GB
KERN EMB
Version 2.2 11/2005
Operating Instructions
Electronic Balance
Table of contents:
1 TECHNICAL DATA ................................................................................................................................ 15
2 DECLARATION OF CONFORMTY..................................................................................................... 16
3 FUNDAMENTAL INFORMATION (GENERAL) ............................................................................... 17
3.1
I
NTENDED USE
3.2
I
NAPPROPRIATE USE
3.3
G
UARANTEE
3.4
M
ONITORING THE TEST SUBSTANCES
4 FUNDAMENTAL SAFETY INFORMATION...................................................................................... 18
4.1
O
BSERVE THE INFORMATION IN THE OPERATING INSTRUCTIONS
4.2
S
TAFF TRAINING
5 TRANSPORT AND STORAGE.............................................................................................................. 18
5.1
A
CCEPTANCE CHECK
5.2
P
ACKAGING
6 UNPACKING, INSTALLATION AND COMMISSIONING............................................................... 19
.................................................................................................................................... 17
............................................................................................................................ 17
....................................................................................................................................... 17
.................................................................................................. 17
......................................................... 18
................................................................................................................................. 18
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6.1
P
LACE OF INSTALLATION, PLACE OF USE
6.2
U
NPACKING
6.2.1 Installation.................................................................................................................................... 20
6.2.2 List of items supplied..................................................................................................................... 20
6.3
B
ATTERY OPERATION
6.4
M
AINS SUPPLY
6.5
I
NITIAL START-UP
6.6
A
DJUSTMENT
6.6.1 Adjusting ....................................................................................................................................... 21
6.7
U
NDERFLOOR WEIGHING
7 OPERATION............................................................................................................................................. 23
7.1
O
VERVIEW OF THE KEYPAD
7.2
O
PERATING INSTRUCTIONS
7.2.1 Weighing ....................................................................................................................................... 23
7.2.2 Taring............................................................................................................................................ 23
7.2.3 Units.............................................................................................................................................. 24
8 MAINTENANCE, UPKEEP, DISPOSAL .............................................................................................. 24
8.1
C
LEANING
8.2
M
AINTENANCE, UPKEEP
8.3
D
ISPOSAL
9 TROUBLESHOOTING............................................................................................................................ 25
........................................................................................................................................ 20
......................................................................................................................... 20
.................................................................................................................................... 20
............................................................................................................................... 20
...................................................................................................................................... 21
..................................................................................................................... 22
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............................................................................................. 19
1 Technical data
KERN EMB200-2 EMB600-2 EMB220-1 EMB500-1
Readout 0,01 g 0,01 g 0,1 g 0,1 g
Weighing range 200 g 600 g 220 g 500 g
Reproducibility 0,01 g 0,01 g 0,1 g 0,1 g
Linearity ± 0,02 g ± 0,03 g ± 0,2 g ± 0,3 g
Adjusting weight (not included)
Stabilization time 2-3 sec.
AUTO-OFF-Function
(in battery mode)
Units g / oz / ozt / dwt
Operating temperature 0° C .... + 40° C
Air humidity max. 80 % (non-condensing)
Case (W x D x H) mm 170x240x39
Weighing plate mm Ø 105 Ø 150
Battery supply (standard) 1 x 9 V
Mains adapter (optional) 300 mA / 9V
Underfloor weighing Hanging loop below the cover plate as standard
KERN EMB1200-1 EMB2200-0 EMB5.2K1 EMB5.2K5
Readout 0,1 g 1 g 1 g 5 g
200g (F2) 500g (F2)
after 3 min.
200 g (M1)
AA(2x 1,5V) 9V
200g (M1)
Weighing range 1.200 g 2.200 g 5.200 g 5.200 g
Reproducibility 0,1 g 1 g 1 g 5 g
Linearity ± 0,2 g ± 2 g ± 3 g ± 10 g
Adjusting weight (not included) 1.000 g (M1) 1.000 g (M1) 2.000 g (M1) 2.000g (M1)
Stabilization time 2-3 sec.
AUTO-OFF-Function
(in battery mode)
Units g / oz / ozt / dwt
Operating temperature 0° C .... + 40° C
Air humidity max. 80 % (non-condensing)
Case (W x D x H) mm 170x240x39
Weighing plate mm Ø 150
Battery supply (standard) 9V AA (2x 1,5V) 9V AA (2x 1,5 V)
Mains adapter (optional) 300 mA / 9V
Underfloor weighing Hanging loop below the cover plate as standard
after 3 min.
EMB-BA-defsi-0522
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2 Declaration of conformty
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
Konformitätserklärung
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 cofnromitá per apparecchi contrassegnati con la marcatura CE
English
Deutsch
Français
Español
Italiano
We hereby declare that the product to which this declaration refers conforms with the following standards.
Wir erklären hiermit, dass das Produkt, auf das sich diese Erklärung bezieht, mit den nachstehenden Normen übereinstimmt.
Nous déclarons avec cela responsabilité que le produit, auquel se rapporte la présente
déclaration, est conforme aux normes citées ci-après.
Manifestamos en la presente que el producto al que se refiere esta declaración est´´a de
acuerdo con las normas siguientes
Dichiariamo con ciò che il prodotto al quale la presente dichiarazione si riferisce è conforme alle norme di seguito citate.
Electronic Balances: KERN EMB
Mark applied EU Directive Standards
89/336EEC EMC EN 61000-6-3 : 2001
EN 61000-3-2 : 2000
EN 61000-3-3 : 1995+A1 : 2001
EN 61000-6-1 : 2001
Date: 15.11.2005 Signature:
Gottl. KERN & Sohn GmbH, Ziegelei 1, D-72336 Balingen, Tel. +49-[0]7433/9933-0,Fax +49-[0]7433/9933-149
Gottl. KERN & Sohn GmbH
Management
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EMB-BA-defsi-0421
3 Fundamental information (general)
3.1 Intended use
The balance you have acquired serves to determine the weighing value of the 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. The weighing value can be read off after a stable weighing value has been obtained.
3.2 Inappropriate use
Do not use the 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 a permanent load on the weighing plate. This can damage the measuring equipment.
Be sure to avoid impact shock and overloading the balance in excess of the prescribed maximum load rating (max.), minus any possible tare weight that is already
present. This could cause damage to the balance.
Never operate the balance in hazardous locations. The series design is not explosion-proof.
Structural alterations may not be made to the balance. This can lead to incorrect
weighing results, faults concerning safety regulations as well as to destruction of the
balance.
The balance may only be used in compliance with the described guidelines. Varying
areas of application/planned use must be approved by KERN in writing.
3.3 Guarantee
The guarantee is not valid following
- non-observation of our guidelines in the operating instructions
- use outside the described applications
- alteration to or opening of the device
- mechanical damage and damage caused by media, liquids
- natural wear and tear
- inappropriate erection or electric installation
- overloading of the measuring equipment
3.4 Monitoring the test substances
The metrology features of the balance and any possible available adjusting weight
must be checked at regular intervals within the scope of quality assurance. For this
purpose, the answerable user must define a suitable interval as well as the nature
and scope of this check. 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. Test weights and balances can be adjusted quickly and at
a reasonable price in KERN’s accredited DKD calibration laboratory (return to national normal).
EMB-BA-defsi-0522
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4 Fundamental safety information
4.1 Observe the information in the operating instructions
Please read the operating instructions carefully before erecting and commissioning,
even if you already have experience with KERN balances.
4.2 Staff training
The device may only be operated and looked after by trained members of staff.
5 Transport and storage
5.1 Acceptance check
Please check the packaging immediately upon delivery and the device during unpacking for any visible signs of external damage.
5.2 Packaging
Please retain all parts of the original packaging in case it should be necessary to return items at any time.
Only the original packaging should be used for return consignments.
Before despatch, disconnect all attached cables and loose/movable parts.
Secure all parts, e.g. power unit etc., to prevent slipping and damage.
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EMB-BA-defsi-0421
6 Unpacking, installation and commissioning
6.1 Place of installation, place of use
The balance is constructed in such a way that reliable weighing results can be
achieved under normal application conditions.
By selecting the correct location for your balance, you will be able to work quickly and
precisely.
Therefore please observe the following at the place of installation:
•
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. Inadmissible bedewing (condensation of air moisture on the device) can occur if
a cold device is taken into a significantly warmer environment. In this case,
please acclimatise the device for approx. 2 hours at room temperature after it
has been disconnected from the mains.
•
Avoid static charging of the material to be weighed, weighing container and
windshield.
Major display deviations (incorrect weighing results) are possible if electromagnetic
fields occur as well as due to static charging, currents and instable power supply. It is
then necessary to change the location.
EMB-BA-defsi-0522
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6.2 Unpacking
Carefully remove the balance from its packaging, remove the plastic wrapping and
position the balance in its intended working location.
6.2.1 Installation
Install the balance in such a fashion that the weighing plate is absolutely horizonta
6.2.2 List of items supplied
Standard accessories:
KERN EMB
• Balance
• Operating manual
• Batteries (2 x 1,5 V) or 1 x 9 V
• Hook for underfloor weighing
6.3 Battery Operation
Remove the battery cover from the bottom of the balance. Connect 2 x 1,5V or 1
x
9V
batteries (EMB 200-2/EMB600-2 Block-Battery 9 V). Re-insert the battery cover.
Battery conservation through automatic power-off 3 minutes after ending a weighing
operation.
When the battery power is used up the display will show “LO“. Press the key and
change the batteries at once.
When the balance is not in use for a longer period of time remove batteries and keep
them separately. Leakage of battery liquid might damage the balance.
6.4 Mains supply
Electric power supply is by means of the external mains supply circuit. The printed
voltage level must comply with the local voltage.
Only use original KERN mains supply circuits. The use of other makes is subject to
approval by Kern.
6.5 Initial start-up
A warm-up time of 3 minutes stabilises the measured values after switching on.
The accuracy of the balance depends on the local acceleration of the fall.
Please be sure to observe the information in the chapter on adjusting.
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EMB-BA-defsi-0421
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. It is also recommendable to adjust
the balance periodically during weighing operation in order to obtain exact measured
values.
6.6.1 Adjusting
Using a precision weight, the accuracy of the balance can be checked at any time
and adjusted.
Adjustment procedure:
Check that the surrounding conditions are stable.
A short warm-up time of about 3 minutes is recommended for stabilisation.
• Use the key to switch the balance on.
• Press the key and hold depressed for approx. 10 seconds until “CAL“ ap-
pears on the display.
• Release the key; the size of the calibration weight is shown on the display
(see chapter 1, Technical Data).
• Now place the calibration weight in the centre of the weighing plate.
• “F“ will appear for a brief period of time before the balance switches off.
• Remove the calibration weight. Calibration is completed.
In case of an adjusting error or a wrong adjusting weight “E“ will appear. Repeat the
adjusting procedure.
Keep the adjusting weight near the balance. Daily verification of the balance accuracy is recommended for quality assured applications.
EMB-BA-defsi-0522
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6.7 Underfloor weighing
Objects which, because of their size or shape, cannot be put on the scale, can be
weighed by means of underfloor weighing.
Proceed as follows:
• Switch off the balance.
• Turn the balance over.
• Open the cover plate (1) on the base of the balance.
• Hang on the hook for underfloor weighing (2).
• Place the balance over an opening.
• Hang the item to be weighed on the hook and carry out weighing.
Fig. 1: Setting up the balance for underfloor weighings
!
CAUTION
• For the underfloor weighing use only the original hook of KERN.
• Take care that all hanged items are stable enough to hold the goods which you
wish to weigh (!!Danger of breaking!!).
• Never hang goods more than the maximum permitted weight
(!!Danger of breaking!!).
Always make sure that there are no living beings or materials below the load that
could be injured or damaged.
NOTE
After completing the underfloor weighing, the opening in the floor of the balance
must be closed again (dust protection).
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EMB-BA-defsi-0421
7 Operation
7.1 Overview of the keypad
Key Pressed briefly Pressed for 10 sec
7.2 Operating instructions
7.2.1 Weighing
• The balance is switched on by pressing the key.
• The balance performs auto-diagnostics (for 2 s) and then displays "0".
• If the weighing object is heavier than the weighing range the display indicates
"E" (=Overload).
• The balance is switched off by pressing the key once.
Switching the balance on
Tara-Function
Switching the balance off
Unit changing
Adjusting function
7.2.2 Taring
• Place tare cup on the weighing plate and press
tion changes now to "0".The weight of the cup is now memorised.
• Fill weighing object in the cup, read measuring value.
• By pressing
in the display.
The taring procedure can be repeated several times, for instance to produce a mixture of several components.
The limit is reached when the total weighing range has been used.
After removal of the tare cup the total weight appears as a negative value with „-„
mark.
EMB-BA-defsi-0522
key, after the terminated weighing operation "0" appears again
key. The weighing indica-
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7.2.3 Units
Different foreign weighing units are integrated into the various balance models .
Change the Units with the key.
Press an hold the key , few seconds later change the unit.
Display Conversion factor
1 g =
Gramm g 1.
Unze oz 0.035273962
Troy Unze ozt 0.032150747
Pennyweight dwt 0.643014931
8 Maintenance, upkeep, disposal
8.1 Cleaning
Please disconnect the device from the operating voltage before cleaning.
Only use a cloth dampened with mild suds and not aggressive cleaning agents (sol-
vents or similar). Please ensure that fluids are not able to get into the device and rub
off using a clean, soft cloth.
Loose sample residue/powder can be removed carefully using a brush or hand vacuum cleaner.
Remove any spilt material to be weighed immediately.
8.2 Maintenance, upkeep
The device may only be opened by trained service engineers authorised by KERN.
Disconnect from the mains supply before opening.
8.3 Disposal
The operating company shall dispose of the packaging and the device in compliance
with the valid national or regional law of the operating location.
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EMB-BA-defsi-0421
9 Troubleshooting
The balance should be switched off for a short time following an interruption in the
programme sequence and disconnected from the mains supply. It is then necessary
to repeat the weighing process from the beginning.
Help:
Interruption Possible cause
Weight display is not illuminated.
The weight display changes continually
• The balance is not switched on.
• The batteries are wrongly inserted, the
batteries are empty
• No batteries are attached
• The mains supply connection has been
interrupted (mains cable not plugged
in/faulty).
• Power supply interrupted. .
• 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 result is obviously incorrect
Switch the balance off if other error messages should appear and then switch on
again. Contact the manufacturer if the error message does not disappear.
EMB-BA-defsi-0522
• The balance display is not set to 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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