KERN MBD Series User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-mail: [e-mail]
Phone: +49-[0]7433-9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating Manual
Baby scales
KERN MBD
Version 1.0
2017-08
GB
MBD-BA-e-1710

MBD-BA-e-1710 2
GB
KERN MBD
Version 1.0 2017-08
Operating manual
Baby scales
1Technical data ................................................................................................... 3
2Declaration of conformity................................................................................. 3
3Basic guidelines (general information) ........................................................... 4
3.1 Proper use................................................................................................................ 4
3.2 Improper use............................................................................................................ 4
3.3 Warranty................................................................................................................... 5
3.4 Monitoring of test resources................................................................................... 5
4Basic safety instructions.................................................................................. 5
4.1 Observance of the instructions contained in the Operating Manual.................... 5
5Transport and storage ...................................................................................... 5
5.1 Verification upon acceptance ................................................................................. 5
5.2 Packaging................................................................................................................. 5
6Unpacking, setup and start-up......................................................................... 6
6.1 Site of installation, location of use......................................................................... 6
6.2 Unpacking ................................................................................................................ 6
6.2.1 Scales setup ...................................................................................................................... 6
6.2.2 Scope of delivery ............................................................................................................... 6
6.3 Battery operation (inserting and removing the batteries)..................................... 6
6.4 Initial start-up........................................................................................................... 7
7Operation ........................................................................................................... 7
7.1 Display...................................................................................................................... 7
7.2 Keyboard overview.................................................................................................. 7
8Operation ........................................................................................................... 8
8.1 Weighing .................................................................................................................. 8
8.2 Taring ....................................................................................................................... 8
8.3 Switching the weight units...................................................................................... 9
8.4 Memory function...................................................................................................... 9
8.5 HOLD function ........................................................................................................10
8.6 Auto-Off...................................................................................................................11
9Error messages ............................................................................................... 11
10 Servicing, maintenance and disposal........................................................ 11
10.1 Cleaning ..................................................................................................................11
10.2 Servicing and maintenance....................................................................................11
10.3 Disposal...................................................................................................................11
11 Assistance in case of minor failures.......................................................... 12

3 MBD-BA-e-1710
1 Technical data
KERN MBD 20K2
Readability 0.01 kg
Weighing range (Max) 15 kg
Reproducibility 0.01 kg
Linearity 0.01 kg
Units kg/lb
Stabilisation time
2–3 s
Warm-up time 10 min
Operating temperature +10°C …. +40°C
Auto-Off 20 s
Power supply battery operation: 2 x 1.5 V, type AAA
operation time: 20 h
Air humidity max. 80% (non-condensing)
Dimensions,
completely assembled
(W x D x H) mm 597 × 350 × 74 mm
Weighing pan, mm 650 × 350 × 55 mm
Weight kg (net) 2.0 kg
2 Declaration of conformity
Current EC/EU Declaration of Conformity is available online at:
www.kern-sohn.com/ce

MBD-BA-e-1710 4
3 Basic guidelines (general information)
3.1 Proper use
The scales are used to determine the weight of babies in a lying position; they are
intended for private use. Using the scales in medicine is not allowed.
In order to weigh the baby, put it on the weighing pan. The weight value can be read
out once it is stabilised.
An authorised person must check for proper condition of the scales prior to each use.
Additional information on the baby scales:
Baby scales are intended for the weighing of children in a lying position. If the child is
to be weighed in a sitting position, place it in the centre of the weighing pan.
You must continuously observe the baby placed on the weighing pan to
avoid falling. Proceed according to the guideline placed on the weighing
pan!
3.2 Improper use
Do not expose the weighing pan to a prolonged load. It may cause damage to the
measuring mechanism.
Always avoid impacts and overloads of the scales exceeding the specified maximum
(Max) load by reducing the existing load with a tare. An impact or overload could re-
sult in damage to the scales.
Never use the scales in potentially explosive areas. The serial product version is not
explosion-proof.
Do not introduce any structural modifications to the scales. It may cause incorrect
weighing results, violation of technical safety conditions and may result in destruction
of the scales.
The scales must only be operated in accordance with the guidelines specified above.
Other scopes/fields of use must be approved by KERN in writing.

5 MBD-BA-e-1710
3.3 Warranty
The warranty expires in the following cases:
the instructions contained herein are not observed;
the scales are not used as intended;
the scales are modified or opened;
mechanical damage or damage caused by utilities or liquids;
natural wear and tear;
improper setting or incorrect electrical system;
the measuring mechanism is overloaded;
the scales fall.
3.4 Monitoring of test resources
As part of the quality assurance system, the technical measuring properties of the
scales and (if applicable) the testing weight should be checked at regular intervals.
To this end, the user responsible should determine an appropriate cycle, type and
scope of such check. Information regarding the monitoring of test resources (scales
and test weights) is available at KERN website (www.kern-sohn.com). The test
weights and scales can be calibrated quickly and cheaply at KERN calibration labora-
tory accredited by DKD (Deutsche Kalibrierdienst) (in reference to the national
standard).
4 Basic safety instructions
4.1 Observance of the instructions contained in the Operating Manual
Carefully read this Operating Manual before setting and starting the appliance, even
if you are already familiar with KERN balances.
5 Transport and storage
5.1 Verification upon acceptance
Immediately check the received package for visible external damage — the same
applies to the device after unpacking.
5.2 Packaging
Keep all parts of the original packaging for any possible return transport.
Only use the original packaging for return transport.
Prior to dispatch, disconnect all cables and remove any loose/mobile parts.
Install the transport protecting devices, if any. Protect all parts (such as the weighing
platform, power unit, stand, operating panel, etc.) against slipping and damage.

MBD-BA-e-1710 6
6 Unpacking, setup and start-up
6.1 Site of installation, location of use
The scales are designed in such a way that reliable weighing results are ensured in
normal conditions of use.
The scales will operate accurately and fast if you choose the right location.
Therefore, observe the following rules when choosing the installation site:
Place the scales on a stable and flat surface.
Avoid extreme temperatures and temperature fluctuations that exist e.g. if the
scales are located by a heater or in a place exposed to direct sunlight.
Protect the scales against direct draughts due to open windows and doors.
Avoid shocks during weighing.
Protect the scales against high humidity, vapours and dust.
Do not expose the device to long periods of extreme humidity. Undesired dew
(condensation of air moisture on the appliance) may occur if the cold appli-
ance is placed in a considerably warmer environment. In this case, acclimatize
the device for approx. 2 h at the ambient temperature.
Avoid static charge of the scales and persons to be weighed.
Avoid contact with water.
Major indication deviations (incorrect weighing results) may occur in case of electro-
magnetic fields, static charges or unstable power supply. In such a case, change the
location.
6.2 Unpacking
Carefully remove the complete scales or individual parts thereof from the packaging
and place it in the intended location. If the power unit is used, the power cable may
not pose a tripping hazard.
6.2.1 Scales setup
The weighing pan must be in a perfectly horizontal position.
6.2.2 Scope of delivery
Serial accessories:
•Operating Manual
•Batteries (2 x 1.5V AAA batteries)
6.3 Battery operation (inserting and removing the batteries)
The battery compartment is located at the bottom.
Turn the scales and remove the cover from the battery compartment. Insert the bat-
teries according to their polarity (observe the marking at the bottom of the battery
compartment).
Close the battery compartment and turn the scales again.

7 MBD-BA-e-1710
When the batteries are discharged, the display will indicate “bAtt” – in this case re-
place the batteries.
If the scales are not used for a long time, remove the batteries and store them sepa-
rately. Any electrolyte flowing out could damage the scales.
6.4 Initial start-up
To obtain accurate weighting results using the electronic balances, the devices must
reach an appropriate operating temperature (see Chapter 1: “Warm-up time”). The
scales must be turned on during warming.
The scales accuracy depends on the local acceleration of gravity.
7 Operation
7.1 Display
7.2 Keyboard overview
ON/OFF
Switching on/off
TARE Taring the scales
M+ Memorising the weight values
MC Displaying the memorised weight value
HOLD
HOLD function

MBD-BA-e-1710 8
8 Operation
8.1 Weighing
Start the scales by pressing ON/OFF. After the self-test, the device shows the
zero value – it is now in the weighing mode.
Carefully place the baby on the weighing pan and read the weighing value.
(Example)
8.2 Taring
The specific weight of any preload used for weighing can be tared by pressing the
button – during the subsequent weighing processes the scales will display the actual
weight of the baby.
Place an object (e.g. a towel or pad) on the weighing pan. Wait until the “unsta-
ble” (  ) symbol disappears.
(Example)
Press TARE, the device will display the zero value.
Place the baby on the weighing pan. Wait until the “unstable” (  ) symbol disap-
pears and then read the weighing result.
Once the scales are unloaded, the tare value will be displayed with a negative
value sign.
(Example)

9 MBD-BA-e-1710
8.3 Switching the weight units
If zero is indicated, wait until the “unstable” (  ) symbol disappears. Press
TARE. The weight unit will be switched (kg ↔lb), you may now start the next
weighing process.
8.4 Memory function
The scales are provided with an integrated memory function that allows to memorise
the weight values and display them when necessary.
Memorising the weight values:
Start the scales by pressing ON/OFF and wait until the zero value appears.
Place the baby on the weighing pan.
Wait until the “unstable” (  ) symbol disappears.
Press M+, the weight value will be memorised. The symbol will be shown
for 5 s, and then it will disappear.
M+
↓
 5 s
↓

MBD-BA-e-1710 10
Displaying the memorised weight value:
Press MC, the display will show the memorised weight value along with the
symbol displayed for 5 s. Then the current weight value will be displayed.
↨ MC  5 s
The memorised weight value will be stored in the memory until a new value is memo-
rised or the battery is discharged.
8.5 HOLD function
The scales are provided with an integrated HOLD (indication of average value) func-
tion. It allows for a precise weighing of a baby also when it does not lie calmly on the
weighing pan.
Start the scales by pressing ON/OFF and wait until the zero value appears.
Wait until the “unstable” (  ) symbol disappears.
Place the baby on the weighing pan.
Wait until the “unstable” (  ) symbol disappears.
Press HOLD, the weight of the baby will be displayed and “frozen”.
For 5 s, the device will display the difference between the “frozen” and the memo-
rised weight value.
The for 5 s the device will show the difference value and the current value.
If the value is negative, the indication will not be frozen.
The frozen weight value can be removed by pressing HOLD again – the scales will
be switched back to the weighing mode.
The weight can be locked only, when the weight is over than 1 kg.