switch over again in order to show the percentage value
for body muscle ratio ( MUS )
6. The display will switch over once again in order to show the absolute weight of the
bones in the body. ( BONE )
The 4 display values described above will run through twice in succession. Finally
the balance will switch off.
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Table for standard values body fat, body water, muscle and bone
Body fat (%):
Age
too low normal too
< 39 < 21 21-33 33-39 > 39 < 8 8 -19 19-25 > 25
40-59 < 23 23-35 35-40 > 40 < 11 11-22 22-28 > 28
>59 < 24 24-36 36-42 > 42 < 13 13-25 25-30 > 30
Body water (%):
Age
too low normal too
Female Male
obese too low normal too
high
Female Male
too low normal too
high
high
high
obese
10-15 < 57 57-67 > 67 < 58 58-72 > 72
16-30 < 47 47-57 > 57 < 53 53-67 > 67
31-60 < 42 42-52 > 52 < 47 47-61 > 62
61-80 < 37 37-47 > 42 < 42 42-56 > 56
Muscle (%):
Female: normal : > 34 %
Male: normal : > 40 %
Bone (kg):
Female Male
Body weight < 45 kg 45-60 kg > 60 kg < 45 kg 45-60 kg > 60 kg
Estimated bone
weight
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1.8 kg 2.2 kg 2.5 kg 2.5 kg 2.9 kg 3.2 kg
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8 Error message
Messages can be displayed when the balance are switched on or in operation.
ERR 1: Weighing range exceeded
ERR 2: Measuring started without a
barefoot person present on weighing plate.
Lo : Batteries are run down
----- : Load was present on weighing plate when started
After the load was taken off the weighing plate, the display will again show "-
----„.
9 Service, maintenance, disposal
9.1 Cleaning
Do not use aggressive cleaning agents but only a damp cloth with mild soapsuds, or
household cleaner. Ensure that no liquid gets inside the unit and rub with a soft, dry
cloth.
Loose dirt can be removed carefully with a brush or hand-held vacuum cleaner.
Balance must not be tilted or rotated for cleaning, as damage may occur.
Remove dirt immediately.
9.2 Service, maintenance
The appliance may only be opened by trained service technicians who are authorized
by KERN.
9.3 Disposal
Disposal of packaging and appliance must be carried out by operator according to
valid national or regional law of the location where the appliance is used.
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10 Instant help
In case of a fault in the program sequence, the balance should be shortly switched
off. The weighing process must then be restarted from the beginning.
Help:
Fault Possible cause
The displayed weight does
not glow.
The displayed weight is
permanently changing
The weighing result is
obviously incorrect
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
• The balance is not switched on.
• Batteries are inserted incorrectly or empty
• No batteries inserted.
• Draught/air movement
• Table/floor vibrations
• The weighing plate is in contact with foreign bodies
or is not correctly positioned.
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
• The display of the balance is not at zero
• Adjustment is no longer correct.
• Great fluctuations in temperature.
• Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
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