KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Phone: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating manual
Platform balances
KERN EOA
Version 1.0
10/2013
GB
EOA-BA -e-1310
GB
KERN EOA
Version 1.0 10/2013
Operating manual
Platform balances
Contents
1 Technical data ................................................................................................ 3
2 Declaration of conformity ............................................................................. 5
3 Basic Information (General) .......................................................................... 6
3.1 Proper use ................................................................................................................ 6
3.2 Improper Use ........................................................................................................... 6
3.3 Warranty ................................................................................................................... 6
3.4 Monitoring of Test Resources ................................................................................ 7
4 Basic Safety Precautions .............................................................................. 7
4.1 Pay attention to the instructions in the Operation Manual ................................... 7
4.2 Personnel training ................................................................................................... 7
5 Transport and storage ................................................................................... 7
5.1 Testing upon acceptance ........................................................................................ 7
5.2 Packaging / return transport ................................................................................... 7
6 Unpacking, Setup and Commissioning ....................................................... 8
6.1 Installation Site, Location of Use ........................................................................... 8
6.2 Unpacking ................................................................................................................ 8
6.2.1 Placing ........................................................................................................................................ 8
6.2.2 Scope of delivery ........................................................................................................................ 9
6.2.3 Basic structure ............................................................................................................................ 9
6.3 Battery operation (Standard) .................................................................................. 9
6.4 Mains connection (optional) ................................................................................... 9
6.5 Initial Commissioning ............................................................................................. 9
6.6 Adjustment ..............................................................................................................10
6.7 Adjustment ..............................................................................................................10
7 Operation ...................................................................................................... 11
7.1 Keyboard overview .................................................................................................11
7.2 Weighing .................................................................................................................12
7.3 Taring ......................................................................................................................12
7.4 Plus/minus weighing ..............................................................................................13
8 Servicing, maintenance, disposal .............................................................. 14
8.1 Cleaning ..................................................................................................................14
8.2 Servicing, maintenance ..........................................................................................14
8.3 Disposal...................................................................................................................14
9 Instant help ................................................................................................... 15
2 EOA-BA-e-1310
KERN
EOA 10K-3
EOA 30K-2
Readability (d)
0.005 kg
0.01 kg
Weighing range (max)
15 kg
35 kg
Reproducibility
0.005 kg
0.01 kg
Linearity
± 0.025 kg
± 0.05 kg
Warm-up time
10 minutes
Weighing Units
kg
Recommended adjustment weight,
not added (class)
10 kg
(M2)
20 kg
( M2 )
Stabilization time (typical)
3 sec.
Operating temperature
+ 10° C ... + 35° C
Humidity of air
max. 80 % (not condensing)
Weighing plate mm
315 x 305
Electric Supply
Input Voltage: 15 V / 600 mA
Battery
9 V block
Operating period: 60 h
Auto-off
3 minutes
Weight kg (net)
3
1 Technical data
EOA-BA-e-1310 3
KERN
EOA 50K-2
EOA 100K-2
Readability (d)
0.02 kg
0.05 kg
Weighing range (max)
60 kg
150 kg
Reproducibility
0.02 kg
0.05 kg
Linearity
± 0.1 kg
± 0.25 kg
Warm-up time
10 minutes
Weighing Units
kg
Recommended adjustment weight,
not added (class)
40 kg
(M1)
100 kg
(M1)
Stabilization time (typical)
3 sec.
Operating temperature
+ 10° C ... + 35° C
Humidity of air
max. 80 % (not condensing)
Weighing plate mm
315 x 305
Electric Supply
Input Voltage: 15 V / 600 mA
Battery
9 V block
Operating period: 60 h
Auto-off
3 minutes
Weight kg (net)
3
4 EOA-BA-e-1310
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postbox 4052
E-Mail: info@kern-sohn.de
Phone: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
D
Konformitätserklärung
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht,
mit den nachstehenden Normen übereinstimmt.
EN
Declaration of
conformity
We hereby declare that the product to which this declaration refers conforms
to the following standards.
CZ
Prohlášení o
shode
Tímto prohlašujeme, že výrobek, kterého se toto prohlášení týká, je v souladu
s níže uvedenými normami.
E
Declaración de
conformidad
Manifestamos en la presente que el producto al que se refiere esta
declaración está de acuerdo con las normas siguientes
F
Déclaration de
conformité
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la
présente déclaration, est conforme aux normes citées ci-après.
I
Dichiarazione di
conformitá
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si
riferisce è conforme alle norme di seguito citate.
NL
Conformiteitverklaring
Wij verklaren hiermede dat het product, waarop deze verklaring betrekking
heeft, met de hierna vermelde normen overeenstemt.
P
Declaração de
conformidade
Declaramos por meio da presente que o produto no qual se refere esta
declaração, corresponde às normas seguintes.
PL
Deklaracja
zgodności
Niniejszym oświadczamy, że produkt, którego niniejsze oświadczenie dotyczy,
jest zgodny z poniższymi normami.
RUS
Заявление о
соответствии
Мы заявляем, что продукт, к которому относится данная декларация,
соответствует перечисленным ниже нормам.
EU Directive
Standards
2004/108/EC
EN 61326-1: 2006
EN 61326-2-2: 2006
EN 61000-3-2: 2006
EN 61000-3-3: 2008
2006/95/EC
EN 60950-1: 2006+A11: 2009
Signatur
Signature
Datum
Date
23.09.2013
Ort der Ausstellung
Place of issue
72336 Balingen
Albert Sauter
KERN & Sohn GmbH
Geschäftsführer
Managing director
KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0
Fax +49-[0]7433/9933-149, E-Mail: info@kern-sohn.com, Internet: www.kern-sohn.com
2 Declaration of conformity
Declaration of conformity
EC-Konformitätserklärung EC-Declaration of -Conformity
EC- Déclaration de conformité EC-Declaración de Conformidad
EC-Dichiarazione di conformità EC-Conformiteitverklaring
EC- Declaração de conformidade EC- Prohlášení o shode
EC-Deklaracja zgodności EC-Заявление о соответствии
Electronic Balance: KERN KERN EOA
EOA-BA-e-1310 5
3 Basic Information (General)
3.1 Proper use
The balance you purchased is intended to determine the weighing value of material
to be weighed. It is intended to be used as a “non-automatic balcance”, i.e. the
material to be weighed is manually and carefully placed in the centre of the weighing
pan.. As soon as a stable weighing value is reached the weighing value can be read.
3.2 Improper Use
Do not use balance for dynamic weighing. 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“. (Example: Slowly draining fluids from a
container on the balance.)
Do not leave permanent load on the weighing pan. This may damage the measuring
system.
Impacts and overloading exceeding the stated maximum load (max) of the balance,
minus a possibly existing tare load, must be strictly avoided. Balance may be
damage by this.
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.
3.3 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
6 EOA-BA-e-1310
Carefully read this operation manual before setup and
commissioning, even if you are already familiar with KERN balances.
All language versions contain a non-binding translation.
The original German is binding.
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 glass wind screen, the
weighing platform, power unit etc. against shifting and
damage.
3.4 Monitoring of Test Resources
In the framework of quality assurance the measuring-related properties of the
balance 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.
4 Basic Safety Precautions
4.1 Pay attention to the instructions in the Operation Manual
4.2 Personnel training
The appliance may only be operated and maintained by trained personnel.
5 Transport and storage
5.1 Testing upon acceptance
When receiving the appliance, please check packaging immediately, and the
appliance itself when unpacking for possible visible damage.
5.2 Packaging / return transport
EOA-BA-e-1310 7
6 Unpacking, Setup and Commissioning
6.1 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:
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 disconnected appliance for ca. 2 hours at room
temperature.
Avoid static charging of the material to be weighed, weighing container and
windshield.
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. Change location or remove
source of interference.
6.2 Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
6.2.1 Placing
The balance must be installed in a way that the weighing plate is exactly in horizontal
position.
8 EOA-BA-e-1310
Balance with weighing plate and display unit
Operating manual
Battery
6.2.2 Scope of delivery
Serial accessories:
6.2.3 Basic structure
Place the balance on a horizontal and solid base.
Remove lamination sheet from weighing plate or display unit if existing.
6.3 Battery operation (Standard)
If the battery is used up, remove battery cover form the lower side of the balance and
exchange the battery. Reinsert the battery cover.
In order to save the battery, the balance switches automatically off after 3 minutes
without weighing.
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.
6.4 Mains connection (optional)
Power is supplied via the external mains adapter. The stated voltage value must be
the same as the local voltage.
Only use original KERN mains adapters. Using other makes requires consent by
KERN.
6.5 Initial Commissioning
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).
The accuracy of the balance depends on the local acceleration of gravity.
Strictly observe hints in chapter Adjustment.
EOA-BA-e-1310 9
6.6 Adjustment
Operation
Display
Start balance by pressing .
Await zero display
Press and keep it pressed, [CAL] is
displayed
After approx.5 seconds appears automatically the size
of the recommended adjustment weight
(example)
Place adjustment weight in the middle of the weighing
plate, short time later [F] will appear.
Afterwards the balance automatically jumps back to
weighing mode. In the display there appears the value of
the adjustment weight.
(example)
As the acceleration value due to gravity is not the same at every location on earth,
each balance must be coordinated - in compliance with the underlying physical
weighing principle - to the existing acceleration due to gravity at its place of location
(only if the balance has not already been adjusted to the location in the factory). This
adjustment process must be carried out for the first commissioning, after each
change of location as well as in case of fluctuating environment temperature. To
receive accurate measuring values it is also recommended to adjust the balance
periodically in weighing operation.
6.7 Adjustment
The adjustment should be made with the recommended adjustment weight (see
chap. 1 "Technical data"). Weights of different nominal values may be used for
adjustment but are not optimal for technical measuring.
Procedure when adjusting:
Observe stable environmental conditions. A warming up time (see chapter 1) is
required for stabilization.
An error during adjustment or the use of an incorrect adjusting weight will result in an
error message „CAL E“. Repeat adjustment.
Keep the adjustment close to the balance. Daily control of the weighing exactness is
recommended for quality-relevant applications.
10 EOA-BA-e-1310
Button
Description
Function
ON/OFF button
Switch on-off balance
TARE button
short pressing: Tare balance
long pressing: Invoke adjustment
7 Operation
7.1 Keyboard overview
EOA-BA-e-1310 11
Operation
Display
Start balance by pressing .
Await zero display
Place goods onto weighing plate.
Now the weight is displayed, after the standstill control
appears the weighing unit [kg] right-hand in the display.
(example)
If the material to be weighed is heavier than the weighing
range, the display will show [E] (=Overload).
Operation
Display
Turn on weighing scale and wait for zero to
be displayed.
Place the tare vessel (ex. 3kg) on the weighing plate
and press the button.
The balance display goes to [0].
(example)
Put the sample into the tare vessel.
Weight of sample is indicated.
(example)
If after finishing the weighing process the
button is pressed again, [0] appears anew in the
display.
7.2 Weighing
7.3 Taring
The taring process can be repeated any number of times, e.g. when adding several
components for a mixture (adding).
The limit is reached when the whole weighing range is exhausted.
After removing the taring container the total weight is displayed as negative display.
By pressing the button again, the balance returns to „0“.
12 EOA-BA-e-1310
Operation
Display
Turn on weighing scale and wait for zero to
be displayed.
Put the nominal weight on the weighing plate and tare
to [0] using the button.
(example)
Remove the nominal weight.
The nominal weight appears as negative display.
(example)
Put the test objects subsequently on the weighing
plate, the respective deviation from the nominal weight
is displayed with the respective sign to „+“ and „-“.
(example)
Back to weighing mode by pressing the
button and with unloaded weighing plate
7.4 Plus/minus weighing
EOA-BA-e-1310 13
8 Servicing, maintenance, disposal
Before any maintenance, cleaning and repair work disconnect the
appliance from the operating voltage.
8.1 Cleaning
Please do not use aggressive cleaning agents (solvents or similar agents), but a
cloth dampened with mild soap suds. Ensure that no liquid penetrates into the
device. Polish with a dry soft cloth.
Spilled weighing goods must be removed immediately.
8.2 Servicing, maintenance
The appliance may only be opened by trained service technicians who are
authorized by KERN.
Before opening, disconnect from power supply.
8.3 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.
14 EOA-BA-e-1310
Fault
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).
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 weighing plate is in contact with
foreign matter.
Electromagnetic fields / static charging
(choose different location/switch off
interfering device if possible)
The weighing value is obviously
wrong
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)
9 Instant help
In case of an error in the program process, briefly turn off the balance and
disconnect from power supply. The weighing process must then be restarted from
the beginning.
Help:
Should other error messages occur, switch balance off and then on again. If the error
message remains inform manufacturer.
EOA-BA-e-1310 15
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