KERN TEB User manual

KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: [email protected]
Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
Operating instruction
Pocket balance
KERN TEB
Version 1.0
10/2005
GB
TEB-BA-e-0510

TEB-BA-e-0510
2
GB KERN TEB
Version 1.0 10/2005
Operating instruction
Pocket balance
Table of contents:
1Declaration of conformty-------------------------------------------------------------------------------3
2Technical data----------------------------------------------------------------------------------------------4
3Fundamental information (general)-----------------------------------------------------------------4
3.1 Intended use-------------------------------------------------------------------------------------------4
3.2 Inappropriate use-------------------------------------------------------------------------------------4
3.3 Guarantee----------------------------------------------------------------------------------------------5
3.4 Monitoring the test substances -------------------------------------------------------------------5
4Fundamental safety information---------------------------------------------------------------------5
4.1 Observe the information in the operating instructions --------------------------------------5
4.2 Staff training-------------------------------------------------------------------------------------------5
5Transport and storage-----------------------------------------------------------------------------------5
5.1 Acceptance check------------------------------------------------------------------------------------5
5.2 Packaging----------------------------------------------------------------------------------------------5
6Unpacking, installation and commissioning-----------------------------------------------------6
6.1 Place of installation, place of use ----------------------------------------------------------------6
6.2 Unpacking----------------------------------------------------------------------------------------------7
6.2.1 Installation ------------------------------------------------------------------------------------------7
6.2.2 List of items supplied-----------------------------------------------------------------------------7
6.3 Battery operation and change---------------------------------------------------------------------7
6.4 Initial start-up------------------------------------------------------------------------------------------7
6.5 Adjustment---------------------------------------------------------------------------------------------7
6.6 Adjusting------------------------------------------------------------------------------------------------8
7Operation ----------------------------------------------------------------------------------------------------8
7.1 Overview of display (Units on display)----------------------------------------------------------8
7.1.1 Weighing --------------------------------------------------------------------------------------------8
7.1.2 Taring ------------------------------------------------------------------------------------------------9
7.1.3 Plus/Minus Weighings ---------------------------------------------------------------------------9
7.1.4 Net-total weighings -------------------------------------------------------------------------------9
7.1.5 Unit change--------------------------------------------------------------------------------------- 10
8Maintenance, upkeep, disposal -------------------------------------------------------------------- 10
8.1 Cleaning ---------------------------------------------------------------------------------------------- 10
8.2 Maintenance, upkeep ----------------------------------------------------------------------------- 10
8.3 Disposal ---------------------------------------------------------------------------------------------- 10
9Troubleshooting----------------------------------------------------------------------------------------- 11

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1 Declaration of conformty
Declaration of Conformity
The electronic pocket balance
Type: KERN TEB 200-1
correspond to the following EC requirements:
EC-EMC-directive version 89/336/EEC
Compatible norms are, in particular
Standards for electronic scale.
EN 61000-6-3 :2001
EN 61000-6-1 :2001
If a change is made to the above mentioned appliances without consulting KERN
this declaration will become invalid
Date: 01.10 2005 Signature:
Gottl. KERN & Sohn GmbH
Management
Gottl. KERN & Sohn GmbH, Ziegelei 1, 72336 Balingen-Frommern, Tel. [phone], Fax [phone]

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2 Technical data
KERN TEB200-1
Readout (d) 0,1 g
Weighing range (max) 200 g
Taring range (subtractive) 200 g
Adjusting weight 100 g (M3)
Optimal temperature range 18 – 25 °C
Units g / tol / tlt
Permissible relative humidity < 85 %(non-condensing)
Weighing plate mm 70 x 80
Size (B x H x T) mm 85 x 130 x 25
3 Fundamental information (general)
3.1 Intended use
The balance you have acquired serves to determine the weighing value of the mate-
rial 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 ob-
tained.
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 drain-
ing fluids from a container on the balance.)
Do not leave a permanent load on the weighing plate. This can damage the measur-
ing equipment.
Be sure to avoid impact shock and overloading the balance in excess of the pre-
scribed 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 explo-
sion-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.

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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 na-
tional normal).
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 un-
packing 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 re-
turn items at any time.
Only the original packaging should be used for return consignments.

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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. In-
admissible 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, or a failure function of the calcu-
lator) are possible if electromagnetic fields occur as well as due to static charging and
instable power supply. It is then necessary to change the location.

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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:
•Pocket balance
•Batteries
•Operating instructions
6.3 Battery operation and change
•Battery conservation through automatic power-off 3 –4 minutes after ending a
weighing operation.
•When the battery power is used 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 Initial start-up
A warm-up time of 1 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.
6.5 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 lo-
cation and variation of surrounding temperature. It is also recommendable to adjust
the balance periodically during weighing operation in order to obtain exact measured
values.
Battery change
1. Open the battery compartment cover located at
the bottom of the balance (Unblocking battery
compartment cover ( picture 1+2).
2. Insert 2 AAA type batteries (picture 3) .
3. Re-insert and lock the battery cover.( picture 4).

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6.6 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 1 minutes are recommended for stabilisation.
Press key approx. 3 seconds, ”CAL ” and then the exact weight of the adjusting
weight will appear the display.
Place the adjusting weight on the centre of the weighing plate.
“ F” will appear somewhat later, and then turn off.
In case of an adjusting error or a wrong adjusting weight “ E” appears in the display.
7 Operation
7.1 Overview of display (Units on display)
7.1.1 Weighing
Switch the balance on by pressing the key.
The balance will show “8888” for approx. 3seconds and then change to “0”. Now it
is ready for use.
Important: If the display does not show 0, press the key.
Only now (!) place object on the weighing pan. Make sure that the weighing object
does not stripe or touch the housing or base.
If the object should be heavier than the weighing range allowance, the symbol “E”
(overload) will appear on the display .

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7.1.2 Taring
Switch the balance on by pressing the key, then wait for the “0” indication.
Place the tare cup on the weighing plate and press the key. Indication will go to
“0”. Now the weight of the cup is memorised internally.
Fill the object into the cup, read the measuring value.
By pressing the key after a weighing procedure, “0” will appear on the display
again.
The taring procedure can be repeated continuously, for instance when mixing several
components.
The limit is reached when the full weighing range is overlay.
After having removed the tare cup , the total weight will appear as a negative value.
7.1.3 Plus/Minus Weighings
For instance to control piece-weights.
Switch the balance on by pressing the key, then wait until “0” is indicated.
Place rated weight on the weighing plate and tare on “0” by key. Remove rated
weight.
Place the objects on the weighing pan successively, the balance will show any devia-
tion from the rated weight in “+” and “-“.
According to the same procedure packages with the same weight, related to a rated
weight, can be produced. Return to the weighing mode by pressing the key.
7.1.4 Net-total weighings
Useful when a mixture of several components will be weighed in a tare cup, and fi-
nally the sum weight of all components weighed in will be needed for direction (net-
total, i.e. without the weight of the tare cup).
Example:
Tare cup on weighing plate, tare on “0“ by pressing the key.
Weigh component nand tare back to “0” with the key. The activation of the
memory is shown by a triangle on the far left of the display.
Weigh component o, by pressing the key the net total is displayed, this means
the sum of component nand o. Tare to “0” by pressing the key.
Weigh component p, by pressing the key the net-total is displayed, this means
the sum of the components nand oand p.
If necessary fill the formula container up to the desirable level. To return to the weigh-
ing mode press the key

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7.1.5 Unit change
Switch the balance on by pressing the key, then wait for the “0” indication.
The units set in the balance can be selected between the different units, by pressing
the key
Display
Conversion factor 1 g =
Gramm * g 1.
Tael Taiwan tlt 0.02667
Tola tol 0.08573
* Factory setting
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 vac-
uum 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.
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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9 Troubleshooting
The balance should be switched off for a short time following an interruption in the
programme sequence . It is then necessary to repeat the weighing process from the
beginning.
Help:
Interruption Possible cause
Weight display is not illuminated. •The balance is not switched on.
•The batteries are wrongly inserted, the
batteries are empty
•No batteries are attached
The weight display changes continu-
ally •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 inter-
fering device if possible)
The weighing result is obviously in-
correct •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 inter-
fering device if possible)
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.