KERN EOB 6K2M, EOB 15K5M, EOB 60K20M, EOB 30K10M, EOB 150K50M Operating Instructions Manual
KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instruction
Platform scale
KERN EOB_M
Version 1.0
07/2007
GB
EOB_M-BA-e-0710
EOB_M-BA-e-0710
2
GB
KERN EOB_M
Version 1.0 07/2007
Operating instruction
Platform scale
Contents
1 Technical data__________________________________________________ 4
2 Declaration of conformity ________________________________________ 6
3 Basic Information (General)_______________________________________ 8
3.1 Intended use _____________________________________________________ 8
3.2 Improper Use ____________________________________________________ 8
3.3 Warranty ________________________________________________________ 8
3.4 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
5 Transport and storage ___________________________________________ 9
5.1 Testing upon acceptance __________________________________________ 9
5.2 Packaging _______________________________________________________ 9
6 Unpacking, Setup and Commissioning _____________________________ 9
6.1 Installation Site, Location of Use ____________________________________ 9
6.2 Placing_________________________________________________________ 10
6.2.1 Unpacking___________________________________________________________ 10
6.2.2 Scope of delivery _____________________________________________________ 10
6.2.3 Assembly instructions for use of wall mounting ______________________________ 10
6.2.4 Assembly instruction for use of tripod KERN EOB-A01 (option) _________________ 11
6.3 Mains connection ________________________________________________ 11
6.4 Battery operation ________________________________________________ 11
6.5 Initial Commissioning ____________________________________________ 12
6.6 Adjustment _____________________________________________________ 12
6.6.1 Procedure when adjusting ______________________________________________ 12
6.7 Verification _____________________________________________________ 14
6.8 Adjustment switch and seals ______________________________________ 15
6.9 Checking scale settings with respect to the calibration of weighing scales 16
6.9.1 Menu overview in service mode (adjustment switch in adjustment position) ________ 16
6.9.2 Menu overview for calibrated scales (adjustment switch in calibrating position) _____ 19
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7 Operation_____________________________________________________ 20
7.1 Overview of display ______________________________________________ 20
7.2 Keyboard overview_______________________________________________ 21
7.3 Weighing _______________________________________________________ 21
7.4 Taring__________________________________________________________ 21
7.5 Hold function (animal weighing function) ____________________________ 22
7.6 Plus/minus weighings ____________________________________________ 22
8 Service, maintenance, disposal___________________________________ 23
8.1 Cleaning _______________________________________________________ 23
8.2 Service, maintenance_____________________________________________ 23
8.3 Disposal________________________________________________________ 23
9 Instant help ___________________________________________________ 24
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1 Technical data
KERN EOB 6K2M EOB 15K5M EOB 30K10M
Readability (d) 2 g 5 g 10 g
Weighing range (max) 6 kg 15 kg 30 kg
Minimum load (Min) 40 g 100 g 200 g
Verification value (e) 2 g 5 g 10 g
Verification class III III III
Reproducibility 2 g 5 g 10 g
Linearity 4 g 10 g 20 g
Recommended adjust-
ment weight, not added
(class)
5 kg
(M3)
10 kg
(M3)
20 kg
(M3)
Stabilization time (typical) 2 – 3 sec.
Warm-up time 10 min
Operating temperature + 5° C …. + 35° C
Mains adapter 300 mA/15V
Electric Supply
Battery operated 6 x 1.5V, AA size
Service life 60 h
Auto Off After 3 min without change of load
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm
290 x 270 x 50 (platform)
210 x 110 x 45 (terminal)
Weighing plate mm 290 x 270
Weight kg (net) 3,6
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KERN EOB 60K20M EOB 150K50M
Readability (d) 20 g 50 g
Weighing range (max) 60 kg 150 kg
Minimum load (Min) 400 g 1000 g
Verification value (e) 20 g 50 g
Verification class III III
Reproducibility 20 g 50 g
Linearity 40 g 100 g
Recommended adjust-
ment weight, not added
(class)
40 kg (M3) 100 kg (M3)
Stabilization time (typical)
2 – 3 sec.
Warm-up time 10 min
Operating temperature + 5° C …. + 35° C
Mains adapter 300 mA/15V
Electric Supply
Battery operated 6 x 1.5V, AA size
Service life 60 h
Auto Off After 3 min without change of load
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 290 x 270 x 50 (platform)
210 x 110 x 45 (terminal)
Weighing plate mm 290 x 270
Weight kg (net) 3,6
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2 Declaration of conformity
KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postfach 4052
E-Mail: info@kern-sohn.de
Tel: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Declaration of conformity
Declaration of conformity for apparatus with CE mark
Konformitätserklärung für Geräte mit CE-Zeichen
Déclaration de conformité pour appareils portant la marque CE
Declaración de conformidad para aparatos con disitintivo CE
Dichiarazione di conformità per apparecchi contrassegnati con la marcatura CE
English
We hereby declare that the product to which this declaration refers conforms with the following standards.
Deutsch
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den nachstehenden Normen übereinstimmt.
Français
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.
Español
Manifestamos en la presente que el producto al que se refiere esta declaración está de
acuerdo con las normas siguientes
Italiano
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è conforme alle norme di seguito citate.
Electronic Scale: KERN EOB_M
Mark applied EU Directive Standards
89/336/EEC EMC
EN 61000-6-3: 2001+ A11:2004
EN 61000-6-1: 2001
Date: 10.05.2007 Signature:
Gottl. KERN & Sohn GmbH
Management
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
EOB_M-BA-e-0710
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KERN & Sohn GmbH
D-72322 Balingen-Frommern
Postfach 4052
E-Mail: info@kern-sohn.de
Tel: 0049-[0]7433- 9933-0
Fax: 0049-[0]7433-9933-149
Internet: www.kern-sohn.de
Declarations of conformity
Declaration of conformity for apparatus with CE mark
Konformitätserklärung für Geräte mit CE-Zeichen
Déclaration de conformité pour appareils portant la marque CE
Declaración de conformidad para aparatos con marca CE
Dichiarazione di conformità per apparecchi contrassegnati con la marcatura CE
English
We hereby declare that the product to which this declaration refers conforms with the following standards.
This declaration is only valid with the certificate of conformity by a notified body.
Deutsch
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den nachstehenden Normen übereinstimmt.
Diese Erklärung gilt nur in Verbindung mit der Konformitätsbescheinigung einer
benannten Stelle.
Français
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.
Cette déclaration est valide seulement avec un certificat de conformité d’un orga-
nisme notifié.
Español
Manifestamos en la presente que el producto al que se refiere esta declaración está de
acuerdo con las normas siguientes.
Esta declaración solo será válida acompañada del certificado de conformidad de
conformidad de la parte nominal.
Italiano
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è conforme alle norme di seguito citate.
Questa dichiarazione sarà valida solo se accompagnata dal certificato di conformità
della parte nominale.
Electronic Scale: KERN EOB_M
EU Directive Standards EC-type-approval certificate no. Issued by
90/384/EEC EN 45501 T7183 NMI
Date: 10.05.2007
Signature:
Gottl. KERN & Sohn GmbH
Management
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-07433/9933-0,Fax +49-074433/9933-149
EOB_M-BA-e-0710
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3 Basic Information (General)
3.1 Intended 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“ balance, i.e. the material to be weighed is manually and carefully placed in the centre of the weighing plate.
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“ 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.
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
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.
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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 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
Keep all parts of the original packaging in case you need to return the appliance.
Only use original packaging for returning.
Before sending, disconnect all connected cables and loose/movable parts.
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.
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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.
6.2 Placing
The balance must be installed in a way that the weighing plate is exactly in horizontal
position.
6.2.1 Unpacking
Carefully remove the balance from the packaging, remove plastic cover and setup
balance at the intended workstation.
6.2.2 Scope of delivery
Serial accessories:
• Platform (stainless steel weighing plate) and display unit
• Mains power supply
• Wall mounting (incl. fastening screws)
• Operating Manual
6.2.3 Assembly instructions for use of wall mounting
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6.2.4 Assembly instruction for use of tripod KERN EOB-A01 (option)
Attach the tripod, using the 4 screws, to the underside of the weighing scales
Remove the two lateral rubber stoppers from the display unit
Attach the display unit to the mounting by using the two knobs.
Position the display unit with the help of the knobs
Picture: Example model KERN EOB
6.3 Mains connection
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.
6.4 Battery operation
Remove the battery cover from the underside of the display unit. Connect the 6 x
1,5V round cells. Reinsert the battery cover.
In order to save the battery, the balance switches automatically off after 3 minutes
without weighing. Additional switch-off times can be set in the menu (function
“A.OFF“), see chpt. 6.91, and 6.9.2. respectively.
Used batteries are indicated by “LO“ on the display. Press [ON/OFF] key and replace
the batteries immediately.
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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6.5 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.
6.6 Adjustment
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 during the initial start-up, after change in location and variation of surrounding temperature. To receive accurate measuring values it is also recommended to adjust the balance periodically in weighing operation.
With an adjustment weight, the weighing accuracy can be checked and re-adjusted
at any time.
6.6.1 Procedure when adjusting
Observe stable environmental conditions. A warming up time (see chapter 1) is required for stabilization.
Attention:
In calibrated balances the adjustment function is switch locked. To carry out adjustments, set the switch to adjustment position (centre position). (See chpt. 6.8).
Operation Display
Turn on balance by pressing the [ON/OFF] key.
a
z000
Press the [→0←]-key for c. 3 sec until “SETUP“, followed by “UNIT“ appears
SETUP
UNKT
Press the [ TARE ]-key repeatedly until “CAL ib“ appears
CAL
K
B
Press the [HOLD]-key
CAL U
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Press the [TARE] key.
The superimposed triangle W must be at the right hand
top corner. If not, press the [ TARE ]-key.
Press the [HOLD]-key repeatedly until “CAL
0“appears.
CAL U
CAL O
Press the [ TARE ]-key, a numeric value is shown on
the display.
After that press the [→0←]-key.
30770
CAL O
Press the [HOLD]-key
CAL 5
Press the [TARE] key.
Enter the required size of the adjustment weight (See
chpt. 1, “specifications“): To select the digit to be
changed, press the [HOLD]-key and to select the numeric value, press the
[ TARE ]-key.
u000
Confirm by pressing the [→0←]-key.
0
Place the adjustment weight carefully in the centre of
the weighing platform; the display shows a numeric
value. Press the [HOLD]-key. The adjustment process
is started.
82077
If the adjustment was successful the weighing scales
will return automatically to weighing mode and will
show the weighing value of the adjustment weight.
Take away adjustment weight.
u000
Notice:
For calibrated scales turn off the scales and reset the adjustment switch to calibrating position.
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6.7 Verification
General introduction:
According to EU directive 90/384/EEC balances must be officially verified if they are
used as follows (legally controlled area):
a) For commercial transactions if the price of goods is determined by weighing.
b) For the production of medicines in pharmacies as well as for analyses in the
medical and pharmaceutical laboratory.
c) For official purposes
d) For manufacturing final packages
In cases of doubt, please contact your local trade in standard.
Verification instructions
An EU type approval exists for balances described in their technical data as
verifiable. If a balance is used where obligation to verify exists as described above, it
must officially verified and re-verified in regular intervals.
Re-verification of a balance is carried out according to the respective national regulations. The validity for verification of balances in Germany is e.g. 2 years.
The legal regulation of the country where the balance is used must be observed!
Balances with obligation to verify must be taken out of operation if:
- The weighing result of the balance is outside the error limit. Therefore,
in regular intervals load balance with known test weight (ca. 1/3 of the max.
load) and compare with displayed value.
- The reverification deadline has been exceeded.
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6.8 Adjustment switch and seals
After verification the balance is sealed at the indicated positions.
Verification of the balance is invalid without the "seal".
Position of the official seals:
1. Rear side
2. Seal mark in the battery compartment
Seal mark
Seal mark
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Position of adjustment switch:
Position of adjustment switch Status
1. to the left Not documented
2. concentric adjustment position – enables adjustment
3. to the right Verification position - Adjustment locked
6.9 Checking scale settings with respect to the calibration of weighing scales
For the adjustment function, the balance must be switched over to the service mode.
To achieve this, set the adjustment switch to adjustment position (See chpt. 6.8).
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.
6.9.1 Menu overview in service mode (adjustment switch in adjustment position)
This overview exists merely for the examination of the set parameters by
the authorized Verification Standards Department.
Changes may only be made to the parameters of the automatic switch-off function
“A.OFF“ and the acoustic signal ”BURR“.
Navigation in the menu:
With the weighing scales switched on, press the [→0←]-key for c. 3 sec until
“SETUP“, followed by ”UNIT“ appears.
Press the [ TARE ]-key repeatedly until the desired function appears.
Confirm the selected function by pressing the [HOLD]-key. The first parameter
appears. To select the desired parameter, use the [HOLD]-key and confirm by
pressing the [TARE]-key.
1 2 3
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To exit the menu and to store, press the [ TARE ]-key repeatedly until “END“ appears, then confirm by pressing the [HOLD]-key. The balance returns automatically
into weighing mode.
A selection is made by pressing the [HOLD]-key and the [ TARE]-key
* default setting
*
*
*
*
*
*
*
*
*
*
*
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Description:
Weighing unit: Kg
Dividing steps, weighing range (max) and readability (d)
Selection multi-range scales / single range scales
Single-range scales
Multi-range scales
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
Reset to default settings (default setup)
Exit menu
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6.9.2 Menu overview for calibrated scales (adjustment switch in calibrating
position)
With the weighing scales switched on, press the [→0←]-key for c. 3 sec until
“SETUP“ followed by “A.OFF“ appears.
A parameter selection is made by pressing the [ TARE] -key and the [HOLD] -
key.
Press the [HOLD] -key and return to the Normal-Mode.
SETUP
A.OFF
120
180
OFF
240
300
OFF
BURR
0n
END
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7 Operation
7.1 Overview of display
No. Display Description
1
[→0←]
Balance zero display
If the scales do not display exactly zero despite the
scales being without a load, press the [→0←]-key. Your
balance will be set to zero after a short standby time.
2
[ο]
Stability display:
If the display shows the stability display [ο] the balance
is in a stable status. The [ο] indication disappears if the
condition is unstable.
3 Lit up when power is supplied via line adapter
4 HOLD
S
Hold/animal weighing function active
5 NET
S
Stored tare value
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7.2 Keyboard overview
Key Description
ON/OFF
Turn on/off balance
0
Set scales to zero
HOLD
Hold/animal weighing function
TARE
Tare scales
7.3 Weighing
Turn on balance by pressing the [ON/OFF] key. The balance will carry out a
self-test Your balance is ready to weigh as soon as the “0.00 oz" display
appears.
Information: The [→0←] key can be used to set the balance to zero at any
time.
Place goods to be weighed on balance. Wait until the standstill display (o) ap-
pears, then read the weighing result.
Note:
If the material to be weighed is heavier than the weighing range, the display will show
"Err" (=Overload).
7.4 Taring
The dead weight of any weighing container may be tared away by pressing a button,
so that the following weighings show the net weight of the goods to be weighed.
Place empty tare container on the weighing plate. The total weight of the
container is displayed.
To start the taring process press the [TARE] key. The weight of the con-
tainer is now internally saved.
Place the goods to be weighed into the tare container.
Read the weight of the goods on the display.
Information:
The balance is able to only store one taring value at a time.
When the balance is unloaded the saved taring value is displayed with negative sign.
Remove all items from the weighing plate in order to delete the stored tare value and
subsequently press the [TARE] key.
The taring process can be repeated any number of times. The limit is reached when
the whole weighing range is exhausted.
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7.5 Hold function (animal weighing function)
The balance has an integrated animal weighing function (mean value calculation).
This allows the exact weighing of pets or small animals (load min 1% of max) whilst
the aforesaid are not perfectly still on the weighing platform.
Note: Movement that is too lively (strong display variations) makes a
mean value calculation impossible.
Turn on balance by pressing the [ON/OFF] key. The balance will carry out a
self-test Your balance is ready to weigh as soon as the “0.00 g" display appears.
Press the [HOLD]-key. The triangle starts flashing on the display whilst the
scales gather several measuring values during this time. Afterwards the calculated mean value is shown.
To reset the weighing scales to normal weighing mode, press the [HOLD]-key
several times.
This function may be repeated at will by pressing the [HOLD]-key again.
7.6 Plus/minus weighing
For example unit weight control, fabrication control etc.
Switch-on the balance using the [ON/OFF] key and wait for the „0“ display.
Place target value on weighing platform and tare it to “0” by pressing the [
TARE ]-key. Remove the nominal weight.
Put the test objects subsequently on the weighing plate, the respective devia-
tion from the nominal weight is displayed with the respective sign to „+“ and „“.
According to the same procedure also packages with the same weight can be
produced, referring to a nominal weight.
Back to weighing mode by pressing the [TARE] button.
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8 Service, maintenance, disposal
8.1 Cleaning
Before cleaning, please disconnect the appliance from the operating voltage.
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 and
wipe with a dry soft cloth.
Loose residue sample/powder can be removed carefully with a brush or manual vacuum cleaner.
Spilled weighing goods must be removed immediately.
8.2 Service, 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.
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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:
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.
The displayed weight is permanently
changing
• Draught/air movement
• Table/floor vibrations
• The weighing plate is in contact with for-
eign matter.
• Electromagnetic fields / static charging
(choose different location/switch off interfering device if possible)
The weighing value is obviously
• The display of the balance is not at zero
wrong
• Adjustment is no longer correct.
• Great fluctuations in temperature.
• 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.
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