KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
email: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instructions
Baby weighing scale
KERN MBB-M
Version 1.4
02/2013
GB
MBB-M-BA-e-1314
GB
KERN MBB-M
Version 1.4 02/2013
Operating instructions
Baby weighing scale
Table of Contents
1 Technical Data ............................................................................................... 4
2 Declaration of conformity ............................................................................. 5
2.1 Explanation of the graphic symbols ....................................................................................... 5
3 Basic Information (General) .......................................................................... 7
3.1 Specific function ....................................................................................................................... 7
3.2 Proper use ................................................................................................................................. 7
3.3 Improper Use............................................................................................................................. 8
3.4 Warranty .................................................................................................................................... 8
3.5 Monitoring of Test Resources ................................................................................................. 8
4 Basic Safety Precautions .............................................................................. 9
4.1 Pay attention to the instructions in the Operation Manual .................................................. 9
4.2 Personnel training .................................................................................................................... 9
4.3 Preventing contamination ....................................................................................................... 9
5 Appliance overview ..................................................................................... 10
6 Overview of displays ................................................................................... 11
7 Keyboard overview ...................................................................................... 12
8 Transportation & Storage ............................................................................ 13
8.1 Testing upon acceptance ...................................................................................................... 13
8.2 Packaging / return transport ................................................................................................. 13
2 MBB-M-BA-e-1314
9 Unpacking, Setup and Commissioning ..................................................... 14
9.1 Installation Site, Location of Use .......................................................................................... 14
9.2 Unpacking ............................................................................................................................... 14
9.3 Scope of supply ...................................................................................................................... 15
9.4 Assembly and erection .......................................................................................................... 15
9.5 Assemble the wall bracket ..................................................................................................... 16
9.6 Stand assembly (optional) ..................................................................................................... 17
9.7 Battery operation .................................................................................................................... 17
9.8 Rechargeable battery operation (optional) .......................................................................... 18
9.9 Connecting the power supply ............................................................................................... 20
9.10 Initial Commissioning ............................................................................................................ 20
10 Menu overview ............................................................................................. 21
11 Operation ...................................................................................................... 22
11.1 Weighing ................................................................................................................................. 22
11.2 Taring ....................................................................................................................................... 22
11.3 Hold function (Standstill function) ....................................................................................... 23
12 Error messages ............................................................................................ 24
13 Service, maintenance, disposal .................................................................. 25
13.1 Cleaning................................................................................................................................... 25
13.2 Service, maintenance ............................................................................................................. 25
13.3 Disposal ................................................................................................................................... 25
14 Instant help ................................................................................................... 26
15 Verification ................................................................................................... 27
15.1 Adjustment .............................................................................................................................. 27
15.2 Adjustment controls and seals ............................................................................................. 29
15.3 Checking the balance verification settings ......................................................................... 30
15.3.1 Menu overview in service mode (adjustment switch in adjustment position) ....................... 30
15.4 Navigation in the menu .......................................................................................................... 31
15.4.1 Exit menu and save .............................................................................................................. 31
15.5 Verification validity period (current status in G) ................................................................. 34
MBB-M-BA-e-1314 3
1 Technical Data
KERN
MBB 15K5M
MBB 15K2DM
Display
6-digit
Weighing range (max)
15 kg
6 kg; 15 kg
Minimum load (Min)
100 g
40 g
Verification value (e)
5 g
2 g; 5 g
Reproducibility
5 g
2 g; 5 g
Linearity
10 g
2 g; 5 g
Display
LCD 24mm digit height
Recommended adjustment
weight, (Class)
15 kg
(M1)
Stabilization time (typical)
2 – 3 sec.
Warm-up time
10 min
Operating temperature
+ 5° C …. + 35° C
Storage temperature
- 20°C … + 60°C
Humidity of air
max. 80 % (not condensing)
Electric Supply
Line adapter 15V / 300 mA ( EN60601-1)
Battery operation 6 x 1.5V, size AA
Operating life 98 h
Auto Off
After 3 min without load change, adjustable
Housing display unit
(B x D x H) mm
210 x 110 x 45
Weighing pan (WxD) mm
550 x 240
Weight kg (net)
4
Calibrated in accordance
with 90/384/EEC
Medical grade III
Medical product in
accordance with 93/42/EEC
Category I with measuring function
Rechargeable battery
Loading time 14 h
4 MBB-M-BA-e-1314
Working life 50 h
2 Declaration of conformity
0297
93/42/EEC
90/384/EEC
Non-automatic Weighing Instruments Directive
This EEC verification mark indicates that these scales are in
conformity with EEC Directive 90 / 384 / EEC for Non-Automatic
Weighing Instruments. Weighing instruments bearing this mark
are approved for medical purposes within the European Union.
SN WOC 09000100
Designation of the serial number of every device, applied at the
device and on the packaging
(Number as an example)
2009-10
Identification of the manufacturing date of the medical product.
Year and month here as example
“Please note the accompanying documents“
or “Observe operating instructions”
Kern & Sohn GmbH
D–72336 Baligen,Germany
www.kern-sohn.com
Identification of manufacturer of medical product including
address
year
0103
M
Declaration of conformity: See separate document showing serial number of device
CE marking:
2.1 Explanation of the graphic symbols
MBB-M-BA-e-1314 5
“Electro-medical appliance“
with attachment for type B
Device protection category II
Dispose of old appliances separately from your household
waste!l!
Instead, take them to communal collection points.
Temperature limit indicating the upper and the lower limit
(storage temperature on packaging)
(Temperature serving as an example)
15 V DC / 300 mA
Display of supply voltage for scales with polarity display
(Polarity and values serving as an example)
6 MBB-M-BA-e-1314
3 Basic Information (General)
Weighing instruments have to be verified for the purposes stated
below in accordance with Directive 90/384/EEC. Article 1,
paragraph 4. “Determination of mass in the practice of medicine
that is, weighing patients for reasons of medical supervision
during medical surveillance, examination and treatment.”
Indication
Determining the body weight in the medical practice area.
Operated as “non-automatic weighing instrument” which
means that you have to carefully put he baby in the centre of
the weighing pan. Once a steady display value is shown, you
can read the weight value.
Contra-
indication
No contraindication known
Scales fitted with a serial interface may only be connected to
appliances in compliance with Directive EN60601-1.
To prevent babies lying on the weighing pan from falling off the
scale, they must be watched all the time. Please observe note
on weighing pan!
3.1 Specific function
3.2 Proper use
These scales serve as a means of determining the weight of babies in medical
treatment rooms. The scales are suitable for recognising, preventing and controlling
illnesses.
MBB-M-BA-e-1314 7
3.3 Improper Use
Do not use these scales for dynamic weighing processes.
Do not leave permanent load on the balance. This may damage the measuring
system.
-Impacts and overloading exceeding the stated maximum load (max) of the weighing
pan, minus a possibly existing tare load, must be strictly avoided. This could cause
damage to the balance.
Never operate balance in explosive environment. The serial version is not explosion
protected. It should be noted that a flammable mixture of anesthetics and oxygen or
laughing gas may occur.
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.
3.4 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
3.5 Monitoring of Test Resources
In the framework of quality assurance the measuring-related weighing properties of
the balances and, if applicable, the testing weight, must be checked regularly. The
responsible user must define a suitable interval as well as type and scope of this
test. Information is available on KERN’s home page (www.kern-sohn.com with
regard to the monitoring of balance test substances and the test weights required for
this. In KERN’s accredited DKD calibration laboratory test weights and balances may
be calibrated (return to the national standard) fast and at moderate cost.
For balances with height measuring rods, we recommend a metrological examination
of the accuracy of the height measuring rod, however, this is not mandatory as the
determination of human body height involves rather large, intrinsic inaccuracies.
8 MBB-M-BA-e-1314
4 Basic Safety Precautions
4.1 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.
4.2 Personnel training
The medical staff must apply and follow the operating instructions for proper use
and care of the product.
4.3 Preventing contamination
To prevent cross-contamination (fungal skin infections, …), clean the seating surface
or weighing platform every time.
Recommendation: after a weighing procedure that could potentially result in
contamination (e. g. after weighing that involves direct skin contact).
MBB-M-BA-e-1314 9
5 Appliance overview
2
1
3
4
5
1. Weighing pan
2. Bubble level
3. Display unit
4. Stand (optional)
5. Wall bracket
10 MBB-M-BA-e-1314
6 Overview of displays
Display
Designation
Description
1
0
Zeroing display
Should the balance not display exactly
zero despite empty scale pan, press the
button. Your balance will be set to zero
after a short standby time.
2
Stability display
Scales are in a steady state
3
Power supply connected
Illuminates in the event of power supply via
mains adaptor
4
HOLD function active
Hold/Save function active
5
Net weight display
Net weight will be displayed
6
Weight value display
Current weight value will be displayed
MBB-M-BA-e-1314 11
7 Keyboard overview
Button
Designation
Function
ON/OFF-switch
Turn on/off
Zero setting key
Balance will be reset to 0.0 kg.
Possible up to max. 2% of maximum load for verified
scales or 2 % or 100% of maximum load for all other
scales (selectable via menu)
HOLD button
Hold function/Calculation of a stable weight value
TARE button
Tare balance
12 MBB-M-BA-e-1314
8 Transportation & Storage
8.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
8.2 Packaging / return transport
Keep all parts of the original packaging for a possibly required
return.
Only use original packaging for returning.
Prior to dispatch disconnect all cables and remove loose/mobile
parts.
Reattach possibly supplied transport securing devices.
Secure all parts such as the weighing pan, power unit etc. against
shifting and damage.
MBB-M-BA-e-1314 13
9 Unpacking, Setup and Commissioning
9.1 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.
On the installation site observe the following:
Place scales on a stable, even 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, vapors 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 disconnected 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.
Major display deviations (incorrect weighing results) may be experienced should
electromagnetic fields (e.g. due to mobile phones or radio equipment), static
electricity accumulations or instable power supply occur. In that case, the location
must be changed.
9.2 Unpacking
Remove the individual components of the balance or the complete balance from the
packaging with care and install at the intended location. When using the power pack,
ensure that the power cable does not produce a risk of stumbling.
14 MBB-M-BA-e-1314
9.3 Scope of supply
Balance
Power unit (in conformity with EN 60601-1), including fuse and LED
Wall bracket
Operating instructions
9.4 Assembly and erection
Make sure that the weighing pan is exactly horizontal.
Set the adjustable rubber feet of the baby scale in such a way that the air bubble
inside the spirit level (on the right next to the cable outlet to the control unit) is in the
centre.
1. Push the front of the weighing
pan (arrow) up to the stop
across the weighing platform.
2. Screw in the locking screw at
the bottom of the weighing pan
into the mount.
MBB-M-BA-e-1314 15
3. Then screw in the
corresponding locking screw to
achieve a tight fit.
4. Use the supplied knurled
screws to attach the wall
bracket to the terminal.
9.5 Assemble the wall bracket
16 MBB-M-BA-e-1314
9.6 Stand assembly (optional)
Use the 4 screws to attach
the stand to the bottom of
the scale.
Remove the two lateral
rubber plugs from the
display unit.
Secure the display unit with
the two black rotary knobs
to the fixing device.
Position display unit with the
rotary knobs.
On models where the back of the display unit is not directly accessible, remove the
two black rotary knobs from both sides of the display unit in order to open the battery
compartment and remove the display unit from the holder. Remove battery cover
from under the display unit. Insert 6 x 1.5V AA batteries into the holder. Replace
battery cover and screw the display unit back into the holder using the black rotary
knobs.
In order to save the battery, the balance switches automatically off after 3 minutes
without weighing. Further shutdown times can be set in the Menu (Function "A.OFF"),
see Section 10.
If the batteries are run down, "LO" appears in the display. To turn
off scales, press the
OFF
ON
button and immediately change the
batteries.
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.
9.7 Battery operation
MBB-M-BA-e-1314 17
9.8 Rechargeable battery operation (optional)
On models where the back of the display unit is not directly accessible, remove the
two black rotary knobs from both sides of the display unit in order to open the battery
compartment and remove the display unit from the holder.
Lift-off the battery cover on the lower
side of the balance
Carefully take out the battery holder
(1)
Carefully pull-out plug (2) from the
connection CN 4 (3)
1
When an optional rechargeable battery is used, proceed as follows:
18 MBB-M-BA-e-1314
Carefully insert the rechargeable
battery block and insert plug into
connection CN 3
Ensure that the cables are not
squeezed
Close the battery cover
If the rechargeable battery is exhausted, „LO“ is displayed. The
rechargeable battery is loaded via the provided plug-in power
supply unit (loading time 23 h for a complete loading).
If the balance is not used for a longer time, take out the
rechargeable battery and store it separately. Leaking liquid could
damage the balance.
MBB-M-BA-e-1314 19
Power is supplied by the external power unit which also serves to isolate the mains
supply from the scale. The stated voltage value must be the same as the local
voltage.
Only approved genuine KERN power supply units may be used in compliance with
Directive EN 60601-1.
In order to obtain exact results with the electronic balances, your balance must have
reached the operating temperature (see warming up time chap. 1). During this
warming up time the balance must be connected to the power supply (mains,
accumulator or battery) and be switched on.
The accuracy of the balance depends on the local acceleration of gravity.
The value of gravity acceleration is shown on the type plate.
9.9 Connecting the power supply
9.10 Initial Commissioning
20 MBB-M-BA-e-1314
10 Menu overview
Start balance by pressing
OFF
ON
Press for 3 sec., “SETUP“ will be displayed.
Select parameter by using
TARE
( ) and
HOLD
( ), as
described.
Confirm the selected parameter by pressing
TARE
( ).
AOFF
Auto off: 120 sec / 180 sec / 240 sec / 300 sec / OFF
bUrr
Audio signal: ON/OFF
End
Exit menu
If End is selected, finish set up by pressing the
HOLD
button.
0.0 kg
MBB-M-BA-e-1314 21
11 Operation
11.1 Weighing
0
Start balance by pressing
OFF
ON
The balance carry out a segment test, then the program
version is displayed.
The scales are ready for operation as soon as the weight
display for “0.0kg“ has appeared.
The button can be used to set the balance to zero at any
time.
Put baby in the centre of the weighing pan.
Wait for the rest position display , then read the weighing
result.
If the baby is heavier than the maximum weighing range, “Err”
(overload) will appear on the display screen.
The tare weight of any preloads can be deducted by pressing a button so that the
actual weight of the baby is displayed in subsequent weighings.
Put object (such as towel or padding) on the weighing pan.
0
Press
TARE
, the zero display appears.
Put baby on the weighing pan.
Wait until the standstill display appears, then read the
weighing result.
11.2 Taring
22 MBB-M-BA-e-1314
The balance is able to only store one taring value.
When the balance is unloaded the saved taring value is
displayed with negative sign.
To delete the stored tare value, release scales and press
TARE
.
The balance has an integrated standstill function (mean value calculation). This
allows correct weighing determination of a baby although the latter is not keeping still
on the scales.
0
Start balance by pressing
OFF
ON
Wait for the rest position display .
Put baby in the centre of the weighing pan.
Press
HOLD
A triangle starts to flash in the display, during this time the
balance will record several measuring values and will then
display the calculated average value.
By pressing the
HOLD
button several times, the balance
returns to the normal weighing mode.
Press the
HOLD
button once more to repeat this function as
often as required.
There is no average value calculation in the event of too much
movement.
11.3 Hold function (Standstill function)
MBB-M-BA-e-1314 23
12 Error messages
Display
Description
Underload
Weight on weighing pan is too low.
Please increase weight.
If the error message remains inform manufacturer.
The weighing pan was bearing a load during start-up; unload
weighing pan
Overload
Weight on weighing pan too heavy
24 MBB-M-BA-e-1314
13 Service, maintenance, disposal
Do not spray disinfectants onto appliance.
Make sure that disinfectant does not penetrate the interior of
the appliance.
Remove dirt immediately.
13.1 Cleaning
Disconnect the unit from the mains power supply prior to cleaning.
Please do not use aggressive detergents (solvents etc.). Apply soapy water to moist
cloth or use household detergent. Prevent fluid from penetrating into device. Finish
by polishing with dry soft cloth. Remove dirt immediately.
Disinfection
For disinfection the following substances are allowed:
Methylated spirit
2 % Kohrsolin
1% Sokrena solution
5% Sagrotan
5% Gigasept
The prevention of cross-contamination (fungal skin infections,……) requires regular
cleaning of the weighing platform. Recommendation: after a weighing procedure that
could potentially result in contamination (e. g. after weighing that involves direct skin
contact).
13.2 Service, maintenance
The appliance may only be opened by trained service technicians who are
authorized by KERN.
Disconnect the scales before opening.
13.3 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.
MBB-M-BA-e-1314 25
14 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.
Failure:
Possible cause:
The displayed weight
does not glow.
The balance is not switched on.
The mains supply connection has been interrupted
(mains cable not plugged in/faulty).
Check fuse of adapter / glowing green LED next to
fuse
Power supply interrupted.
Batteries are inserted incorrectly or empty
No batteries inserted.
The displayed weight is
permanently changing
Draught/air movement
Table/floor vibrations
The seat surface/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 weighing result is
obviously incorrect
The display of the balance is not at zero.
Adjustment is no longer correct.
Great fluctuations in temperature.
The balance is on an uneven surface.
Electromagnetic fields / static charging (choose
different location/switch off interfering device if
possible)
Should other error messages occur, switch balance off and then on again. If the
error message remains inform manufacturer.
26 MBB-M-BA-e-1314
15 Verification
Verified scales bear a verification mark or one or more seals affixed by the Bureau of
Standards or the manufacturer on or inside the housing which will self-destroy on
removal. This makes it impossible to verify scales without damaging the seals.
15.1 Adjustment
Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization.
In calibrated balances the adjustment function is switch locked.
In order to carry out adjustments, the switch must be turned to
adjustment position (centre position) (see chapter. 16.2).
Display
Operation
Start balance by pressing
OFF
ON
Press for approx. 3 sec,
in the display appears „SETUP“, followed by „UNIT“
Press
TARE
repeatedly until “CAL iB“ appears
Press
HOLD
, „CAL U“ appears
Press
TARE
, the appeared triangle must be located in the
upper left part of the display.
If it is not, press again
TARE
.
MBB-M-BA-e-1314 27
Press
HOLD
repeatedly until “CAL 0“ appears.
Press
TARE
,
the display will show a numeric value.
Then press ,
“CAL 0“ appears.
Press
HOLD
,
“CAL 5“ appears.
Press
TARE
Enter the required size of the adjustment weight (See
Section 1, "Technical Data"):
For this select the digit to be changed
with
HOLD
and the numeric value using
TARE
.
Acknowledge by .
Place the adjustment weight carefully in the centre of the
weighing pan and a numerical value will appear in the
display.
Press
HOLD
, the adjustment process is started.
The balance will automatically return to Weighing mode upon
successful completion of the adjustment and will display the
weight of the adjustment weight.
Take away adjustment weight.
For verified scales, turn off the scales and move the
adjustment switch back to verification position.
28 MBB-M-BA-e-1314
15.2 Adjustment controls and seals
1. Rear
2. Battery compartment
3. Rear of platform
After a verification the balance is sealed at the indicated positions.
Verification of the balance is invalid without the "seal".
Position of the official seals:
MBB-M-BA-e-1314 29
Position of the adjustment switch:
Position of the adjustment
switch
State
1. to left
Not documented
2. concentric
Adjustment position - adjustment possible
3. to right
Verification position - adjustment locked
1 2 3
15.3 Checking the balance verification settings
For the adjustment function, the balance must be switched over to service mode. To
achieve the effect, turn the adjustment switch to adjustment position.
In the service mode all parameters of the balance can be modified. The service
parameters may not be modified, as this could damage the balance settings.
15.3.1 Menu overview in service mode (adjustment switch in adjustment
position)
This overview is merely for checking the parameters set by the appropriate Bureau of
Standards.
Changes may only be made to the parameters for the automatic shut-off function
“ “ and the audio signal “ “.
30 MBB-M-BA-e-1314
15.4 Navigation in the menu
With the balance switched on, keep the button depressed for approx. 3 sec
until "SETUP" is displayed followed by "9rAd".
Press the
TARE
button as often as necessary until the required function is
displayed.
Press the
HOLD
button to confirm the selected function. The first parameter will be
displayed. Press the
HOLD
button to select the required parameter and confirm by
pressing the
TARE
button.
15.4.1 Exit menu and save
Press the
TARE
button repeatedly until "END" appears.
Acknowledge by
HOLD
.
The balance returns automatically into weighing mode.
MBB-M-BA-e-1314 31
Press the [HOLD] and [TARE] buttons to make the selection
* default setting
32 MBB-M-BA-e-1314
Description:
Weighing unit: kg
Partition steps, weighing range (max.) and readout (d)
Multi-range balance/ single-range balance selection
Single-range balance
Multi-range balance
Filter: fast/ normal/ slow
Auto Zero Tracking: 0.25d / 0.5d / 1d / 3d / OFF
Stabilisation range: 0.25d / 0.5d / 1d / 3d / OFF
Zero range: 2% / 100%
Overload range: 9d / 2%
Adjustment
Auto off: 120 sec. / 180 sec. / 240 sec. / 300 sec. / OFF
Audio signal: ON/OFF
Resetting to factory setting (Default setup)
Exit menu
MBB-M-BA-e-1314 33
Personal scales in hospitals
4 year
Personal scales if not used in hospitals
unlimited
Baby weighing scales and mechanical birth weight
scales
4 year
Bed scales
2 year
Wheelchair scales
2 year
Rehab clinics and local health authorities are treated as
hospitals (4 years verification validity).
Not treated as hospitals (verification validity not limited)
are dialysis stations, nursing homes and doctor’s
surgeries.
(Data source: ”Bureau of Standards News, Weighing
Instruments in Medicine“}
15.5 Verification validity period (current status in G)
34 MBB-M-BA-e-1314
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